feature: improve circuit breaker usage (#917)
Shanyou Yu (Sean Yu)
2 years ago
committed by
GitHub
parent
b88ff4d187
commit
776a646e81
@ -0,0 +1,97 @@
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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package com.tencent.cloud.polaris.circuitbreaker.feign;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import java.nio.charset.StandardCharsets;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.Map;
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import com.tencent.polaris.api.pojo.CircuitBreakerStatus;
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import com.tencent.polaris.circuitbreak.client.exception.CallAbortedException;
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import feign.Request;
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import feign.RequestTemplate;
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import feign.Response;
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import feign.codec.Decoder;
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import org.springframework.cloud.openfeign.FallbackFactory;
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/**
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* PolarisCircuitBreakerFallbackFactory.
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*
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* @author sean yu
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*/
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public class PolarisCircuitBreakerFallbackFactory implements FallbackFactory {
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private final Decoder decoder;
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public PolarisCircuitBreakerFallbackFactory(Decoder decoder) {
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this.decoder = decoder;
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}
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@Override
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public Object create(Throwable t) {
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return new DefaultFallback(t, decoder);
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}
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public class DefaultFallback {
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private final Throwable t;
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private final Decoder decoder;
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public DefaultFallback(Throwable t, Decoder decoder) {
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this.t = t;
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this.decoder = decoder;
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}
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public Object fallback(Method method) {
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if (t instanceof CallAbortedException) {
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CircuitBreakerStatus.FallbackInfo fallbackInfo = ((CallAbortedException) t).getFallbackInfo();
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if (fallbackInfo != null) {
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Response.Builder responseBuilder = Response.builder()
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.status(fallbackInfo.getCode());
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if (fallbackInfo.getHeaders() != null) {
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Map<String, Collection<String>> headers = new HashMap<>();
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fallbackInfo.getHeaders().forEach((k, v) -> headers.put(k, Collections.singleton(v)));
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responseBuilder.headers(headers);
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}
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if (fallbackInfo.getBody() != null) {
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responseBuilder.body(fallbackInfo.getBody(), StandardCharsets.UTF_8);
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}
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// Feign Response need a nonnull Request,
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// which is not important in fallback response (no real request),
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// so we create a fake one
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Request fakeRequest = Request.create(Request.HttpMethod.GET, "/", new HashMap<>(), Request.Body.empty(), new RequestTemplate());
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responseBuilder.request(fakeRequest);
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try (Response response = responseBuilder.build()) {
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return decoder.decode(response, method.getGenericReturnType());
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}
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catch (IOException e) {
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throw new IllegalStateException(e);
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}
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}
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}
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throw new IllegalStateException(t);
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}
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}
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}
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@ -0,0 +1,94 @@
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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package com.tencent.cloud.polaris.circuitbreaker.feign;
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import feign.Feign;
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import feign.Target;
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import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
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import org.springframework.cloud.openfeign.CircuitBreakerNameResolver;
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import org.springframework.cloud.openfeign.FallbackFactory;
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/**
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* PolarisFeignCircuitBreaker, mostly copy from {@link org.springframework.cloud.openfeign.FeignCircuitBreaker}, but giving Polaris modification.
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*
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* @author sean yu
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*/
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public final class PolarisFeignCircuitBreaker {
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private PolarisFeignCircuitBreaker() {
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throw new IllegalStateException("Don't instantiate a utility class");
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}
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/**
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* @return builder for Feign CircuitBreaker integration
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*/
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public static PolarisFeignCircuitBreaker.Builder builder() {
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return new PolarisFeignCircuitBreaker.Builder();
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}
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/**
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* Builder for Feign CircuitBreaker integration.
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*/
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public static final class Builder extends Feign.Builder {
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public Builder() {
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}
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private CircuitBreakerFactory circuitBreakerFactory;
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private String feignClientName;
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private CircuitBreakerNameResolver circuitBreakerNameResolver;
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public PolarisFeignCircuitBreaker.Builder circuitBreakerFactory(CircuitBreakerFactory circuitBreakerFactory) {
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this.circuitBreakerFactory = circuitBreakerFactory;
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return this;
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}
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public PolarisFeignCircuitBreaker.Builder feignClientName(String feignClientName) {
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this.feignClientName = feignClientName;
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return this;
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}
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public PolarisFeignCircuitBreaker.Builder circuitBreakerNameResolver(CircuitBreakerNameResolver circuitBreakerNameResolver) {
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this.circuitBreakerNameResolver = circuitBreakerNameResolver;
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return this;
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}
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public <T> T target(Target<T> target, T fallback) {
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return build(fallback != null ? new FallbackFactory.Default<T>(fallback) : null).newInstance(target);
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}
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public <T> T target(Target<T> target, FallbackFactory<? extends T> fallbackFactory) {
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return build(fallbackFactory).newInstance(target);
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}
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@Override
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public <T> T target(Target<T> target) {
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return build(null).newInstance(target);
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}
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public Feign build(final FallbackFactory<?> nullableFallbackFactory) {
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this.invocationHandlerFactory((target, dispatch) -> new PolarisFeignCircuitBreakerInvocationHandler(
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circuitBreakerFactory, feignClientName, target, dispatch, nullableFallbackFactory, circuitBreakerNameResolver, this.decoder));
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return this.build();
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}
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}
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}
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@ -0,0 +1,200 @@
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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package com.tencent.cloud.polaris.circuitbreaker.feign;
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import java.lang.reflect.InvocationHandler;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.lang.reflect.Proxy;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.function.Function;
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import java.util.function.Supplier;
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import feign.InvocationHandlerFactory;
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import feign.Target;
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import feign.codec.Decoder;
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import org.springframework.cloud.client.circuitbreaker.CircuitBreaker;
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import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
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import org.springframework.cloud.client.circuitbreaker.NoFallbackAvailableException;
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import org.springframework.cloud.openfeign.CircuitBreakerNameResolver;
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import org.springframework.cloud.openfeign.FallbackFactory;
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import org.springframework.web.context.request.RequestAttributes;
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import org.springframework.web.context.request.RequestContextHolder;
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import static feign.Util.checkNotNull;
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/**
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* PolarisFeignCircuitBreakerInvocationHandler, mostly copy from {@link org.springframework.cloud.openfeign.FeignCircuitBreakerInvocationHandler}, but giving Polaris modification.
