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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.cluster;
import org.apache.mina.common.IoSession;
import java.util.LinkedList;
import java.util.Queue;
/**
* Buffers any received messages until join completes.
*
*/
class InductionBuffer
{
private final Queue<Message> _buffer = new LinkedList<Message>();
private final MessageHandler _handler;
private boolean _buffering = true;
InductionBuffer(MessageHandler handler)
{
_handler = handler;
}
private void process() throws Exception
{
for (Message o = _buffer.poll(); o != null; o = _buffer.poll())
{
o.deliver(_handler);
}
_buffering = false;
}
synchronized void deliver() throws Exception
{
process();
}
synchronized void receive(IoSession session, Object msg) throws Exception
{
if (_buffering)
{
_buffer.offer(new Message(session, msg));
}
else
{
_handler.deliver(session, msg);
}
}
private static class Message
{
private final IoSession _session;
private final Object _msg;
Message(IoSession session, Object msg)
{
_session = session;
_msg = msg;
}
void deliver(MessageHandler handler) throws Exception
{
handler.deliver(_session, _msg);
}
}
static interface MessageHandler
{
public void deliver(IoSession session, Object msg) throws Exception;
}
}
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