spring cloud: 微服务环境搭建（alibaba）增强持久化

泥人暖风
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紧跟着 spring cloud: 微服务环境搭建（alibaba）增强（限流、降级、熔断）规则配置后， 开始对这部分进行规则持久化。

参考官方

1. 规则管理及推送

一般来说，规则的推送由下面三种模式：

推送模式说明优点缺点
原始模式API 将规则推送至客户端并直接更新到内存中，扩展写数据源（WritableDataSource）简单，无任何依赖不保证一致性；规则保存在内存中，重启即消失。非常不建议用于生产环境
Pull 模式扩展写数据源（WritableDataSource）， 客户端主动向某个规则管理中心定期轮询拉取规则，这个规则中心可以是 RDBMS、文件 等简单，无任何依赖；规则持久化不保证一致性；实时性不保证，拉取过于频繁也可能会有性能问题。
Push 模式扩展读数据源（ReadableDataSource），规则中心统一推送，客户端通过注册监听器的方式时刻监听变化，比如使用 Nacos、Zookeeper 等配置中心。这种方式有更好的实时性和一致性保证。生产环境下一般采用 push 模式的数据源。规则持久化；一致性；快速引入第三方依赖

2. 原始模式

如果不做任何修改，Dashboard的推送规则方式是通过API将规则推送至客户端并直接更新到内存中，示意图如下：

image.png

这种做法的好处是简单，无依赖；坏处是应用重启规则就会消失，仅用于简单测试，不能用于生产环境。 前面实验的就是此模式。

3.Pull拉模式

Pull拉模式的数据源（如本地文件、RDBMS等）一般是可写入的。使用时需要在客户端注册数据源： 将对应的读数据源注册至对应的RuleManager，将写数据源注册至transport的WritableDataSourceRegistry中。以本地文件数据源为例：

本地文件数据源会定时轮询文件的变更，读取规则。这样我们既可以在应用本地直接修改文件来更新规则，也可以通过Sentinel控制台推送规则。以本地文件数据源为例，推送过程如下图所示：

image.png

这种实现方法好处是简单，不引入新的依赖，坏处是无法保证监控数据的一致性。

  • 步骤1：添加配置

temp-gateway工程

    <dependency>
        <groupId>com.alibaba.csp</groupId>
        <artifactId>sentinel-datasource-extension</artifactId>
    </dependency>
  • 步骤2：编写持久化代码实现 com.alibaba.csp.sentinel.init.InitFunc

FileDataSourceInit.java

package com.temp.conf;
import com.alibaba.csp.sentinel.command.handler.ModifyParamFlowRulesCommandHandler;
import com.alibaba.csp.sentinel.datasource.*;
import com.alibaba.csp.sentinel.init.InitFunc;
import com.alibaba.csp.sentinel.slots.block.authority.AuthorityRule;
import com.alibaba.csp.sentinel.slots.block.authority.AuthorityRuleManager;
import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRule;
import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRuleManager;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRule;
import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRuleManager;
import com.alibaba.csp.sentinel.slots.system.SystemRule;
import com.alibaba.csp.sentinel.slots.system.SystemRuleManager;
import com.alibaba.csp.sentinel.transport.util.WritableDataSourceRegistry;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import org.springframework.stereotype.Component;

import java.io.File;
import java.io.IOException;
import java.util.List;

/**
 * 自定义哨兵存储文件数据源加载类
 */
@Component
public class FileDataSourceInit implements InitFunc {
	@Override
	public void init() throws Exception {
		// TIPS: 如果你不喜欢这个路径，你可以把它改成你喜欢的路径。
		String ruleDir = System.getProperty("user.home") + "/sentinel/rules";
		String flowRulePath = ruleDir + "/flow-rule.json";
		String degradeRulePath = ruleDir + "/degrade-rule.json";
		String systemRulePath = ruleDir + "/system-rule.json";
		String authorityRulePath = ruleDir + "/authority-rule.json";
		String hotParamFlowRulePath = ruleDir + "/param-flow-rule.json";

		this.mkdirIfNotExits(ruleDir);
		this.createFileIfNotExits(flowRulePath);
		this.createFileIfNotExits(degradeRulePath);
		this.createFileIfNotExits(systemRulePath);
		this.createFileIfNotExits(authorityRulePath);
		this.createFileIfNotExits(hotParamFlowRulePath);
		// 流量控制规则
		ReadableDataSource<String, List<FlowRule>> flowRuleRDS = new FileRefreshableDataSource<>(
				flowRulePath,
				flowRuleListParser
		);
		// 将可读数据源注册到 FlowRule Manager
		// 这样，当规则文件发生变化时，规则就会更新到内存中。
		FlowRuleManager.register2Property(flowRuleRDS.getProperty());

