Springboot应用整合Sentinel实现限流、熔断、降级笔记https://blog.csdn.net/chenjian723122704/article/details/130101875

Sentinel版本 1.8.6

Nacos版本 2.2.0 

下载Sentinel源码 Sentinel1.8.6：https://github.com/alibaba/Sentinel/releases/tag/1.8.6

拷贝源码压缩包中的sentinel-dashboard至工程目录，使用Idea打开

 1.去掉pom.xml中的test

        <dependency>
            <groupId>com.alibaba.csp</groupId>
            <artifactId>sentinel-datasource-nacos</artifactId>
            <!--<scope>test</scope>-->
        </dependency>

2.application.properties 文件增加Nacos及其他相关配置

server.port=8800
csp.sentinel.dashboard.server=127.0.0.1:8800
project.name=sentinel-dashboard
# Nacos settings
sentinel.nacos.serverAddr=127.0.0.1:8848
sentinel.nacos.username=nacos
sentinel.nacos.password=nacos
sentinel.nacos.namespace=

 3.复制test下的Nacos包至main下的rule报下

目录介绍：

1. FlowRuleNacosProvider： 动态获取Nacos配置中心流控规则
2. FlowRuleNacosPublisher： publish上传流控规则到Nacos配置中心
3. NacosConfig： Nacos配置
4. NacosConfigUtils： 流控规则配置

 4.Nacos基础类相关的改造

新建 NacosConfigProperties.java 文件，用于获取Nacos配置

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Component
@ConfigurationProperties(prefix = "sentinel.nacos")
public class NacosConfigProperties {
    /* nacos地址 */
    private String serverAddr;
    /* nacos登录名 */
    private String username;
    /* nacos 登录密码 */
    private String password;
    /* nacos命名空间 */
    private String namespace;

    public String getServerAddr() {
        return serverAddr;
    }

    public void setServerAddr(String serverAddr) {
        this.serverAddr = serverAddr;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getNamespace() {
        return namespace;
    }

    public void setNamespace(String namespace) {
        this.namespace = namespace;
    }
}

 改造NacosConfig，在新建NacosService时注入Nacos配置

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.fastjson.JSON;
import com.alibaba.nacos.api.PropertyKeyConst;
import com.alibaba.nacos.api.config.ConfigFactory;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.List;
import java.util.Properties;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Configuration
public class NacosConfig {
    @Autowired
    private NacosConfigProperties nacosConfigProperties;

    @Bean
    public Converter<List<FlowRuleEntity>, String> flowRuleEntityEncoder() {
        return JSON::toJSONString;
    }

    @Bean
    public Converter<String, List<FlowRuleEntity>> flowRuleEntityDecoder() {
        return s -> JSON.parseArray(s, FlowRuleEntity.class);
    }

    @Bean
    public ConfigService nacosConfigService() throws Exception {
//        return ConfigFactory.createConfigService("localhost");
        // 新增
        Properties properties = new Properties();
        properties.put(PropertyKeyConst.SERVER_ADDR,nacosConfigProperties.getServerAddr());
        properties.put(PropertyKeyConst.USERNAME,nacosConfigProperties.getUsername());
        properties.put(PropertyKeyConst.PASSWORD,nacosConfigProperties.getPassword());
        properties.put(PropertyKeyConst.NAMESPACE,nacosConfigProperties.getNamespace());
        return ConfigFactory.createConfigService(properties);
    }
}

新建 NacosSupport 类，它定义了Nacos的组名以及各个配置文件的后缀，同时将Nacos操作集中到该类中，方便后续调用。

import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.exception.NacosException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

/**
 * @author lei
 * @create 2022-04-13 15:17
 * @desc nacos操作类
 **/
@Service
public class NacosSupport {

    private final ConfigService configService;

    private static final Logger logger = LoggerFactory.getLogger(NacosSupport.class);

    private NacosSupport(ConfigService configService) {
        this.configService = configService;
    }

    public static final String GROUP_ID = "SENTINEL_GROUP";
    public static final String RULE_PREFIX = "";

    public static final String FLOW_DATA_ID_POSTFIX = RULE_PREFIX + "-flow-rules";
    public static final String DEGRADE_DATA_ID_POSTFIX = RULE_PREFIX + "-degrade-rules";
    public static final String SYSTEM_DATA_ID_POSTFIX = RULE_PREFIX + "-system-rules";
    public static final String PARAM_FLOW_DATA_ID_POSTFIX = RULE_PREFIX + "-param-flow-rules";
    public static final String AUTHORITY_DATA_ID_POSTFIX = RULE_PREFIX + "-authority-rules";
    public static final String DASHBOARD_POSTFIX = "-dashboard";
    public static final String CLUSTER_MAP_DATA_ID_POSTFIX = RULE_PREFIX + "-cluster-map";

    public static final String API_DEFINITION_DATA_ID_POSTFIX = RULE_PREFIX + "-gw-api-groups";
    public static final String GATEWAY_FLOW_DATA_ID_POSTFIX = RULE_PREFIX + "-gw-flow-rules";

    public static final String TYPE = "json";


    /**
     * 将规则序列化成JSON文本，存储到Nacos-server中 (nacos持久化的数据库，可能是内存，可能是DB，一切看Nacos的持久化配置是否开启Mysql存储）
     *
     * @param app     应用名称
     * @param postfix 规则后缀
     * @param rules   规则对象
     * @throws NacosException 异常
     */
    public <T> void pushRule(String app, String postfix, List<T> rules) throws NacosException {
        if (StringUtil.isBlank(app)) {
            throw new RuntimeException("位置APP-NAME");
        }
        if (rules == null) {
            return;
        }

        // 规则消息推送至nacos
        String dataId = genDataId(app, postfix);
        configService.publishConfig(dataId, NacosSupport.GROUP_ID, JSON.toJSONString(rules), TYPE);

    }

    /**
     * 从Nacos server中查询响应规则，并将其反序列化成对应Rule实体
     *
     * @param appName 应用名称
     * @param postfix 规则后缀
     * @param clazz   类
     * @param <T>     泛型
     * @return 规则对象列表
     * @throws NacosException 异常
     */
    public <T> List<T> getRule(String appName, String postfix, Class<T> clazz) throws NacosException {
        String rules = configService.getConfig(genDataId(appName, postfix), NacosSupport.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return JSON.parseArray(rules, clazz);
    }

    private static String genDataId(String appName, String postfix) {
        return appName + postfix;
    }
}

5.流控规则持久化修改

5.1 在com.alibaba.csp.sentinel.dashboard.rule.nacos下新建flow包，将从Test拷贝的 FlowRuleNacosProvider、FlowRuleNacosPublisher 

 上图中 com.alibaba.csp.sentinel.dashboard.rule.nacos 下包介绍：

• apidefinition ： 网关API管理Nacos操作类
• gatewayflow： 网关限流规则Nacos操作类
• authority： 授权规则Nacos操作类
• degrade： 熔断规则Nacos操作类
• paramflow： 热点规则Nacos操作类
• system： 系统规则Nacos操作类

5.2 改造  FlowRuleNacosProvider 类，使用 NacosSupport

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.flow;

import java.util.List;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import org.springframework.stereotype.Component;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("flowRuleNacosProvider")
public class FlowRuleNacosProvider implements DynamicRuleProvider<List<FlowRuleEntity>> {

    private final NacosSupport nacosSupport;

    public FlowRuleNacosProvider(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public List<FlowRuleEntity> getRules(String appName) throws Exception {

        return nacosSupport.getRule(appName, NacosSupport.FLOW_DATA_ID_POSTFIX, FlowRuleEntity.class);
    }
}

5.3 改造  FlowRuleNacosPublisher 类，使用 NacosSupport

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.flow;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.util.AssertUtil;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("flowRuleNacosPublisher")
public class FlowRuleNacosPublisher implements DynamicRulePublisher<List<FlowRuleEntity>> {

    private final NacosSupport nacosSupport;

    public FlowRuleNacosPublisher(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public void publish(String app, List<FlowRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        nacosSupport.pushRule(app, NacosSupport.FLOW_DATA_ID_POSTFIX, rules);
    }
}

5.4 改造流控FlowControllerV1

位于 com.alibaba.csp.sentinel.dashboard.controller

从Nacos获取配置信息，并将新增、修改、删除流控的操作，全部推送至Nacos。

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller;

import java.util.Date;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
import com.alibaba.csp.sentinel.dashboard.discovery.AppManagement;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.util.StringUtil;

import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.domain.Result;
import com.alibaba.csp.sentinel.dashboard.repository.rule.InMemoryRuleRepositoryAdapter;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * Flow rule controller.
 *
 * @author leyou
 * @author Eric Zhao
 */
@RestController
@RequestMapping(value = "/v1/flow")
public class FlowControllerV1 {

    private final Logger logger = LoggerFactory.getLogger(FlowControllerV1.class);

    @Autowired
    private InMemoryRuleRepositoryAdapter<FlowRuleEntity> repository;
    @Autowired
    private AppManagement appManagement;

    @Autowired
    @Qualifier("flowRuleNacosProvider")
    private DynamicRuleProvider<List<FlowRuleEntity>> ruleProvider;
    @Autowired
    @Qualifier("flowRuleNacosPublisher")
    private DynamicRulePublisher<List<FlowRuleEntity>> rulePublisher;


    @Autowired
    private SentinelApiClient sentinelApiClient;