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*
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* @author sean yu
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*/
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public class PolarisFeignCircuitBreakerInvocationHandler implements InvocationHandler {
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private final CircuitBreakerFactory factory;
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private final String feignClientName;
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private final Target<?> target;
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private final Map<Method, InvocationHandlerFactory.MethodHandler> dispatch;
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private final FallbackFactory<?> nullableFallbackFactory;
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private final Map<Method, Method> fallbackMethodMap;
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private final CircuitBreakerNameResolver circuitBreakerNameResolver;
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private final Decoder decoder;
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public PolarisFeignCircuitBreakerInvocationHandler(CircuitBreakerFactory factory, String feignClientName, Target<?> target,
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Map<Method, InvocationHandlerFactory.MethodHandler> dispatch, FallbackFactory<?> nullableFallbackFactory,
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CircuitBreakerNameResolver circuitBreakerNameResolver, Decoder decoder) {
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this.factory = factory;
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this.feignClientName = feignClientName;
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this.target = checkNotNull(target, "target");
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this.dispatch = checkNotNull(dispatch, "dispatch");
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this.fallbackMethodMap = toFallbackMethod(dispatch);
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this.nullableFallbackFactory = nullableFallbackFactory;
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this.circuitBreakerNameResolver = circuitBreakerNameResolver;
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this.decoder = decoder;
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}
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@Override
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public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
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// early exit if the invoked method is from java.lang.Object
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// code is the same as ReflectiveFeign.FeignInvocationHandler
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if ("equals".equals(method.getName())) {
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try {
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Object otherHandler = args.length > 0 && args[0] != null ? Proxy.getInvocationHandler(args[0]) : null;
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return equals(otherHandler);
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}
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catch (IllegalArgumentException e) {
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return false;
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}
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}
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else if ("hashCode".equals(method.getName())) {
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return hashCode();
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}
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else if ("toString".equals(method.getName())) {
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return toString();
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}
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String circuitName = circuitBreakerNameResolver.resolveCircuitBreakerName(feignClientName, target, method);
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CircuitBreaker circuitBreaker = factory.create(circuitName);
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Supplier<Object> supplier = asSupplier(method, args);
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Function<Throwable, Object> fallbackFunction;
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if (this.nullableFallbackFactory != null) {
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fallbackFunction = throwable -> {
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Object fallback = this.nullableFallbackFactory.create(throwable);
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try {
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return this.fallbackMethodMap.get(method).invoke(fallback, args);
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}
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catch (Exception exception) {
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unwrapAndRethrow(exception);
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}
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return null;
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};
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}
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else {
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fallbackFunction = throwable -> {
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PolarisCircuitBreakerFallbackFactory.DefaultFallback fallback =
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(PolarisCircuitBreakerFallbackFactory.DefaultFallback) new PolarisCircuitBreakerFallbackFactory(this.decoder).create(throwable);
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return fallback.fallback(method);
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};
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}
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return circuitBreaker.run(supplier, fallbackFunction);
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}
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private void unwrapAndRethrow(Exception exception) {
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if (exception instanceof InvocationTargetException || exception instanceof NoFallbackAvailableException) {
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Throwable underlyingException = exception.getCause();
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if (underlyingException instanceof RuntimeException) {
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throw (RuntimeException) underlyingException;
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}
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if (underlyingException != null) {
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throw new IllegalStateException(underlyingException);
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}
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throw new IllegalStateException(exception);
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}
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}
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private Supplier<Object> asSupplier(final Method method, final Object[] args) {
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final RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
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final Thread caller = Thread.currentThread();
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return () -> {
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boolean isAsync = caller != Thread.currentThread();
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try {
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if (isAsync) {
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RequestContextHolder.setRequestAttributes(requestAttributes);
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}
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return dispatch.get(method).invoke(args);
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}
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catch (RuntimeException throwable) {
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throw throwable;
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}
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catch (Throwable throwable) {
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throw new RuntimeException(throwable);
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}
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finally {
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if (isAsync) {
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RequestContextHolder.resetRequestAttributes();
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}
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}
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};
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}
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/**
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* If the method param of {@link InvocationHandler#invoke(Object, Method, Object[])}
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* is not accessible, i.e in a package-private interface, the fallback call will cause
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* of access restrictions. But methods in dispatch are copied methods. So setting
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* access to dispatch method doesn't take effect to the method in
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* InvocationHandler.invoke. Use map to store a copy of method to invoke the fallback
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* to bypass this and reducing the count of reflection calls.
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* @return cached methods map for fallback invoking
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*/
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static Map<Method, Method> toFallbackMethod(Map<Method, InvocationHandlerFactory.MethodHandler> dispatch) {
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Map<Method, Method> result = new LinkedHashMap<>();
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for (Method method : dispatch.keySet()) {
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method.setAccessible(true);
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result.put(method, method);
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}
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return result;
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}
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@Override
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public boolean equals(Object obj) {
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if (obj instanceof PolarisFeignCircuitBreakerInvocationHandler) {
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PolarisFeignCircuitBreakerInvocationHandler other = (PolarisFeignCircuitBreakerInvocationHandler) obj;
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return this.target.equals(other.target);
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}
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return false;
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}
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@Override
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public int hashCode() {
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return this.target.hashCode();
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}
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@Override
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public String toString() {
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return this.target.toString();
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}
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}
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@ -0,0 +1,103 @@
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
|
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
|
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*
|
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* Licensed under the BSD 3-Clause License (the "License");
|
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* you may not use this file except in compliance with the License.
|
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* You may obtain a copy of the License at
|
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
|
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
|
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
|
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* specific language governing permissions and limitations under the License.
|
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*/
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package com.tencent.cloud.polaris.circuitbreaker.feign;
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import feign.Feign;
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import feign.Target;
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import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
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import org.springframework.cloud.openfeign.CircuitBreakerNameResolver;
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import org.springframework.cloud.openfeign.FallbackFactory;
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import org.springframework.cloud.openfeign.FeignClientFactory;
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import org.springframework.cloud.openfeign.FeignClientFactoryBean;
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import org.springframework.cloud.openfeign.Targeter;
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import org.springframework.util.StringUtils;
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/**
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* PolarisFeignCircuitBreakerTargeter, mostly copy from {@link org.springframework.cloud.openfeign.FeignCircuitBreakerTargeter}, but giving Polaris modification.
