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LoadBalanceTest.java
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/
LoadBalanceTest.java
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/*
* 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 com.alibaba.dubbo.rpc.cluster.loadbalance;
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.rpc.Invocation;
import com.alibaba.dubbo.rpc.Invoker;
import com.alibaba.dubbo.rpc.RpcInvocation;
import com.alibaba.dubbo.rpc.RpcStatus;
import com.alibaba.dubbo.rpc.cluster.LoadBalance;
import junit.framework.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicLong;
import static org.mockito.BDDMockito.given;
import static org.mockito.Mockito.mock;
/**
* RoundRobinLoadBalanceTest
*/
@SuppressWarnings({"unchecked", "rawtypes"})
public class LoadBalanceTest {
Invocation invocation;
List<Invoker<LoadBalanceTest>> invokers = new ArrayList<Invoker<LoadBalanceTest>>();
Invoker<LoadBalanceTest> invoker1;
Invoker<LoadBalanceTest> invoker2;
Invoker<LoadBalanceTest> invoker3;
Invoker<LoadBalanceTest> invoker4;
Invoker<LoadBalanceTest> invoker5;
RpcStatus weightTestRpcStatus1;
RpcStatus weightTestRpcStatus2;
RpcStatus weightTestRpcStatus3;
RpcInvocation weightTestInvocation;
/**
* @throws java.lang.Exception
*/
@BeforeClass
public static void setUpBeforeClass() throws Exception {
}
/**
* @throws java.lang.Exception
*/
@Before
public void setUp() throws Exception {
invocation = mock(Invocation.class);
given(invocation.getMethodName()).willReturn("method1");
invoker1 = mock(Invoker.class);
invoker2 = mock(Invoker.class);
invoker3 = mock(Invoker.class);
invoker4 = mock(Invoker.class);
invoker5 = mock(Invoker.class);
URL url1 = URL.valueOf("test://127.0.0.1:1/DemoService");
URL url2 = URL.valueOf("test://127.0.0.1:2/DemoService");
URL url3 = URL.valueOf("test://127.0.0.1:3/DemoService");
URL url4 = URL.valueOf("test://127.0.0.1:4/DemoService");
URL url5 = URL.valueOf("test://127.0.0.1:5/DemoService");
given(invoker1.isAvailable()).willReturn(true);
given(invoker1.getInterface()).willReturn(LoadBalanceTest.class);
given(invoker1.getUrl()).willReturn(url1);
given(invoker2.isAvailable()).willReturn(true);
given(invoker2.getInterface()).willReturn(LoadBalanceTest.class);
given(invoker2.getUrl()).willReturn(url2);
given(invoker3.isAvailable()).willReturn(true);
given(invoker3.getInterface()).willReturn(LoadBalanceTest.class);
given(invoker3.getUrl()).willReturn(url3);
given(invoker4.isAvailable()).willReturn(true);
given(invoker4.getInterface()).willReturn(LoadBalanceTest.class);
given(invoker4.getUrl()).willReturn(url4);
given(invoker5.isAvailable()).willReturn(true);
given(invoker5.getInterface()).willReturn(LoadBalanceTest.class);
given(invoker5.getUrl()).willReturn(url5);
invokers.add(invoker1);
invokers.add(invoker2);
invokers.add(invoker3);
invokers.add(invoker4);
invokers.add(invoker5);
}
@Test
public void testRoundRobinLoadBalance_select() {
int runs = 10000;
Map<Invoker, AtomicLong> counter = getInvokeCounter(runs, RoundRobinLoadBalance.NAME);
for (Invoker minvoker : counter.keySet()) {
Long count = counter.get(minvoker).get();
Assert.assertTrue("abs diff shoud < 1", Math.abs(count - runs / (0f + invokers.size())) < 1f);
}
}
@Test
public void testSelectByWeightLeastActive() {
int sumInvoker1 = 0;
int sumInvoker2 = 0;
int loop = 10000;
LeastActiveLoadBalance lb = new LeastActiveLoadBalance();
for (int i = 0; i < loop; i++) {
Invoker selected = lb.select(weightInvokers, null, weightTestInvocation);
if (selected.getUrl().getProtocol().equals("test1")) {
sumInvoker1++;
}
if (selected.getUrl().getProtocol().equals("test2")) {
sumInvoker2++;
}
// never select invoker3 because it's active is more than invoker1 and invoker2