    @GetMapping("/rules")
    @AuthAction(PrivilegeType.READ_RULE)
    public Result<List<FlowRuleEntity>> apiQueryMachineRules(@RequestParam String app,
                                                             @RequestParam String ip,
                                                             @RequestParam Integer port) {
        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        if (!appManagement.isValidMachineOfApp(app, ip)) {
            return Result.ofFail(-1, "given ip does not belong to given app");
        }
        try {
//            List<FlowRuleEntity> rules = sentinelApiClient.fetchFlowRuleOfMachine(app, ip, port);
            List<FlowRuleEntity> rules = ruleProvider.getRules(app);
            rules = repository.saveAll(rules);
            return Result.ofSuccess(rules);
        } catch (Throwable throwable) {
            logger.error("Error when querying flow rules", throwable);
            return Result.ofThrowable(-1, throwable);
        }
    }

    private <R> Result<R> checkEntityInternal(FlowRuleEntity entity) {
        if (StringUtil.isBlank(entity.getApp())) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isBlank(entity.getIp())) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (entity.getPort() == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        if (!appManagement.isValidMachineOfApp(entity.getApp(), entity.getIp())) {
            return Result.ofFail(-1, "given ip does not belong to given app");
        }
        if (StringUtil.isBlank(entity.getLimitApp())) {
            return Result.ofFail(-1, "limitApp can't be null or empty");
        }
        if (StringUtil.isBlank(entity.getResource())) {
            return Result.ofFail(-1, "resource can't be null or empty");
        }
        if (entity.getGrade() == null) {
            return Result.ofFail(-1, "grade can't be null");
        }
        if (entity.getGrade() != 0 && entity.getGrade() != 1) {
            return Result.ofFail(-1, "grade must be 0 or 1, but " + entity.getGrade() + " got");
        }
        if (entity.getCount() == null || entity.getCount() < 0) {
            return Result.ofFail(-1, "count should be at lease zero");
        }
        if (entity.getStrategy() == null) {
            return Result.ofFail(-1, "strategy can't be null");
        }
        if (entity.getStrategy() != 0 && StringUtil.isBlank(entity.getRefResource())) {
            return Result.ofFail(-1, "refResource can't be null or empty when strategy!=0");
        }
        if (entity.getControlBehavior() == null) {
            return Result.ofFail(-1, "controlBehavior can't be null");
        }
        int controlBehavior = entity.getControlBehavior();
        if (controlBehavior == 1 && entity.getWarmUpPeriodSec() == null) {
            return Result.ofFail(-1, "warmUpPeriodSec can't be null when controlBehavior==1");
        }
        if (controlBehavior == 2 && entity.getMaxQueueingTimeMs() == null) {
            return Result.ofFail(-1, "maxQueueingTimeMs can't be null when controlBehavior==2");
        }
        if (entity.isClusterMode() && entity.getClusterConfig() == null) {
            return Result.ofFail(-1, "cluster config should be valid");
        }
        return null;
    }

    @PostMapping("/rule")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<FlowRuleEntity> apiAddFlowRule(@RequestBody FlowRuleEntity entity) {
        Result<FlowRuleEntity> checkResult = checkEntityInternal(entity);
        if (checkResult != null) {
            return checkResult;
        }
        entity.setId(null);
        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);
        entity.setLimitApp(entity.getLimitApp().trim());
        entity.setResource(entity.getResource().trim());
        try {
            entity = repository.save(entity);

            publishRules(entity.getApp());
//            publishRules(entity.getApp(), entity.getIp(), entity.getPort()).get(5000, TimeUnit.MILLISECONDS);
            return Result.ofSuccess(entity);
        } catch (Throwable t) {
            Throwable e = t instanceof ExecutionException ? t.getCause() : t;
            logger.error("Failed to add new flow rule, app={}, ip={}", entity.getApp(), entity.getIp(), e);
            return Result.ofFail(-1, e.getMessage());
        }
    }

    @PutMapping("/save.json")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<FlowRuleEntity> apiUpdateFlowRule(Long id, String app,
                                                  String limitApp, String resource, Integer grade,
                                                  Double count, Integer strategy, String refResource,
                                                  Integer controlBehavior, Integer warmUpPeriodSec,
                                                  Integer maxQueueingTimeMs) {
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }
        FlowRuleEntity entity = repository.findById(id);
        if (entity == null) {
            return Result.ofFail(-1, "id " + id + " dose not exist");
        }
        if (StringUtil.isNotBlank(app)) {
            entity.setApp(app.trim());
        }
        if (StringUtil.isNotBlank(limitApp)) {
            entity.setLimitApp(limitApp.trim());
        }
        if (StringUtil.isNotBlank(resource)) {
            entity.setResource(resource.trim());
        }
        if (grade != null) {
            if (grade != 0 && grade != 1) {
                return Result.ofFail(-1, "grade must be 0 or 1, but " + grade + " got");
            }
            entity.setGrade(grade);
        }
        if (count != null) {
            entity.setCount(count);
        }
        if (strategy != null) {
            if (strategy != 0 && strategy != 1 && strategy != 2) {
                return Result.ofFail(-1, "strategy must be in [0, 1, 2], but " + strategy + " got");
            }
            entity.setStrategy(strategy);
            if (strategy != 0) {
                if (StringUtil.isBlank(refResource)) {
                    return Result.ofFail(-1, "refResource can't be null or empty when strategy!=0");
                }
                entity.setRefResource(refResource.trim());
            }
        }
        if (controlBehavior != null) {
            if (controlBehavior != 0 && controlBehavior != 1 && controlBehavior != 2) {
                return Result.ofFail(-1, "controlBehavior must be in [0, 1, 2], but " + controlBehavior + " got");
            }
            if (controlBehavior == 1 && warmUpPeriodSec == null) {
                return Result.ofFail(-1, "warmUpPeriodSec can't be null when controlBehavior==1");
            }
            if (controlBehavior == 2 && maxQueueingTimeMs == null) {
                return Result.ofFail(-1, "maxQueueingTimeMs can't be null when controlBehavior==2");
            }
            entity.setControlBehavior(controlBehavior);
            if (warmUpPeriodSec != null) {
                entity.setWarmUpPeriodSec(warmUpPeriodSec);
            }
            if (maxQueueingTimeMs != null) {
                entity.setMaxQueueingTimeMs(maxQueueingTimeMs);
            }
        }
        Date date = new Date();
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            if (entity == null) {
                return Result.ofFail(-1, "save entity fail: null");
            }

            publishRules(entity.getApp());
//            publishRules(entity.getApp(), entity.getIp(), entity.getPort()).get(5000, TimeUnit.MILLISECONDS);
            return Result.ofSuccess(entity);
        } catch (Throwable t) {
            Throwable e = t instanceof ExecutionException ? t.getCause() : t;
            logger.error("Error when updating flow rules, app={}, ip={}, ruleId={}", entity.getApp(),
                entity.getIp(), id, e);
            return Result.ofFail(-1, e.getMessage());
        }
    }

    @DeleteMapping("/delete.json")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<Long> apiDeleteFlowRule(Long id) {

        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }
        FlowRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }

        try {
            repository.delete(id);
        } catch (Exception e) {
            return Result.ofFail(-1, e.getMessage());
        }
        try {
            publishRules(oldEntity.getApp());
//            publishRules(oldEntity.getApp(), oldEntity.getIp(), oldEntity.getPort()).get(5000, TimeUnit.MILLISECONDS);
            return Result.ofSuccess(id);
        } catch (Throwable t) {
            Throwable e = t instanceof ExecutionException ? t.getCause() : t;
            logger.error("Error when deleting flow rules, app={}, ip={}, id={}", oldEntity.getApp(),
                oldEntity.getIp(), id, e);
            return Result.ofFail(-1, e.getMessage());
        }
    }

    private CompletableFuture<Void> publishRules(String app, String ip, Integer port) {
        List<FlowRuleEntity> rules = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.setFlowRuleOfMachineAsync(app, ip, port, rules);
    }

    private void publishRules(/*@NonNull*/ String app) throws Exception {
        List<FlowRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
}

至此，限流规则持久化改造完成。

其他的规则的持久化与限流规则一致，以下就不详细说明，粘贴下源码。

6.网关API管理规则持久化改造

6.1 Nacos操作类-ApiDefinitionFlowRuleNacosProvider

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.apidefinition.ApiDefinitionFlowRuleNacosProvider 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.apidefinition;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.ApiDefinitionEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("apiDefinitionFlowRuleNacosProvider")
public class ApiDefinitionFlowRuleNacosProvider implements DynamicRuleProvider<List<ApiDefinitionEntity>> {

    private final NacosSupport nacosSupport;

    public ApiDefinitionFlowRuleNacosProvider(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public List<ApiDefinitionEntity> getRules(String appName) throws Exception {

        return nacosSupport.getRule(appName, NacosSupport.API_DEFINITION_DATA_ID_POSTFIX, ApiDefinitionEntity.class);
    }
}

6.2 Nacos操作类-ApiDefinitionFlowRuleNacosPublisher

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.apidefinition.ApiDefinitionFlowRuleNacosPublisher

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.apidefinition;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.ApiDefinitionEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.util.AssertUtil;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("apiDefinitionFlowRuleNacosPublisher")
public class ApiDefinitionFlowRuleNacosPublisher implements DynamicRulePublisher<List<ApiDefinitionEntity>> {

    private final NacosSupport nacosSupport;

    public ApiDefinitionFlowRuleNacosPublisher(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public void publish(String app, List<ApiDefinitionEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        nacosSupport.pushRule(app, NacosSupport.API_DEFINITION_DATA_ID_POSTFIX, rules);
    }
}

6.3 controller改造

包位于 com.alibaba.csp.sentinel.dashboard.controller.gateway.GatewayApiController 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller.gateway;

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.ApiDefinitionEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.ApiPredicateItemEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.domain.Result;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.api.AddApiReqVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.api.ApiPredicateItemVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.api.UpdateApiReqVo;
import com.alibaba.csp.sentinel.dashboard.repository.gateway.InMemApiDefinitionStore;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.util.StringUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.util.*;

import static com.alibaba.csp.sentinel.adapter.gateway.common.SentinelGatewayConstants.*;