		WritableDataSource<List<FlowRule>> flowRuleWDS = new FileWritableDataSource<>(
				flowRulePath,
				this::encodeJson
		);
		// 在传输模块中注册可写数据源注册表
		// 这样，Sentinel 将规则更新到内存中，然后在收到控制台推送的规则时将它们写入文件。
		WritableDataSourceRegistry.registerFlowDataSource(flowRuleWDS);

		// 降级规则
		ReadableDataSource<String, List<DegradeRule>> degradeRuleRDS = new FileRefreshableDataSource<>(
				degradeRulePath,
				degradeRuleListParser
		);
		DegradeRuleManager.register2Property(degradeRuleRDS.getProperty());
		WritableDataSource<List<DegradeRule>> degradeRuleWDS = new FileWritableDataSource<>(
				degradeRulePath,
				this::encodeJson
		);
		WritableDataSourceRegistry.registerDegradeDataSource(degradeRuleWDS);

		// System Rules
		ReadableDataSource<String, List<SystemRule>> systemRuleRDS = new FileRefreshableDataSource<>(
				systemRulePath,
				systemRuleListParser
		);
		SystemRuleManager.register2Property(systemRuleRDS.getProperty());
		WritableDataSource<List<SystemRule>> systemRuleWDS = new FileWritableDataSource<>(
				systemRulePath,
				this::encodeJson
		);
		WritableDataSourceRegistry.registerSystemDataSource(systemRuleWDS);

		// Authorization rules
		ReadableDataSource<String, List<AuthorityRule>> authorityRuleRDS = new FileRefreshableDataSource<>(
				flowRulePath,
				authorityRuleListParser
		);
		AuthorityRuleManager.register2Property(authorityRuleRDS.getProperty());
		WritableDataSource<List<AuthorityRule>> authorityRuleWDS = new FileWritableDataSource<>(
				authorityRulePath,
				this::encodeJson
		);
		WritableDataSourceRegistry.registerAuthorityDataSource(authorityRuleWDS);

		// Hot spot parameter rule
		ReadableDataSource<String, List<ParamFlowRule>> hotParamFlowRuleRDS = new FileRefreshableDataSource<>(
				hotParamFlowRulePath,
				hotParamFlowRuleListParser
		);
		ParamFlowRuleManager.register2Property(hotParamFlowRuleRDS.getProperty());
		WritableDataSource<List<ParamFlowRule>> paramFlowRuleWDS = new FileWritableDataSource<>(
				hotParamFlowRulePath,
				this::encodeJson
		);
		ModifyParamFlowRulesCommandHandler.setWritableDataSource(paramFlowRuleWDS);
	}

	/**
	 * Object Conversion of Flow Control Rules
	 */
	private Converter<String, List<FlowRule>> flowRuleListParser = source -> JSON.parseObject(
			source,
			new TypeReference<List<FlowRule>>() {
			}
	);
	/**
	 * Degradation Rule Object Conversion
	 */
	private Converter<String, List<DegradeRule>> degradeRuleListParser = source -> JSON.parseObject(
			source,
			new TypeReference<List<DegradeRule>>() {
			}
	);
	/**
	 * System Rule Object Conversion
	 */
	private Converter<String, List<SystemRule>> systemRuleListParser = source -> JSON.parseObject(
			source,
			new TypeReference<List<SystemRule>>() {
			}
	);

	/**
	 * Authorization Rule Object Conversion
	 */
	private Converter<String, List<AuthorityRule>> authorityRuleListParser = source -> JSON.parseObject(
			source,
			new TypeReference<List<AuthorityRule>>() {
			}
	);

	/**
	 * Hot Rule Object Conversion
	 */
	private Converter<String, List<ParamFlowRule>> hotParamFlowRuleListParser = source -> JSON.parseObject(
			source,
			new TypeReference<List<ParamFlowRule>>() {
			}
	);

	/**
	 * Create directories
	 *
	 * @param filePath
	 */
	private void mkdirIfNotExits(String filePath) {
		File file = new File(filePath);
		if (!file.exists()) {
			file.mkdirs();
		}
	}

