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//
// ========================================================================
// Copyright (c) 1995-2016 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.http2.server;
import java.util.Objects;
import org.eclipse.jetty.http2.BufferingFlowControlStrategy;
import org.eclipse.jetty.http2.FlowControlStrategy;
import org.eclipse.jetty.http2.HTTP2Connection;
import org.eclipse.jetty.http2.api.server.ServerSessionListener;
import org.eclipse.jetty.http2.generator.Generator;
import org.eclipse.jetty.http2.parser.ServerParser;
import org.eclipse.jetty.io.Connection;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.server.AbstractConnectionFactory;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.HttpConfiguration;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
import org.eclipse.jetty.util.annotation.Name;
import org.eclipse.jetty.util.component.LifeCycle;
@ManagedObject
public abstract class AbstractHTTP2ServerConnectionFactory extends AbstractConnectionFactory
{
private final Connection.Listener connectionListener = new ConnectionListener();
private final HttpConfiguration httpConfiguration;
private int maxDynamicTableSize = 4096;
private int initialStreamSendWindow = FlowControlStrategy.DEFAULT_WINDOW_SIZE;
private int maxConcurrentStreams = -1;
private int maxHeaderBlockFragment = 0;
private FlowControlStrategy.Factory flowControlStrategyFactory = () -> new BufferingFlowControlStrategy(0.5F);
public AbstractHTTP2ServerConnectionFactory(@Name("config") HttpConfiguration httpConfiguration)
{
this(httpConfiguration,"h2","h2-17","h2-16","h2-15","h2-14");
}
protected AbstractHTTP2ServerConnectionFactory(@Name("config") HttpConfiguration httpConfiguration, String... protocols)
{
super(protocols);
this.httpConfiguration = Objects.requireNonNull(httpConfiguration);
addBean(httpConfiguration);
}
@ManagedAttribute("The HPACK dynamic table maximum size")
public int getMaxDynamicTableSize()
{
return maxDynamicTableSize;
}
public void setMaxDynamicTableSize(int maxDynamicTableSize)
{
this.maxDynamicTableSize = maxDynamicTableSize;
}
@ManagedAttribute("The initial size of stream's flow control send window")
public int getInitialStreamSendWindow()
{
return initialStreamSendWindow;
}
public void setInitialStreamSendWindow(int initialStreamSendWindow)
{
this.initialStreamSendWindow = initialStreamSendWindow;
}
@ManagedAttribute("The max number of concurrent streams per session")
public int getMaxConcurrentStreams()
{
return maxConcurrentStreams;
}
public void setMaxConcurrentStreams(int maxConcurrentStreams)
{
this.maxConcurrentStreams = maxConcurrentStreams;
}
public int getMaxHeaderBlockFragment()
{
return maxHeaderBlockFragment;
}
public void setMaxHeaderBlockFragment(int maxHeaderBlockFragment)
{
this.maxHeaderBlockFragment = maxHeaderBlockFragment;
}
public FlowControlStrategy.Factory getFlowControlStrategyFactory()
{
return flowControlStrategyFactory;
}
public void setFlowControlStrategyFactory(FlowControlStrategy.Factory flowControlStrategyFactory)
{
this.flowControlStrategyFactory = flowControlStrategyFactory;
}
public HttpConfiguration getHttpConfiguration()
{
return httpConfiguration;
}
@Override
public Connection newConnection(Connector connector, EndPoint endPoint)
{
ServerSessionListener listener = newSessionListener(connector, endPoint);
Generator generator = new Generator(connector.getByteBufferPool(), getMaxDynamicTableSize(), getMaxHeaderBlockFragment());
FlowControlStrategy flowControl = getFlowControlStrategyFactory().newFlowControlStrategy();
HTTP2ServerSession session = new HTTP2ServerSession(connector.getScheduler(), endPoint, generator, listener, flowControl);
session.setMaxLocalStreams(getMaxConcurrentStreams());
session.setMaxRemoteStreams(getMaxConcurrentStreams());
// For a single stream in a connection, there will be a race between
// the stream idle timeout and the connection idle timeout. However,
// the typical case is that the connection will be busier and the
// stream idle timeout will expire earlier that the connection's.
session.setStreamIdleTimeout(endPoint.getIdleTimeout());
ServerParser parser = newServerParser(connector, session);
HTTP2Connection connection = new HTTP2ServerConnection(connector.getByteBufferPool(), connector.getExecutor(),
endPoint, httpConfiguration, parser, session, getInputBufferSize(), listener);
connection.addListener(connectionListener);
return configure(connection, connector, endPoint);
}
protected abstract ServerSessionListener newSessionListener(Connector connector, EndPoint endPoint);
protected ServerParser newServerParser(Connector connector, ServerParser.Listener listener)
{
return new ServerParser(connector.getByteBufferPool(), listener, getMaxDynamicTableSize(), getHttpConfiguration().getRequestHeaderSize());
}
private class ConnectionListener implements Connection.Listener
{
@Override
public void onOpened(Connection connection)
{
addManaged((LifeCycle)((HTTP2Connection)connection).getSession());
}
@Override
public void onClosed(Connection connection)
{
removeBean(((HTTP2Connection)connection).getSession());
}
}
}
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