001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.ipc;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021import static org.mockito.Mockito.doAnswer;
022import static org.mockito.Mockito.mock;
023import static org.mockito.Mockito.when;
024
025import java.io.IOException;
026import java.lang.reflect.Field;
027import java.net.InetSocketAddress;
028import java.util.concurrent.ThreadPoolExecutor;
029import java.util.concurrent.TimeUnit;
030import java.util.concurrent.atomic.AtomicInteger;
031import org.apache.hadoop.conf.Configuration;
032import org.apache.hadoop.hbase.HBaseConfiguration;
033import org.apache.hadoop.hbase.monitoring.MonitoredRPCHandlerImpl;
034import org.apache.hadoop.hbase.testclassification.RPCTests;
035import org.apache.hadoop.hbase.testclassification.SmallTests;
036import org.junit.jupiter.api.BeforeEach;
037import org.junit.jupiter.api.Tag;
038import org.junit.jupiter.api.Test;
039import org.mockito.invocation.InvocationOnMock;
040import org.mockito.stubbing.Answer;
041import org.slf4j.Logger;
042import org.slf4j.LoggerFactory;
043
044@Tag(RPCTests.TAG)
045@Tag(SmallTests.TAG)
046public class TestFifoRpcScheduler {
047
048  private static final Logger LOG = LoggerFactory.getLogger(TestFifoRpcScheduler.class);
049
050  private AtomicInteger callExecutionCount;
051
052  private final RpcScheduler.Context CONTEXT = new RpcScheduler.Context() {
053    @Override
054    public InetSocketAddress getListenerAddress() {
055      return InetSocketAddress.createUnresolved("127.0.0.1", 1000);
056    }
057  };
058  private Configuration conf;
059
060  @BeforeEach
061  public void setUp() {
062    conf = HBaseConfiguration.create();
063    callExecutionCount = new AtomicInteger(0);
064  }
065
066  private ThreadPoolExecutor disableHandlers(RpcScheduler scheduler) {
067    ThreadPoolExecutor rpcExecutor = null;
068
069    try {
070      Field ExecutorField = scheduler.getClass().getDeclaredField("executor");
071      ExecutorField.setAccessible(true);
072
073      scheduler.start();
074      rpcExecutor = (ThreadPoolExecutor) ExecutorField.get(scheduler);
075
076      rpcExecutor.setMaximumPoolSize(1);
077      rpcExecutor.allowCoreThreadTimeOut(true);
078      rpcExecutor.setCorePoolSize(0);
079      rpcExecutor.setKeepAliveTime(1, TimeUnit.MICROSECONDS);
080
081      // Wait for 2 seconds, so that idle threads will die
082      Thread.sleep(2000);
083
084    } catch (NoSuchFieldException e) {
085      LOG.error("No such field exception:" + e);
086    } catch (IllegalAccessException e) {
087      LOG.error("Illegal access exception:" + e);
088    } catch (InterruptedException e) {
089      LOG.error("Interrupted exception:" + e);
090    }
091
092    return rpcExecutor;
093  }
094
095  @Test
096  public void testCallQueueInfo() throws IOException, InterruptedException {
097
098    ThreadPoolExecutor rpcExecutor;
099    RpcScheduler scheduler = new FifoRpcScheduler(conf, 1);
100
101    scheduler.init(CONTEXT);
102
103    // Set number of handlers to a minimum value
104    disableHandlers(scheduler);
105
106    int totalCallMethods = 30;
107    int unableToDispatch = 0;
108
109    for (int i = totalCallMethods; i > 0; i--) {
110      CallRunner task = createMockTask();
111      task.setStatus(new MonitoredRPCHandlerImpl("test"));
112
113      if (!scheduler.dispatch(task)) {
114        unableToDispatch++;
115      }
116
117      Thread.sleep(10);
118    }
119
120    CallQueueInfo callQueueInfo = scheduler.getCallQueueInfo();
121    int executionCount = callExecutionCount.get();
122    int callQueueSize = 0;
123
124    for (String callQueueName : callQueueInfo.getCallQueueNames()) {
125      for (String calledMethod : callQueueInfo.getCalledMethodNames(callQueueName)) {
126        callQueueSize += callQueueInfo.getCallMethodCount(callQueueName, calledMethod);
127      }
128    }
129
130    assertEquals(totalCallMethods - unableToDispatch, callQueueSize + executionCount);
131
132    scheduler.stop();
133  }
134
135  private CallRunner createMockTask() {
136    ServerCall call = mock(ServerCall.class);
137    CallRunner task = mock(CallRunner.class);
138    when(task.getRpcCall()).thenReturn(call);
139
140    doAnswer(new Answer<Void>() {
141      @Override
142      public Void answer(InvocationOnMock invocation) throws Throwable {
143        callExecutionCount.incrementAndGet();
144        Thread.sleep(1000);
145        return null;
146      }
147    }).when(task).run();
148
149    return task;
150  }
151
152}