	/**
	 * create a file
	 *
	 * @param filePath
	 * @throws IOException
	 */
	private void createFileIfNotExits(String filePath) throws IOException {
		File file = new File(filePath);
		if (!file.exists()) {
			file.createNewFile();
		}
	}

	private <T> String encodeJson(T t) {
		return JSON.toJSONString(t);
	}
}
  • 步骤3：添加配置 在resources下创建配置目录 META-INF/services , 然后添加文件 com.alibaba.csp.sentinel.init.InitFunc

然后在此文件中，添加刚才的配置文件全路径

com.temp.conf.FilePersistence

重新启动service-gateway后，就可在user目录发现json文件群

image.png 注意这里会发现，文件size都是0KB

  • 步骤4：修改"/flow-rule.json" flow-rule.json
[
  {
    "resource": "item_route",
    "count": 1.0,
    "intervalSec": 3
  }
]

此时发现，虽然控制台的规则并未显示，但执行响应API限流已经生效

image.png

4. Push推模式

生产环境下，一般更常用的是Push推模式的数据源。对于Push推模式的数据源，如远程配置中心（ZooKeeper，Nocos，Apollo等等），推送的操作不应该有Sentinel客户端进行；而应该经控制台统一进行管理，直接进行推送，数据源仅负责获取配置中心推送的配置并更新至本地。因此推送规则正确做法应该是 配置中心控制台/Sentinel 控制中心--》配置中心--》Sentinel数据源--》Sentinel，而不是经Sentinel数据源推送至配置中心。这样的流程就非常清晰了。

image.png

默认情况下，当我们在Sentinel控制台中配置规则时，控制台推送规则方式是通过API将规则推送至客户端并直接更新到内存中。一旦我们重启应用，规则将消失。下面我们介绍下如何将配置规则进行持久化，以存储到Nacos为例。

  • 将规则推送到Nacos或其他远程配置中心
  • Sentinel客户端链接Nacos，获取规则配置；并监听Nacos配置变化，如发生变化，就更新本地缓存（从而让本地缓存总是和Nacos一致）

控制台监听Nacos配置变化，如发生变化就更新本地缓存（从而让控制台本地缓存总是和Nacos一致）

生产环境下一般采用push（推）模式的数据源。 删除META-INF/services/com.alibaba.csp.sentinel.init.InitFunc 的内容

5. 针对推荐Push模式改造实现持久化

5.1. 下载Sentinel 1.8.1 源码

下载：github.com/alibaba/Sen…

解压后在idea打开，更新maven依赖，得到工程文件，sentinel-dashboard模块是此次的主角，我们的改造都是在这个模块内进行的。

image.png

5.2 修改pom.xml

打开sentinel-dashboard模块的pom.xml文件，找到sentinel-datasource-nacos依赖，把test去掉：

image.png

5.3 拷贝限流规则示例代码

把src/test/java/com/alibaba/csp/sentinel/dashboard/rule/nacos文件夹拷贝到src/main/java/com/alibaba/csp/sentinel/dashboard/rule目录下：

image.png

↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓

image.png

5.4 连接到Nacos

5.4.1 打开application.properties文件，添加Nacos相关配置。

#spring settings
spring.http.encoding.force=true
spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true

#cookie name setting
server.servlet.session.cookie.name=sentinel_dashboard_cookie

#logging settings
logging.level.org.springframework.web=INFO
logging.file=${user.home}/logs/csp/sentinel-dashboard.log
logging.pattern.file= %d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n
#logging.pattern.console= %d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n

#auth settings
auth.filter.exclude-urls=/,/auth/login,/auth/logout,/registry/machine,/version
auth.filter.exclude-url-suffixes=htm,html,js,css,map,ico,ttf,woff,png
# If auth.enabled=false, Sentinel console disable login
auth.username=sentinel
auth.password=sentinel

# Inject the dashboard version. It's required to enable
# filtering in pom.xml for this resource file.
sentinel.dashboard.version=${project.version}
# Nacos相关配置
nacos.address=localhost:8848
# 如果要指定namespace就填入，不填（默认是public，groupId默认值SENTINEL_GROUP）
nacos.namespace=dev
# 如果Nacos开启了鉴权，添加用户名/密码
nacos.username=nacos
nacos.password=nacos

5.4.2 打开com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfig类，引入刚刚填写的配置信息，如果Nacos没有开启鉴权则不需要username和password。