Assert.assertTrue("select is not the least active one", !selected.getUrl().getProtocol().equals("test3"));
}
// the sumInvoker1 : sumInvoker2 approximately equal to 1: 9
System.out.println(sumInvoker1);
System.out.println(sumInvoker2);
Assert.assertEquals("select failed!", sumInvoker1 + sumInvoker2, loop);
}
@Test
public void testSelectByWeightRandom() {
int sumInvoker1 = 0;
int sumInvoker2 = 0;
int sumInvoker3 = 0;
int loop = 10000;
RandomLoadBalance lb = new RandomLoadBalance();
for (int i = 0; i < loop; i++) {
Invoker selected = lb.select(weightInvokers, null, weightTestInvocation);
if (selected.getUrl().getProtocol().equals("test1")) {
sumInvoker1++;
}
if (selected.getUrl().getProtocol().equals("test2")) {
sumInvoker2++;
}
if (selected.getUrl().getProtocol().equals("test3")) {
sumInvoker3++;
}
}
// 1 : 9 : 6
System.out.println(sumInvoker1);
System.out.println(sumInvoker2);
System.out.println(sumInvoker3);
Assert.assertEquals("select failed!", sumInvoker1 + sumInvoker2 + sumInvoker3, loop);
}
@Test
public void testSelectByWeight() {
int sumInvoker1 = 0;
int sumInvoker2 = 0;
int sumInvoker3 = 0;
int loop = 10000;
RoundRobinLoadBalance lb = new RoundRobinLoadBalance();
for (int i = 0; i < loop; i++) {
Invoker selected = lb.select(weightInvokers, null, weightTestInvocation);
if (selected.getUrl().getProtocol().equals("test1")) {
sumInvoker1++;
}
if (selected.getUrl().getProtocol().equals("test2")) {
sumInvoker2++;
}
if (selected.getUrl().getProtocol().equals("test3")) {
sumInvoker3++;
}
}
// 1 : 9 : 6
System.out.println(sumInvoker1);
System.out.println(sumInvoker2);
System.out.println(sumInvoker3);
Assert.assertEquals("select failed!", sumInvoker1 + sumInvoker2 + sumInvoker3, loop);
}
@Test
public void testRandomLoadBalance_select() {
int runs = 1000;
Map<Invoker, AtomicLong> counter = getInvokeCounter(runs, RandomLoadBalance.NAME);
for (Invoker minvoker : counter.keySet()) {
Long count = counter.get(minvoker).get();
// System.out.println(count);
Assert.assertTrue("abs diff shoud < avg",
Math.abs(count - runs / (0f + invokers.size())) < runs / (0f + invokers.size()));
}
for (int i = 0; i < 5; i++) {
for (int j = 0; j <= i; j++) {
RpcStatus.beginCount(invokers.get(i).getUrl(), invocation.getMethodName());
}
}
counter = getInvokeCounter(runs, LeastActiveLoadBalance.NAME);
for (Invoker minvoker : counter.keySet()) {
Long count = counter.get(minvoker).get();
}
Assert.assertEquals(runs, counter.get(invoker1).intValue());
Assert.assertEquals(0, counter.get(invoker2).intValue());
Assert.assertEquals(0, counter.get(invoker3).intValue());
Assert.assertEquals(0, counter.get(invoker4).intValue());
Assert.assertEquals(0, counter.get(invoker5).intValue());
}
@Test
public void testLeastActiveLoadBalance_select() {
int runs = 10000;
Map<Invoker, AtomicLong> counter = getInvokeCounter(runs, LeastActiveLoadBalance.NAME);
for (Invoker minvoker : counter.keySet()) {
Long count = counter.get(minvoker).get();
// System.out.println(count);
Assert.assertTrue("abs diff shoud < avg",
Math.abs(count - runs / (0f + invokers.size())) < runs / (0f + invokers.size()));
}
}
public Map<Invoker, AtomicLong> getInvokeCounter(int runs, String loadbalanceName) {
Map<Invoker, AtomicLong> counter = new ConcurrentHashMap<Invoker, AtomicLong>();
LoadBalance lb = ExtensionLoader.getExtensionLoader(LoadBalance.class).getExtension(loadbalanceName);
for (Invoker invoker : invokers) {
counter.put(invoker, new AtomicLong(0));
}
for (int i = 0; i < runs; i++) {
Invoker sinvoker = lb.select(invokers, invokers.get(0).getUrl(), invocation);
counter.get(sinvoker).incrementAndGet();
}
return counter;
}
@Test
public void testLoadBalanceWarmup() {
Assert.assertEquals(1,
