132 lines
5.4 KiB
Java
132 lines
5.4 KiB
Java
/**
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* Copyright (c) 2018-2028, Chill Zhuang 庄骞 (smallchill@163.com).
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* <p>
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* Licensed under the GNU LESSER GENERAL PUBLIC 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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* <p>
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* http://www.gnu.org/licenses/lgpl.html
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* <p>
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springblade.core.boot.feign;
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import com.netflix.hystrix.HystrixThreadPoolKey;
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import com.netflix.hystrix.HystrixThreadPoolProperties;
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import com.netflix.hystrix.strategy.HystrixPlugins;
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import com.netflix.hystrix.strategy.concurrency.HystrixConcurrencyStrategy;
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import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariable;
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import com.netflix.hystrix.strategy.concurrency.HystrixRequestVariableLifecycle;
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import com.netflix.hystrix.strategy.eventnotifier.HystrixEventNotifier;
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import com.netflix.hystrix.strategy.executionhook.HystrixCommandExecutionHook;
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import com.netflix.hystrix.strategy.metrics.HystrixMetricsPublisher;
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import com.netflix.hystrix.strategy.properties.HystrixPropertiesStrategy;
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import com.netflix.hystrix.strategy.properties.HystrixProperty;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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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 java.util.concurrent.BlockingQueue;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ThreadPoolExecutor;
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import java.util.concurrent.TimeUnit;
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/**
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* 自定义Feign的隔离策略
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*/
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public class FeignHystrixConcurrencyStrategy extends HystrixConcurrencyStrategy {
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private static final Logger log = LoggerFactory.getLogger(FeignHystrixConcurrencyStrategy.class);
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private HystrixConcurrencyStrategy delegate;
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public FeignHystrixConcurrencyStrategy() {
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try {
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this.delegate = HystrixPlugins.getInstance().getConcurrencyStrategy();
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if (this.delegate instanceof FeignHystrixConcurrencyStrategy) {
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// Welcome to singleton hell...
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return;
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}
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HystrixCommandExecutionHook commandExecutionHook =
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HystrixPlugins.getInstance().getCommandExecutionHook();
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HystrixEventNotifier eventNotifier = HystrixPlugins.getInstance().getEventNotifier();
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HystrixMetricsPublisher metricsPublisher = HystrixPlugins.getInstance().getMetricsPublisher();
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HystrixPropertiesStrategy propertiesStrategy =
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HystrixPlugins.getInstance().getPropertiesStrategy();
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this.logCurrentStateOfHystrixPlugins(eventNotifier, metricsPublisher, propertiesStrategy);
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HystrixPlugins.reset();
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HystrixPlugins.getInstance().registerConcurrencyStrategy(this);
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HystrixPlugins.getInstance().registerCommandExecutionHook(commandExecutionHook);
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HystrixPlugins.getInstance().registerEventNotifier(eventNotifier);
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HystrixPlugins.getInstance().registerMetricsPublisher(metricsPublisher);
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HystrixPlugins.getInstance().registerPropertiesStrategy(propertiesStrategy);
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} catch (Exception e) {
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log.error("Failed to register Sleuth Hystrix Concurrency Strategy", e);
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}
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}
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private void logCurrentStateOfHystrixPlugins(HystrixEventNotifier eventNotifier,
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HystrixMetricsPublisher metricsPublisher, HystrixPropertiesStrategy propertiesStrategy) {
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if (log.isDebugEnabled()) {
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log.debug("Current Hystrix plugins configuration is [" + "concurrencyStrategy ["
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+ this.delegate + "]," + "eventNotifier [" + eventNotifier + "]," + "metricPublisher ["
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+ metricsPublisher + "]," + "propertiesStrategy [" + propertiesStrategy + "]," + "]");
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log.debug("Registering Sleuth Hystrix Concurrency Strategy.");
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}
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}
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@Override
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public <T> Callable<T> wrapCallable(Callable<T> callable) {
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RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
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return new WrappedCallable<>(callable, requestAttributes);
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}
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@Override
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public ThreadPoolExecutor getThreadPool(HystrixThreadPoolKey threadPoolKey,
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HystrixProperty<Integer> corePoolSize, HystrixProperty<Integer> maximumPoolSize,
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HystrixProperty<Integer> keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue) {
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return this.delegate.getThreadPool(threadPoolKey, corePoolSize, maximumPoolSize, keepAliveTime,
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unit, workQueue);
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}
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@Override
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public ThreadPoolExecutor getThreadPool(HystrixThreadPoolKey threadPoolKey,
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HystrixThreadPoolProperties threadPoolProperties) {
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return this.delegate.getThreadPool(threadPoolKey, threadPoolProperties);
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}
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@Override
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public BlockingQueue<Runnable> getBlockingQueue(int maxQueueSize) {
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return this.delegate.getBlockingQueue(maxQueueSize);
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}
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@Override
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public <T> HystrixRequestVariable<T> getRequestVariable(HystrixRequestVariableLifecycle<T> rv) {
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return this.delegate.getRequestVariable(rv);
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}
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static class WrappedCallable<T> implements Callable<T> {
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private final Callable<T> target;
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private final RequestAttributes requestAttributes;
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public WrappedCallable(Callable<T> target, RequestAttributes requestAttributes) {
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this.target = target;
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this.requestAttributes = requestAttributes;
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}
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@Override
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public T call() throws Exception {
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try {
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RequestContextHolder.setRequestAttributes(requestAttributes);
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return target.call();
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} finally {
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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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