/**
 * Gateway api Controller for manage gateway api definitions.
 *
 * @author cdfive
 * @since 1.7.0
 */
@RestController
@RequestMapping(value = "/gateway/api")
public class GatewayApiController {

    private final Logger logger = LoggerFactory.getLogger(GatewayApiController.class);

    @Autowired
    private InMemApiDefinitionStore repository;

    @Autowired
    @Qualifier("apiDefinitionFlowRuleNacosProvider")
    private DynamicRuleProvider<List<ApiDefinitionEntity>> ruleProvider;
    @Autowired
    @Qualifier("apiDefinitionFlowRuleNacosPublisher")
    private DynamicRulePublisher<List<ApiDefinitionEntity>> rulePublisher;

    @Autowired
    private SentinelApiClient sentinelApiClient;

    @GetMapping("/list.json")
    @AuthAction(AuthService.PrivilegeType.READ_RULE)
    public Result<List<ApiDefinitionEntity>> queryApis(String app, String ip, Integer port) {

        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }

        try {
//            List<ApiDefinitionEntity> apis = sentinelApiClient.fetchApis(app, ip, port).get();

            List<ApiDefinitionEntity> apis = ruleProvider.getRules(app);
            repository.saveAll(apis);
            return Result.ofSuccess(apis);
        } catch (Throwable throwable) {
            logger.error("queryApis error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }
    }

    @PostMapping("/new.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<ApiDefinitionEntity> addApi(HttpServletRequest request, @RequestBody AddApiReqVo reqVo) {

        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        ApiDefinitionEntity entity = new ApiDefinitionEntity();
        entity.setApp(app.trim());

        String ip = reqVo.getIp();
        if (StringUtil.isBlank(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        entity.setIp(ip.trim());

        Integer port = reqVo.getPort();
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        entity.setPort(port);

        // API名称
        String apiName = reqVo.getApiName();
        if (StringUtil.isBlank(apiName)) {
            return Result.ofFail(-1, "apiName can't be null or empty");
        }
        entity.setApiName(apiName.trim());

        // 匹配规则列表
        List<ApiPredicateItemVo> predicateItems = reqVo.getPredicateItems();
        if (CollectionUtils.isEmpty(predicateItems)) {
            return Result.ofFail(-1, "predicateItems can't empty");
        }

        List<ApiPredicateItemEntity> predicateItemEntities = new ArrayList<>();
        for (ApiPredicateItemVo predicateItem : predicateItems) {
            ApiPredicateItemEntity predicateItemEntity = new ApiPredicateItemEntity();

            // 匹配模式
            Integer matchStrategy = predicateItem.getMatchStrategy();
            if (!Arrays.asList(URL_MATCH_STRATEGY_EXACT, URL_MATCH_STRATEGY_PREFIX, URL_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                return Result.ofFail(-1, "invalid matchStrategy: " + matchStrategy);
            }
            predicateItemEntity.setMatchStrategy(matchStrategy);

            // 匹配串
            String pattern = predicateItem.getPattern();
            if (StringUtil.isBlank(pattern)) {
                return Result.ofFail(-1, "pattern can't be null or empty");
            }
            predicateItemEntity.setPattern(pattern);

            predicateItemEntities.add(predicateItemEntity);
        }
        entity.setPredicateItems(new LinkedHashSet<>(predicateItemEntities));

        // 检查API名称不能重复
        List<ApiDefinitionEntity> allApis = repository.findAllByMachine(MachineInfo.of(app.trim(), ip.trim(), port));
        if (allApis.stream().map(o -> o.getApiName()).anyMatch(o -> o.equals(apiName.trim()))) {
            return Result.ofFail(-1, "apiName exists: " + apiName);
        }

        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
            publishApis(app);
        } catch (Throwable throwable) {
            logger.error("add gateway api error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        return Result.ofSuccess(entity);
    }

    @PostMapping("/save.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<ApiDefinitionEntity> updateApi(@RequestBody UpdateApiReqVo reqVo) {
        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        Long id = reqVo.getId();
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        ApiDefinitionEntity entity = repository.findById(id);
        if (entity == null) {
            return Result.ofFail(-1, "api does not exist, id=" + id);
        }

        // 匹配规则列表
        List<ApiPredicateItemVo> predicateItems = reqVo.getPredicateItems();
        if (CollectionUtils.isEmpty(predicateItems)) {
            return Result.ofFail(-1, "predicateItems can't empty");
        }

        List<ApiPredicateItemEntity> predicateItemEntities = new ArrayList<>();
        for (ApiPredicateItemVo predicateItem : predicateItems) {
            ApiPredicateItemEntity predicateItemEntity = new ApiPredicateItemEntity();

            // 匹配模式
            int matchStrategy = predicateItem.getMatchStrategy();
            if (!Arrays.asList(URL_MATCH_STRATEGY_EXACT, URL_MATCH_STRATEGY_PREFIX, URL_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                return Result.ofFail(-1, "Invalid matchStrategy: " + matchStrategy);
            }
            predicateItemEntity.setMatchStrategy(matchStrategy);

            // 匹配串
            String pattern = predicateItem.getPattern();
            if (StringUtil.isBlank(pattern)) {
                return Result.ofFail(-1, "pattern can't be null or empty");
            }
            predicateItemEntity.setPattern(pattern);

            predicateItemEntities.add(predicateItemEntity);
        }
        entity.setPredicateItems(new LinkedHashSet<>(predicateItemEntities));

        Date date = new Date();
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
            publishApis(app);
        } catch (Throwable throwable) {
            logger.error("update gateway api error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        return Result.ofSuccess(entity);
    }

    @PostMapping("/delete.json")
    @AuthAction(AuthService.PrivilegeType.DELETE_RULE)

    public Result<Long> deleteApi(Long id) {
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        ApiDefinitionEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }

        try {
            repository.delete(id);
            publishApis(oldEntity.getApp());
        } catch (Throwable throwable) {
            logger.error("delete gateway api error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        return Result.ofSuccess(id);
    }

    private boolean publishApis(String app, String ip, Integer port) {
        List<ApiDefinitionEntity> apis = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.modifyApis(app, ip, port, apis);
    }


    private void publishApis(/*@NonNull*/ String app) throws Exception {
        List<ApiDefinitionEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
}

7.网关限流规则持久化改造

7.1 Nacos操作类-GatewayFlowRuleNacosProvider 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.gatewayflow.GatewayFlowRuleNacosProvider 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.gatewayflow;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.SystemRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("gatewayFlowRuleNacosProvider")
public class GatewayFlowRuleNacosProvider implements DynamicRuleProvider<List<GatewayFlowRuleEntity>> {

    private final NacosSupport nacosSupport;

    public GatewayFlowRuleNacosProvider(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public List<GatewayFlowRuleEntity> getRules(String appName) throws Exception {

        return nacosSupport.getRule(appName, NacosSupport.GATEWAY_FLOW_DATA_ID_POSTFIX, GatewayFlowRuleEntity.class);
    }
}

7.2 Nacos操作类-GatewayFlowRuleNacosPublisher 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.gatewayflow.GatewayFlowRuleNacosPublisher 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.gatewayflow;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.SystemRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.util.AssertUtil;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("gatewayFlowRuleNacosPublisher")
public class GatewayFlowRuleNacosPublisher implements DynamicRulePublisher<List<GatewayFlowRuleEntity>> {

    private final NacosSupport nacosSupport;

    public GatewayFlowRuleNacosPublisher(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public void publish(String app, List<GatewayFlowRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        nacosSupport.pushRule(app, NacosSupport.GATEWAY_FLOW_DATA_ID_POSTFIX, rules);
    }
}

7.3 controller改造

包位于 com.alibaba.csp.sentinel.dashboard.controller.gateway.GatewayFlowRuleController 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller.gateway;


import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayParamFlowItemEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.domain.Result;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.rule.AddFlowRuleReqVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.rule.GatewayParamFlowItemVo;
import com.alibaba.csp.sentinel.dashboard.domain.vo.gateway.rule.UpdateFlowRuleReqVo;
import com.alibaba.csp.sentinel.dashboard.repository.gateway.InMemGatewayFlowRuleStore;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.util.StringUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.*;

import java.util.Arrays;
import java.util.Date;
import java.util.List;

import static com.alibaba.csp.sentinel.slots.block.RuleConstant.*;
import static com.alibaba.csp.sentinel.adapter.gateway.common.SentinelGatewayConstants.*;
import static com.alibaba.csp.sentinel.dashboard.datasource.entity.gateway.GatewayFlowRuleEntity.*;

/**
 * Gateway flow rule Controller for manage gateway flow rules.
 *
 * @author cdfive
 * @since 1.7.0
 */
@RestController
@RequestMapping(value = "/gateway/flow")
public class GatewayFlowRuleController {

    private final Logger logger = LoggerFactory.getLogger(GatewayFlowRuleController.class);

    @Autowired
    private InMemGatewayFlowRuleStore repository;

    @Autowired
    @Qualifier("gatewayFlowRuleNacosProvider")
    private DynamicRuleProvider<List<GatewayFlowRuleEntity>> ruleProvider;
    @Autowired
    @Qualifier("gatewayFlowRuleNacosPublisher")
    private DynamicRulePublisher<List<GatewayFlowRuleEntity>> rulePublisher;

    @Autowired
    private SentinelApiClient sentinelApiClient;

    @GetMapping("/list.json")
    @AuthAction(AuthService.PrivilegeType.READ_RULE)
    public Result<List<GatewayFlowRuleEntity>> queryFlowRules(String app, String ip, Integer port) {

        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }

        try {
//            List<GatewayFlowRuleEntity> rules = sentinelApiClient.fetchGatewayFlowRules(app, ip, port).get();
            List<GatewayFlowRuleEntity> rules = ruleProvider.getRules(app);
            repository.saveAll(rules);
            return Result.ofSuccess(rules);
        } catch (Throwable throwable) {
            logger.error("query gateway flow rules error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }
    }

