我怎么可以测试，如果我连接池的工作是在正确方式吗？

Question

我执行一个肥皂客户使用Apache轴2.由于肥皂客户必须处理大量数目的请求我使用一个连接池。

要做到这我已经设置一些运输层结构的我的存根，这是产生从WSDL文件：

stub._getServiceClient().getOptions().setProperty(HTTPConstants.REUSE_HTTP_CLIENT, Constants.VALUE_TRUE);

MultiThreadedHttpConnectionManager connectionManager = new MultiThreadedHttpConnectionManager();
connectionManager.getParams().setDefaultMaxConnectionsPerHost(MAX_CONNECTIONS_PER_HOST);
connectionManager.closeIdleConnections(IDLE_CONNECTION_TIMEOUT);
HttpClient httpClient = new HttpClient(connectionManager);

stub._getServiceClient().getOptions().setProperty(HTTPConstants.CACHED_HTTP_CLIENT, httpClient);

我的客户似乎是工作就好了。但是，我想知道我怎么可以测试，如果连接池的工作是在正确的方式(即创建连接仅破坏之后的时间限定的IDLE_CONNECTION_TIMEOUT定)。任何想法？

Answer 1

基于JUnit的3.x的伪代码：

  setUp() {
    initialize connection manager;
    initialize connection by creating client;
  }

  tearDown() {
    close connection if necessary;
    close connection manager if necessary;
  }

  testConnectionOpen() {
    assert that connection is open;
    pause for time of idle connection timeout - 1 second;
    assert that connection **is still open**;
  }

  testConnectionClosed() {
    assert that connection is open;
    pause for time of idle connection timeout + 1 second;
    assert that connection **is closed**;
  }

添加1秒，减去1秒应当根据连接管理器的灵敏度进行调整。

Answer 2

写测试台应用程序，它将使大量请求的，并且断言，连接的数量是从不超过MAX_CONNECTIONS。你可能能够通过VisualVM的附着JConsole的或到处理以核实后者。

您也可以考虑使用雅加达的JMeter ，在类/客户端生成负载，并且然后绘图出几个数据点（不知道你会如何获取客户端创建连接数，虽然）。

Answer 3

你可以测试通过改变的参数

• NO_OF_THREADS
• POOL_SIZE
• ENABLE_CONNECTION_POOLING

---

/** number of concurrent searches */
private static final int NO_OF_THREADS = 20;

/** size of the http connection pool */
private static final int POOL_SIZE = 20;

/** enabling or disabling the connection pool */
private static boolean ENABLE_CONNECTION_POOLING = true;

/** close idle connection time in milliseconds
 * connections will be release if they are idle for this time */
private static int CLOSE_IDLE_CONNECTION_TIME = 1000;

public void test()
{
    init();

    long start = System.currentTimeMillis();

    List<Thread> threads = new ArrayList<Thread>();
    for ( int i = 0; i < NO_OF_THREADS; i++ )
    {
        SimpleThread thread = new SimpleThread();
        thread.start();

        threads.add( thread );
    }

    for ( Thread t : threads )
    {
        try
        {
            t.join();
        }
        catch ( InterruptedException e )
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    logger.info( "************* Test Finish In *******************" + ( System.currentTimeMillis() - start ) + " ms" );
}

public void init()
{
    super.init();

    try
    {
        long t1 = System.currentTimeMillis();
        stub = new Viva_x0020_external_x0020_API_x0020_for_x0020_partnersStub( endUrl );

        if ( ENABLE_CONNECTION_POOLING )
        {
            stub._getServiceClient().getOptions().setProperty( HTTPConstants.REUSE_HTTP_CLIENT, Constants.VALUE_TRUE );
            MultiThreadedHttpConnectionManager connectionManager = new MultiThreadedHttpConnectionManager();
            connectionManager.getParams().setDefaultMaxConnectionsPerHost( POOL_SIZE );
            connectionManager.closeIdleConnections( CLOSE_IDLE_CONNECTION_TIME );
            HttpClient httpClient = new HttpClient( connectionManager );
            stub._getServiceClient().getOptions().setProperty( HTTPConstants.CACHED_HTTP_CLIENT, httpClient );
        }

        logger.info( "Connection Established in " + ( System.currentTimeMillis() - t1 ) + "ms" );
    }
    catch ( AxisFault e1 )
    {
        e1.printStackTrace();
        fail( "Error on creating the stub" );
    }

    logger.info( "Connection Initialized successfully" );
}

public class SimpleThread extends Thread
{
    public void run()
    {
        search();
    }
}

private static void search()
{
    logger.info( "$$$$$$$$$$$$$ Start the Search $$$$$$$$$$$$$$" );
    GetAirportConnections request = new GetAirportConnections();
    request.setAirportCode( "MTY" );

    GetAirportConnectionsResponse response = null;
    try
    {
        long t1 = System.currentTimeMillis();
        response = stub.getAirportConnections( request, getUserCredentials() );
        logger.info( "Results Retrived in " + ( System.currentTimeMillis() - t1 ) + "ms" );
    }
    catch ( Exception e )
    {
        logger.error( "------------------------- Connection Timeout --------------------------" );
        e.printStackTrace();
        fail( e.getMessage() );
    }

    Airport[] airports = response.getGetAirportConnectionsResult().getAirport();
    logger.info("Number of airports : " + airports.length );
}

}