edu.berkeley.sparrow.daemon.util.TestThriftClientPool.java Source code

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Here is the source code for edu.berkeley.sparrow.daemon.util.TestThriftClientPool.java

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/*
 * Copyright 2013 The Regents of The University California
 * 
 * Licensed 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 edu.berkeley.sparrow.daemon.util;

import static org.junit.Assert.*;
import static org.mockito.Mockito.*;

import java.net.InetSocketAddress;

import org.apache.commons.pool.impl.GenericKeyedObjectPool.Config;
import org.apache.thrift.async.TAsyncClient;
import org.apache.thrift.async.TAsyncClientManager;
import org.apache.thrift.protocol.TProtocolFactory;
import org.apache.thrift.transport.TNonblockingTransport;
import org.junit.Test;

import edu.berkeley.sparrow.daemon.util.ThriftClientPool.MakerFactory;

public class TestThriftClientPool {

    private class MockedMakerFactory implements MakerFactory<TAsyncClient> {
        @Override
        public TAsyncClient create(TNonblockingTransport tr, TAsyncClientManager mgr, TProtocolFactory factory) {
            return mock(TAsyncClient.class);
        }
    }

    /** Test a very common scenario where we make two thrift function calls to the same
        node in rapid succession. This test ensures that a single client is created and 
        used for both calls. */
    @Test
    public void ensureConnectionReUsed() throws Exception {
        InetSocketAddress sock = new InetSocketAddress(12345);
        ThriftClientPool<TAsyncClient> pool = new ThriftClientPool<TAsyncClient>(new MockedMakerFactory());
        assertEquals(0, pool.getNumIdle(sock));
        assertEquals(0, pool.getNumActive(sock));

        TAsyncClient client1 = pool.borrowClient(sock);

        assertEquals(0, pool.getNumIdle(sock));
        assertEquals(1, pool.getNumActive(sock));

        pool.returnClient(sock, client1);

        assertEquals(1, pool.getNumIdle(sock));
        assertEquals(0, pool.getNumActive(sock));

        TAsyncClient client2 = pool.borrowClient(sock);

        assertEquals(0, pool.getNumIdle(sock));
        assertEquals(1, pool.getNumActive(sock));

        assertEquals(client1, client2);
    }

    @Test
    public void testPoolExpiration() throws Exception {
        // Makes sure that a thrift client gets evicted (and therefore closed) if it is not 
        // used for a certain amount of time.
        Config conf = ThriftClientPool.getPoolConfig();

        // We decrease the defaults here so the test runs in reasonable time
        conf.minEvictableIdleTimeMillis = 10;
        conf.timeBetweenEvictionRunsMillis = 50;

        InetSocketAddress sock = new InetSocketAddress(12345);

        ThriftClientPool<TAsyncClient> pool = new ThriftClientPool<TAsyncClient>(new MockedMakerFactory(), conf);

        assertEquals(0, pool.getNumIdle(sock));
        assertEquals(0, pool.getNumActive(sock));

        TAsyncClient client = pool.borrowClient(sock);

        assertEquals(0, pool.getNumIdle(sock));
        assertEquals(1, pool.getNumActive(sock));

        pool.returnClient(sock, client);

        assertEquals(1, pool.getNumIdle(sock));
        assertEquals(0, pool.getNumActive(sock));

        Thread.sleep(conf.timeBetweenEvictionRunsMillis * 2);

        assertEquals(0, pool.getNumIdle(sock));
        assertEquals(0, pool.getNumActive(sock));
    }
}