| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.servicecomb.loadbalance; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.servicecomb.core.Invocation; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.mockito.Mockito; |
| |
| public class TestWeightedResponseTimeRuleExt { |
| @Test |
| public void testRoundRobin() { |
| WeightedResponseTimeRuleExt rule = new WeightedResponseTimeRuleExt(); |
| LoadBalancer loadBalancer = new LoadBalancer(rule, "testService"); |
| List<ServiceCombServer> servers = new ArrayList<>(); |
| Invocation invocation = Mockito.mock(Invocation.class); |
| for (int i = 0; i < 2; i++) { |
| ServiceCombServer server = Mockito.mock(ServiceCombServer.class); |
| Mockito.when(server.toString()).thenReturn("server " + i); |
| servers.add(server); |
| loadBalancer.getLoadBalancerStats().noteResponseTime(server, 1); |
| } |
| |
| AtomicInteger server1 = new AtomicInteger(0); |
| AtomicInteger server2 = new AtomicInteger(0); |
| for (int i = 0; i < 2000; i++) { |
| if (rule.choose(servers, invocation).toString().equals("server 0")) { |
| server1.incrementAndGet(); |
| } else { |
| server2.incrementAndGet(); |
| } |
| } |
| Assert.assertEquals(server1.get(), server2.get()); |
| } |
| |
| @Test |
| public void testWeighed() throws InterruptedException { |
| WeightedResponseTimeRuleExt rule = new WeightedResponseTimeRuleExt(); |
| LoadBalancer loadBalancer = new LoadBalancer(rule, "testService"); |
| List<ServiceCombServer> servers = new ArrayList<>(); |
| Invocation invocation = Mockito.mock(Invocation.class); |
| |
| ServiceCombServer server1 = Mockito.mock(ServiceCombServer.class); |
| Mockito.when(server1.toString()).thenReturn("server " + 0); |
| servers.add(server1); |
| ServiceCombServer server2 = Mockito.mock(ServiceCombServer.class); |
| Mockito.when(server2.toString()).thenReturn("server " + 1); |
| servers.add(server2); |
| |
| AtomicInteger serverCounter1 = new AtomicInteger(0); |
| AtomicInteger serverCounter2 = new AtomicInteger(0); |
| for (int i = 0; i < 2000; i++) { |
| loadBalancer.getLoadBalancerStats().noteResponseTime(server1, 20); |
| loadBalancer.getLoadBalancerStats().noteResponseTime(server2, 400); |
| Thread.sleep(1); |
| if (rule.choose(servers, invocation).toString().equals("server 0")) { |
| serverCounter1.incrementAndGet(); |
| } else { |
| serverCounter2.incrementAndGet(); |
| } |
| } |
| double percent = (double) serverCounter1.get() / (serverCounter2.get() + serverCounter1.get()); |
| System.out.println("percent" + percent); |
| Assert.assertTrue(percent > 0.60d); |
| Assert.assertTrue(percent < 0.90d); |
| serverCounter1.set(0); |
| serverCounter2.set(0); |
| |
| Thread.sleep(1000); |
| for (int i = 0; i < 2000; i++) { |
| loadBalancer.getLoadBalancerStats().noteResponseTime(server1, 20); |
| loadBalancer.getLoadBalancerStats().noteResponseTime(server2, 20); |
| Thread.sleep(1); |
| if (rule.choose(servers, invocation).toString().equals("server 0")) { |
| serverCounter1.incrementAndGet(); |
| } else { |
| serverCounter2.incrementAndGet(); |
| } |
| } |
| percent = (double) serverCounter1.get() / (serverCounter2.get() + serverCounter1.get()); |
| System.out.println("percent" + percent); |
| Assert.assertEquals(0.50d, percent, 0.2); |
| } |
| |
| @Test |
| public void testBenchmark() { |
| // 100 instances will taken less than 0.1ms. Because we use weighed rule when response time more than 10ms, |
| // This only taken 1/1000 time. |
| WeightedResponseTimeRuleExt rule = new WeightedResponseTimeRuleExt(); |
| LoadBalancer loadBalancer = new LoadBalancer(rule, "testService"); |
| List<ServiceCombServer> servers = new ArrayList<>(); |
| Invocation invocation = Mockito.mock(Invocation.class); |
| for (int i = 0; i < 100; i++) { |
| ServiceCombServer server = Mockito.mock(ServiceCombServer.class); |
| Mockito.when(server.toString()).thenReturn("server " + i); |
| servers.add(server); |
| loadBalancer.getLoadBalancerStats().noteResponseTime(server, i); |
| } |
| long begin = System.currentTimeMillis(); |
| for (int i = 0; i < 10000; i++) { |
| rule.choose(servers, invocation); |
| } |
| long taken = System.currentTimeMillis() - begin; |
| System.out.println("taken " + taken); |
| Assert.assertTrue(taken < 1000 * 5); // 5 * times make slow machine happy |
| } |
| |
| @Test |
| public void testBenchmarkRobin() { |
| // 100 instances will taken less than 0.02ms. Not as good as RoundRobinRule, which taken less than 0.001ms |
| WeightedResponseTimeRuleExt rule = new WeightedResponseTimeRuleExt(); |
| LoadBalancer loadBalancer = new LoadBalancer(rule, "testService"); |
| List<ServiceCombServer> servers = new ArrayList<>(); |
| Invocation invocation = Mockito.mock(Invocation.class); |
| for (int i = 0; i < 100; i++) { |
| ServiceCombServer server = Mockito.mock(ServiceCombServer.class); |
| Mockito.when(server.toString()).thenReturn("server " + i); |
| servers.add(server); |
| loadBalancer.getLoadBalancerStats().noteResponseTime(server, 2); |
| } |
| long begin = System.currentTimeMillis(); |
| for (int i = 0; i < 10000; i++) { |
| rule.choose(servers, invocation); |
| } |
| long taken = System.currentTimeMillis() - begin; |
| System.out.println("taken " + taken); |
| Assert.assertTrue(taken < 200 * 5); // 5 * times make slow machine happy |
| } |
| } |