// ========================================================================
// 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: 1645 $ $Date: 2009-09-15 20:31:07 +1000 (Tue, 15 Sep 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;
// Mangle the cookie, replacing Path with $Path, etc.
sessionCookie = sessionCookie.replaceFirst("(\\W)(P|p)ath=", "$1\\$Path=");
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();
}
}
}
}