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*
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* @author sean yu
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*/
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public class PolarisFeignCircuitBreakerTargeter implements Targeter {
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private final CircuitBreakerFactory circuitBreakerFactory;
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private final CircuitBreakerNameResolver circuitBreakerNameResolver;
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public PolarisFeignCircuitBreakerTargeter(CircuitBreakerFactory circuitBreakerFactory, CircuitBreakerNameResolver circuitBreakerNameResolver) {
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this.circuitBreakerFactory = circuitBreakerFactory;
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this.circuitBreakerNameResolver = circuitBreakerNameResolver;
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}
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@Override
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public <T> T target(FeignClientFactoryBean factory, Feign.Builder feign, FeignClientFactory context,
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Target.HardCodedTarget<T> target) {
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if (!(feign instanceof PolarisFeignCircuitBreaker.Builder)) {
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return feign.target(target);
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}
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PolarisFeignCircuitBreaker.Builder builder = (PolarisFeignCircuitBreaker.Builder) feign;
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String name = !StringUtils.hasText(factory.getContextId()) ? factory.getName() : factory.getContextId();
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Class<?> fallback = factory.getFallback();
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if (fallback != void.class) {
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return targetWithFallback(name, context, target, builder, fallback);
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}
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Class<?> fallbackFactory = factory.getFallbackFactory();
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if (fallbackFactory != void.class) {
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return targetWithFallbackFactory(name, context, target, builder, fallbackFactory);
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}
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return builder(name, builder).target(target);
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}
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private <T> T targetWithFallbackFactory(String feignClientName, FeignClientFactory context,
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Target.HardCodedTarget<T> target, PolarisFeignCircuitBreaker.Builder builder, Class<?> fallbackFactoryClass) {
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FallbackFactory<? extends T> fallbackFactory = (FallbackFactory<? extends T>) getFromContext("fallbackFactory",
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feignClientName, context, fallbackFactoryClass, FallbackFactory.class);
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return builder(feignClientName, builder).target(target, fallbackFactory);
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}
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private <T> T targetWithFallback(String feignClientName, FeignClientFactory context, Target.HardCodedTarget<T> target,
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PolarisFeignCircuitBreaker.Builder builder, Class<?> fallback) {
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T fallbackInstance = getFromContext("fallback", feignClientName, context, fallback, target.type());
|
||||
return builder(feignClientName, builder).target(target, fallbackInstance);
|
||||
}
|
||||
|
||||
private <T> T getFromContext(String fallbackMechanism, String feignClientName, FeignClientFactory context,
|
||||
Class<?> beanType, Class<T> targetType) {
|
||||
Object fallbackInstance = context.getInstance(feignClientName, beanType);
|
||||
if (fallbackInstance == null) {
|
||||
throw new IllegalStateException(
|
||||
String.format("No " + fallbackMechanism + " instance of type %s found for feign client %s",
|
||||
beanType, feignClientName));
|
||||
}
|
||||
|
||||
if (!targetType.isAssignableFrom(beanType)) {
|
||||
throw new IllegalStateException(String.format("Incompatible " + fallbackMechanism
|
||||
+ " instance. Fallback/fallbackFactory of type %s is not assignable to %s for feign client %s",
|
||||
beanType, targetType, feignClientName));
|
||||
}
|
||||
return (T) fallbackInstance;
|
||||
}
|
||||
|
||||
private PolarisFeignCircuitBreaker.Builder builder(String feignClientName, PolarisFeignCircuitBreaker.Builder builder) {
|
||||
return builder
|
||||
.circuitBreakerFactory(circuitBreakerFactory)
|
||||
.feignClientName(feignClientName)
|
||||
.circuitBreakerNameResolver(circuitBreakerNameResolver);
|
||||
}
|
||||
|
||||
}
|
||||
@ -0,0 +1,54 @@
|
||||
/*
|
||||
* 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.resttemplate;
|
||||
|
||||
import java.lang.annotation.Documented;
|
||||
import java.lang.annotation.ElementType;
|
||||
import java.lang.annotation.Retention;
|
||||
import java.lang.annotation.RetentionPolicy;
|
||||
import java.lang.annotation.Target;
|
||||
|
||||
/**
|
||||
* PolarisCircuitBreaker annotation.
|
||||
* if coded fallback or fallbackClass provided, RestTemplate will always return fallback when any exception occurs,
|
||||
* if none coded fallback or fallbackClass provided, RestTemplate will return fallback response from Polaris server when fallback occurs.
|
||||
* fallback and fallbackClass cannot provide at same time.
|
||||
*
|
||||
* @author sean yu
|
||||
*/
|
||||
@Target({ ElementType.METHOD })
|
||||
@Retention(RetentionPolicy.RUNTIME)
|
||||
@Documented
|
||||
public @interface PolarisCircuitBreaker {
|
||||
|
||||
/**
|
||||
* a fallback string, will return a response { status: 200, body: fallback string} when any exception occurs.
|
||||
*
|
||||
* @return fallback string
|
||||
*/
|
||||
String fallback() default "";
|
||||
|
||||
/**
|
||||
* a fallback Class, will return a PolarisCircuitBreakerHttpResponse when any exception occurs.
|
||||
* fallback Class must be a spring bean.
|
||||
*
|
||||
* @return PolarisCircuitBreakerFallback
|
||||
*/
|
||||
Class<? extends PolarisCircuitBreakerFallback> fallbackClass() default PolarisCircuitBreakerFallback.class;
|
||||
|
||||
}
|
||||
@ -0,0 +1,29 @@
|
||||
/*
|
||||
* 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.resttemplate;
|
||||
|
||||
/**
|
||||
* PolarisCircuitBreakerFallback.
|
||||
*
|
||||
* @author sean yu
|
||||
*/
|
||||
public interface PolarisCircuitBreakerFallback {
|
||||
|
||||
PolarisCircuitBreakerHttpResponse fallback();
|
||||
|
||||
}
|
||||
@ -0,0 +1,105 @@
|
||||
/*
|
||||
* 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.resttemplate;
|
||||
|
||||
import java.io.ByteArrayInputStream;
|
||||
import java.io.IOException;
|
||||
import java.io.InputStream;
|
||||
import java.util.Map;
|
||||
|
||||
import com.tencent.polaris.api.pojo.CircuitBreakerStatus;
|
||||
|
||||
import org.springframework.http.HttpHeaders;
|
||||
import org.springframework.http.HttpStatus;
|
||||
import org.springframework.http.client.AbstractClientHttpResponse;
|
||||
|
||||
import static com.tencent.cloud.rpc.enhancement.resttemplate.EnhancedRestTemplateReporter.POLARIS_CIRCUIT_BREAKER_FALLBACK_HEADER;
|
||||
|
||||
/**
|
||||
* PolarisCircuitBreakerHttpResponse.
|
||||
*
|
||||
* @author sean yu
|
||||
*/
|
||||
public class PolarisCircuitBreakerHttpResponse extends AbstractClientHttpResponse {
|
||||
|
||||
private final CircuitBreakerStatus.FallbackInfo fallbackInfo;
|
||||
|
||||
private HttpHeaders headers = new HttpHeaders();
|
||||
|
||||
private InputStream body;
|
||||
|
||||
public PolarisCircuitBreakerHttpResponse(int code) {
|
||||
this(new CircuitBreakerStatus.FallbackInfo(code, null, null));
|
||||
}
|
||||
|
||||
public PolarisCircuitBreakerHttpResponse(int code, String body) {
|
||||
this(new CircuitBreakerStatus.FallbackInfo(code, null, body));
|
||||
}
|
||||
|
||||
public PolarisCircuitBreakerHttpResponse(int code, Map<String, String> headers, String body) {
|
||||
this(new CircuitBreakerStatus.FallbackInfo(code, headers, body));
|
||||
}
|
||||
|
||||
PolarisCircuitBreakerHttpResponse(CircuitBreakerStatus.FallbackInfo fallbackInfo) {
|
||||
this.fallbackInfo = fallbackInfo;
|
||||
headers.add(POLARIS_CIRCUIT_BREAKER_FALLBACK_HEADER, "true");
|
||||
if (fallbackInfo.getHeaders() != null) {
|
||||
fallbackInfo.getHeaders().forEach(headers::add);
|
||||
}
|
||||
if (fallbackInfo.getBody() != null) {
|
||||
body = new ByteArrayInputStream(fallbackInfo.getBody().getBytes());
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public final int getRawStatusCode() {
|
||||
return fallbackInfo.getCode();
|
||||
}
|
||||
|
||||
@Override
|
||||
public final String getStatusText() {
|
||||
HttpStatus status = HttpStatus.resolve(getRawStatusCode());
|
||||
return (status != null ? status.getReasonPhrase() : "");
|
||||
}
|
||||
|
||||
@Override
|
||||
public final void close() {
|
||||
if (this.body != null) {
|
||||
try {
|
||||
this.body.close();
|
||||
}
|
||||
catch (IOException e) {
|
||||
// Ignore exception on close...
