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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.server.protocol;
import java.net.SocketAddress;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicLong;
import javax.net.ssl.SSLContext;
import org.apache.qpid.protocol.ProtocolEngineFactory;
import org.apache.qpid.protocol.ServerProtocolEngine;
import org.apache.qpid.server.logging.messages.PortMessages;
import org.apache.qpid.server.logging.subjects.PortLogSubject;
import org.apache.qpid.server.model.Broker;
import org.apache.qpid.server.model.Protocol;
import org.apache.qpid.server.model.Transport;
import org.apache.qpid.server.model.port.AmqpPort;
import org.apache.qpid.server.plugin.ProtocolEngineCreator;
import org.apache.qpid.server.plugin.ProtocolEngineCreatorComparator;
import org.apache.qpid.server.plugin.QpidServiceLoader;
public class MultiVersionProtocolEngineFactory implements ProtocolEngineFactory
{
private static final AtomicLong ID_GENERATOR = new AtomicLong(0);
private final Broker<?> _broker;
private final Set<Protocol> _supported;
private final Protocol _defaultSupportedReply;
private final SSLContext _sslContext;
private final boolean _wantClientAuth;
private final boolean _needClientAuth;
private final AmqpPort<?> _port;
private final Transport _transport;
private final ProtocolEngineCreator[] _creators;
private final ConnectionCountDecrementingTask
_connectionCountDecrementingTask = new ConnectionCountDecrementingTask();
public MultiVersionProtocolEngineFactory(Broker<?> broker,
SSLContext sslContext,
boolean wantClientAuth,
boolean needClientAuth,
final Set<Protocol> supportedVersions,
final Protocol defaultSupportedReply,
AmqpPort<?> port,
Transport transport)
{
if(defaultSupportedReply != null && !supportedVersions.contains(defaultSupportedReply))
{
throw new IllegalArgumentException("The configured default reply (" + defaultSupportedReply
+ ") to an unsupported protocol version initiation is itself not supported!");
}
_broker = broker;
_sslContext = sslContext;
_supported = supportedVersions;
_defaultSupportedReply = defaultSupportedReply;
final List<ProtocolEngineCreator> creators = new ArrayList<ProtocolEngineCreator>();
for(ProtocolEngineCreator c : new QpidServiceLoader().instancesOf(ProtocolEngineCreator.class))
{
creators.add(c);
}
Collections.sort(creators, new ProtocolEngineCreatorComparator());
_creators = creators.toArray(new ProtocolEngineCreator[creators.size()]);
_wantClientAuth = wantClientAuth;
_needClientAuth = needClientAuth;
_port = port;
_transport = transport;
}
public ServerProtocolEngine newProtocolEngine(final SocketAddress remoteSocketAddress)
{
if(_port.canAcceptNewConnection(remoteSocketAddress))
{
_port.incrementConnectionCount();
return new MultiVersionProtocolEngine(_broker, _sslContext, _wantClientAuth, _needClientAuth,
_supported, _defaultSupportedReply, _port, _transport,
ID_GENERATOR.getAndIncrement(),
_creators, _connectionCountDecrementingTask);
}
else
{
_broker.getEventLogger().message(new PortLogSubject(_port),
PortMessages.CONNECTION_REJECTED(remoteSocketAddress.toString()));
return null;
}
}
private class ConnectionCountDecrementingTask implements Runnable
{
@Override
public void run()
{
_port.decrementConnectionCount();
}
}
}
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