NacosConfig.java

/*
 * 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;

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.Value;
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 {

    /**
     * Nacos控制台地址
     */
    @Value("${nacos.address}")
    private String address;
    /**
     * Nacos命名空间
     */
    @Value("${nacos.namespace}")
    private String namespace;
    /**
     * Nacos鉴权用户名
     */
    @Value("${nacos.username}")
    private String username;
    /**
     * Nacos鉴权密码
     */
    @Value("${nacos.password}")
    private String password;
    @Bean
    public Converter<List<FlowRuleEntity>, String> flowRuleEntityEncoder() {
        return JSON::toJSONString;
    }

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

    /**
     * 改造Nacos配置
     * @return
     * @throws Exception
     */
    @Bean
    public ConfigService nacosConfigService() throws Exception {
//        return ConfigFactory.createConfigService("localhost");
        Properties properties = new Properties();
        properties.put(PropertyKeyConst.SERVER_ADDR,address);
        properties.put(PropertyKeyConst.NAMESPACE,namespace);
        properties.put(PropertyKeyConst.USERNAME,username);
        properties.put(PropertyKeyConst.PASSWORD,password);
        return ConfigFactory.createConfigService(properties);
    }
}

5.4.3 修改流控规则注入的bean

打开com.alibaba.csp.sentinel.dashboard.controller.v2.FlowControllerV2类，注入我们刚刚的限流规则类。 FlowControllerV2.java

/*
 * 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.v2;

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

import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService;
import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
import com.alibaba.csp.sentinel.util.StringUtil;

import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.repository.rule.InMemoryRuleRepositoryAdapter;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
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.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * Flow rule controller (v2).
 *
 * @author Eric Zhao
 * @since 1.4.0
 */
@RestController
@RequestMapping(value = "/v2/flow")
public class FlowControllerV2 {

    private final Logger logger = LoggerFactory.getLogger(FlowControllerV2.class);

    @Autowired
    private InMemoryRuleRepositoryAdapter<FlowRuleEntity> repository;

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

....

image.png

5.4.4 修改静态文件

  • 打开src/main/webapp/resources/app/scripts/directives/sidebar/sidebar.html，找到dashboard.flowV1({app: entry.app})修改为dashboard.flow({app: entry.app})。

image.png

image.png

  • 打开src/main/webapp/resources/app/scripts/controllers/identity.js，把FlowServiceV1改为FlowServiceV2。

image.png

image.png

5.5 启动测试

至此控制台的限流规则部分已经改造完成，IDEA内直接启动DashboardApplication类试试效果，再启动一个微服务连接到sentinel，访问一次微服务接口让sentinel控制台检测到路径。在控制台点击流控规则，右上角随便新增个限流规则，检查下Nacos中是否生成对应的配置文件即可。

打包好的sentinel-dashboard.jar，拷贝到/run_env/，并启动start_sentinel.bat

5.5.1 Sentinel控制台添加规则--》查看Nacos配置

此时，可能会出现问题 Q1: java.net.ConnectException: Connection refused: no further information

A1：需要查看机器列表的IP地址 image.png

在此卡壳了，怎么都出不来。关电脑，睡觉。 过了一晚上，启动电脑，奇妙的事情发生了。

Q2: 画面样式也会有所不同，需要确认

v1布局 image.png v2布局-查看项目数

追加新流控--》 image.png

立马在Nacos查看

image.png

进入编辑详细查看（意外发生了）：

image.png

接着修改成json，把数据改改看能不能反映到Sentinel Dashboard上去。

image.png

改两处，查看Sentinel Dashboard变化。 image.png

限流实验：

image.png

小结：由此看出，流控规则持久化成功。

5.6 改造其他规则

5.6.1 设定配置文件

打开com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil类，添加规则配置文件后缀。

NacosConfigUtil.java追加部分

//↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓add new rule postfix ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
    public static final String DEGRADE_DATA_ID_POSTFIX = "-degrade-rules";
    public static final String SYSTEM_DATA_ID_POSTFIX = "-system-rules";
    public static final String AUTHORITY_DATA_ID_POSTFIX = "-authority-rules";
//↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

5.6.2 添加规则推送类

为方便区分，在nacos建了多几个文件夹。分别是：

  • authority（授权规则）
  • degrade（降级规则）
  • flow（流控规则）
  • param（热点规则）
  • system（系统规则）