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public final InputStream getBody() {
|
||||
return this.body;
|
||||
}
|
||||
|
||||
@Override
|
||||
public final HttpHeaders getHeaders() {
|
||||
return this.headers;
|
||||
}
|
||||
|
||||
public CircuitBreakerStatus.FallbackInfo getFallbackInfo() {
|
||||
return this.fallbackInfo;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,125 @@
|
||||
/*
|
||||
* 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.resttemplate;
|
||||
|
||||
import java.util.concurrent.ConcurrentHashMap;
|
||||
|
||||
import org.springframework.beans.BeansException;
|
||||
import org.springframework.beans.factory.config.BeanDefinition;
|
||||
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
|
||||
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
|
||||
import org.springframework.beans.factory.support.MergedBeanDefinitionPostProcessor;
|
||||
import org.springframework.beans.factory.support.RootBeanDefinition;
|
||||
import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
|
||||
import org.springframework.context.ApplicationContext;
|
||||
import org.springframework.core.type.MethodMetadata;
|
||||
import org.springframework.core.type.StandardMethodMetadata;
|
||||
import org.springframework.util.StringUtils;
|
||||
import org.springframework.web.client.RestTemplate;
|
||||
|
||||
/**
|
||||
* PolarisCircuitBreakerRestTemplateBeanPostProcessor.
|
||||
*
|
||||
* @author sean yu
|
||||
*/
|
||||
public class PolarisCircuitBreakerRestTemplateBeanPostProcessor implements MergedBeanDefinitionPostProcessor {
|
||||
|
||||
private final ApplicationContext applicationContext;
|
||||
|
||||
public PolarisCircuitBreakerRestTemplateBeanPostProcessor(ApplicationContext applicationContext) {
|
||||
this.applicationContext = applicationContext;
|
||||
}
|
||||
|
||||
private final ConcurrentHashMap<String, PolarisCircuitBreaker> cache = new ConcurrentHashMap<>();
|
||||
|
||||
private void checkPolarisCircuitBreakerRestTemplate(PolarisCircuitBreaker polarisCircuitBreaker) {
|
||||
if (
|
||||
StringUtils.hasText(polarisCircuitBreaker.fallback()) &&
|
||||
!PolarisCircuitBreakerFallback.class.toGenericString().equals(polarisCircuitBreaker.fallbackClass().toGenericString())
|
||||
) {
|
||||
throw new IllegalArgumentException("PolarisCircuitBreaker's fallback and fallbackClass could not set at sametime !");
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void postProcessMergedBeanDefinition(RootBeanDefinition beanDefinition, Class<?> beanType, String beanName) {
|
||||
if (checkAnnotated(beanDefinition, beanType, beanName)) {
|
||||
PolarisCircuitBreaker polarisCircuitBreaker;
|
||||
if (beanDefinition.getSource() instanceof StandardMethodMetadata) {
|
||||
polarisCircuitBreaker = ((StandardMethodMetadata) beanDefinition.getSource()).getIntrospectedMethod()
|
||||
.getAnnotation(PolarisCircuitBreaker.class);
|
||||
}
|
||||
else {
|
||||
polarisCircuitBreaker = beanDefinition.getResolvedFactoryMethod()
|
||||
.getAnnotation(PolarisCircuitBreaker.class);
|
||||
}
|
||||
checkPolarisCircuitBreakerRestTemplate(polarisCircuitBreaker);
|
||||
cache.put(beanName, polarisCircuitBreaker);
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
|
||||
if (cache.containsKey(beanName)) {
|
||||
// add interceptor for each RestTemplate with @PolarisCircuitBreaker annotation
|
||||
StringBuilder interceptorBeanNamePrefix = new StringBuilder();
|
||||
PolarisCircuitBreaker polarisCircuitBreaker = cache.get(beanName);
|
||||
interceptorBeanNamePrefix
|
||||
.append(StringUtils.uncapitalize(
|
||||
PolarisCircuitBreaker.class.getSimpleName()))
|
||||
.append("_")
|
||||
.append(polarisCircuitBreaker.fallback())
|
||||
.append("_")
|
||||
.append(polarisCircuitBreaker.fallbackClass().getSimpleName());
|
||||
RestTemplate restTemplate = (RestTemplate) bean;
|
||||
String interceptorBeanName = interceptorBeanNamePrefix + "@" + bean;
|
||||
CircuitBreakerFactory circuitBreakerFactory = this.applicationContext.getBean(CircuitBreakerFactory.class);
|
||||
registerBean(interceptorBeanName, polarisCircuitBreaker, applicationContext, circuitBreakerFactory, restTemplate);
|
||||
PolarisCircuitBreakerRestTemplateInterceptor polarisCircuitBreakerRestTemplateInterceptor = applicationContext
|
||||
.getBean(interceptorBeanName, PolarisCircuitBreakerRestTemplateInterceptor.class);
|
||||
restTemplate.getInterceptors().add(0, polarisCircuitBreakerRestTemplateInterceptor);
|
||||
}
|
||||
return bean;
|
||||
}
|
||||
|
||||
private boolean checkAnnotated(RootBeanDefinition beanDefinition,
|
||||
Class<?> beanType, String beanName) {
|
||||
return beanName != null && beanType == RestTemplate.class
|
||||
&& beanDefinition.getSource() instanceof MethodMetadata
|
||||
&& ((MethodMetadata) beanDefinition.getSource())
|
||||
.isAnnotated(PolarisCircuitBreaker.class.getName());
|
||||
}
|
||||
|
||||
private void registerBean(String interceptorBeanName, PolarisCircuitBreaker polarisCircuitBreaker,
|
||||
ApplicationContext applicationContext, CircuitBreakerFactory circuitBreakerFactory, RestTemplate restTemplate) {
|
||||
// register PolarisCircuitBreakerRestTemplateInterceptor bean
|
||||
DefaultListableBeanFactory beanFactory = (DefaultListableBeanFactory) applicationContext
|
||||
.getAutowireCapableBeanFactory();
|
||||
BeanDefinitionBuilder beanDefinitionBuilder = BeanDefinitionBuilder
|
||||
.genericBeanDefinition(PolarisCircuitBreakerRestTemplateInterceptor.class);
|
||||
beanDefinitionBuilder.addConstructorArgValue(polarisCircuitBreaker);
|
||||
beanDefinitionBuilder.addConstructorArgValue(applicationContext);
|
||||
beanDefinitionBuilder.addConstructorArgValue(circuitBreakerFactory);
|
||||
beanDefinitionBuilder.addConstructorArgValue(restTemplate);
|
||||
BeanDefinition interceptorBeanDefinition = beanDefinitionBuilder
|
||||
