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package org.apache.qpid.nclient.amqp;
import java.security.SecureRandom;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.qpid.framing.AMQMethodBody;
import org.apache.qpid.nclient.core.QpidConstants;
import org.apache.qpid.nclient.model.AMQPMethodEvent;
public abstract class AMQPCallBackSupport
{
private SecureRandom _localCorrelationIdGenerator = new SecureRandom();
protected ConcurrentHashMap<Long,AMQPCallBack> _cbMap = new ConcurrentHashMap<Long,AMQPCallBack>();
//the channelId assigned for this instance
protected int _channelId;
public AMQPCallBackSupport(int channelId)
{
_channelId = channelId;
}
private long getNextCorrelationId()
{
return _localCorrelationIdGenerator.nextLong();
}
// For methods that still use nowait, hopefully they will remove nowait
protected AMQPMethodEvent handleNoWait(boolean noWait,AMQMethodBody methodBody,AMQPCallBack cb)
{
if(noWait)
{
// u only need to register if u are expecting a response
long localCorrelationId = getNextCorrelationId();
AMQPMethodEvent msg = new AMQPMethodEvent(_channelId,methodBody,QpidConstants.EMPTY_CORRELATION_ID,localCorrelationId);
_cbMap.put(localCorrelationId, cb);
return msg;
}
else
{
AMQPMethodEvent msg = new AMQPMethodEvent(_channelId,methodBody,QpidConstants.EMPTY_CORRELATION_ID);
return msg;
}
}
protected AMQPMethodEvent handleAsynchronousCall(AMQMethodBody methodBody,AMQPCallBack cb)
{
long localCorrelationId = getNextCorrelationId();
AMQPMethodEvent msg = new AMQPMethodEvent(_channelId,methodBody,QpidConstants.EMPTY_CORRELATION_ID,localCorrelationId);
_cbMap.put(localCorrelationId, cb);
return msg;
}
protected void invokeCallBack(long localCorrelationId, AMQMethodBody methodBody)
{
if(_cbMap.contains(localCorrelationId))
{
AMQPCallBack cb = (AMQPCallBack)_cbMap.get(localCorrelationId);
cb.brokerResponded(methodBody);
}
}
}
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