并把前面的限流规则移入对应的文件夹。 直接把FlowRuleNacosProvider和FlowRuleNacosPublisher复制一份到degrade目录下，把Flow相关的类都改为Degrade的。依次修改：

5.6.2.1 authority/推送类

AuthorityRuleNacosProvider.java

/*
 * 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.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<String, List<AuthorityRuleEntity>> converter;

    @Override
    public List<AuthorityRuleEntity> getRules(String appName) throws Exception {
        String rules = configService.getConfig(appName + NacosConfigUtil.AUTHORITY_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(rules);
    }
}

AuthorityRuleNacosPublisher.java

/*
 * 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.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.AssertUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<AuthorityRuleEntity>, String> converter;

    @Override
    public void publish(String app, List<AuthorityRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        configService.publishConfig(app + NacosConfigUtil.AUTHORITY_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, converter.convert(rules));
    }
}

5.6.2.2 degrade/推送类

DegradeRuleNacosProvider.java

/*
 * 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.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<String, List<DegradeRuleEntity>> converter;

    @Override
    public List<DegradeRuleEntity> getRules(String appName) throws Exception {
        String rules = configService.getConfig(appName + NacosConfigUtil.DEGRADE_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(rules);
    }
}

DegradeRuleNacosPublisher.java

/*
 * 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.datasource.entity.rule.FlowRuleEntity;
import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.AssertUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<DegradeRuleEntity>, String> converter;

    @Override
    public void publish(String app, List<DegradeRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        configService.publishConfig(app + NacosConfigUtil.DEGRADE_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, converter.convert(rules));
    }
}

5.6.2.3 flow/推送类

FlowRuleNacosProvider.java

/*
 * 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.DynamicRuleProvider;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<String, List<FlowRuleEntity>> converter;

    @Override
    public List<FlowRuleEntity> getRules(String appName) throws Exception {
        String rules = configService.getConfig(appName + NacosConfigUtil.FLOW_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(rules);
    }
}

FlowRuleNacosPublisher.java

/*
 * 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.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.AssertUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<FlowRuleEntity>, String> converter;

    @Override
    public void publish(String app, List<FlowRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        configService.publishConfig(app + NacosConfigUtil.FLOW_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, converter.convert(rules));
    }
}

5.6.2.4 param/推送类

ParamFlowRuleNacosProvider.java

/*
 * 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.param;

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.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<String, List<ParamFlowRuleEntity>> converter;

    @Override
    public List<ParamFlowRuleEntity> getRules(String appName) throws Exception {
        String rules = configService.getConfig(appName + NacosConfigUtil.PARAM_FLOW_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(rules);
    }
}

ParamFlowRuleNacosPublisher.java

/*
 * 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.param;

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.DynamicRulePublisher;
import com.alibaba.csp.sentinel.dashboard.rule.nacos.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.AssertUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<ParamFlowRuleEntity>, String> converter;

    @Override
    public void publish(String app, List<ParamFlowRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        configService.publishConfig(app + NacosConfigUtil.PARAM_FLOW_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, converter.convert(rules));
    }
}

5.6.2.5 system/推送类

SystemRuleNacosProvider.java

/*
 * 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.ParamFlowRuleEntity;
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.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.StringUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

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

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<String, List<SystemRuleEntity>> converter;

    @Override
    public List<SystemRuleEntity> getRules(String appName) throws Exception {
        String rules = configService.getConfig(appName + NacosConfigUtil.SYSTEM_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(rules);
    }
}

SystemRuleNacosPublisher.java

/*
 * 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.ParamFlowRuleEntity;
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.NacosConfigUtil;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.util.AssertUtil;
import com.alibaba.nacos.api.config.ConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

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

    @Autowired
    private ConfigService configService;
    @Autowired
    private Converter<List<SystemRuleEntity>, String> converter;

    @Override
    public void publish(String app, List<SystemRuleEntity> rules) throws Exception {
        AssertUtil.notEmpty(app, "app name cannot be empty");
        if (rules == null) {
            return;
        }
        configService.publishConfig(app + NacosConfigUtil.SYSTEM_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, converter.convert(rules));
    }
}

5.6.3 NacosConfig添加规则转换

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

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

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

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

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

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

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

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

5.6.4 修改降级规则控制器

com.alibaba.csp.sentinel.dashboard.controller.DegradeController替换为以下内容： DegradeController.java

