sentinel实现控制台与nacos数据双向绑定

有两种方式可以实现：

• Springboot客户端做相应配置（推荐）

• 修改sentinel-dashboard的源码

一、Springboot客户端做相应配置（推荐）

1、添加依赖

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

这里面已经实现了从nacos读取配置的方法，我们只需实现写入的方法即可

2、新建NacosWritableDataSource

利用 nacos 的 com.alibaba.nacos.api.config.ConfigService#publishConfig(java.lang.String, java.lang.String, java.lang.String) 方法，既会修改持久化文件，也会同步到对应的微服务

@Slf4j
public class NacosWritableDataSource<T> implements WritableDataSource<T> {

    private NacosDataSourceProperties nacosDataSourceProperties;

    private ConfigService configService;

    private final Converter<T, String> configEncoder;

    private final Lock lock = new ReentrantLock(true);

    public NacosWritableDataSource(NacosDataSourceProperties nacosDataSourceProperties,
        Converter<T, String> configEncoder) {
        this.nacosDataSourceProperties = nacosDataSourceProperties;
        this.configEncoder = configEncoder;
        // 初始化 nacos configService
        initConfigService();
    }

    private void initConfigService() {
        try {
            this.configService = NacosFactory.createConfigService(buildProperties(nacosDataSourceProperties));
        } catch (NacosException e) {
            log.error("init nacos configService error", e);
        }
    }

    private Properties buildProperties(NacosDataSourceProperties nacosDataSourceProperties) {
        Properties properties = new Properties();
        if (StringUtils.hasLength(nacosDataSourceProperties.getServerAddr())) {
            properties.setProperty(PropertyKeyConst.SERVER_ADDR, nacosDataSourceProperties.getServerAddr());
        } else {
            properties.setProperty(PropertyKeyConst.ACCESS_KEY, nacosDataSourceProperties.getAccessKey());
            properties.setProperty(PropertyKeyConst.SECRET_KEY, nacosDataSourceProperties.getSecretKey());
            properties.setProperty(PropertyKeyConst.ENDPOINT, nacosDataSourceProperties.getEndpoint());
        }
        if (StringUtils.hasLength(nacosDataSourceProperties.getNamespace())) {
            properties.setProperty(PropertyKeyConst.NAMESPACE, nacosDataSourceProperties.getNamespace());
        }
        if (StringUtils.hasLength(nacosDataSourceProperties.getUsername())) {
            properties.setProperty(PropertyKeyConst.USERNAME, nacosDataSourceProperties.getUsername());
        }
        if (StringUtils.hasLength(nacosDataSourceProperties.getPassword())) {
            properties.setProperty(PropertyKeyConst.PASSWORD, nacosDataSourceProperties.getPassword());
        }
        return properties;
    }

    @Override
    public void write(T value) throws Exception {
        lock.lock();
        try {
            // 发布新配置
            configService.publishConfig(nacosDataSourceProperties.getDataId(), nacosDataSourceProperties.getGroupId(),
                this.configEncoder.convert(value), ConfigType.JSON.getType());
        } finally {
            lock.unlock();
        }
    }

    @Override
    public void close() throws Exception {

    }

}

3、新建SentinelNacosDataSourceHandler

public class SentinelNacosDataSourceHandler implements SmartInitializingSingleton {

    private final SentinelProperties sentinelProperties;

    public SentinelNacosDataSourceHandler(SentinelProperties sentinelProperties) {
        this.sentinelProperties = sentinelProperties;
    }

    // 实现SmartInitializingSingleton 的接口后，当所有非懒加载的单例Bean 都初始化完成以后，Spring 的IOC 容器会调用该接口的 afterSingletonsInstantiated() 方法
    @Override
    public void afterSingletonsInstantiated() {
        sentinelProperties.getDatasource().values().forEach(this::registryWriter);
    }

