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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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.log4j.Logger;
import org.apache.qpid.framing.AMQMethodBody;
import org.apache.qpid.server.state.AMQState;
import org.apache.qpid.server.state.AMQStateManager;
import org.apache.qpid.server.state.IllegalStateTransitionException;
import org.apache.qpid.server.state.StateAwareMethodListener;
import org.apache.qpid.server.cluster.util.LogMessage;
import java.util.HashMap;
import java.util.Map;
/**
* An extension of server.AMQStateManager that allows different handlers to be registered.
*
*/
class ServerHandlerRegistry extends AMQStateManager
{
private final Logger _logger = Logger.getLogger(ServerHandlerRegistry.class);
private final Map<AMQState, MethodHandlerRegistry> _handlers = new HashMap<AMQState, MethodHandlerRegistry>();
ServerHandlerRegistry()
{
super(AMQState.CONNECTION_NOT_STARTED, false);
}
ServerHandlerRegistry(ServerHandlerRegistry s)
{
this();
_handlers.putAll(s._handlers);
}
ServerHandlerRegistry(MethodHandlerFactory factory)
{
this();
init(factory);
}
void setHandlers(AMQState state, MethodHandlerRegistry handlers)
{
_handlers.put(state, handlers);
}
void init(MethodHandlerFactory factory)
{
for (AMQState s : AMQState.values())
{
setHandlers(s, factory.register(s, new MethodHandlerRegistry()));
}
}
protected <B extends AMQMethodBody> StateAwareMethodListener<B> findStateTransitionHandler(AMQState state, B frame) throws IllegalStateTransitionException
{
MethodHandlerRegistry registry = _handlers.get(state);
StateAwareMethodListener<B> handler = (registry == null) ? null : registry.getHandler(frame);
if (handler == null)
{
_logger.warn(new LogMessage("No handler for {0}, {1}", state, frame));
}
return handler;
}
<A extends AMQMethodBody, B extends Class<A>> void addHandler(AMQState state, B type, StateAwareMethodListener<A> handler)
{
MethodHandlerRegistry registry = _handlers.get(state);
if (registry == null)
{
registry = new MethodHandlerRegistry();
_handlers.put(state, registry);
}
registry.addHandler(type, handler);
}
}
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