    @PostMapping("/new.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<GatewayFlowRuleEntity> addFlowRule(@RequestBody AddFlowRuleReqVo reqVo) {

        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        GatewayFlowRuleEntity entity = new GatewayFlowRuleEntity();
        entity.setApp(app.trim());

        String ip = reqVo.getIp();
        if (StringUtil.isBlank(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        entity.setIp(ip.trim());

        Integer port = reqVo.getPort();
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        entity.setPort(port);

        // API类型, Route ID或API分组
        Integer resourceMode = reqVo.getResourceMode();
        if (resourceMode == null) {
            return Result.ofFail(-1, "resourceMode can't be null");
        }
        if (!Arrays.asList(RESOURCE_MODE_ROUTE_ID, RESOURCE_MODE_CUSTOM_API_NAME).contains(resourceMode)) {
            return Result.ofFail(-1, "invalid resourceMode: " + resourceMode);
        }
        entity.setResourceMode(resourceMode);

        // API名称
        String resource = reqVo.getResource();
        if (StringUtil.isBlank(resource)) {
            return Result.ofFail(-1, "resource can't be null or empty");
        }
        entity.setResource(resource.trim());

        // 针对请求属性
        GatewayParamFlowItemVo paramItem = reqVo.getParamItem();
        if (paramItem != null) {
            GatewayParamFlowItemEntity itemEntity = new GatewayParamFlowItemEntity();
            entity.setParamItem(itemEntity);

            // 参数属性 0-ClientIP 1-Remote Host 2-Header 3-URL参数 4-Cookie
            Integer parseStrategy = paramItem.getParseStrategy();
            if (!Arrays.asList(PARAM_PARSE_STRATEGY_CLIENT_IP, PARAM_PARSE_STRATEGY_HOST, PARAM_PARSE_STRATEGY_HEADER
                    , PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                return Result.ofFail(-1, "invalid parseStrategy: " + parseStrategy);
            }
            itemEntity.setParseStrategy(paramItem.getParseStrategy());

            // 当参数属性为2-Header 3-URL参数 4-Cookie时，参数名称必填
            if (Arrays.asList(PARAM_PARSE_STRATEGY_HEADER, PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                // 参数名称
                String fieldName = paramItem.getFieldName();
                if (StringUtil.isBlank(fieldName)) {
                    return Result.ofFail(-1, "fieldName can't be null or empty");
                }
                itemEntity.setFieldName(paramItem.getFieldName());
            }

            String pattern = paramItem.getPattern();
            // 如果匹配串不为空，验证匹配模式
            if (StringUtil.isNotEmpty(pattern)) {
                itemEntity.setPattern(pattern);
                Integer matchStrategy = paramItem.getMatchStrategy();
                if (!Arrays.asList(PARAM_MATCH_STRATEGY_EXACT, PARAM_MATCH_STRATEGY_CONTAINS, PARAM_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                    return Result.ofFail(-1, "invalid matchStrategy: " + matchStrategy);
                }
                itemEntity.setMatchStrategy(matchStrategy);
            }
        }

        // 阈值类型 0-线程数 1-QPS
        Integer grade = reqVo.getGrade();
        if (grade == null) {
            return Result.ofFail(-1, "grade can't be null");
        }
        if (!Arrays.asList(FLOW_GRADE_THREAD, FLOW_GRADE_QPS).contains(grade)) {
            return Result.ofFail(-1, "invalid grade: " + grade);
        }
        entity.setGrade(grade);

        // QPS阈值
        Double count = reqVo.getCount();
        if (count == null) {
            return Result.ofFail(-1, "count can't be null");
        }
        if (count < 0) {
            return Result.ofFail(-1, "count should be at lease zero");
        }
        entity.setCount(count);

        // 间隔
        Long interval = reqVo.getInterval();
        if (interval == null) {
            return Result.ofFail(-1, "interval can't be null");
        }
        if (interval <= 0) {
            return Result.ofFail(-1, "interval should be greater than zero");
        }
        entity.setInterval(interval);

        // 间隔单位
        Integer intervalUnit = reqVo.getIntervalUnit();
        if (intervalUnit == null) {
            return Result.ofFail(-1, "intervalUnit can't be null");
        }
        if (!Arrays.asList(INTERVAL_UNIT_SECOND, INTERVAL_UNIT_MINUTE, INTERVAL_UNIT_HOUR, INTERVAL_UNIT_DAY).contains(intervalUnit)) {
            return Result.ofFail(-1, "Invalid intervalUnit: " + intervalUnit);
        }
        entity.setIntervalUnit(intervalUnit);

        // 流控方式 0-快速失败 2-匀速排队
        Integer controlBehavior = reqVo.getControlBehavior();
        if (controlBehavior == null) {
            return Result.ofFail(-1, "controlBehavior can't be null");
        }
        if (!Arrays.asList(CONTROL_BEHAVIOR_DEFAULT, CONTROL_BEHAVIOR_RATE_LIMITER).contains(controlBehavior)) {
            return Result.ofFail(-1, "invalid controlBehavior: " + controlBehavior);
        }
        entity.setControlBehavior(controlBehavior);

        if (CONTROL_BEHAVIOR_DEFAULT == controlBehavior) {
            // 0-快速失败, 则Burst size必填
            Integer burst = reqVo.getBurst();
            if (burst == null) {
                return Result.ofFail(-1, "burst can't be null");
            }
            if (burst < 0) {
                return Result.ofFail(-1, "invalid burst: " + burst);
            }
            entity.setBurst(burst);
        } else if (CONTROL_BEHAVIOR_RATE_LIMITER == controlBehavior) {
            // 1-匀速排队, 则超时时间必填
            Integer maxQueueingTimeoutMs = reqVo.getMaxQueueingTimeoutMs();
            if (maxQueueingTimeoutMs == null) {
                return Result.ofFail(-1, "maxQueueingTimeoutMs can't be null");
            }
            if (maxQueueingTimeoutMs < 0) {
                return Result.ofFail(-1, "invalid maxQueueingTimeoutMs: " + maxQueueingTimeoutMs);
            }
            entity.setMaxQueueingTimeoutMs(maxQueueingTimeoutMs);
        }

        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
            publishRules(app);
        } catch (Throwable throwable) {
            logger.error("add gateway flow rule error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        return Result.ofSuccess(entity);
    }

    @PostMapping("/save.json")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<GatewayFlowRuleEntity> updateFlowRule(@RequestBody UpdateFlowRuleReqVo reqVo) {

        String app = reqVo.getApp();
        if (StringUtil.isBlank(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }

        Long id = reqVo.getId();
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        GatewayFlowRuleEntity entity = repository.findById(id);
        if (entity == null) {
            return Result.ofFail(-1, "gateway flow rule does not exist, id=" + id);
        }

        // 针对请求属性
        GatewayParamFlowItemVo paramItem = reqVo.getParamItem();
        if (paramItem != null) {
            GatewayParamFlowItemEntity itemEntity = new GatewayParamFlowItemEntity();
            entity.setParamItem(itemEntity);

            // 参数属性 0-ClientIP 1-Remote Host 2-Header 3-URL参数 4-Cookie
            Integer parseStrategy = paramItem.getParseStrategy();
            if (!Arrays.asList(PARAM_PARSE_STRATEGY_CLIENT_IP, PARAM_PARSE_STRATEGY_HOST, PARAM_PARSE_STRATEGY_HEADER
                    , PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                return Result.ofFail(-1, "invalid parseStrategy: " + parseStrategy);
            }
            itemEntity.setParseStrategy(paramItem.getParseStrategy());

            // 当参数属性为2-Header 3-URL参数 4-Cookie时，参数名称必填
            if (Arrays.asList(PARAM_PARSE_STRATEGY_HEADER, PARAM_PARSE_STRATEGY_URL_PARAM, PARAM_PARSE_STRATEGY_COOKIE).contains(parseStrategy)) {
                // 参数名称
                String fieldName = paramItem.getFieldName();
                if (StringUtil.isBlank(fieldName)) {
                    return Result.ofFail(-1, "fieldName can't be null or empty");
                }
                itemEntity.setFieldName(paramItem.getFieldName());
            }

            String pattern = paramItem.getPattern();
            // 如果匹配串不为空，验证匹配模式
            if (StringUtil.isNotEmpty(pattern)) {
                itemEntity.setPattern(pattern);
                Integer matchStrategy = paramItem.getMatchStrategy();
                if (!Arrays.asList(PARAM_MATCH_STRATEGY_EXACT, PARAM_MATCH_STRATEGY_CONTAINS, PARAM_MATCH_STRATEGY_REGEX).contains(matchStrategy)) {
                    return Result.ofFail(-1, "invalid matchStrategy: " + matchStrategy);
                }
                itemEntity.setMatchStrategy(matchStrategy);
            }
        } else {
            entity.setParamItem(null);
        }

        // 阈值类型 0-线程数 1-QPS
        Integer grade = reqVo.getGrade();
        if (grade == null) {
            return Result.ofFail(-1, "grade can't be null");
        }
        if (!Arrays.asList(FLOW_GRADE_THREAD, FLOW_GRADE_QPS).contains(grade)) {
            return Result.ofFail(-1, "invalid grade: " + grade);
        }
        entity.setGrade(grade);

        // QPS阈值
        Double count = reqVo.getCount();
        if (count == null) {
            return Result.ofFail(-1, "count can't be null");
        }
        if (count < 0) {
            return Result.ofFail(-1, "count should be at lease zero");
        }
        entity.setCount(count);

        // 间隔
        Long interval = reqVo.getInterval();
        if (interval == null) {
            return Result.ofFail(-1, "interval can't be null");
        }
        if (interval <= 0) {
            return Result.ofFail(-1, "interval should be greater than zero");
        }
        entity.setInterval(interval);

