fixed finger trouble bugs

This commit is contained in:
Greg Wilkins 2015-02-05 09:36:05 +11:00
parent 2971f868d5
commit 1576c68a52
1 changed files with 107 additions and 0 deletions

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//
// ========================================================================
// Copyright (c) 1995-2015 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.embedded;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.servlet.AsyncContext;
import javax.servlet.ReadListener;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.WriteListener;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AsyncEchoServlet extends HttpServlet
{
@Override
protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
AsyncContext asyncContext = request.startAsync(request, response);
asyncContext.setTimeout(0);
Echoer echoer = new Echoer(asyncContext);
request.getInputStream().setReadListener(echoer);
response.getOutputStream().setWriteListener(echoer);
}
private class Echoer implements ReadListener, WriteListener
{
private final byte[] buffer = new byte[4096];
private final AsyncContext asyncContext;
private final ServletInputStream input;
private final ServletOutputStream output;
private final AtomicBoolean complete = new AtomicBoolean(false);
private Echoer(AsyncContext asyncContext) throws IOException
{
this.asyncContext = asyncContext;
this.input = asyncContext.getRequest().getInputStream();
this.output = asyncContext.getResponse().getOutputStream();
}
@Override
public void onDataAvailable() throws IOException
{
onWritePossible();
}
@Override
public void onAllDataRead() throws IOException
{
onWritePossible();
}
@Override
public void onWritePossible() throws IOException
{
// This method is called:
// 1) after first registering a WriteListener (ready for first write)
// 2) after first registering a ReadListener iff write is ready
// 3) when a previous write completes after an output.isReady() returns false
// 4) from an input callback
// We should try to read, only if we are able to write!
while (output.isReady() && input.isReady())
{
int read = input.read(buffer);
if (read<0)
{
if (complete.compareAndSet(false,true))
asyncContext.complete();
break;
}
else if (read>0)
{
output.write(buffer, 0, read);
}
}
}
@Override
public void onError(Throwable failure)
{
failure.printStackTrace();
asyncContext.complete();
}
}
}