    private void registryWriter(DataSourcePropertiesConfiguration dataSourceProperties) {
        final NacosDataSourceProperties nacosDataSourceProperties = dataSourceProperties.getNacos();
        if (nacosDataSourceProperties == null) {
            return;
        }
        final RuleType ruleType = nacosDataSourceProperties.getRuleType();
        // 通过数据源配置的 ruleType 来注册数据源
        switch (ruleType) {
            case FLOW:
                WritableDataSource<List<FlowRule>> flowRuleWriter =
                    new NacosWritableDataSource<>(nacosDataSourceProperties, JSON::toJSONString);
                WritableDataSourceRegistry.registerFlowDataSource(flowRuleWriter);
                break;
            case DEGRADE:
                WritableDataSource<List<DegradeRule>> degradeRuleWriter =
                    new NacosWritableDataSource<>(nacosDataSourceProperties, JSON::toJSONString);
                WritableDataSourceRegistry.registerDegradeDataSource(degradeRuleWriter);
                break;
            case PARAM_FLOW:
                WritableDataSource<List<ParamFlowRule>> paramFlowRuleWriter =
                    new NacosWritableDataSource<>(nacosDataSourceProperties, JSON::toJSONString);
                ModifyParamFlowRulesCommandHandler.setWritableDataSource(paramFlowRuleWriter);
                break;
            case SYSTEM:
                WritableDataSource<List<SystemRule>> systemRuleWriter =
                    new NacosWritableDataSource<>(nacosDataSourceProperties, JSON::toJSONString);
                WritableDataSourceRegistry.registerSystemDataSource(systemRuleWriter);
                break;
            case AUTHORITY:
                WritableDataSource<List<AuthorityRule>> authRuleWriter =
                    new NacosWritableDataSource<>(nacosDataSourceProperties, JSON::toJSONString);
                WritableDataSourceRegistry.registerAuthorityDataSource(authRuleWriter);
                break;
            default:
                break;
        }
    }
}

4、添加SentinelNacosDataSourceHandler管理

@Configuration(proxyBeanMethods = false)
@AutoConfigureAfter(SentinelAutoConfiguration.class)
public class SentinelNacosDataSourceConfiguration {

    @Bean
    @ConditionalOnMissingBean
    public SentinelNacosDataSourceHandler sentinelNacosDataSourceHandler(SentinelProperties sentinelProperties) {
        return new SentinelNacosDataSourceHandler(sentinelProperties);
    }

}

5、添加yml配置

spring:
  cloud:
    nacos:
    sentinel:
      transport:
        dashboard: 192.168.252.212:11111
      eager: true
      web-context-unify: true #是否统一web上下文，默认true
      datasource:
        flow-manage: # 流控管理（这个名称可以自定义）
          nacos:
            namespace: sentinel
            group-id: SENTINEL_GROUP
            data-id: ${spring.application.name}-flow-rules
            server-addr: ${spring.cloud.nacos.server-addr}
            username: ${spring.cloud.nacos.username}
            password: ${spring.cloud.nacos.password}
            data-type: json
            rule-type: flow # 指定文件配置的是那种规则
        degrade-manage: # 熔断管理（这个名称可以自定义）
          nacos:
            namespace: sentinel
            group-id: SENTINEL_GROUP
            data-id: ${spring.application.name}-degrade-rules
            server-addr: ${spring.cloud.nacos.server-addr}
            username: ${spring.cloud.nacos.username}
            password: ${spring.cloud.nacos.password}
            data-type: json
            rule-type: degrade
        hot-param-manage: # 热点参数管理（这个名称可以自定义）
          nacos:
            namespace: sentinel
            group-id: SENTINEL_GROUP
            data-id: ${spring.application.name}-param-rules
            server-addr: ${spring.cloud.nacos.server-addr}
            username: ${spring.cloud.nacos.username}
            password: ${spring.cloud.nacos.password}
            data-type: json
            rule-type: param-flow

现在在Sentinel Dashboard 中新建规则即可自动同步到nacos中

二、sentinel-dashboard源码修改：

1、在pom.xml中把sentinel-datasource-nacos依赖的scope注释掉。

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

二、流控规则

1、在com.alibaba.csp.sentinel.dashboard.rule目录下创建一个nacos目录，并将test包下的 FlowRuleNacosProvider、FlowRuleNacosPublisher、NacosConfig 和 NacosConfigUtils都粘贴到nacos目录

2、新增NacosPropertiesConfiguration配置类

@Configuration
@ConfigurationProperties(prefix = "sentinel.nacos")
public class NacosPropertiesConfiguration {

    private String serverAddr;
    private String dataId;
    private String groupId;
    private String namespace;
    private String username;
    private String password;

    public String getServerAddr() {
        return serverAddr;
    }

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

    public String getDataId() {
        return dataId;
    }

    public void setDataId(String dataId) {
        this.dataId = dataId;
    }

    public String getGroupId() {
        return groupId;
    }

    public void setGroupId(String groupId) {
        this.groupId = groupId;
    }

    public String getNamespace() {
        return namespace;
    }

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

    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;
    }
}

3、application.properties添加naocs配置

sentinel.nacos.serverAddr=******
sentinel.nacos.username=******
sentinel.nacos.password=******
sentinel.nacos.namespace=sentinel