        // 间隔单位
        Integer intervalUnit = reqVo.getIntervalUnit();
        if (intervalUnit == null) {
            return Result.ofFail(-1, "intervalUnit can't be null");
        }
        if (!Arrays.asList(INTERVAL_UNIT_SECOND, INTERVAL_UNIT_MINUTE, INTERVAL_UNIT_HOUR, INTERVAL_UNIT_DAY).contains(intervalUnit)) {
            return Result.ofFail(-1, "Invalid intervalUnit: " + intervalUnit);
        }
        entity.setIntervalUnit(intervalUnit);

        // 流控方式 0-快速失败 2-匀速排队
        Integer controlBehavior = reqVo.getControlBehavior();
        if (controlBehavior == null) {
            return Result.ofFail(-1, "controlBehavior can't be null");
        }
        if (!Arrays.asList(CONTROL_BEHAVIOR_DEFAULT, CONTROL_BEHAVIOR_RATE_LIMITER).contains(controlBehavior)) {
            return Result.ofFail(-1, "invalid controlBehavior: " + controlBehavior);
        }
        entity.setControlBehavior(controlBehavior);

        if (CONTROL_BEHAVIOR_DEFAULT == controlBehavior) {
            // 0-快速失败, 则Burst size必填
            Integer burst = reqVo.getBurst();
            if (burst == null) {
                return Result.ofFail(-1, "burst can't be null");
            }
            if (burst < 0) {
                return Result.ofFail(-1, "invalid burst: " + burst);
            }
            entity.setBurst(burst);
        } else if (CONTROL_BEHAVIOR_RATE_LIMITER == controlBehavior) {
            // 2-匀速排队, 则超时时间必填
            Integer maxQueueingTimeoutMs = reqVo.getMaxQueueingTimeoutMs();
            if (maxQueueingTimeoutMs == null) {
                return Result.ofFail(-1, "maxQueueingTimeoutMs can't be null");
            }
            if (maxQueueingTimeoutMs < 0) {
                return Result.ofFail(-1, "invalid maxQueueingTimeoutMs: " + maxQueueingTimeoutMs);
            }
            entity.setMaxQueueingTimeoutMs(maxQueueingTimeoutMs);
        }

        Date date = new Date();
        entity.setGmtModified(date);

        try {
            entity = repository.save(entity);
            publishRules(app);
        } catch (Throwable throwable) {
            logger.error("update gateway flow rule error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        return Result.ofSuccess(entity);
    }


    @PostMapping("/delete.json")
    @AuthAction(AuthService.PrivilegeType.DELETE_RULE)
    public Result<Long> deleteFlowRule(Long id) {

        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        GatewayFlowRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }

        try {
            repository.delete(id);
            publishRules(oldEntity.getApp());
        } catch (Throwable throwable) {
            logger.error("delete gateway flow rule error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }

        return Result.ofSuccess(id);
    }

    private boolean publishRules(String app, String ip, Integer port) {
        List<GatewayFlowRuleEntity> rules = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.modifyGatewayFlowRules(app, ip, port, rules);
    }

    private void publishRules(/*@NonNull*/ String app) throws Exception {
        List<GatewayFlowRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
}

8.熔断规则持久化改造

 8.1 Nacos操作类-DegradeRuleNacosProvider 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.degrade.DegradeRuleNacosProvider 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.degrade;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.DegradeRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("degradeRuleNacosProvider")
public class DegradeRuleNacosProvider implements DynamicRuleProvider<List<DegradeRuleEntity>> {

    private final NacosSupport nacosSupport;

    public DegradeRuleNacosProvider(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public List<DegradeRuleEntity> getRules(String appName) throws Exception {

        return nacosSupport.getRule(appName, NacosSupport.DEGRADE_DATA_ID_POSTFIX, DegradeRuleEntity.class);
    }
}

8.2 Nacos操作类-DegradeRuleNacosPublisher 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.degrade.DegradeRuleNacosPublisher 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.degrade;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.DegradeRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.util.AssertUtil;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("degradeRuleNacosPublisher")
public class DegradeRuleNacosPublisher implements DynamicRulePublisher<List<DegradeRuleEntity>> {

    private final NacosSupport nacosSupport;

    public DegradeRuleNacosPublisher(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public void publish(String app, List<DegradeRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        nacosSupport.pushRule(app, NacosSupport.DEGRADE_DATA_ID_POSTFIX, rules);
    }
}

8.3 controller改造

包位于 com.alibaba.csp.sentinel.dashboard.controller.DegradeController 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller;

import java.util.Date;
import java.util.List;

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.discovery.AppManagement;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
import com.alibaba.csp.sentinel.dashboard.repository.rule.RuleRepository;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.slots.block.degrade.circuitbreaker.CircuitBreakerStrategy;
import com.alibaba.csp.sentinel.util.StringUtil;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.DegradeRuleEntity;
import com.alibaba.csp.sentinel.dashboard.domain.Result;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * Controller regarding APIs of degrade rules. Refactored since 1.8.0.
 *
 * @author Carpenter Lee
 * @author Eric Zhao
 */
@RestController
@RequestMapping("/degrade")
public class DegradeController {

    private final Logger logger = LoggerFactory.getLogger(DegradeController.class);

    @Autowired
    private RuleRepository<DegradeRuleEntity, Long> repository;
    @Autowired
    @Qualifier("degradeRuleNacosProvider")
    private DynamicRuleProvider<List<DegradeRuleEntity>> ruleProvider;
    @Autowired
    @Qualifier("degradeRuleNacosPublisher")
    private DynamicRulePublisher<List<DegradeRuleEntity>> rulePublisher;

    @Autowired
    private SentinelApiClient sentinelApiClient;
    @Autowired
    private AppManagement appManagement;

    @GetMapping("/rules.json")
    @AuthAction(PrivilegeType.READ_RULE)
    public Result<List<DegradeRuleEntity>> apiQueryMachineRules(String app, String ip, Integer port) {
        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        if (!appManagement.isValidMachineOfApp(app, ip)) {
            return Result.ofFail(-1, "given ip does not belong to given app");
        }
        try {
//            List<DegradeRuleEntity> rules = sentinelApiClient.fetchDegradeRuleOfMachine(app, ip, port);
            List<DegradeRuleEntity> rules = ruleProvider.getRules(app);
            if (rules != null && !rules.isEmpty()) {
                for (DegradeRuleEntity entity : rules) {
                    entity.setApp(app);
                }
            }
            rules = repository.saveAll(rules);
            return Result.ofSuccess(rules);
        } catch (Throwable throwable) {
            logger.error("queryApps error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }
    }

    @PostMapping("/rule")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<DegradeRuleEntity> apiAddRule(@RequestBody DegradeRuleEntity entity) {
        Result<DegradeRuleEntity> checkResult = checkEntityInternal(entity);
        if (checkResult != null) {
            return checkResult;
        }
        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            publishRules(entity.getApp());
        } catch (Throwable t) {
            logger.error("Failed to add new degrade rule, app={}, ip={}", entity.getApp(), entity.getIp(), t);
            return Result.ofThrowable(-1, t);
        }
        return Result.ofSuccess(entity);
    }

    @PutMapping("/rule/{id}")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<DegradeRuleEntity> apiUpdateRule(@PathVariable("id") Long id,
                                                     @RequestBody DegradeRuleEntity entity) {
        if (id == null || id <= 0) {
            return Result.ofFail(-1, "id can't be null or negative");
        }
        DegradeRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofFail(-1, "Degrade rule does not exist, id=" + id);
        }
        entity.setApp(oldEntity.getApp());
        entity.setIp(oldEntity.getIp());
        entity.setPort(oldEntity.getPort());
        entity.setId(oldEntity.getId());
        Result<DegradeRuleEntity> checkResult = checkEntityInternal(entity);
        if (checkResult != null) {
            return checkResult;
        }

        entity.setGmtCreate(oldEntity.getGmtCreate());
        entity.setGmtModified(new Date());
        try {
            entity = repository.save(entity);
            publishRules(entity.getApp());
        } catch (Throwable t) {
            logger.error("Failed to save degrade rule, id={}, rule={}", id, entity, t);
            return Result.ofThrowable(-1, t);
        }
        return Result.ofSuccess(entity);
    }

    @DeleteMapping("/rule/{id}")
    @AuthAction(PrivilegeType.DELETE_RULE)
    public Result<Long> delete(@PathVariable("id") Long id) {
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }

        DegradeRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }

        try {
            repository.delete(id);
            publishRules(oldEntity.getApp());
        } catch (Throwable throwable) {
            logger.error("Failed to delete degrade rule, id={}", id, throwable);
            return Result.ofThrowable(-1, throwable);
        }
        return Result.ofSuccess(id);
    }

    private <R> Result<R> checkEntityInternal(DegradeRuleEntity entity) {
        if (StringUtil.isBlank(entity.getApp())) {
            return Result.ofFail(-1, "app can't be blank");
        }
//        if (StringUtil.isBlank(entity.getIp())) {
//            return Result.ofFail(-1, "ip can't be null or empty");
//        }
//        if (!appManagement.isValidMachineOfApp(entity.getApp(), entity.getIp())) {
//            return Result.ofFail(-1, "given ip does not belong to given app");
//        }
//        if (entity.getPort() == null || entity.getPort() <= 0) {
//            return Result.ofFail(-1, "invalid port: " + entity.getPort());
//        }
        if (StringUtil.isBlank(entity.getLimitApp())) {
            return Result.ofFail(-1, "limitApp can't be null or empty");
        }
        if (StringUtil.isBlank(entity.getResource())) {
            return Result.ofFail(-1, "resource can't be null or empty");
        }
        Double threshold = entity.getCount();
        if (threshold == null || threshold < 0) {
            return Result.ofFail(-1, "invalid threshold: " + threshold);
        }
        Integer recoveryTimeoutSec = entity.getTimeWindow();
        if (recoveryTimeoutSec == null || recoveryTimeoutSec <= 0) {
            return Result.ofFail(-1, "recoveryTimeout should be positive");
        }
        Integer strategy = entity.getGrade();
        if (strategy == null) {
            return Result.ofFail(-1, "circuit breaker strategy cannot be null");
        }
        if (strategy < CircuitBreakerStrategy.SLOW_REQUEST_RATIO.getType()
            || strategy > RuleConstant.DEGRADE_GRADE_EXCEPTION_COUNT) {
            return Result.ofFail(-1, "Invalid circuit breaker strategy: " + strategy);
        }
        if (entity.getMinRequestAmount()  == null || entity.getMinRequestAmount() <= 0) {
            return Result.ofFail(-1, "Invalid minRequestAmount");
        }
        if (entity.getStatIntervalMs() == null || entity.getStatIntervalMs() <= 0) {
            return Result.ofFail(-1, "Invalid statInterval");
        }
        if (strategy == RuleConstant.DEGRADE_GRADE_RT) {
            Double slowRatio = entity.getSlowRatioThreshold();
            if (slowRatio == null) {
                return Result.ofFail(-1, "SlowRatioThreshold is required for slow request ratio strategy");
            } else if (slowRatio < 0 || slowRatio > 1) {
                return Result.ofFail(-1, "SlowRatioThreshold should be in range: [0.0, 1.0]");
            }
        } else if (strategy == RuleConstant.DEGRADE_GRADE_EXCEPTION_RATIO) {
            if (threshold > 1) {
                return Result.ofFail(-1, "Ratio threshold should be in range: [0.0, 1.0]");
            }
        }
        return null;
    }

    private void publishRules(/*@NonNull*/ String app) throws Exception {
        List<DegradeRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
}

9.热点规则持久化改造

 9.1 Nacos操作类-ParamFlowRuleNacosProvider 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.paramflow.ParamFlowRuleNacosProvider 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.paramflow;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.ParamFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRule;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.stream.Collectors;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("paramFlowRuleNacosProvider")
public class ParamFlowRuleNacosProvider implements DynamicRuleProvider<List<ParamFlowRuleEntity>> {

    private final NacosSupport nacosSupport;

    public ParamFlowRuleNacosProvider(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public List<ParamFlowRuleEntity> getRules(String appName) throws Exception {
        return nacosSupport.getRule(appName, NacosSupport.PARAM_FLOW_DATA_ID_POSTFIX, ParamFlowRuleEntity.class);
    }
}

9.2 Nacos操作类-ParamFlowRuleNacosPublisher 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.paramflow.ParamFlowRuleNacosPublisher 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.paramflow;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.ParamFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.util.AssertUtil;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("paramFlowRuleNacosPublisher")
public class ParamFlowRuleNacosPublisher implements DynamicRulePublisher<List<ParamFlowRuleEntity>> {

    private final NacosSupport nacosSupport;

    public ParamFlowRuleNacosPublisher(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public void publish(String app, List<ParamFlowRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        nacosSupport.pushRule(app, NacosSupport.PARAM_FLOW_DATA_ID_POSTFIX, rules);
    }
}

9.3 controller改造

包位于 com.alibaba.csp.sentinel.dashboard.controller.ParamFlowRuleController 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller;

import java.util.Date;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.client.CommandNotFoundException;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.DegradeRuleEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.AppManagement;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.SentinelVersion;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.ParamFlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.domain.Result;
import com.alibaba.csp.sentinel.dashboard.repository.rule.RuleRepository;
import com.alibaba.csp.sentinel.dashboard.util.VersionUtils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Eric Zhao
 * @since 0.2.1
 */
@RestController
@RequestMapping(value = "/paramFlow")
public class ParamFlowRuleController {

    private final Logger logger = LoggerFactory.getLogger(ParamFlowRuleController.class);

    @Autowired
    private SentinelApiClient sentinelApiClient;

    @Autowired
    @Qualifier("paramFlowRuleNacosProvider")
    private DynamicRuleProvider<List<ParamFlowRuleEntity>> ruleProvider;
    @Autowired
    @Qualifier("paramFlowRuleNacosPublisher")
    private DynamicRulePublisher<List<ParamFlowRuleEntity>> rulePublisher;

    @Autowired
    private AppManagement appManagement;
    @Autowired
    private RuleRepository<ParamFlowRuleEntity, Long> repository;

    private boolean checkIfSupported(String app, String ip, int port) {
        try {
            return Optional.ofNullable(appManagement.getDetailApp(app))
                .flatMap(e -> e.getMachine(ip, port))
                .flatMap(m -> VersionUtils.parseVersion(m.getVersion())
                    .map(v -> v.greaterOrEqual(version020)))
                .orElse(true);
            // If error occurred or cannot retrieve machine info, return true.
        } catch (Exception ex) {
            return true;
        }
    }

    @GetMapping("/rules")
    @AuthAction(PrivilegeType.READ_RULE)
    public Result<List<ParamFlowRuleEntity>> apiQueryAllRulesForMachine(@RequestParam String app,
                                                                        @RequestParam String ip,
                                                                        @RequestParam Integer port) {
        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app cannot be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip cannot be null or empty");
        }
        if (port == null || port <= 0) {
            return Result.ofFail(-1, "Invalid parameter: port");
        }
        if (!appManagement.isValidMachineOfApp(app, ip)) {
            return Result.ofFail(-1, "given ip does not belong to given app");
        }
        if (!checkIfSupported(app, ip, port)) {
            return unsupportedVersion();
        }
        try {
//            return sentinelApiClient.fetchParamFlowRulesOfMachine(app, ip, port)
//                .thenApply(repository::saveAll)
//                .thenApply(Result::ofSuccess)
//                .get();

            List<ParamFlowRuleEntity> rules = ruleProvider.getRules(app);
            if (rules != null && !rules.isEmpty()) {
                for (ParamFlowRuleEntity entity : rules) {
                    entity.setApp(app);
                }
            }
            rules = repository.saveAll(rules);
            return Result.ofSuccess(rules);
        } catch (ExecutionException ex) {
            logger.error("Error when querying parameter flow rules", ex.getCause());
            if (isNotSupported(ex.getCause())) {
                return unsupportedVersion();
            } else {
                return Result.ofThrowable(-1, ex.getCause());
            }
        } catch (Throwable throwable) {
            logger.error("Error when querying parameter flow rules", throwable);
            return Result.ofFail(-1, throwable.getMessage());
        }
    }

    private boolean isNotSupported(Throwable ex) {
        return ex instanceof CommandNotFoundException;
    }

    @PostMapping("/rule")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<ParamFlowRuleEntity> apiAddParamFlowRule(@RequestBody ParamFlowRuleEntity entity) {
        Result<ParamFlowRuleEntity> checkResult = checkEntityInternal(entity);
        if (checkResult != null) {
            return checkResult;
        }
        if (!checkIfSupported(entity.getApp(), entity.getIp(), entity.getPort())) {
            return unsupportedVersion();
        }
        entity.setId(null);
        entity.getRule().setResource(entity.getResource().trim());
        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            publishRules(entity.getApp());
            return Result.ofSuccess(entity);
        } catch (ExecutionException ex) {
            logger.error("Error when adding new parameter flow rules", ex.getCause());
            if (isNotSupported(ex.getCause())) {
                return unsupportedVersion();
            } else {
                return Result.ofThrowable(-1, ex.getCause());
            }
        } catch (Throwable throwable) {
            logger.error("Error when adding new parameter flow rules", throwable);
            return Result.ofFail(-1, throwable.getMessage());
        }
    }

    private <R> Result<R> checkEntityInternal(ParamFlowRuleEntity entity) {
        if (entity == null) {
            return Result.ofFail(-1, "bad rule body");
        }
        if (StringUtil.isBlank(entity.getApp())) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
//        if (StringUtil.isBlank(entity.getIp())) {
//            return Result.ofFail(-1, "ip can't be null or empty");
//        }
//        if (entity.getPort() == null || entity.getPort() <= 0) {
//            return Result.ofFail(-1, "port can't be null");
//        }
        if (entity.getRule() == null) {
            return Result.ofFail(-1, "rule can't be null");
        }
        if (StringUtil.isBlank(entity.getResource())) {
            return Result.ofFail(-1, "resource name cannot be null or empty");
        }
        if (entity.getCount() < 0) {
            return Result.ofFail(-1, "count should be valid");
        }
        if (entity.getGrade() != RuleConstant.FLOW_GRADE_QPS) {
            return Result.ofFail(-1, "Unknown mode (blockGrade) for parameter flow control");
        }
        if (entity.getParamIdx() == null || entity.getParamIdx() < 0) {
            return Result.ofFail(-1, "paramIdx should be valid");
        }
        if (entity.getDurationInSec() <= 0) {
            return Result.ofFail(-1, "durationInSec should be valid");
        }
        if (entity.getControlBehavior() < 0) {
            return Result.ofFail(-1, "controlBehavior should be valid");
        }
        return null;
    }

    @PutMapping("/rule/{id}")
    @AuthAction(AuthService.PrivilegeType.WRITE_RULE)
    public Result<ParamFlowRuleEntity> apiUpdateParamFlowRule(@PathVariable("id") Long id,
                                                              @RequestBody ParamFlowRuleEntity entity) {
        if (id == null || id <= 0) {
            return Result.ofFail(-1, "Invalid id");
        }
        ParamFlowRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofFail(-1, "id " + id + " does not exist");
        }

