feat: add circuit breaker actuator

CHANGELOG.md

@@ -7,3 +7,4 @@
 - [Refactoring:remove invalid @AutoConfigureAfter and @AutoConfigureBefore from discovery client automatic configuration.](https://github.com/Tencent/spring-cloud-tencent/pull/1115)
 - [feat: support log path configuration parameters.](https://github.com/Tencent/spring-cloud-tencent/pull/1128)
 - [refactor:optimize the order and condition matching of service registration automatic configuration.](https://github.com/Tencent/spring-cloud-tencent/pull/1129)
+- [feat: add circuit breaker actuator.](https://github.com/Tencent/spring-cloud-tencent/pull/1136)

spring-cloud-starter-tencent-polaris-circuitbreaker/pom.xml

@@ -96,6 +96,18 @@
 		</dependency>
 		<!-- Polaris dependencies end -->
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-actuator</artifactId>
+			<optional>true</optional>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-actuator-autoconfigure</artifactId>
+			<optional>true</optional>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

spring-cloud-starter-tencent-polaris-circuitbreaker/src/main/java/com/tencent/cloud/polaris/circuitbreaker/endpoint/PolarisCircuitBreakerEndpoint.java

@@ -0,0 +1,86 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * 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.tencent.cloud.polaris.circuitbreaker.endpoint;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.google.protobuf.util.JsonFormat;
+import com.tencent.cloud.common.metadata.MetadataContext;
+import com.tencent.cloud.common.util.JacksonUtils;
+import com.tencent.cloud.polaris.context.ServiceRuleManager;
+import com.tencent.polaris.specification.api.v1.fault.tolerance.CircuitBreakerProto;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
+import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
+
+/**
+ * Endpoint of polaris circuit breaker, include circuit breaker rules.
+ *
+ * @author wenxuan70
+ */
+@Endpoint(id = "polaris-circuit-breaker")
+public class PolarisCircuitBreakerEndpoint {
+
+	private static final Logger LOG = LoggerFactory.getLogger(PolarisCircuitBreakerEndpoint.class);
+
+	private final ServiceRuleManager serviceRuleManager;
+
+	public PolarisCircuitBreakerEndpoint(ServiceRuleManager serviceRuleManager) {
+		this.serviceRuleManager = serviceRuleManager;
+	}
+
+	@ReadOperation
+	public Map<String, Object> circuitBreaker() {
+		CircuitBreakerProto.CircuitBreaker circuitBreaker = serviceRuleManager.getServiceCircuitBreakerRule(
+				MetadataContext.LOCAL_NAMESPACE,
+				MetadataContext.LOCAL_SERVICE
+		);
+
+		Map<String, Object> polarisCircuitBreakerInfo = new HashMap<>();
+
+		polarisCircuitBreakerInfo.put("namespace", MetadataContext.LOCAL_NAMESPACE);
+		polarisCircuitBreakerInfo.put("service", MetadataContext.LOCAL_SERVICE);
+		polarisCircuitBreakerInfo.put("circuitBreakerRules", parseCircuitBreakerRule(circuitBreaker));
+
+		return polarisCircuitBreakerInfo;
+	}
+
+	private List<Object> parseCircuitBreakerRule(CircuitBreakerProto.CircuitBreaker circuitBreaker) {
+		List<Object> circuitBreakerRuleList = new ArrayList<>();
+
+		for (CircuitBreakerProto.CircuitBreakerRule circuitBreakerRule : circuitBreaker.getRulesList()) {
+			String ruleJson;
+			try {
+				ruleJson = JsonFormat.printer().print(circuitBreakerRule);
+			}
+			catch (InvalidProtocolBufferException e) {
+				LOG.error("rule to Json failed. check rule {}.", circuitBreakerRule, e);
+				throw new RuntimeException("Json failed.", e);
+			}
+			circuitBreakerRuleList.add(JacksonUtils.deserialize2Map(ruleJson));
+		}
+
+		return circuitBreakerRuleList;
+	}
+}

spring-cloud-starter-tencent-polaris-circuitbreaker/src/main/java/com/tencent/cloud/polaris/circuitbreaker/endpoint/PolarisCircuitBreakerEndpointAutoConfiguration.java

@@ -0,0 +1,49 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * 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.tencent.cloud.polaris.circuitbreaker.endpoint;
+
+import com.tencent.cloud.polaris.circuitbreaker.config.ConditionalOnPolarisCircuitBreakerEnabled;
+import com.tencent.cloud.polaris.context.ServiceRuleManager;
+
+import org.springframework.boot.actuate.autoconfigure.endpoint.condition.ConditionalOnAvailableEndpoint;
+import org.springframework.boot.actuate.endpoint.annotation.Endpoint;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * The AutoConfiguration for Polaris CircuitBreaker's Endpoint.
+ *
+ * @author wenxuan70
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnClass(Endpoint.class)
+@ConditionalOnPolarisCircuitBreakerEnabled
+public class PolarisCircuitBreakerEndpointAutoConfiguration {
+
+	@Bean
+	@ConditionalOnBean(ServiceRuleManager.class)
+	@ConditionalOnMissingBean
+	@ConditionalOnAvailableEndpoint
+	public PolarisCircuitBreakerEndpoint polarisCircuitBreakerEndpoint(ServiceRuleManager serviceRuleManager) {
+		return new PolarisCircuitBreakerEndpoint(serviceRuleManager);
+	}
+
+}

spring-cloud-starter-tencent-polaris-circuitbreaker/src/main/resources/META-INF/spring.factories

@@ -2,6 +2,7 @@ org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
   com.tencent.cloud.polaris.circuitbreaker.config.PolarisCircuitBreakerAutoConfiguration,\
   com.tencent.cloud.polaris.circuitbreaker.config.ReactivePolarisCircuitBreakerAutoConfiguration,\
   com.tencent.cloud.polaris.circuitbreaker.config.PolarisCircuitBreakerFeignClientAutoConfiguration,\
-  com.tencent.cloud.polaris.circuitbreaker.config.GatewayPolarisCircuitBreakerAutoConfiguration
+  com.tencent.cloud.polaris.circuitbreaker.config.GatewayPolarisCircuitBreakerAutoConfiguration,\
+  com.tencent.cloud.polaris.circuitbreaker.endpoint.PolarisCircuitBreakerEndpointAutoConfiguration
 org.springframework.cloud.bootstrap.BootstrapConfiguration=\
   com.tencent.cloud.polaris.circuitbreaker.config.PolarisCircuitBreakerBootstrapConfiguration

spring-cloud-starter-tencent-polaris-circuitbreaker/src/test/java/com/tencent/cloud/polaris/circuitbreaker/endpoint/PolarisCircuitBreakerEndpointTest.java