.getRawBeanDefinition();
|
||||
beanFactory.registerBeanDefinition(interceptorBeanName,
|
||||
interceptorBeanDefinition);
|
||||
}
|
||||
|
||||
}
|
||||
@ -0,0 +1,111 @@
|
||||
/*
|
||||
* 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.resttemplate;
|
||||
|
||||
import java.io.IOException;
|
||||
import java.lang.reflect.Method;
|
||||
|
||||
import com.tencent.cloud.rpc.enhancement.resttemplate.EnhancedRestTemplateReporter;
|
||||
import com.tencent.polaris.api.pojo.CircuitBreakerStatus;
|
||||
import com.tencent.polaris.circuitbreak.client.exception.CallAbortedException;
|
||||
|
||||
import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
|
||||
import org.springframework.context.ApplicationContext;
|
||||
import org.springframework.http.HttpRequest;
|
||||
import org.springframework.http.client.ClientHttpRequestExecution;
|
||||
import org.springframework.http.client.ClientHttpRequestInterceptor;
|
||||
import org.springframework.http.client.ClientHttpResponse;
|
||||
import org.springframework.util.ReflectionUtils;
|
||||
import org.springframework.util.StringUtils;
|
||||
import org.springframework.web.client.ResponseErrorHandler;
|
||||
import org.springframework.web.client.RestTemplate;
|
||||
|
||||
import static com.tencent.cloud.rpc.enhancement.resttemplate.EnhancedRestTemplateReporter.HEADER_HAS_ERROR;
|
||||
|
||||
/**
|
||||
* PolarisCircuitBreakerRestTemplateInterceptor.
|
||||
*
|
||||
* @author sean yu
|
||||
*/
|
||||
public class PolarisCircuitBreakerRestTemplateInterceptor implements ClientHttpRequestInterceptor {
|
||||
|
||||
private final PolarisCircuitBreaker polarisCircuitBreaker;
|
||||
|
||||
private final ApplicationContext applicationContext;
|
||||
|
||||
private final CircuitBreakerFactory circuitBreakerFactory;
|
||||
|
||||
private final RestTemplate restTemplate;
|
||||
|
||||
public PolarisCircuitBreakerRestTemplateInterceptor(
|
||||
PolarisCircuitBreaker polarisCircuitBreaker,
|
||||
ApplicationContext applicationContext,
|
||||
CircuitBreakerFactory circuitBreakerFactory,
|
||||
RestTemplate restTemplate
|
||||
) {
|
||||
this.polarisCircuitBreaker = polarisCircuitBreaker;
|
||||
this.applicationContext = applicationContext;
|
||||
this.circuitBreakerFactory = circuitBreakerFactory;
|
||||
this.restTemplate = restTemplate;
|
||||
}
|
||||
|
||||
@Override
|
||||
public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
|
||||
return circuitBreakerFactory.create(request.getURI().getHost() + "#" + request.getURI().getPath()).run(
|
||||
() -> {
|
||||
try {
|
||||
ClientHttpResponse response = execution.execute(request, body);
|
||||
// pre handle response error
|
||||
// EnhancedRestTemplateReporter always return true,
|
||||
// so we need to check header set by EnhancedRestTemplateReporter
|
||||
ResponseErrorHandler errorHandler = restTemplate.getErrorHandler();
|
||||
boolean hasError = errorHandler.hasError(response);
|
||||
if (errorHandler instanceof EnhancedRestTemplateReporter) {
|
||||
hasError = Boolean.parseBoolean(response.getHeaders().getFirst(HEADER_HAS_ERROR));
|
||||
}
|
||||
if (hasError) {
|
||||
errorHandler.handleError(request.getURI(), request.getMethod(), response);
|
||||
}
|
||||
return response;
|
||||
}
|
||||
catch (IOException e) {
|
||||
throw new IllegalStateException(e);
|
||||
}
|
||||
},
|
||||
t -> {
|
||||
if (StringUtils.hasText(polarisCircuitBreaker.fallback())) {
|
||||
CircuitBreakerStatus.FallbackInfo fallbackInfo = new CircuitBreakerStatus.FallbackInfo(200, null, polarisCircuitBreaker.fallback());
|
||||
return new PolarisCircuitBreakerHttpResponse(fallbackInfo);
|
||||
}
|
||||
if (!PolarisCircuitBreakerFallback.class.toGenericString().equals(polarisCircuitBreaker.fallbackClass().toGenericString())) {
|
||||
Method method = ReflectionUtils.findMethod(PolarisCircuitBreakerFallback.class, "fallback");
|
||||
PolarisCircuitBreakerFallback polarisCircuitBreakerFallback = applicationContext.getBean(polarisCircuitBreaker.fallbackClass());
|
||||
return (PolarisCircuitBreakerHttpResponse) ReflectionUtils.invokeMethod(method, polarisCircuitBreakerFallback);
|
||||
}
|
||||
if (t instanceof CallAbortedException) {
|
||||
CircuitBreakerStatus.FallbackInfo fallbackInfo = ((CallAbortedException) t).getFallbackInfo();
|
||||
if (fallbackInfo != null) {
|
||||
return new PolarisCircuitBreakerHttpResponse(fallbackInfo);
|
||||
}
|
||||
}
|
||||
throw new IllegalStateException(t);
|
||||
}
|
||||
);
|
||||
}
|
||||
|
||||
}
|
||||
@ -0,0 +1,322 @@
|
||||
/*
|
||||
* 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;
|
||||
|
||||
import java.io.BufferedReader;
|
||||
import java.io.IOException;
|
||||
import java.io.InputStream;
|
||||
import java.io.InputStreamReader;
|
||||
import java.net.URI;
|
||||
import java.net.URISyntaxException;
|
||||
import java.nio.charset.StandardCharsets;
|
||||
import java.util.HashMap;
|
||||
import java.util.stream.Collectors;
|
||||
|
||||
import com.google.protobuf.InvalidProtocolBufferException;
|
||||
import com.google.protobuf.util.JsonFormat;
|
||||
import com.tencent.cloud.polaris.circuitbreaker.config.PolarisCircuitBreakerFeignClientAutoConfiguration;
|
||||
import com.tencent.cloud.polaris.circuitbreaker.resttemplate.PolarisCircuitBreaker;
|
||||
import com.tencent.cloud.polaris.circuitbreaker.resttemplate.PolarisCircuitBreakerFallback;
|
||||
import com.tencent.cloud.polaris.circuitbreaker.resttemplate.PolarisCircuitBreakerHttpResponse;
|
||||
import com.tencent.cloud.rpc.enhancement.config.RpcEnhancementReporterProperties;
|
||||
import com.tencent.cloud.rpc.enhancement.resttemplate.EnhancedRestTemplateReporter;
|
||||
import com.tencent.polaris.api.core.ConsumerAPI;
|
||||
import com.tencent.polaris.api.pojo.ServiceKey;
|
||||
import com.tencent.polaris.circuitbreak.api.CircuitBreakAPI;
|
||||
