//
// ========================================================================
// Copyright (c) 1995-2014 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 com.facebook.presto.jdbc.internal.jetty.client.http;
import java.nio.channels.AsynchronousCloseException;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import com.facebook.presto.jdbc.internal.jetty.client.HttpConnection;
import com.facebook.presto.jdbc.internal.jetty.client.HttpDestination;
import com.facebook.presto.jdbc.internal.jetty.client.HttpExchange;
import com.facebook.presto.jdbc.internal.jetty.client.api.Connection;
import com.facebook.presto.jdbc.internal.jetty.client.api.Request;
import com.facebook.presto.jdbc.internal.jetty.client.api.Response;
import com.facebook.presto.jdbc.internal.jetty.io.AbstractConnection;
import com.facebook.presto.jdbc.internal.jetty.io.EndPoint;
import com.facebook.presto.jdbc.internal.jetty.util.log.Log;
import com.facebook.presto.jdbc.internal.jetty.util.log.Logger;
public class HttpConnectionOverHTTP extends AbstractConnection implements Connection
{
private static final Logger LOG = Log.getLogger(HttpConnectionOverHTTP.class);
private final AtomicBoolean closed = new AtomicBoolean();
private final Delegate delegate;
private final HttpChannelOverHTTP channel;
private long idleTimeout;
public HttpConnectionOverHTTP(EndPoint endPoint, HttpDestination destination)
{
super(endPoint, destination.getHttpClient().getExecutor(), destination.getHttpClient().isDispatchIO());
this.delegate = new Delegate(destination);
this.channel = new HttpChannelOverHTTP(this);
}
public HttpChannelOverHTTP getHttpChannel()
{
return channel;
}
public HttpDestinationOverHTTP getHttpDestination()
{
return (HttpDestinationOverHTTP)delegate.getHttpDestination();
}
@Override
public void send(Request request, Response.CompleteListener listener)
{
delegate.send(request, listener);
}
protected void send(HttpExchange exchange)
{
delegate.send(exchange);
}
@Override
public void onOpen()
{
super.onOpen();
fillInterested();
}
public boolean isClosed()
{
return closed.get();
}
@Override
protected boolean onReadTimeout()
{
if (LOG.isDebugEnabled())
LOG.debug("{} idle timeout", this);
close(new TimeoutException());
return false;
}
@Override
public void onFillable()
{
HttpExchange exchange = channel.getHttpExchange();
if (exchange != null)
{
channel.receive();
}
else
{
// If there is no exchange, then could be either a remote close,
// or garbage bytes; in both cases we close the connection
close();
}
}
public void release()
{
// Restore idle timeout
getEndPoint().setIdleTimeout(idleTimeout);
getHttpDestination().release(this);
}
@Override
public void close()
{
close(new AsynchronousCloseException());
}
protected void close(Throwable failure)
{
if (softClose())
{
// First close then abort, to be sure that the connection cannot be reused
// from an onFailure() handler or by blocking code waiting for completion.
getHttpDestination().close(this);
getEndPoint().shutdownOutput();
if (LOG.isDebugEnabled())
LOG.debug("{} oshut", this);
getEndPoint().close();
if (LOG.isDebugEnabled())
LOG.debug("{} closed", this);
abort(failure);
}
}
public boolean softClose()
{
return closed.compareAndSet(false, true);
}
private boolean abort(Throwable failure)
{
HttpExchange exchange = channel.getHttpExchange();
return exchange != null && exchange.getRequest().abort(failure);
}
@Override
public String toString()
{
return String.format("%s@%h(l:%s <-> r:%s)",
getClass().getSimpleName(),
this,
getEndPoint().getLocalAddress(),
getEndPoint().getRemoteAddress());
}
private class Delegate extends HttpConnection
{
private Delegate(HttpDestination destination)
{
super(destination);
}
@Override
protected void send(HttpExchange exchange)
{
Request request = exchange.getRequest();
normalizeRequest(request);
// Save the old idle timeout to restore it
EndPoint endPoint = getEndPoint();
idleTimeout = endPoint.getIdleTimeout();
endPoint.setIdleTimeout(request.getIdleTimeout());
// One channel per connection, just delegate the send
channel.associate(exchange);
channel.send();
}
@Override
public void close()
{
HttpConnectionOverHTTP.this.close();
}
@Override
public String toString()
{
return HttpConnectionOverHTTP.this.toString();
}
}
}