@@ -0,0 +1,84 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * 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.tencent.cloud.polaris.circuitbreaker.endpoint;
+
+import java.util.Map;
+
+import com.google.protobuf.StringValue;
+import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
+import com.tencent.cloud.polaris.context.ServiceRuleManager;
+import com.tencent.polaris.specification.api.v1.fault.tolerance.CircuitBreakerProto;
+import com.tencent.polaris.specification.api.v1.model.ModelProto;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import org.springframework.boot.test.context.runner.ApplicationContextRunner;
+
+import static com.tencent.polaris.test.common.Consts.NAMESPACE_TEST;
+import static com.tencent.polaris.test.common.Consts.SERVICE_PROVIDER;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Test for {@link PolarisCircuitBreakerEndpoint}.
+ *
+ * @author wenxuan70
+ */
+@ExtendWith(MockitoExtension.class)
+public class PolarisCircuitBreakerEndpointTest {
+
+	private final ApplicationContextRunner contextRunner = new ApplicationContextRunner()
+			.withBean(ApplicationContextAwareUtils.class)
+			.withPropertyValues("spring.cloud.polaris.namespace=" + NAMESPACE_TEST)
+			.withPropertyValues("spring.cloud.polaris.service=" + SERVICE_PROVIDER);
+
+	private ServiceRuleManager serviceRuleManager;
+
+	@BeforeEach
+	void setUp() {
+		serviceRuleManager = mock(ServiceRuleManager.class);
+		when(serviceRuleManager.getServiceCircuitBreakerRule(anyString(), anyString())).thenAnswer(invocation -> {
+			CircuitBreakerProto.CircuitBreakerRule.Builder ruleBuilder = CircuitBreakerProto.CircuitBreakerRule.newBuilder();
+			ruleBuilder.setName("test_for_circuit_breaker");
+			ruleBuilder.setEnable(true);
+			ruleBuilder.setLevel(CircuitBreakerProto.Level.METHOD);
+			CircuitBreakerProto.RuleMatcher.Builder rmBuilder = CircuitBreakerProto.RuleMatcher.newBuilder();
+			rmBuilder.setDestination(CircuitBreakerProto.RuleMatcher.DestinationService.newBuilder().setNamespace("default").setService("svc2").setMethod(
+					ModelProto.MatchString.newBuilder().setValue(StringValue.newBuilder().setValue("*").build()).build()).build());
+			rmBuilder.setSource(CircuitBreakerProto.RuleMatcher.SourceService.newBuilder().setNamespace("*").setService("*").build());
+			ruleBuilder.setRuleMatcher(rmBuilder.build());
+			return CircuitBreakerProto.CircuitBreaker.newBuilder().addRules(ruleBuilder.build()).build();
+		});
+	}
+
+	@Test
+	public void testPolarisCircuitBreaker() {
+		contextRunner.run(context -> {
+			PolarisCircuitBreakerEndpoint endpoint = new PolarisCircuitBreakerEndpoint(serviceRuleManager);
+			Map<String, Object> circuitBreakerInfo = endpoint.circuitBreaker();
+			assertThat(circuitBreakerInfo).isNotNull();
+			assertThat(circuitBreakerInfo.get("namespace")).isNotNull();
+			assertThat(circuitBreakerInfo.get("service")).isNotNull();
+			assertThat(circuitBreakerInfo.get("circuitBreakerRules")).asList().isNotEmpty();
+		});
+	}
+}

spring-cloud-tencent-polaris-context/src/main/java/com/tencent/cloud/polaris/context/ServiceRuleManager.java

@@ -27,13 +27,14 @@
 import com.tencent.polaris.api.rpc.GetServiceRuleRequest;
 import com.tencent.polaris.api.rpc.ServiceRuleResponse;
 import com.tencent.polaris.client.api.SDKContext;
+import com.tencent.polaris.specification.api.v1.fault.tolerance.CircuitBreakerProto;
 import com.tencent.polaris.specification.api.v1.traffic.manage.RateLimitProto;
 import com.tencent.polaris.specification.api.v1.traffic.manage.RoutingProto;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * the manager of service governance rules. for example: rate limit rule, router rules.
+ * the manager of service governance rules. for example: rate limit rule, router rules, circuit breaker rules.
  *
  * @author lepdou 2022-05-13
  */
@@ -88,6 +89,20 @@ public List<RoutingProto.Route> getServiceRouterRule(String namespace, String so
 		return rules;
 	}
 
+	public CircuitBreakerProto.CircuitBreaker getServiceCircuitBreakerRule(String namespace, String service) {
+		LOG.debug("Get service circuit breaker rules with namespace:{} and service:{}.", namespace, service);
+
+		ServiceRule serviceRule = getServiceRule(namespace, service, ServiceEventKey.EventType.CIRCUIT_BREAKING);
+		if (serviceRule != null) {
+			Object rule = serviceRule.getRule();
+			if (rule instanceof CircuitBreakerProto.CircuitBreaker) {
+				return (CircuitBreakerProto.CircuitBreaker) rule;
+			}
+		}
+
+		return null;
+	}
+
 	private ServiceRule getServiceRule(String namespace, String service, ServiceEventKey.EventType eventType) {
 		GetServiceRuleRequest getServiceRuleRequest = new GetServiceRuleRequest();
 		getServiceRuleRequest.setRuleType(eventType);