import com.tencent.polaris.circuitbreak.factory.CircuitBreakAPIFactory;
|
||||
import com.tencent.polaris.client.util.Utils;
|
||||
import com.tencent.polaris.specification.api.v1.fault.tolerance.CircuitBreakerProto;
|
||||
import com.tencent.polaris.test.common.TestUtils;
|
||||
import com.tencent.polaris.test.mock.discovery.NamingServer;
|
||||
import org.junit.jupiter.api.AfterAll;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import org.junit.jupiter.api.extension.ExtendWith;
|
||||
|
||||
import org.springframework.beans.factory.annotation.Autowired;
|
||||
import org.springframework.beans.factory.annotation.Qualifier;
|
||||
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
|
||||
import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
|
||||
import org.springframework.boot.test.context.SpringBootTest;
|
||||
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
|
||||
import org.springframework.cloud.openfeign.EnableFeignClients;
|
||||
import org.springframework.context.ApplicationContext;
|
||||
import org.springframework.context.annotation.Bean;
|
||||
import org.springframework.context.annotation.Configuration;
|
||||
import org.springframework.http.HttpHeaders;
|
||||
import org.springframework.http.HttpMethod;
|
||||
import org.springframework.http.HttpStatus;
|
||||
import org.springframework.test.annotation.DirtiesContext;
|
||||
import org.springframework.test.context.junit.jupiter.SpringExtension;
|
||||
import org.springframework.test.web.client.ExpectedCount;
|
||||
import org.springframework.test.web.client.MockRestServiceServer;
|
||||
import org.springframework.web.bind.annotation.GetMapping;
|
||||
import org.springframework.web.bind.annotation.RequestMapping;
|
||||
import org.springframework.web.bind.annotation.RestController;
|
||||
import org.springframework.web.client.RestTemplate;
|
||||
import org.springframework.web.util.DefaultUriBuilderFactory;
|
||||
|
||||
import static com.tencent.cloud.rpc.enhancement.resttemplate.EnhancedRestTemplateReporter.HEADER_HAS_ERROR;
|
||||
import static com.tencent.polaris.test.common.TestUtils.SERVER_ADDRESS_ENV;
|
||||
import static org.assertj.core.api.Assertions.assertThat;
|
||||
import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
|
||||
import static org.springframework.test.web.client.match.MockRestRequestMatchers.method;
|
||||
import static org.springframework.test.web.client.match.MockRestRequestMatchers.requestTo;
|
||||
import static org.springframework.test.web.client.response.MockRestResponseCreators.withStatus;
|
||||
|
||||
/**
|
||||
* @author sean yu
|
||||
*/
|
||||
@ExtendWith(SpringExtension.class)
|
||||
@SpringBootTest(webEnvironment = RANDOM_PORT,
|
||||
classes = PolarisCircuitBreakerIntegrationTest.TestConfig.class,
|
||||
properties = {
|
||||
"spring.cloud.gateway.enabled=false",
|
||||
"feign.circuitbreaker.enabled=true",
|
||||
"spring.cloud.polaris.namespace=default",
|
||||
"spring.cloud.polaris.service=test"
|
||||
})
|
||||
@DirtiesContext
|
||||
public class PolarisCircuitBreakerIntegrationTest {
|
||||
|
||||
private static final String TEST_SERVICE_NAME = "test-service-callee";
|
||||
|
||||
private static NamingServer namingServer;
|
||||
|
||||
@AfterAll
|
||||
public static void afterAll() {
|
||||
if (null != namingServer) {
|
||||
namingServer.terminate();
|
||||
}
|
||||
}
|
||||
|
||||
@Autowired
|
||||
@Qualifier("defaultRestTemplate")
|
||||
private RestTemplate defaultRestTemplate;
|
||||
|
||||
@Autowired
|
||||
@Qualifier("restTemplateFallbackFromPolaris")
|
||||
private RestTemplate restTemplateFallbackFromPolaris;
|
||||
|
||||
@Autowired
|
||||
@Qualifier("restTemplateFallbackFromCode")
|
||||
private RestTemplate restTemplateFallbackFromCode;
|
||||
|
||||
@Autowired
|
||||
@Qualifier("restTemplateFallbackFromCode2")
|
||||
private RestTemplate restTemplateFallbackFromCode2;
|
||||
|
||||
@Autowired
|
||||
@Qualifier("restTemplateFallbackFromCode3")
|
||||
private RestTemplate restTemplateFallbackFromCode3;
|
||||
|
||||
@Autowired
|
||||
@Qualifier("restTemplateFallbackFromCode4")
|
||||
private RestTemplate restTemplateFallbackFromCode4;
|
||||
|
||||
@Autowired
|
||||
private ApplicationContext applicationContext;
|
||||
|
||||
|
||||
@Test
|
||||
public void testRestTemplate() throws URISyntaxException {
|
||||
MockRestServiceServer mockServer = MockRestServiceServer.createServer(defaultRestTemplate);
|
||||
mockServer
|
||||
.expect(ExpectedCount.once(), requestTo(new URI("http://localhost:18001/example/service/b/info")))
|
||||
.andExpect(method(HttpMethod.GET))
|
||||
.andRespond(withStatus(HttpStatus.OK).body("OK"));
|
||||
assertThat(defaultRestTemplate.getForObject("http://localhost:18001/example/service/b/info", String.class)).isEqualTo("OK");
|
||||
mockServer.verify();
|
||||
mockServer.reset();
|
||||
HttpHeaders headers = new HttpHeaders();
|
||||
headers.add(HEADER_HAS_ERROR, "true");
|
||||
// no delegateHandler in EnhancedRestTemplateReporter, so this will except err
|
||||
mockServer
|
||||
.expect(ExpectedCount.once(), requestTo(new URI("http://localhost:18001/example/service/b/info")))
|
||||
.andExpect(method(HttpMethod.GET))
|
||||
.andRespond(withStatus(HttpStatus.BAD_GATEWAY).headers(headers).body("BAD_GATEWAY"));
|
||||
assertThat(defaultRestTemplate.getForObject("http://localhost:18001/example/service/b/info", String.class)).isEqualTo("BAD_GATEWAY");
|
||||
mockServer.verify();
|
||||
mockServer.reset();
|
||||
assertThat(restTemplateFallbackFromCode.getForObject("/example/service/b/info", String.class)).isEqualTo("\"this is a fallback class\"");
|
||||
Utils.sleepUninterrupted(2000);
|
||||
assertThat(restTemplateFallbackFromCode2.getForObject("/example/service/b/info", String.class)).isEqualTo("\"this is a fallback class\"");
|
||||
Utils.sleepUninterrupted(2000);
|
||||
