lightloadtest.java

是离开的肌肤了卡机是离开的就富利卡及是了的开发及拉考试及的福利科技阿斯利康的肌肤莱卡及时的离开福建阿斯顿发

// ========================================================================
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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 org.mortbay.terracotta.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Random;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.mortbay.jetty.HttpMethods;
import org.mortbay.jetty.client.ContentExchange;
import org.mortbay.jetty.client.HttpClient;
import org.testng.annotations.Test;

/**
 * @version $Revision: 1457 $ $Date: 2009-02-26 09:09:48 -0600 (Thu, 26 Feb 2009) $
 */
public class LightLoadTest
{
    private boolean _stress = Boolean.getBoolean( "STRESS" );

    @Test
    public void testLightLoad()
        throws Exception
    {
        if ( _stress )
        {
            Random random = new Random( System.nanoTime() );

            String contextPath = "";
            String servletMapping = "/server";
            int port1 = random.nextInt( 50000 ) + 10000;
            TerracottaJettyServer server1 = new TerracottaJettyServer( port1 );
            server1.addContext( contextPath ).addServlet( TestServlet.class, servletMapping );
            server1.start();
            try
            {
                int port2 = random.nextInt( 50000 ) + 10000;
                TerracottaJettyServer server2 = new TerracottaJettyServer( port2 );
                server2.addContext( contextPath ).addServlet( TestServlet.class, servletMapping );
                server2.start();
                try
                {
                    HttpClient client = new HttpClient();
                    client.setConnectorType( HttpClient.CONNECTOR_SOCKET );
                    client.start();
                    try
                    {
                        String[] urls = new String[2];
                        urls[0] = "http://localhost:" + port1 + contextPath + servletMapping;
                        urls[1] = "http://localhost:" + port2 + contextPath + servletMapping;

                        ContentExchange exchange1 = new ContentExchange( true );
                        exchange1.setMethod( HttpMethods.GET );
                        exchange1.setURL( urls[0] + "?action=init" );
                        client.send( exchange1 );
                        exchange1.waitForDone();
                        assert exchange1.getResponseStatus() == HttpServletResponse.SC_OK;
                        String sessionCookie = exchange1.getResponseFields().getStringField( "Set-Cookie" );
                        assert sessionCookie != null;

                        ExecutorService executor = Executors.newCachedThreadPool();
                        int clientsCount = 50;
                        CyclicBarrier barrier = new CyclicBarrier( clientsCount + 1 );
                        int requestsCount = 100;
                        Worker[] workers = new Worker[clientsCount];
                        for ( int i = 0; i < clientsCount; ++i )
                        {
                            workers[i] = new Worker( barrier, requestsCount, sessionCookie, urls );
                            workers[i].start();
                            executor.execute( workers[i] );
                        }
                        // Wait for all workers to be ready
                        barrier.await();
                        long start = System.nanoTime();

                        // Wait for all workers to be done
                        barrier.await();
                        long end = System.nanoTime();
                        long elapsed = TimeUnit.NANOSECONDS.toMillis( end - start );
                        System.out.println( "elapsed ms: " + elapsed );

                        for ( Worker worker : workers )
                            worker.stop();
                        executor.shutdownNow();

                        // Perform one request to get the result
                        ContentExchange exchange2 = new ContentExchange( true );
                        exchange2.setMethod( HttpMethods.GET );
                        exchange2.setURL( urls[0] + "?action=result" );
                        exchange2.getRequestFields().add( "Cookie", sessionCookie );
                        client.send( exchange2 );
                        exchange2.waitForDone();
                        assert exchange2.getResponseStatus() == HttpServletResponse.SC_OK;
                        String response = exchange2.getResponseContent();
                        System.out.println( "get = " + response );
                        assert response.trim().equals( String.valueOf( clientsCount * requestsCount ) );
                    }
                    finally
                    {
                        client.stop();
                    }
                }
                finally
                {
                    server2.stop();
                }
            }
            finally
            {
                server1.stop();
            }
        }
    }

    public static class Worker
        implements Runnable
    {
        private final HttpClient client;

        private final CyclicBarrier barrier;

        private final int requestsCount;

        private final String sessionCookie;

        private final String[] urls;

        public Worker( CyclicBarrier barrier, int requestsCount, String sessionCookie, String[] urls )
        {
            this.client = new HttpClient();
            this.client.setConnectorType( HttpClient.CONNECTOR_SOCKET );
            this.barrier = barrier;
            this.requestsCount = requestsCount;
            this.sessionCookie = sessionCookie;
            this.urls = urls;
        }

        public void start()
            throws Exception
        {
            client.start();
        }

        public void stop()
            throws Exception
        {
            client.stop();
        }

        public void run()
        {
            try
            {
                // Wait for all workers to be ready
                barrier.await();

                Random random = new Random( System.nanoTime() );

                for ( int i = 0; i < requestsCount; ++i )
                {
                    int urlIndex = random.nextInt( urls.length );

                    ContentExchange exchange = new ContentExchange( true );
                    exchange.setMethod( HttpMethods.GET );
                    exchange.setURL( urls[urlIndex] + "?action=increment" );
                    exchange.getRequestFields().add( "Cookie", sessionCookie );
                    client.send( exchange );
                    exchange.waitForDone();
                    assert exchange.getResponseStatus() == HttpServletResponse.SC_OK;
                }

                // Wait for all workers to be done
                barrier.await();
            }
            catch ( Exception x )
            {
                throw new RuntimeException( x );
            }
        }
    }

    public static class TestServlet
        extends HttpServlet
    {
        @Override
        protected void doGet( HttpServletRequest request, HttpServletResponse response )
            throws ServletException, IOException
        {
            String action = request.getParameter( "action" );
            if ( "init".equals( action ) )
            {
                HttpSession session = request.getSession( true );
                session.setAttribute( "value", 0 );
            }
            else if ( "increment".equals( action ) )
            {
                // Without synchronization, because it is taken care by Jetty/Terracotta
                HttpSession session = request.getSession( false );
                int value = (Integer) session.getAttribute( "value" );
                session.setAttribute( "value", value + 1 );
            }
            else if ( "result".equals( action ) )
            {
                HttpSession session = request.getSession( false );
                int value = (Integer) session.getAttribute( "value" );
                PrintWriter writer = response.getWriter();
                writer.println( value );
                writer.flush();
            }
        }
    }
}