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package org.apache.qpid.nclient.model;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.log4j.Logger;
import org.apache.qpid.nclient.amqp.state.AMQPStateManager;
import org.apache.qpid.nclient.config.ClientConfiguration;
import org.apache.qpid.nclient.core.AMQPException;
import org.apache.qpid.nclient.core.AbstractPhase;
import org.apache.qpid.nclient.core.Phase;
import org.apache.qpid.nclient.core.PhaseContext;
import org.apache.qpid.nclient.core.QpidConstants;
/**
* This Phase handles Layer 3 functionality of the AMQP spec.
* This class acts as the interface between the API and the pipeline
*/
public class ModelPhase extends AbstractPhase {
private static final Logger _logger = Logger.getLogger(ModelPhase.class);
private Map <Class,List> _methodListners = new HashMap<Class,List>();
/**
* ------------------------------------------------
* Phase - methods introduced by Phase
* ------------------------------------------------
*/
public void init(PhaseContext ctx, Phase nextInFlowPhase, Phase nextOutFlowPhase)
{
super.init(ctx, nextInFlowPhase, nextOutFlowPhase);
try
{
loadMethodListeners();
}
catch(Exception e)
{
_logger.fatal("Error loading method listeners", e);
}
}
public void messageReceived(Object msg) throws AMQPException
{
notifyMethodListerners((AMQPMethodEvent)msg);
// not doing super.methodReceived here, as this is the end of
// the pipeline
//super.messageReceived(msg);
}
/**
* This method should only except and pass messages
* of Type @see AMQPMethodEvent
*/
public void messageSent(Object msg) throws AMQPException
{
super.messageSent(msg);
}
/**
* ------------------------------------------------
* Event Handling
* ------------------------------------------------
*/
public void notifyMethodListerners(AMQPMethodEvent event) throws AMQPException
{
if (_methodListners.containsKey(event.getMethod().getClass()))
{
List<AMQPMethodListener> listeners = _methodListners.get(event.getMethod().getClass());
if(listeners.size()>0)
{
throw new AMQPException("There are no registered listeners for this method");
}
for(AMQPMethodListener l : listeners)
{
try
{
l.methodReceived(event);
}
catch (Exception e)
{
_logger.error("Error handling method event " + event, e);
}
}
}
}
/**
* ------------------------------------------------
* Configuration
* ------------------------------------------------
*/
/**
* This method loads method listeners from the client.xml file
* For each method class there is a list of listeners
*/
private void loadMethodListeners() throws Exception
{
int count = ClientConfiguration.get().getMaxIndex(QpidConstants.METHOD_LISTENERS + "." + QpidConstants.METHOD_LISTENER);
System.out.println(count);
for(int i=0 ;i<count;i++)
{
String methodListener = QpidConstants.METHOD_LISTENERS + "." + QpidConstants.METHOD_LISTENER + "(" + i + ")";
String className = ClientConfiguration.get().getString(methodListener + "." + QpidConstants.CLASS);
Class listenerClass = Class.forName(className);
List<String> list = ClientConfiguration.get().getList(methodListener + "." + QpidConstants.METHOD_CLASS);
for(String s:list)
{
List listeners;
Class methodClass = Class.forName(s);
if (_methodListners.containsKey(methodClass))
{
listeners = _methodListners.get(methodClass);
}
else
{
listeners = new ArrayList();
_methodListners.put(methodClass,listeners);
}
listeners.add(listenerClass);
}
}
}
}
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