assertThat(restTemplateFallbackFromCode3.getForEntity("/example/service/b/info", String.class).getStatusCode()).isEqualTo(HttpStatus.OK);
|
||||
Utils.sleepUninterrupted(2000);
|
||||
assertThat(restTemplateFallbackFromCode4.getForObject("/example/service/b/info", String.class)).isEqualTo("fallback");
|
||||
Utils.sleepUninterrupted(2000);
|
||||
assertThat(restTemplateFallbackFromPolaris.getForObject("/example/service/b/info", String.class)).isEqualTo("\"fallback from polaris server\"");
|
||||
// just for code coverage
|
||||
PolarisCircuitBreakerHttpResponse response = ((CustomPolarisCircuitBreakerFallback) applicationContext.getBean("customPolarisCircuitBreakerFallback")).fallback();
|
||||
assertThat(response.getStatusText()).isEqualTo("OK");
|
||||
assertThat(response.getFallbackInfo().getCode()).isEqualTo(200);
|
||||
}
|
||||
|
||||
@Configuration
|
||||
@EnableAutoConfiguration
|
||||
@ImportAutoConfiguration({ PolarisCircuitBreakerFeignClientAutoConfiguration.class })
|
||||
@EnableFeignClients
|
||||
public static class TestConfig {
|
||||
|
||||
@Bean
|
||||
@PolarisCircuitBreaker(fallback = "fallback")
|
||||
public RestTemplate defaultRestTemplate(RpcEnhancementReporterProperties properties, ConsumerAPI consumerAPI) {
|
||||
RestTemplate defaultRestTemplate = new RestTemplate();
|
||||
EnhancedRestTemplateReporter enhancedRestTemplateReporter = new EnhancedRestTemplateReporter(properties, consumerAPI);
|
||||
defaultRestTemplate.setErrorHandler(enhancedRestTemplateReporter);
|
||||
return defaultRestTemplate;
|
||||
}
|
||||
|
||||
@Bean
|
||||
@LoadBalanced
|
||||
@PolarisCircuitBreaker
|
||||
public RestTemplate restTemplateFallbackFromPolaris() {
|
||||
DefaultUriBuilderFactory uriBuilderFactory = new DefaultUriBuilderFactory("http://" + TEST_SERVICE_NAME);
|
||||
RestTemplate restTemplate = new RestTemplate();
|
||||
restTemplate.setUriTemplateHandler(uriBuilderFactory);
|
||||
return restTemplate;
|
||||
}
|
||||
|
||||
@Bean
|
||||
@LoadBalanced
|
||||
@PolarisCircuitBreaker(fallbackClass = CustomPolarisCircuitBreakerFallback.class)
|
||||
public RestTemplate restTemplateFallbackFromCode() {
|
||||
DefaultUriBuilderFactory uriBuilderFactory = new DefaultUriBuilderFactory("http://" + TEST_SERVICE_NAME);
|
||||
RestTemplate restTemplate = new RestTemplate();
|
||||
restTemplate.setUriTemplateHandler(uriBuilderFactory);
|
||||
return restTemplate;
|
||||
}
|
||||
|
||||
@Bean
|
||||
@LoadBalanced
|
||||
@PolarisCircuitBreaker(fallbackClass = CustomPolarisCircuitBreakerFallback2.class)
|
||||
public RestTemplate restTemplateFallbackFromCode2() {
|
||||
DefaultUriBuilderFactory uriBuilderFactory = new DefaultUriBuilderFactory("http://" + TEST_SERVICE_NAME);
|
||||
RestTemplate restTemplate = new RestTemplate();
|
||||
restTemplate.setUriTemplateHandler(uriBuilderFactory);
|
||||
return restTemplate;
|
||||
}
|
||||
|
||||
@Bean
|
||||
@LoadBalanced
|
||||
@PolarisCircuitBreaker(fallbackClass = CustomPolarisCircuitBreakerFallback3.class)
|
||||
public RestTemplate restTemplateFallbackFromCode3() {
|
||||
DefaultUriBuilderFactory uriBuilderFactory = new DefaultUriBuilderFactory("http://" + TEST_SERVICE_NAME);
|
||||
RestTemplate restTemplate = new RestTemplate();
|
||||
restTemplate.setUriTemplateHandler(uriBuilderFactory);
|
||||
return restTemplate;
|
||||
}
|
||||
|
||||
@Bean
|
||||
@LoadBalanced
|
||||
@PolarisCircuitBreaker(fallback = "fallback")
|
||||
public RestTemplate restTemplateFallbackFromCode4() {
|
||||
DefaultUriBuilderFactory uriBuilderFactory = new DefaultUriBuilderFactory("http://" + TEST_SERVICE_NAME);
|
||||
RestTemplate restTemplate = new RestTemplate();
|
||||
restTemplate.setUriTemplateHandler(uriBuilderFactory);
|
||||
return restTemplate;
|
||||
}
|
||||
|
||||
@Bean
|
||||
public CustomPolarisCircuitBreakerFallback customPolarisCircuitBreakerFallback() {
|
||||
return new CustomPolarisCircuitBreakerFallback();
|
||||
}
|
||||
|
||||
@Bean
|
||||
public CustomPolarisCircuitBreakerFallback2 customPolarisCircuitBreakerFallback2() {
|
||||
return new CustomPolarisCircuitBreakerFallback2();
|
||||
}
|
||||
|
||||
@Bean
|
||||
public CustomPolarisCircuitBreakerFallback3 customPolarisCircuitBreakerFallback3() {
|
||||
return new CustomPolarisCircuitBreakerFallback3();
|
||||
}
|
||||
|
||||
@Bean
|
||||
public CircuitBreakAPI circuitBreakAPI() throws InvalidProtocolBufferException {
|
||||
try {
|
||||
namingServer = NamingServer.startNamingServer(10081);
|
||||
System.setProperty(SERVER_ADDRESS_ENV, String.format("127.0.0.1:%d", namingServer.getPort()));
|
||||
}
|
||||
catch (IOException e) {
|
||||
|
||||
}
|
||||
ServiceKey serviceKey = new ServiceKey("default", TEST_SERVICE_NAME);
|
||||
|
||||
CircuitBreakerProto.CircuitBreakerRule.Builder circuitBreakerRuleBuilder = CircuitBreakerProto.CircuitBreakerRule.newBuilder();
|
||||
InputStream inputStream = PolarisCircuitBreakerMockServerTest.class.getClassLoader().getResourceAsStream("circuitBreakerRule.json");
|
||||
String json = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8)).lines().collect(Collectors.joining(""));
|
||||
JsonFormat.parser().ignoringUnknownFields().merge(json, circuitBreakerRuleBuilder);
|
||||
CircuitBreakerProto.CircuitBreakerRule circuitBreakerRule = circuitBreakerRuleBuilder.build();
|
||||
CircuitBreakerProto.CircuitBreaker circuitBreaker = CircuitBreakerProto.CircuitBreaker.newBuilder().addRules(circuitBreakerRule).build();
|
||||
namingServer.getNamingService().setCircuitBreaker(serviceKey, circuitBreaker);
|
||||
com.tencent.polaris.api.config.Configuration configuration = TestUtils.configWithEnvAddress();
|
||||
return CircuitBreakAPIFactory.createCircuitBreakAPIByConfig(configuration);
|
||||
}
|
||||
|
||||
@RestController
|
||||
@RequestMapping("/example/service/b")
|
||||
public class ServiceBController {
|
||||
|
||||
/**
|
||||
* Get service information.