AbstractLoadBalance.calculateWarmupWeight(0, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(1,
AbstractLoadBalance.calculateWarmupWeight(13, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(1,
AbstractLoadBalance.calculateWarmupWeight(6 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(2,
AbstractLoadBalance.calculateWarmupWeight(12 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(10,
AbstractLoadBalance.calculateWarmupWeight(60 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(50, AbstractLoadBalance
.calculateWarmupWeight(5 * 60 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(50, AbstractLoadBalance
.calculateWarmupWeight(5 * 60 * 1000 + 23, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(50, AbstractLoadBalance
.calculateWarmupWeight(5 * 60 * 1000 + 5999, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(51, AbstractLoadBalance
.calculateWarmupWeight(5 * 60 * 1000 + 6000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(90, AbstractLoadBalance
.calculateWarmupWeight(9 * 60 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(98, AbstractLoadBalance
.calculateWarmupWeight(10 * 60 * 1000 - 12 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(99, AbstractLoadBalance
.calculateWarmupWeight(10 * 60 * 1000 - 6 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(100, AbstractLoadBalance
.calculateWarmupWeight(10 * 60 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
Assert.assertEquals(100, AbstractLoadBalance
.calculateWarmupWeight(20 * 60 * 1000, Constants.DEFAULT_WARMUP, Constants.DEFAULT_WEIGHT));
}
/*------------------------------------test invokers for weight---------------------------------------*/
protected List<Invoker<LoadBalanceTest>> weightInvokers = new ArrayList<Invoker<LoadBalanceTest>>();
protected Invoker<LoadBalanceTest> weightInvoker1;
protected Invoker<LoadBalanceTest> weightInvoker2;
protected Invoker<LoadBalanceTest> weightInvoker3;
@Before
public void before() throws Exception {
weightInvoker1 = mock(Invoker.class);
weightInvoker2 = mock(Invoker.class);
weightInvoker3 = mock(Invoker.class);
weightTestInvocation = new RpcInvocation();
weightTestInvocation.setMethodName("test");
URL url1 = URL.valueOf("test1://0:1/DemoService");
url1 = url1.addParameter(Constants.WEIGHT_KEY, 1);
url1 = url1.addParameter(weightTestInvocation.getMethodName() + "." + Constants.WEIGHT_KEY, 1);
url1 = url1.addParameter("active", 0);
URL url2 = URL.valueOf("test2://0:9/DemoService");
url2 = url2.addParameter(Constants.WEIGHT_KEY, 9);
url2 = url2.addParameter(weightTestInvocation.getMethodName() + "." + Constants.WEIGHT_KEY, 9);
url2 = url2.addParameter("active", 0);
URL url3 = URL.valueOf("test3://1:6/DemoService");
url3 = url3.addParameter(Constants.WEIGHT_KEY, 6);
url3 = url3.addParameter(weightTestInvocation.getMethodName() + "." + Constants.WEIGHT_KEY, 6);
url3 = url3.addParameter("active", 1);
given(weightInvoker1.isAvailable()).willReturn(true);
given(weightInvoker1.getUrl()).willReturn(url1);
given(weightInvoker2.isAvailable()).willReturn(true);
given(weightInvoker2.getUrl()).willReturn(url2);
given(weightInvoker3.isAvailable()).willReturn(true);
given(weightInvoker3.getUrl()).willReturn(url3);
weightInvokers.add(weightInvoker1);
weightInvokers.add(weightInvoker2);
weightInvokers.add(weightInvoker3);
weightTestRpcStatus1 = RpcStatus.getStatus(weightInvoker1.getUrl(), weightTestInvocation.getMethodName());
weightTestRpcStatus2 = RpcStatus.getStatus(weightInvoker2.getUrl(), weightTestInvocation.getMethodName());
weightTestRpcStatus3 = RpcStatus.getStatus(weightInvoker3.getUrl(), weightTestInvocation.getMethodName());
// weightTestRpcStatus3 active is 1
RpcStatus.beginCount(weightInvoker3.getUrl(), weightTestInvocation.getMethodName());
}
}