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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.handler;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.UUID;
import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.ChannelOpenBody;
import org.apache.qpid.framing.ChannelOpenOkBody;
import org.apache.qpid.framing.MethodRegistry;
import org.apache.qpid.framing.ProtocolVersion;
import org.apache.qpid.framing.amqp_0_9.MethodRegistry_0_9;
import org.apache.qpid.framing.amqp_0_91.MethodRegistry_0_91;
import org.apache.qpid.framing.amqp_8_0.MethodRegistry_8_0;
import org.apache.qpid.protocol.AMQConstant;
import org.apache.qpid.server.AMQChannel;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.state.StateAwareMethodListener;
import org.apache.qpid.server.virtualhost.VirtualHost;
public class ChannelOpenHandler implements StateAwareMethodListener<ChannelOpenBody>
{
private static final Logger _logger = Logger.getLogger(ChannelOpenHandler.class);
private static ChannelOpenHandler _instance = new ChannelOpenHandler();
public static ChannelOpenHandler getInstance()
{
return _instance;
}
private ChannelOpenHandler()
{
}
public void methodReceived(AMQStateManager stateManager, ChannelOpenBody body, int channelId) throws AMQException
{
AMQProtocolSession session = stateManager.getProtocolSession();
VirtualHost virtualHost = session.getVirtualHost();
// Protect the broker against out of order frame request.
if (virtualHost == null)
{
throw new AMQException(AMQConstant.COMMAND_INVALID, "Virtualhost has not yet been set. ConnectionOpen has not been called.", null);
}
_logger.info("Connecting to: " + virtualHost.getName());
final AMQChannel channel = new AMQChannel(session,channelId, virtualHost.getMessageStore());
session.addChannel(channel);
ChannelOpenOkBody response;
ProtocolVersion pv = session.getProtocolVersion();
if(pv.equals(ProtocolVersion.v8_0))
{
MethodRegistry_8_0 methodRegistry = (MethodRegistry_8_0) MethodRegistry.getMethodRegistry(ProtocolVersion.v8_0);
response = methodRegistry.createChannelOpenOkBody();
}
else if(pv.equals(ProtocolVersion.v0_9))
{
MethodRegistry_0_9 methodRegistry = (MethodRegistry_0_9) MethodRegistry.getMethodRegistry(ProtocolVersion.v0_9);
UUID uuid = UUID.randomUUID();
ByteArrayOutputStream output = new ByteArrayOutputStream();
DataOutputStream dataOut = new DataOutputStream(output);
try
{
dataOut.writeLong(uuid.getMostSignificantBits());
dataOut.writeLong(uuid.getLeastSignificantBits());
dataOut.flush();
dataOut.close();
}
catch (IOException e)
{
// This *really* shouldn't happen as we're not doing any I/O
throw new RuntimeException("I/O exception when writing to byte array", e);
}
// should really associate this channelId to the session
byte[] channelName = output.toByteArray();
response = methodRegistry.createChannelOpenOkBody(channelName);
}
else if(pv.equals(ProtocolVersion.v0_91))
{
MethodRegistry_0_91 methodRegistry = (MethodRegistry_0_91) MethodRegistry.getMethodRegistry(ProtocolVersion.v0_91);
UUID uuid = UUID.randomUUID();
ByteArrayOutputStream output = new ByteArrayOutputStream();
DataOutputStream dataOut = new DataOutputStream(output);
try
{
dataOut.writeLong(uuid.getMostSignificantBits());
dataOut.writeLong(uuid.getLeastSignificantBits());
dataOut.flush();
dataOut.close();
}
catch (IOException e)
{
// This *really* shouldn't happen as we're not doing any I/O
throw new RuntimeException("I/O exception when writing to byte array", e);
}
// should really associate this channelId to the session
byte[] channelName = output.toByteArray();
response = methodRegistry.createChannelOpenOkBody(channelName);
}
else
{
throw new AMQException(AMQConstant.INTERNAL_ERROR, "Got channel open for protocol version not catered for: " + pv, null);
}
session.writeFrame(response.generateFrame(channelId));
}
}
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