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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.spdy.server;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicBoolean;
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.spdy.CompressionFactory;
import org.eclipse.jetty.spdy.FlowControlStrategy;
import org.eclipse.jetty.spdy.StandardCompressionFactory;
import org.eclipse.jetty.spdy.StandardSession;
import org.eclipse.jetty.spdy.api.GoAwayInfo;
import org.eclipse.jetty.spdy.api.Session;
import org.eclipse.jetty.spdy.api.server.ServerSessionFrameListener;
import org.eclipse.jetty.spdy.client.FlowControlStrategyFactory;
import org.eclipse.jetty.spdy.client.SPDYConnection;
import org.eclipse.jetty.spdy.generator.Generator;
import org.eclipse.jetty.spdy.parser.Parser;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
@ManagedObject("SPDY Server Connection Factory")
public class SPDYServerConnectionFactory extends AbstractConnectionFactory
{
/**
* @deprecated use {@link #checkProtocolNegotiationAvailable()} instead.
*/
@Deprecated
public static void checkNPNAvailable()
{
checkProtocolNegotiationAvailable();
}
public static void checkProtocolNegotiationAvailable()
{
if (!isAvailableInBootClassPath("org.eclipse.jetty.alpn.ALPN") &&
!isAvailableInBootClassPath("org.eclipse.jetty.npn.NextProtoNego"))
throw new IllegalStateException("No ALPN nor NPN classes available");
}
private static boolean isAvailableInBootClassPath(String className)
{
try
{
Class<?> klass = ClassLoader.getSystemClassLoader().loadClass(className);
if (klass.getClassLoader() != null)
throw new IllegalStateException(className + " must be on JVM boot classpath");
return true;
}
catch (ClassNotFoundException x)
{
return false;
}
}
private final Queue<Session> sessions = new ConcurrentLinkedQueue<>();
private final short version;
private final ServerSessionFrameListener listener;
private int initialWindowSize;
private boolean dispatchIO;
public SPDYServerConnectionFactory(int version)
{
this(version, null);
}
public SPDYServerConnectionFactory(int version, ServerSessionFrameListener listener)
{
super("spdy/" + version);
this.version = (short)version;
this.listener = listener;
setInitialWindowSize(65536);
setDispatchIO(true);
}
@ManagedAttribute("SPDY version")
public short getVersion()
{
return version;
}
public ServerSessionFrameListener getServerSessionFrameListener()
{
return listener;
}
@Override
public Connection newConnection(Connector connector, EndPoint endPoint)
{
CompressionFactory compressionFactory = new StandardCompressionFactory();
Parser parser = new Parser(compressionFactory.newDecompressor());
Generator generator = new Generator(connector.getByteBufferPool(), compressionFactory.newCompressor());
ServerSessionFrameListener listener = provideServerSessionFrameListener(connector, endPoint);
SPDYConnection connection = new ServerSPDYConnection(connector, endPoint, parser, listener,
isDispatchIO(), getInputBufferSize());
FlowControlStrategy flowControlStrategy = newFlowControlStrategy(version);
StandardSession session = new StandardSession(getVersion(), connector.getByteBufferPool(),
connector.getScheduler(), connection, endPoint, connection, 2, listener,
generator, flowControlStrategy);
session.setWindowSize(getInitialWindowSize());
parser.addListener(session);
connection.setSession(session);
sessionOpened(session);
return configure(connection, connector, endPoint);
}
protected FlowControlStrategy newFlowControlStrategy(short version)
{
return FlowControlStrategyFactory.newFlowControlStrategy(version);
}
protected ServerSessionFrameListener provideServerSessionFrameListener(Connector connector, EndPoint endPoint)
{
return listener;
}
@ManagedAttribute("Initial Window Size")
public int getInitialWindowSize()
{
return initialWindowSize;
}
public void setInitialWindowSize(int initialWindowSize)
{
this.initialWindowSize = initialWindowSize;
}
@ManagedAttribute("Dispatch I/O to a pooled thread")
public boolean isDispatchIO()
{
return dispatchIO;
}
public void setDispatchIO(boolean dispatchIO)
{
this.dispatchIO = dispatchIO;
}
protected boolean sessionOpened(Session session)
{
// Add sessions only if the connector is not stopping
return sessions.offer(session);
}
protected boolean sessionClosed(Session session)
{
// Remove sessions only if the connector is not stopping
// to avoid concurrent removes during iterations
return sessions.remove(session);
}
void closeSessions()
{
for (Session session : sessions)
session.goAway(new GoAwayInfo(), Callback.Adapter.INSTANCE);
sessions.clear();
}
@Override
protected void doStop() throws Exception
{
closeSessions();
super.doStop();
}
public Collection<Session> getSessions()
{
return Collections.unmodifiableCollection(sessions);
}
@Override
protected void dumpThis(Appendable out) throws IOException
{
super.dumpThis(out);
dump(out, "", sessions);
}
private class ServerSPDYConnection extends SPDYConnection implements Runnable
{
private final ServerSessionFrameListener listener;
private final AtomicBoolean connected = new AtomicBoolean();
private ServerSPDYConnection(Connector connector, EndPoint endPoint, Parser parser,
ServerSessionFrameListener listener, boolean dispatchIO, int bufferSize)
{
super(endPoint, connector.getByteBufferPool(), parser, connector.getExecutor(),
dispatchIO, bufferSize);
this.listener = listener;
}
@Override
public void onOpen()
{
super.onOpen();
if (connected.compareAndSet(false, true))
getExecutor().execute(this);
}
@Override
public void onClose()
{
super.onClose();
sessionClosed(getSession());
}
@Override
public void run()
{
// NPE guard to support tests
if (listener != null)
listener.onConnect(getSession());
}
}
}
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