qpid/java/broker/src/main/java/org/apache/qpid/server/handler/BasicRecoverSyncMethodHandler.java

package org.apache.qpid.server.handler;
/*
 * 
 * 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.
 * 
 */


import org.apache.log4j.Logger;

import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQMethodBody;
import org.apache.qpid.framing.BasicRecoverSyncBody;
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.server.AMQChannel;
import org.apache.qpid.server.protocol.AMQProtocolSession;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.state.StateAwareMethodListener;

public class BasicRecoverSyncMethodHandler implements StateAwareMethodListener<BasicRecoverSyncBody>
{
    private static final Logger _logger = Logger.getLogger(BasicRecoverSyncMethodHandler.class);

    private static final BasicRecoverSyncMethodHandler _instance = new BasicRecoverSyncMethodHandler();

    public static BasicRecoverSyncMethodHandler getInstance()
    {
        return _instance;
    }

    public void methodReceived(AMQStateManager stateManager, BasicRecoverSyncBody body, int channelId) throws AMQException
    {
        AMQProtocolSession session = stateManager.getProtocolSession();

        _logger.debug("Recover received on protocol session " + session + " and channel " + channelId);
        AMQChannel channel = session.getChannel(channelId);


        if (channel == null)
        {
            throw body.getChannelNotFoundException(channelId);
        }
        channel.sync();
        channel.resend(body.getRequeue());

        // Qpid 0-8 hacks a synchronous -ok onto recover.
        // In Qpid 0-9 we create a separate sync-recover, sync-recover-ok pair to be "more" compliant
        if(session.getProtocolVersion().equals(ProtocolVersion.v0_9))
        {
            MethodRegistry_0_9 methodRegistry = (MethodRegistry_0_9) session.getMethodRegistry();
            AMQMethodBody recoverOk = methodRegistry.createBasicRecoverSyncOkBody();
            session.writeFrame(recoverOk.generateFrame(channelId));

        }
        else if(session.getProtocolVersion().equals(ProtocolVersion.v0_91))
        {
            MethodRegistry_0_91 methodRegistry = (MethodRegistry_0_91) session.getMethodRegistry();
            AMQMethodBody recoverOk = methodRegistry.createBasicRecoverSyncOkBody();
            session.writeFrame(recoverOk.generateFrame(channelId));

        }

    }
}