org.apache.hadoop.hbase.ipc.TestFifoRpcScheduler.java Source code

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Here is the source code for org.apache.hadoop.hbase.ipc.TestFifoRpcScheduler.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 org.apache.hadoop.hbase.ipc;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.CategoryBasedTimeout;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.monitoring.MonitoredRPCHandlerImpl;
import org.apache.hadoop.hbase.testclassification.LargeTests;
import org.apache.hadoop.hbase.testclassification.RPCTests;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.rules.TestRule;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;

import java.io.IOException;
import java.lang.reflect.Field;
import java.net.InetSocketAddress;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

@Category({ RPCTests.class, LargeTests.class })
public class TestFifoRpcScheduler {
    @Rule
    public final TestRule timeout = CategoryBasedTimeout.builder().withTimeout(this.getClass())
            .withLookingForStuckThread(true).build();

    private static final Log LOG = LogFactory.getLog(TestFifoRpcScheduler.class);

    private AtomicInteger callExecutionCount;

    private final RpcScheduler.Context CONTEXT = new RpcScheduler.Context() {
        @Override
        public InetSocketAddress getListenerAddress() {
            return InetSocketAddress.createUnresolved("127.0.0.1", 1000);
        }
    };
    private Configuration conf;

    @Before
    public void setUp() {
        conf = HBaseConfiguration.create();
        callExecutionCount = new AtomicInteger(0);
    }

    private ThreadPoolExecutor disableHandlers(RpcScheduler scheduler) {
        ThreadPoolExecutor rpcExecutor = null;

        try {
            Field ExecutorField = scheduler.getClass().getDeclaredField("executor");
            ExecutorField.setAccessible(true);

            scheduler.start();
            rpcExecutor = (ThreadPoolExecutor) ExecutorField.get(scheduler);

            rpcExecutor.setMaximumPoolSize(1);
            rpcExecutor.allowCoreThreadTimeOut(true);
            rpcExecutor.setCorePoolSize(0);
            rpcExecutor.setKeepAliveTime(1, TimeUnit.MICROSECONDS);

            // Wait for 2 seconds, so that idle threads will die
            Thread.sleep(2000);

        } catch (NoSuchFieldException e) {
            LOG.error("No such field exception:" + e);
        } catch (IllegalAccessException e) {
            LOG.error("Illegal access exception:" + e);
        } catch (InterruptedException e) {
            LOG.error("Interrupted exception:" + e);
        }

        return rpcExecutor;
    }

    @Test
    public void testCallQueueInfo() throws IOException, InterruptedException {

        ThreadPoolExecutor rpcExecutor;
        RpcScheduler scheduler = new FifoRpcScheduler(conf, 1);

        scheduler.init(CONTEXT);

        // Set number of handlers to a minimum value
        disableHandlers(scheduler);

        int totalCallMethods = 30;
        int unableToDispatch = 0;

        for (int i = totalCallMethods; i > 0; i--) {
            CallRunner task = createMockTask();
            task.setStatus(new MonitoredRPCHandlerImpl());

            if (!scheduler.dispatch(task)) {
                unableToDispatch++;
            }

            Thread.sleep(10);
        }

        CallQueueInfo callQueueInfo = scheduler.getCallQueueInfo();
        int executionCount = callExecutionCount.get();
        int callQueueSize = 0;

        for (String callQueueName : callQueueInfo.getCallQueueNames()) {
            for (String calledMethod : callQueueInfo.getCalledMethodNames(callQueueName)) {
                callQueueSize += callQueueInfo.getCallMethodCount(callQueueName, calledMethod);
            }
        }

        assertEquals(totalCallMethods - unableToDispatch, callQueueSize + executionCount);

        scheduler.stop();
    }

    private CallRunner createMockTask() {
        ServerCall call = mock(ServerCall.class);
        CallRunner task = mock(CallRunner.class);
        when(task.getRpcCall()).thenReturn(call);

        doAnswer(new Answer<Void>() {
            @Override
            public Void answer(InvocationOnMock invocation) throws Throwable {
                callExecutionCount.incrementAndGet();
                Thread.sleep(1000);
                return null;
            }
        }).when(task).run();

        return task;
    }

}