/
HttpConnectionOverHTTP2.java
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/
HttpConnectionOverHTTP2.java
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//
// ========================================================================
// Copyright (c) 1995-2021 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.http2.client.http;
import java.nio.channels.AsynchronousCloseException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import org.eclipse.jetty.client.ConnectionPool;
import org.eclipse.jetty.client.HttpChannel;
import org.eclipse.jetty.client.HttpConnection;
import org.eclipse.jetty.client.HttpDestination;
import org.eclipse.jetty.client.HttpExchange;
import org.eclipse.jetty.client.HttpRequest;
import org.eclipse.jetty.client.HttpResponse;
import org.eclipse.jetty.client.HttpUpgrader;
import org.eclipse.jetty.client.SendFailure;
import org.eclipse.jetty.http.HttpURI;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.http.MetaData;
import org.eclipse.jetty.http2.ErrorCode;
import org.eclipse.jetty.http2.HTTP2Session;
import org.eclipse.jetty.http2.api.Session;
import org.eclipse.jetty.http2.api.Stream;
import org.eclipse.jetty.http2.frames.HeadersFrame;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.thread.Sweeper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class HttpConnectionOverHTTP2 extends HttpConnection implements Sweeper.Sweepable, ConnectionPool.Multiplexable
{
private static final Logger LOG = LoggerFactory.getLogger(HttpConnection.class);
private final Set<HttpChannel> activeChannels = ConcurrentHashMap.newKeySet();
private final Queue<HttpChannelOverHTTP2> idleChannels = new ConcurrentLinkedQueue<>();
private final AtomicBoolean closed = new AtomicBoolean();
private final AtomicInteger sweeps = new AtomicInteger();
private final Session session;
private boolean recycleHttpChannels = true;
public HttpConnectionOverHTTP2(HttpDestination destination, Session session)
{
super(destination);
this.session = session;
}
public Session getSession()
{
return session;
}
public boolean isRecycleHttpChannels()
{
return recycleHttpChannels;
}
public void setRecycleHttpChannels(boolean recycleHttpChannels)
{
this.recycleHttpChannels = recycleHttpChannels;
}
@Override
public int getMaxMultiplex()
{
return ((HTTP2Session)session).getMaxLocalStreams();
}
@Override
protected Iterator<HttpChannel> getHttpChannels()
{
return activeChannels.iterator();
}
@Override
public SendFailure send(HttpExchange exchange)
{
HttpRequest request = exchange.getRequest();
request.version(HttpVersion.HTTP_2);
normalizeRequest(request);
// One connection maps to N channels, so one channel for each exchange.
HttpChannelOverHTTP2 channel = acquireHttpChannel();
activeChannels.add(channel);
return send(channel, exchange);
}
public void upgrade(Map<String, Object> context)
{
// In case of HTTP/1.1 upgrade to HTTP/2, the request is HTTP/1.1
// (with upgrade) for a resource, and the response is HTTP/2.
HttpResponse response = (HttpResponse)context.get(HttpResponse.class.getName());
HttpRequest request = (HttpRequest)response.getRequest();
HttpExchange exchange = request.getConversation().getExchanges().peekLast();
HttpChannelOverHTTP2 http2Channel = acquireHttpChannel();
activeChannels.add(http2Channel);
HttpExchange newExchange = new HttpExchange(exchange.getHttpDestination(), exchange.getRequest(), List.of());
http2Channel.associate(newExchange);
// Create the implicit stream#1 so that it can receive the HTTP/2 response.
MetaData.Request metaData = new MetaData.Request(request.getMethod(), HttpURI.from(request.getURI()), HttpVersion.HTTP_2, request.getHeaders());
// We do not support upgrade requests with content, so endStream=true.
HeadersFrame frame = new HeadersFrame(metaData, null, true);
Stream stream = ((HTTP2Session)session).newUpgradeStream(frame, http2Channel.getStreamListener(), failure ->
{
newExchange.requestComplete(failure);
newExchange.terminateRequest();
if (LOG.isDebugEnabled())
LOG.debug("Upgrade failed for {}", HttpConnectionOverHTTP2.this);
});
if (stream != null)
{
http2Channel.setStream(stream);
newExchange.requestComplete(null);
newExchange.terminateRequest();
if (LOG.isDebugEnabled())
LOG.debug("Upgrade succeeded for {}", HttpConnectionOverHTTP2.this);
}
}
@Override
protected void normalizeRequest(HttpRequest request)
{
super.normalizeRequest(request);
if (request instanceof HttpUpgrader.Factory)
{
HttpUpgrader upgrader = ((HttpUpgrader.Factory)request).newHttpUpgrader(HttpVersion.HTTP_2);
request.getConversation().setAttribute(HttpUpgrader.class.getName(), upgrader);
upgrader.prepare(request);
}
}
protected HttpChannelOverHTTP2 acquireHttpChannel()
{
HttpChannelOverHTTP2 channel = idleChannels.poll();
if (channel == null)
channel = newHttpChannel();
return channel;
}
protected HttpChannelOverHTTP2 newHttpChannel()
{
return new HttpChannelOverHTTP2(getHttpDestination(), this, getSession());
}
protected boolean release(HttpChannelOverHTTP2 channel)
{
if (LOG.isDebugEnabled())
LOG.debug("Released {}", channel);
if (activeChannels.remove(channel))
{
// Recycle only non-failed channels.
if (channel.isFailed())
channel.destroy();
else if (isRecycleHttpChannels())
idleChannels.offer(channel);
return true;
}
else
{
channel.destroy();
return false;
}
}
@Override
public boolean onIdleTimeout(long idleTimeout)
{
boolean close = super.onIdleTimeout(idleTimeout);
if (close)
close(new TimeoutException("idle_timeout"));
return false;
}
@Override
public void close()
{
close(new AsynchronousCloseException());
destroy();
}
protected void close(Throwable failure)
{
if (closed.compareAndSet(false, true))
{
getHttpDestination().remove(this);
abort(failure);
session.close(ErrorCode.NO_ERROR.code, failure.getMessage(), Callback.NOOP);
HttpChannel channel = idleChannels.poll();
while (channel != null)
{
channel.destroy();
channel = idleChannels.poll();
}
}
}
@Override
public boolean isClosed()
{
return closed.get();
}
private void abort(Throwable failure)
{
for (HttpChannel channel : activeChannels)
{
HttpExchange exchange = channel.getHttpExchange();
if (exchange != null)
exchange.getRequest().abort(failure);
}
activeChannels.clear();
HttpChannel channel = idleChannels.poll();
while (channel != null)
{
channel.destroy();
channel = idleChannels.poll();
}
}
@Override
public boolean sweep()
{
if (!isClosed())
return false;
return sweeps.incrementAndGet() >= 4;
}
@Override
public String toString()
{
return String.format("%s@%x(closed=%b)[%s]",
getClass().getSimpleName(),
hashCode(),
isClosed(),
session);
}
}