        Result<ParamFlowRuleEntity> checkResult = checkEntityInternal(entity);
        if (checkResult != null) {
            return checkResult;
        }
        if (!checkIfSupported(entity.getApp(), entity.getIp(), entity.getPort())) {
            return unsupportedVersion();
        }
        entity.setId(id);
        Date date = new Date();
        entity.setGmtCreate(oldEntity.getGmtCreate());
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            publishRules(entity.getApp());
            return Result.ofSuccess(entity);
        } catch (ExecutionException ex) {
            logger.error("Error when updating parameter flow rules, id=" + id, ex.getCause());
            if (isNotSupported(ex.getCause())) {
                return unsupportedVersion();
            } else {
                return Result.ofThrowable(-1, ex.getCause());
            }
        } catch (Throwable throwable) {
            logger.error("Error when updating parameter flow rules, id=" + id, throwable);
            return Result.ofFail(-1, throwable.getMessage());
        }
    }

    @DeleteMapping("/rule/{id}")
    @AuthAction(PrivilegeType.DELETE_RULE)
    public Result<Long> apiDeleteRule(@PathVariable("id") Long id) {
        if (id == null) {
            return Result.ofFail(-1, "id cannot be null");
        }
        ParamFlowRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }

        try {
            repository.delete(id);
            publishRules(oldEntity.getApp());
            return Result.ofSuccess(id);
        } catch (ExecutionException ex) {
            logger.error("Error when deleting parameter flow rules", ex.getCause());
            if (isNotSupported(ex.getCause())) {
                return unsupportedVersion();
            } else {
                return Result.ofThrowable(-1, ex.getCause());
            }
        } catch (Throwable throwable) {
            logger.error("Error when deleting parameter flow rules", throwable);
            return Result.ofFail(-1, throwable.getMessage());
        }
    }

    private CompletableFuture<Void> publishRules(String app, String ip, Integer port) {
        List<ParamFlowRuleEntity> rules = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.setParamFlowRuleOfMachine(app, ip, port, rules);
    }

    private <R> Result<R> unsupportedVersion() {
        return Result.ofFail(4041,
            "Sentinel client not supported for parameter flow control (unsupported version or dependency absent)");
    }

    private final SentinelVersion version020 = new SentinelVersion().setMinorVersion(2);

    private void publishRules(/*@NonNull*/ String app) throws Exception {
        List<ParamFlowRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
}

10.系统规则持久化改造

10.1 Nacos操作类-SystemRuleNacosProvider 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.system.SystemRuleNacosProvider 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.system;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.SystemRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("systemRuleNacosProvider")
public class SystemRuleNacosProvider implements DynamicRuleProvider<List<SystemRuleEntity>> {

    private final NacosSupport nacosSupport;

    public SystemRuleNacosProvider(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public List<SystemRuleEntity> getRules(String appName) throws Exception {

        return nacosSupport.getRule(appName, NacosSupport.SYSTEM_DATA_ID_POSTFIX, SystemRuleEntity.class);
    }
}

10.2 Nacos操作类-SystemRuleNacosPublisher 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.system.SystemRuleNacosPublisher 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.system;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.SystemRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.util.AssertUtil;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("systemRuleNacosPublisher")
public class SystemRuleNacosPublisher implements DynamicRulePublisher<List<SystemRuleEntity>> {

    private final NacosSupport nacosSupport;

    public SystemRuleNacosPublisher(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public void publish(String app, List<SystemRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        nacosSupport.pushRule(app, NacosSupport.SYSTEM_DATA_ID_POSTFIX, rules);
    }
}

10.3 controller改造

包位于 com.alibaba.csp.sentinel.dashboard.controller.SystemController 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller;

import java.util.Date;
import java.util.List;

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.DegradeRuleEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.AppManagement;
import com.alibaba.csp.sentinel.dashboard.repository.rule.RuleRepository;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.util.StringUtil;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.SystemRuleEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.domain.Result;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author leyou(lihao)
 */
@RestController
@RequestMapping("/system")
public class SystemController {

    private final Logger logger = LoggerFactory.getLogger(SystemController.class);

    @Autowired
    private RuleRepository<SystemRuleEntity, Long> repository;

    @Autowired
    @Qualifier("systemRuleNacosProvider")
    private DynamicRuleProvider<List<SystemRuleEntity>> ruleProvider;
    @Autowired
    @Qualifier("systemRuleNacosPublisher")
    private DynamicRulePublisher<List<SystemRuleEntity>> rulePublisher;

    @Autowired
    private SentinelApiClient sentinelApiClient;
    @Autowired
    private AppManagement appManagement;

    private <R> Result<R> checkBasicParams(String app, String ip, Integer port) {
        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (port == null) {
            return Result.ofFail(-1, "port can't be null");
        }
        if (!appManagement.isValidMachineOfApp(app, ip)) {
            return Result.ofFail(-1, "given ip does not belong to given app");
        }
        if (port <= 0 || port > 65535) {
            return Result.ofFail(-1, "port should be in (0, 65535)");
        }
        return null;
    }

    @GetMapping("/rules.json")
    @AuthAction(PrivilegeType.READ_RULE)
    public Result<List<SystemRuleEntity>> apiQueryMachineRules(String app, String ip,
                                                               Integer port) {
        Result<List<SystemRuleEntity>> checkResult = checkBasicParams(app, ip, port);
        if (checkResult != null) {
            return checkResult;
        }
        try {
//            List<SystemRuleEntity> rules = sentinelApiClient.fetchSystemRuleOfMachine(app, ip, port);
            List<SystemRuleEntity> rules = ruleProvider.getRules(app);
            if (rules != null && !rules.isEmpty()) {
                for (SystemRuleEntity entity : rules) {
                    entity.setApp(app);
                }
            }
            rules = repository.saveAll(rules);
            return Result.ofSuccess(rules);
        } catch (Throwable throwable) {
            logger.error("Query machine system rules error", throwable);
            return Result.ofThrowable(-1, throwable);
        }
    }

    private int countNotNullAndNotNegative(Number... values) {
        int notNullCount = 0;
        for (int i = 0; i < values.length; i++) {
            if (values[i] != null && values[i].doubleValue() >= 0) {
                notNullCount++;
            }
        }
        return notNullCount;
    }

    @RequestMapping("/new.json")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<SystemRuleEntity> apiAdd(String app, String ip, Integer port,
                                           Double highestSystemLoad, Double highestCpuUsage, Long avgRt,
                                           Long maxThread, Double qps) {

        Result<SystemRuleEntity> checkResult = checkBasicParams(app, ip, port);
        if (checkResult != null) {
            return checkResult;
        }

        int notNullCount = countNotNullAndNotNegative(highestSystemLoad, avgRt, maxThread, qps, highestCpuUsage);
        if (notNullCount != 1) {
            return Result.ofFail(-1, "only one of [highestSystemLoad, avgRt, maxThread, qps,highestCpuUsage] "
                + "value must be set > 0, but " + notNullCount + " values get");
        }
        if (null != highestCpuUsage && highestCpuUsage > 1) {
            return Result.ofFail(-1, "highestCpuUsage must between [0.0, 1.0]");
        }
        SystemRuleEntity entity = new SystemRuleEntity();
        entity.setApp(app.trim());
        entity.setIp(ip.trim());
        entity.setPort(port);
        // -1 is a fake value
        if (null != highestSystemLoad) {
            entity.setHighestSystemLoad(highestSystemLoad);
        } else {
            entity.setHighestSystemLoad(-1D);
        }

        if (null != highestCpuUsage) {
            entity.setHighestCpuUsage(highestCpuUsage);
        } else {
            entity.setHighestCpuUsage(-1D);
        }

        if (avgRt != null) {
            entity.setAvgRt(avgRt);
        } else {
            entity.setAvgRt(-1L);
        }
        if (maxThread != null) {
            entity.setMaxThread(maxThread);
        } else {
            entity.setMaxThread(-1L);
        }
        if (qps != null) {
            entity.setQps(qps);
        } else {
            entity.setQps(-1D);
        }
        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            publishRules(entity.getApp());
        } catch (Throwable throwable) {
            logger.error("Add SystemRule error", throwable);
            return Result.ofThrowable(-1, throwable);
        }
        if (!publishRules(app, ip, port)) {
            logger.warn("Publish system rules fail after rule add");
        }
        return Result.ofSuccess(entity);
    }

    @GetMapping("/save.json")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<SystemRuleEntity> apiUpdateIfNotNull(Long id, String app, Double highestSystemLoad,
            Double highestCpuUsage, Long avgRt, Long maxThread, Double qps) {
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }
        SystemRuleEntity entity = repository.findById(id);
        if (entity == null) {
            return Result.ofFail(-1, "id " + id + " dose not exist");
        }

        if (StringUtil.isNotBlank(app)) {
            entity.setApp(app.trim());
        }
        if (highestSystemLoad != null) {
            if (highestSystemLoad < 0) {
                return Result.ofFail(-1, "highestSystemLoad must >= 0");
            }
            entity.setHighestSystemLoad(highestSystemLoad);
        }
        if (highestCpuUsage != null) {
            if (highestCpuUsage < 0) {
                return Result.ofFail(-1, "highestCpuUsage must >= 0");
            }
            if (highestCpuUsage > 1) {
                return Result.ofFail(-1, "highestCpuUsage must <= 1");
            }
            entity.setHighestCpuUsage(highestCpuUsage);
        }
        if (avgRt != null) {
            if (avgRt < 0) {
                return Result.ofFail(-1, "avgRt must >= 0");
            }
            entity.setAvgRt(avgRt);
        }
        if (maxThread != null) {
            if (maxThread < 0) {
                return Result.ofFail(-1, "maxThread must >= 0");
            }
            entity.setMaxThread(maxThread);
        }
        if (qps != null) {
            if (qps < 0) {
                return Result.ofFail(-1, "qps must >= 0");
            }
            entity.setQps(qps);
        }
        Date date = new Date();
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            publishRules(entity.getApp());
        } catch (Throwable throwable) {
            logger.error("save error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }
        if (!publishRules(entity.getApp(), entity.getIp(), entity.getPort())) {
            logger.info("publish system rules fail after rule update");
        }
        return Result.ofSuccess(entity);
    }

