| /* |
| * 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.common.URL; |
| import org.apache.dubbo.rpc.Invoker; |
| import org.apache.dubbo.rpc.cluster.LoadBalance; |
| import org.apache.dubbo.rpc.cluster.RouterChain; |
| import org.apache.dubbo.rpc.cluster.router.state.BitList; |
| |
| import org.junit.jupiter.api.Assertions; |
| import org.junit.jupiter.api.Test; |
| |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| @SuppressWarnings("rawtypes") |
| public class ConsistentHashLoadBalanceTest extends LoadBalanceBaseTest { |
| |
| @Test |
| public void testConsistentHashLoadBalance() { |
| int runs = 10000; |
| long unHitedInvokerCount = 0; |
| Map<Invoker, Long> hitedInvokers = new HashMap<>(); |
| Map<Invoker, AtomicLong> counter = getInvokeCounter(runs, ConsistentHashLoadBalance.NAME); |
| for (Invoker minvoker : counter.keySet()) { |
| Long count = counter.get(minvoker).get(); |
| |
| if (count == 0) { |
| unHitedInvokerCount++; |
| } else { |
| hitedInvokers.put(minvoker, count); |
| } |
| } |
| |
| Assertions.assertEquals(counter.size() - 1, |
| unHitedInvokerCount, "the number of unHitedInvoker should be counter.size() - 1"); |
| Assertions.assertEquals(1, hitedInvokers.size(), "the number of hitedInvoker should be 1"); |
| Assertions.assertEquals(runs, |
| hitedInvokers.values().iterator().next().intValue(), "the number of hited count should be the number of runs"); |
| } |
| |
| // https://github.com/apache/dubbo/issues/5429 |
| @Test |
| void testNormalWhenRouterEnabled() { |
| LoadBalance lb = getLoadBalance(ConsistentHashLoadBalance.NAME); |
| URL url = invokers.get(0).getUrl(); |
| RouterChain<LoadBalanceBaseTest> routerChain = RouterChain.buildChain(LoadBalanceBaseTest.class, url); |
| Invoker<LoadBalanceBaseTest> result = lb.select(invokers, url, invocation); |
| |
| for (int i = 0; i < 100; i++) { |
| routerChain.setInvokers(new BitList<>(invokers)); |
| List<Invoker<LoadBalanceBaseTest>> routeInvokers = routerChain.route(url, new BitList<>(invokers), invocation); |
| Invoker<LoadBalanceBaseTest> finalInvoker = lb.select(routeInvokers, url, invocation); |
| Assertions.assertEquals(result, finalInvoker); |
| } |
| } |
| } |