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//
//  ========================================================================
//  Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.spdy.server.http;

import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.handler.AbstractHandler;
import org.eclipse.jetty.spdy.api.ReplyInfo;
import org.eclipse.jetty.spdy.api.Session;
import org.eclipse.jetty.spdy.api.Stream;
import org.eclipse.jetty.spdy.api.StreamFrameListener;
import org.eclipse.jetty.spdy.api.SynInfo;
import org.eclipse.jetty.util.Fields;
import org.junit.Assert;
import org.junit.Test;

public class ConcurrentStreamsTest extends AbstractHTTPSPDYTest
{
    public ConcurrentStreamsTest(short version)
    {
        super(version);
    }

    @Test
    public void testSlowStreamDoesNotBlockOtherStreams() throws Exception
    {
        final CountDownLatch slowServerLatch = new CountDownLatch(1);
        final CountDownLatch fastServerLatch = new CountDownLatch(1);
        final String fastPath = "/fast";
        final String slowPath = "/slow";
        Session session = startClient(version, startHTTPServer(version, new AbstractHandler()
        {
            @Override
            public void handle(String target, Request request, HttpServletRequest httpRequest, HttpServletResponse httpResponse)
                    throws IOException, ServletException
            {
                try
                {
                    request.setHandled(true);
                    switch (target)
                    {
                        case slowPath:
                            Assert.assertTrue(fastServerLatch.await(10, TimeUnit.SECONDS));
                            slowServerLatch.countDown();
                            break;
                        case fastPath:
                            fastServerLatch.countDown();
                            break;
                        default:
                            Assert.fail();
                            break;
                    }
                }
                catch (InterruptedException x)
                {
                    throw new ServletException(x);
                }
            }
        }), null);

        // Perform slow request. This will wait on server side until the fast request wakes it up
        Fields headers = createHeaders(slowPath);
        final CountDownLatch slowClientLatch = new CountDownLatch(1);
        session.syn(new SynInfo(headers, true), new StreamFrameListener.Adapter()
        {
            @Override
            public void onReply(Stream stream, ReplyInfo replyInfo)
            {
                Fields replyHeaders = replyInfo.getHeaders();
                Assert.assertTrue(replyHeaders.get(HTTPSPDYHeader.STATUS.name(version)).value().contains("200"));
                slowClientLatch.countDown();
            }
        });

        // Perform the fast request. This will wake up the slow request
        headers = createHeaders(fastPath);
        final CountDownLatch fastClientLatch = new CountDownLatch(1);
        session.syn(new SynInfo(headers, true), new StreamFrameListener.Adapter()
        {
            @Override
            public void onReply(Stream stream, ReplyInfo replyInfo)
            {
                Fields replyHeaders = replyInfo.getHeaders();
                Assert.assertTrue(replyHeaders.get(HTTPSPDYHeader.STATUS.name(version)).value().contains("200"));
                fastClientLatch.countDown();
            }
        });

        Assert.assertTrue(fastServerLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(slowServerLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(fastClientLatch.await(5, TimeUnit.SECONDS));
        Assert.assertTrue(slowClientLatch.await(5, TimeUnit.SECONDS));
    }

    private Fields createHeaders(String path)
    {
        Fields headers = new Fields();
        headers.put(HTTPSPDYHeader.METHOD.name(version), "GET");
        headers.put(HTTPSPDYHeader.URI.name(version), path);
        headers.put(HTTPSPDYHeader.VERSION.name(version), "HTTP/1.1");
        headers.put(HTTPSPDYHeader.HOST.name(version), "localhost:" + connector.getLocalPort());
        return headers;
    }
}

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