| /* |
| * 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.dubbo.rpc.cluster.loadbalance; |
| |
| import org.apache.dubbo.rpc.Invoker; |
| import org.apache.dubbo.rpc.RpcStatus; |
| import org.apache.dubbo.rpc.model.ApplicationModel; |
| |
| import org.junit.jupiter.api.Assertions; |
| import org.junit.jupiter.api.Test; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.ThreadLocalRandom; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import java.util.stream.IntStream; |
| |
| /** |
| * PeakEwmaLoadBalanceTest |
| */ |
| public class PeakEwmaLoadBalanceTest extends LoadBalanceBaseTest { |
| |
| private static final int THREAD_NUM = 4; |
| |
| private static final int INVOKE_NUM = 2_000; |
| |
| private static final long SHAKE_TIME = 50; |
| |
| private AtomicInteger sumInvoker1 = new AtomicInteger(0); |
| private AtomicInteger sumInvoker2 = new AtomicInteger(0); |
| private AtomicInteger sumInvoker5 = new AtomicInteger(0); |
| |
| @Test |
| public void testWithoutShake() throws InterruptedException { |
| //active -> 0 |
| RpcStatus.endCount(weightInvoker5.getUrl(), weightTestInvocation.getMethodName(), 0L, true); |
| |
| List<Callable<Boolean>> tasks = new ArrayList<>(); |
| IntStream.range(0, THREAD_NUM).forEach(e -> tasks.add(getTask(false))); |
| |
| ExecutorService executorService = Executors.newFixedThreadPool(THREAD_NUM); |
| executorService.invokeAll(tasks); |
| |
| Assertions.assertTrue(Math.abs(sumInvoker2.get() - sumInvoker1.get()) <= INVOKE_NUM); |
| } |
| |
| @Test |
| public void testWithShake() throws InterruptedException { |
| //active -> 0 |
| RpcStatus.endCount(weightInvoker5.getUrl(), weightTestInvocation.getMethodName(), 0L, true); |
| |
| List<Callable<Boolean>> tasks = new ArrayList<>(); |
| IntStream.range(0, THREAD_NUM).forEach(e -> tasks.add(getTask(true))); |
| |
| ExecutorService executorService = Executors.newFixedThreadPool(THREAD_NUM); |
| executorService.invokeAll(tasks); |
| |
| Assertions.assertTrue(sumInvoker1.get() <= INVOKE_NUM); |
| } |
| |
| private Callable<Boolean> getTask(boolean needShake) { |
| PeakEwmaLoadBalance lb = new PeakEwmaLoadBalance(); |
| lb.setApplicationModel(ApplicationModel.defaultModel()); |
| return () -> { |
| boolean needShakeTemp = needShake; |
| for (int i = 0; i < INVOKE_NUM; i++) { |
| Invoker selected = lb.select(weightInvokersSR, null, weightTestInvocation); |
| RpcStatus rpcStatus = RpcStatus.getStatus(selected.getUrl(), weightTestInvocation.getMethodName()); |
| |
| if (i > 100 && needShakeTemp && selected.getUrl().getProtocol().equals("test1")) { |
| //invoker1 shake |
| needShakeTemp = false; |
| rpcStatus.beginCount(selected.getUrl(), weightTestInvocation.getMethodName()); |
| TimeUnit.MICROSECONDS.sleep(SHAKE_TIME); |
| rpcStatus.endCount(selected.getUrl(), weightTestInvocation.getMethodName(), SHAKE_TIME, true); |
| } else { |
| rpcStatus.beginCount(selected.getUrl(), weightTestInvocation.getMethodName()); |
| long time = ThreadLocalRandom.current().nextLong(5, 10); |
| TimeUnit.MICROSECONDS.sleep(time); |
| rpcStatus.endCount(selected.getUrl(), weightTestInvocation.getMethodName(), time, true); |
| } |
| |
| if (selected.getUrl().getProtocol().equals("test1")) { |
| sumInvoker1.incrementAndGet(); |
| } |
| |
| if (selected.getUrl().getProtocol().equals("test2")) { |
| sumInvoker2.incrementAndGet(); |
| } |
| |
| if (selected.getUrl().getProtocol().equals("test5")) { |
| sumInvoker5.incrementAndGet(); |
| } |
| } |
| return true; |
| }; |
| } |
| } |