| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.servicecomb.governance.handler; |
| |
| import java.time.Duration; |
| |
| import org.apache.servicecomb.governance.handler.ext.AbstractCircuitBreakerExtension; |
| import org.apache.servicecomb.governance.marker.GovernanceRequest; |
| import org.apache.servicecomb.governance.policy.CircuitBreakerPolicy; |
| import org.apache.servicecomb.governance.properties.CircuitBreakerProperties; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.beans.factory.ObjectProvider; |
| |
| import io.github.resilience4j.circuitbreaker.CircuitBreaker; |
| import io.github.resilience4j.circuitbreaker.CircuitBreakerConfig; |
| import io.github.resilience4j.circuitbreaker.CircuitBreakerRegistry; |
| import io.github.resilience4j.micrometer.tagged.TaggedCircuitBreakerMetrics; |
| import io.micrometer.core.instrument.MeterRegistry; |
| |
| public class CircuitBreakerHandler extends AbstractGovernanceHandler<CircuitBreaker, CircuitBreakerPolicy> { |
| private static final Logger LOGGER = LoggerFactory.getLogger(CircuitBreakerHandler.class); |
| |
| private final CircuitBreakerProperties circuitBreakerProperties; |
| |
| private final AbstractCircuitBreakerExtension circuitBreakerExtension; |
| |
| private final MeterRegistry meterRegistry; |
| |
| public CircuitBreakerHandler(CircuitBreakerProperties circuitBreakerProperties, |
| AbstractCircuitBreakerExtension circuitBreakerExtension, |
| ObjectProvider<MeterRegistry> meterRegistry) { |
| this.circuitBreakerProperties = circuitBreakerProperties; |
| this.circuitBreakerExtension = circuitBreakerExtension; |
| this.meterRegistry = meterRegistry.getIfAvailable(); |
| } |
| |
| @Override |
| protected String createKey(GovernanceRequest governanceRequest, CircuitBreakerPolicy policy) { |
| return CircuitBreakerProperties.MATCH_CIRCUITBREAKER_KEY + "." + policy.getName(); |
| } |
| |
| @Override |
| public CircuitBreakerPolicy matchPolicy(GovernanceRequest governanceRequest) { |
| return matchersManager.match(governanceRequest, circuitBreakerProperties.getParsedEntity()); |
| } |
| |
| @Override |
| public CircuitBreaker createProcessor(String key, GovernanceRequest governanceRequest, CircuitBreakerPolicy policy) { |
| return getCircuitBreaker(key, policy); |
| } |
| |
| private CircuitBreaker getCircuitBreaker(String key, CircuitBreakerPolicy policy) { |
| LOGGER.info("applying new policy {} for {}", key, policy); |
| |
| CircuitBreakerConfig circuitBreakerConfig = CircuitBreakerConfig.custom() |
| .failureRateThreshold(policy.getFailureRateThreshold()) |
| .slowCallRateThreshold(policy.getSlowCallRateThreshold()) |
| .waitDurationInOpenState(Duration.parse(policy.getWaitDurationInOpenState())) |
| .slowCallDurationThreshold(Duration.parse(policy.getSlowCallDurationThreshold())) |
| .permittedNumberOfCallsInHalfOpenState(policy.getPermittedNumberOfCallsInHalfOpenState()) |
| .minimumNumberOfCalls(policy.getMinimumNumberOfCalls()) |
| .slidingWindowType(policy.getSlidingWindowTypeEnum()) |
| .slidingWindowSize(Integer.parseInt(policy.getSlidingWindowSize())) |
| .recordException(circuitBreakerExtension::isFailedResult) |
| .recordResult(r -> circuitBreakerExtension.isFailedResult(policy.getRecordFailureStatus(), r)) |
| .build(); |
| CircuitBreakerRegistry circuitBreakerRegistry = CircuitBreakerRegistry.of(circuitBreakerConfig); |
| if (meterRegistry != null) { |
| TaggedCircuitBreakerMetrics |
| .ofCircuitBreakerRegistry(circuitBreakerRegistry) |
| .bindTo(meterRegistry); |
| } |
| return circuitBreakerRegistry.circuitBreaker(key, circuitBreakerConfig); |
| } |
| } |