/*
 * 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.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;
    //↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓修改开始↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
//    @Autowired
//    private SentinelApiClient sentinelApiClient;
    @Autowired
    @Qualifier("degradeRuleNacosProvider")
    private DynamicRuleProvider<List<DegradeRuleEntity>> ruleProvider;
    @Autowired
    @Qualifier("degradeRuleNacosPublisher")
    private DynamicRulePublisher<List<DegradeRuleEntity>> rulePublisher;
    //↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑修改结束↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
    @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");
        }
        try {
            //↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓修改开始↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
//            List<DegradeRuleEntity> rules = sentinelApiClient.fetchDegradeRuleOfMachine(app, ip, port);
            List<DegradeRuleEntity> rules = ruleProvider.getRules(app);
            //↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑修改结束↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
            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) throws Exception {
        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);
        } catch (Throwable t) {
            logger.error("Failed to add new degrade rule, app={}, ip={}", entity.getApp(), entity.getIp(), t);
            return Result.ofThrowable(-1, t);
        }
        //↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓修改开始↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
//        if (!publishRules(entity.getApp(), entity.getIp(), entity.getPort())) {
//            logger.warn("Publish degrade rules failed, app={}", entity.getApp());
//        }
        //↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑修改结束↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
        publishRules(entity.getApp());
        return Result.ofSuccess(entity);
    }

    @PutMapping("/rule/{id}")
    @AuthAction(PrivilegeType.WRITE_RULE)
    public Result<DegradeRuleEntity> apiUpdateRule(@PathVariable("id") Long id,
                                                     @RequestBody DegradeRuleEntity entity) throws Exception {
        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);
        } catch (Throwable t) {
            logger.error("Failed to save degrade rule, id={}, rule={}", id, entity, t);
            return Result.ofThrowable(-1, t);
        }
        //↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓修改开始↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
//        if (!publishRules(entity.getApp(), entity.getIp(), entity.getPort())) {
//            logger.warn("Publish degrade rules failed, app={}", entity.getApp());
//        }
        publishRules(entity.getApp());
        //↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑修改结束↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
        return Result.ofSuccess(entity);
    }

    @DeleteMapping("/rule/{id}")
    @AuthAction(PrivilegeType.DELETE_RULE)
    public Result<Long> delete(@PathVariable("id") Long id) throws Exception {
        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);
        } catch (Throwable throwable) {
            logger.error("Failed to delete degrade rule, id={}", id, throwable);
            return Result.ofThrowable(-1, throwable);
        }
        //↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓修改开始↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
        //↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑修改结束↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
//        if (!publishRules(oldEntity.getApp(), oldEntity.getIp(), oldEntity.getPort())) {
//            logger.warn("Publish degrade rules failed, app={}", oldEntity.getApp());
//        }
        publishRules(oldEntity.getApp());
        return Result.ofSuccess(id);
    }
    //↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓修改开始↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
//    private boolean publishRules(String app, String ip, Integer port) {
//        List<DegradeRuleEntity> rules = repository.findAllByMachine(MachineInfo.of(app, ip, port));
//        return sentinelApiClient.setDegradeRuleOfMachine(app, ip, port, rules);
//    }
    private void publishRules(String app) throws Exception {
        List<DegradeRuleEntity> rules = repository.findAllByApp(app);
        rulePublisher.publish(app, rules);
    }
    //↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑修改结束↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑


    private <R> Result<R> checkEntityInternal(DegradeRuleEntity entity) {
        if (StringUtil.isBlank(entity.getApp())) {
            return Result.ofFail(-1, "app can't be blank");
        }
        //↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓修改开始↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
//        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, "invalid port: " + entity.getPort());
//        }
        //↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑修改结束↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
        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;
    }
}

5.6.5 修改授权规则控制器

com.alibaba.csp.sentinel.dashboard.controller.AuthorityRuleController替换为以下内容： AuthorityRuleController.java参考修改降级规则控制器

5.6.6 修改热点规则控制器

com.alibaba.csp.sentinel.dashboard.controller.ParamFlowRuleController替换为以下内容： ParamFlowRuleController.java参考修改降级规则控制器

5.6.7 修改系统规则控制器

com.alibaba.csp.sentinel.dashboard.controller.SystemController替换为以下内容： SystemController.java参考修改降级规则控制器

5.7 测试

Sentinel一侧追加个降级规则： image.png

image.png

Nacos一侧查看是否出现： image.png

代码：gitee.com/actual-comb…

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