    @RequestMapping("/delete.json")
    @AuthAction(PrivilegeType.DELETE_RULE)
    public Result<?> delete(Long id) {
        if (id == null) {
            return Result.ofFail(-1, "id can't be null");
        }
        SystemRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }
        try {
            repository.delete(id);
            publishRules(oldEntity.getApp());
        } catch (Throwable throwable) {
            logger.error("delete error:", throwable);
            return Result.ofThrowable(-1, throwable);
        }
        if (!publishRules(oldEntity.getApp(), oldEntity.getIp(), oldEntity.getPort())) {
            logger.info("publish system rules fail after rule delete");
        }
        return Result.ofSuccess(id);
    }

    private boolean publishRules(String app, String ip, Integer port) {
        List<SystemRuleEntity> rules = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.setSystemRuleOfMachine(app, ip, port, rules);
    }


    private void publishRules(/*@NonNull*/ String app) throws Exception {
        List<SystemRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
}

11.授权规则持久化改造

11.1 Nacos操作类-AuthorityRuleNacosProvider 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.authority.AuthorityRuleNacosProvider 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.authority;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.AuthorityRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("authorityRuleNacosProvider")
public class AuthorityRuleNacosProvider implements DynamicRuleProvider<List<AuthorityRuleEntity>> {

    private final NacosSupport nacosSupport;

    public AuthorityRuleNacosProvider(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public List<AuthorityRuleEntity> getRules(String appName) throws Exception {

        return nacosSupport.getRule(appName, NacosSupport.AUTHORITY_DATA_ID_POSTFIX, AuthorityRuleEntity.class);
    }
}

11.2 Nacos操作类-AuthorityRuleNacosPublisher 

包位于com.alibaba.csp.sentinel.dashboard.rule.nacos.authority.AuthorityRuleNacosPublisher 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.rule.nacos.authority;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.AuthorityRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosSupport;
import com.alibaba.csp.sentinel.util.AssertUtil;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * 熔断
 * @author Eric Zhao
 * @since 1.4.0
 */
@Component("authorityRuleNacosPublisher")
public class AuthorityRuleNacosPublisher implements DynamicRulePublisher<List<AuthorityRuleEntity>> {

    private final NacosSupport nacosSupport;

    public AuthorityRuleNacosPublisher(NacosSupport nacosSupport) {
        this.nacosSupport = nacosSupport;
    }

    @Override
    public void publish(String app, List<AuthorityRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        nacosSupport.pushRule(app, NacosSupport.AUTHORITY_DATA_ID_POSTFIX, rules);
    }
}

11.3 controller改造

包位于 com.alibaba.csp.sentinel.dashboard.controller.AuthorityRuleController 

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.csp.sentinel.dashboard.controller;

import java.util.Date;
import java.util.List;

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.client.SentinelApiClient;
import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.SystemRuleEntity;
import com.alibaba.csp.sentinel.dashboard.discovery.AppManagement;
import com.alibaba.csp.sentinel.dashboard.discovery.MachineInfo;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.util.StringUtil;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.AuthorityRuleEntity;
import com.alibaba.csp.sentinel.dashboard.domain.Result;
import com.alibaba.csp.sentinel.dashboard.repository.rule.RuleRepository;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author Eric Zhao
 * @since 0.2.1
 */
@RestController
@RequestMapping(value = "/authority")
public class AuthorityRuleController {

    private final Logger logger = LoggerFactory.getLogger(AuthorityRuleController.class);

    @Autowired
    private SentinelApiClient sentinelApiClient;

    @Autowired
    @Qualifier("authorityRuleNacosProvider")
    private DynamicRuleProvider<List<AuthorityRuleEntity>> ruleProvider;

    @Autowired
    @Qualifier("authorityRuleNacosPublisher")
    private DynamicRulePublisher<List<AuthorityRuleEntity>> rulePublisher;

    @Autowired
    private RuleRepository<AuthorityRuleEntity, Long> repository;
    @Autowired
    private AppManagement appManagement;

    @GetMapping("/rules")
    @AuthAction(PrivilegeType.READ_RULE)
    public Result<List<AuthorityRuleEntity>> apiQueryAllRulesForMachine(@RequestParam String app,
                                                                        @RequestParam String ip,
                                                                        @RequestParam Integer port) {
        if (StringUtil.isEmpty(app)) {
            return Result.ofFail(-1, "app cannot be null or empty");
        }
        if (StringUtil.isEmpty(ip)) {
            return Result.ofFail(-1, "ip cannot be null or empty");
        }
        if (port == null || port <= 0) {
            return Result.ofFail(-1, "Invalid parameter: port");
        }
        if (!appManagement.isValidMachineOfApp(app, ip)) {
            return Result.ofFail(-1, "given ip does not belong to given app");
        }
        try {
//            List<AuthorityRuleEntity> rules = sentinelApiClient.fetchAuthorityRulesOfMachine(app, ip, port);
            List<AuthorityRuleEntity> rules = ruleProvider.getRules(app);
            if (rules != null && !rules.isEmpty()) {
                for (AuthorityRuleEntity entity : rules) {
                    entity.setApp(app);
                }
            }
            rules = repository.saveAll(rules);
            return Result.ofSuccess(rules);
        } catch (Throwable throwable) {
            logger.error("Error when querying authority rules", throwable);
            return Result.ofFail(-1, throwable.getMessage());
        }
    }

    private <R> Result<R> checkEntityInternal(AuthorityRuleEntity entity) {
        if (entity == null) {
            return Result.ofFail(-1, "bad rule body");
        }
        if (StringUtil.isBlank(entity.getApp())) {
            return Result.ofFail(-1, "app can't be null or empty");
        }
        if (StringUtil.isBlank(entity.getIp())) {
            return Result.ofFail(-1, "ip can't be null or empty");
        }
        if (entity.getPort() == null || entity.getPort() <= 0) {
            return Result.ofFail(-1, "port can't be null");
        }
        if (entity.getRule() == null) {
            return Result.ofFail(-1, "rule can't be null");
        }
        if (StringUtil.isBlank(entity.getResource())) {
            return Result.ofFail(-1, "resource name cannot be null or empty");
        }
        if (StringUtil.isBlank(entity.getLimitApp())) {
            return Result.ofFail(-1, "limitApp should be valid");
        }
        if (entity.getStrategy() != RuleConstant.AUTHORITY_WHITE
            && entity.getStrategy() != RuleConstant.AUTHORITY_BLACK) {
            return Result.ofFail(-1, "Unknown strategy (must be blacklist or whitelist)");
        }
        return null;
    }

    @PostMapping("/rule")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<AuthorityRuleEntity> apiAddAuthorityRule(@RequestBody AuthorityRuleEntity entity) {
        Result<AuthorityRuleEntity> checkResult = checkEntityInternal(entity);
        if (checkResult != null) {
            return checkResult;
        }
        entity.setId(null);
        Date date = new Date();
        entity.setGmtCreate(date);
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            publishRules(entity.getApp());
        } catch (Throwable throwable) {
            logger.error("Failed to add authority rule", throwable);
            return Result.ofThrowable(-1, throwable);
        }
        if (!publishRules(entity.getApp(), entity.getIp(), entity.getPort())) {
            logger.info("Publish authority rules failed after rule add");
        }
        return Result.ofSuccess(entity);
    }

    @PutMapping("/rule/{id}")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<AuthorityRuleEntity> apiUpdateParamFlowRule(@PathVariable("id") Long id,
                                                              @RequestBody AuthorityRuleEntity entity) {
        if (id == null || id <= 0) {
            return Result.ofFail(-1, "Invalid id");
        }
        Result<AuthorityRuleEntity> checkResult = checkEntityInternal(entity);
        if (checkResult != null) {
            return checkResult;
        }
        entity.setId(id);
        Date date = new Date();
        entity.setGmtCreate(null);
        entity.setGmtModified(date);
        try {
            entity = repository.save(entity);
            if (entity == null) {
                return Result.ofFail(-1, "Failed to save authority rule");
            }
            publishRules(entity.getApp());
        } catch (Throwable throwable) {
            logger.error("Failed to save authority rule", throwable);
            return Result.ofThrowable(-1, throwable);
        }
        if (!publishRules(entity.getApp(), entity.getIp(), entity.getPort())) {
            logger.info("Publish authority rules failed after rule update");
        }
        return Result.ofSuccess(entity);
    }

    @DeleteMapping("/rule/{id}")
    @AuthAction(PrivilegeType.DELETE_RULE)
    public Result<Long> apiDeleteRule(@PathVariable("id") Long id) {
        if (id == null) {
            return Result.ofFail(-1, "id cannot be null");
        }
        AuthorityRuleEntity oldEntity = repository.findById(id);
        if (oldEntity == null) {
            return Result.ofSuccess(null);
        }
        try {
            repository.delete(id);
            publishRules(oldEntity.getApp());
        } catch (Exception e) {
            return Result.ofFail(-1, e.getMessage());
        }
        if (!publishRules(oldEntity.getApp(), oldEntity.getIp(), oldEntity.getPort())) {
            logger.error("Publish authority rules failed after rule delete");
        }
        return Result.ofSuccess(id);
    }

    private boolean publishRules(String app, String ip, Integer port) {
        List<AuthorityRuleEntity> rules = repository.findAllByMachine(MachineInfo.of(app, ip, port));
        return sentinelApiClient.setAuthorityRuleOfMachine(app, ip, port, rules);
    }

    private void publishRules(/*@NonNull*/ String app) throws Exception {
        List<AuthorityRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
}

至此，Sentinel以及改造完成，在Sentinel中创建的规则就可以同步到Nacos中