4、修改 NacosConfig 类以支持自定义配置

//    @Bean
//    public ConfigService nacosConfigService() throws Exception {
//        return ConfigFactory.createConfigService("localhost");
//    }

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

5、修改 FlowRuleNacosPublisher 确认配置文件格式为JSON

6、配置 V2 版本 Controller 调用 Nacos 提供的服务层

7、前端页面源码修改

文件路径: src/main/webapp/resources/app/scripts/controllers/identity.js
操作: 将 FlowServiceV1 改为 FlowServiceV2，将 /dashboard/flow/ 改为 /dashboard/v2/flow/。

文件路径: src/main/webapp/resources/app/scripts/directives/sidebar/sidebar.html

操作: 搜索 dashboard.flowV1 并定位到第 57 行，去掉 V1。

文件路径: src/main/webapp/resources/app/views/flow_v2.html

操作: 注释掉回到单机页面的按钮。

三、熔断规则

新增DegradeRuleNacosProvider：

@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.DEFRADE_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, 3000);
        if (StringUtil.isEmpty(rules)) {
            return new ArrayList<>();
        }
        return converter.convert(rules);
    }
}

新增DegradeRuleNacosPublisher：

@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.DEFRADE_DATA_ID_POSTFIX,
            NacosConfigUtil.GROUP_ID, converter.convert(rules), ConfigType.JSON.getType());
    }
}

NacosConfigUtil类新增：

public static final String DEFRADE_DATA_ID_POSTFIX = "-degrade-rules";

修改DegradeController：

@RestController
@RequestMapping("/degrade")
public class DegradeController {

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

    @Autowired
    private RuleRepository<DegradeRuleEntity, Long> repository;
    @Autowired
    private SentinelApiClient sentinelApiClient;
    @Autowired
    private AppManagement appManagement;

    @Autowired
    @Qualifier("degradeRuleNacosProvider")
    private DynamicRuleProvider<List<DegradeRuleEntity>> ruleProvider;

    @Autowired
    @Qualifier("degradeRuleNacosPublisher")
    private DynamicRulePublisher<List<DegradeRuleEntity>> rulePublisher;

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

    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;
    }
}

NacosConfig类新增：

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

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

四、热点参数

新增ParamRuleNacosProvider

@Component("paramRuleNacosProvider")
public class ParamRuleNacosProvider 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);
    }
}

新增ParamRuleNacosPublisher

@Component("paramRuleNacosPublisher")
public class ParamRuleNacosPublisher 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), ConfigType.JSON.getType());
    }
}

NacosConfigUtil类新增：

public static final String PARAM_FLOW_DATA_ID_POSTFIX = "-param-rules";

修改ParamFlowRuleController

@RestController
@RequestMapping(value = "/paramFlow")
public class ParamFlowRuleController {

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

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

    @Autowired
    @Qualifier("paramRuleNacosProvider")
    private DynamicRuleProvider<List<ParamFlowRuleEntity>> ruleProvider;

    @Autowired
    @Qualifier("paramRuleNacosPublisher")
    private DynamicRulePublisher<List<ParamFlowRuleEntity>> rulePublisher;

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

NacosConfig类新增：

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

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

五、客户端配置

pom添加依赖

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

yml文件添加配置

spring:
  cloud:
    sentinel:
      transport:
        dashboard: 127.0.0.1:8080
      eager: true
      web-context-unify: true #是否统一web上下文，默认true
      datasource:
        flow-manage: # 流控管理（这个名称可以自定义）
          nacos:
            namespace: sentinel
            group-id: SENTINEL_GROUP
            data-id: ${spring.application.name}-flow-rules
            server-addr: ${spring.cloud.nacos.server-addr}
            username: ${spring.cloud.nacos.username}
            password: ${spring.cloud.nacos.password}
            data-type: json
            rule-type: flow # 指定文件配置的是那种规则
        degrade-manage: # 熔断管理（这个名称可以自定义）
          nacos:
            namespace: sentinel
            group-id: SENTINEL_GROUP
            data-id: ${spring.application.name}-degrade-rules
            server-addr: ${spring.cloud.nacos.server-addr}
            username: ${spring.cloud.nacos.username}
            password: ${spring.cloud.nacos.password}
            data-type: json
            rule-type: degrade
        hot-param-manage: # 热点参数管理（这个名称可以自定义）
          nacos:
            namespace: sentinel
            group-id: SENTINEL_GROUP
            data-id: ${spring.application.name}-param-rules
            server-addr: ${spring.cloud.nacos.server-addr}
            username: ${spring.cloud.nacos.username}
            password: ${spring.cloud.nacos.password}
            data-type: json
            rule-type: param-flow