|
||||
*
|
||||
* @return service information
|
||||
*/
|
||||
@GetMapping("/info")
|
||||
public String info() {
|
||||
return "hello world ! I'm a service B1";
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
public static class CustomPolarisCircuitBreakerFallback implements PolarisCircuitBreakerFallback {
|
||||
@Override
|
||||
public PolarisCircuitBreakerHttpResponse fallback() {
|
||||
return new PolarisCircuitBreakerHttpResponse(
|
||||
200,
|
||||
new HashMap<String, String>() {{
|
||||
put("xxx", "xxx");
|
||||
}},
|
||||
"\"this is a fallback class\"");
|
||||
}
|
||||
}
|
||||
|
||||
public static class CustomPolarisCircuitBreakerFallback2 implements PolarisCircuitBreakerFallback {
|
||||
@Override
|
||||
public PolarisCircuitBreakerHttpResponse fallback() {
|
||||
return new PolarisCircuitBreakerHttpResponse(
|
||||
200,
|
||||
"\"this is a fallback class\""
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
public static class CustomPolarisCircuitBreakerFallback3 implements PolarisCircuitBreakerFallback {
|
||||
@Override
|
||||
public PolarisCircuitBreakerHttpResponse fallback() {
|
||||
return new PolarisCircuitBreakerHttpResponse(
|
||||
200
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
@ -0,0 +1,59 @@
|
||||
{
|
||||
"@type": "type.googleapis.com/v1.CircuitBreakerRule",
|
||||
"id": "5f1601f01823474d9be39c0bbb26ab87",
|
||||
"name": "test",
|
||||
"namespace": "TestCircuitBreakerRule",
|
||||
"enable": true,
|
||||
"revision": "10b120c08706429f8fdc3fb44a53224b",
|
||||
"ctime": "1754-08-31 06:49:24",
|
||||
"mtime": "2023-02-21 17:35:31",
|
||||
"etime": "",
|
||||
"description": "",
|
||||
"level": "METHOD",
|
||||
"ruleMatcher": {
|
||||
"source": {
|
||||
"service": "*",
|
||||
"namespace": "*"
|
||||
},
|
||||
"destination": {
|
||||
"service": "*",
|
||||
"namespace": "*",
|
||||
"method": {"type": "REGEX", "value": "*"}
|
||||
}
|
||||
},
|
||||
"errorConditions": [
|
||||
{
|
||||
"inputType": "RET_CODE",
|
||||
"condition": {
|
||||
"type": "NOT_EQUALS",
|
||||
"value": "200",
|
||||
"valueType": "TEXT"
|
||||
}
|
||||
}
|
||||
],
|
||||
"triggerCondition": [
|
||||
{
|
||||
"triggerType": "CONSECUTIVE_ERROR",
|
||||
"errorCount": 1,
|
||||
"errorPercent": 1,
|
||||
"interval": 5,
|
||||
"minimumRequest": 5
|
||||
}
|
||||
],
|
||||
"maxEjectionPercent": 0,
|
||||
"recoverCondition": {
|
||||
"sleepWindow": 60,
|
||||
"consecutiveSuccess": 3
|
||||
},
|
||||
"faultDetectConfig": {
|
||||
"enable": true
|
||||
},
|
||||
"fallbackConfig": {
|
||||
"enable": true,
|
||||
"response": {
|
||||
"code": 200,
|
||||
"headers": [{"key": "xxx", "value": "xxx"}],
|
||||
"body": "\"fallback from polaris server\""
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,39 @@
|
||||
/*
|
||||
* 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.feign.example;
|
||||
|
||||
import org.springframework.cloud.openfeign.FeignClient;
|
||||
import org.springframework.web.bind.annotation.GetMapping;
|
||||
|
||||
/**
|
||||
* ProviderBWithFallback.
|
||||
*
|
||||
* @author sean yu
|
||||
*/
|
||||
@FeignClient(name = "polaris-circuitbreaker-callee-service", contextId = "fallback-from-code", fallback = ProviderBFallback.class)
|
||||
public interface ProviderBWithFallback {
|
||||
|
||||
/**
|
||||
* Get info of service B.
|
||||
*
|
||||
* @return info of service B
|
||||
*/
|
||||
@GetMapping("/example/service/b/info")
|
||||
String info();
|
||||
|
||||
}
|
||||
@ -0,0 +1,43 @@
|
||||
/*
|
||||
* 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.resttemplate.example;
|
||||
|
||||
import java.util.HashMap;
|
||||
|
||||
import com.tencent.cloud.polaris.circuitbreaker.resttemplate.PolarisCircuitBreakerFallback;
|
||||
import com.tencent.cloud.polaris.circuitbreaker.resttemplate.PolarisCircuitBreakerHttpResponse;
|
||||
|
||||
import org.springframework.stereotype.Component;
|
||||
|
||||
/**
|
||||
* CustomFallback.
|
||||
*
|
||||
* @author sean yu
|
||||
*/
|
||||
@Component
|
||||
public class CustomFallback implements PolarisCircuitBreakerFallback {
|
||||
@Override
|
||||
public PolarisCircuitBreakerHttpResponse fallback() {
|
||||
return new PolarisCircuitBreakerHttpResponse(
|
||||
200,
|
||||
new HashMap<String, String>() {{
|
||||
put("Content-Type", "application/json");
|
||||
}},
|
||||
"{\"msg\": \"this is a fallback class\"}");
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue