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package org.apache.qpid.nclient.amqp.qpid;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import org.apache.log4j.Logger;
import org.apache.qpid.framing.AMQMethodBody;
import org.apache.qpid.framing.DtxDemarcationEndBody;
import org.apache.qpid.framing.DtxDemarcationEndOkBody;
import org.apache.qpid.framing.DtxDemarcationSelectBody;
import org.apache.qpid.framing.DtxDemarcationSelectOkBody;
import org.apache.qpid.framing.DtxDemarcationStartBody;
import org.apache.qpid.framing.DtxDemarcationStartOkBody;
import org.apache.qpid.nclient.amqp.AMQPDtxDemarcation;
import org.apache.qpid.nclient.amqp.event.AMQPMethodEvent;
import org.apache.qpid.nclient.amqp.event.AMQPMethodListener;
import org.apache.qpid.nclient.amqp.state.AMQPState;
import org.apache.qpid.nclient.amqp.state.AMQPStateChangedEvent;
import org.apache.qpid.nclient.amqp.state.AMQPStateMachine;
import org.apache.qpid.nclient.amqp.state.AMQPStateManager;
import org.apache.qpid.nclient.amqp.state.AMQPStateType;
import org.apache.qpid.nclient.config.ClientConfiguration;
import org.apache.qpid.nclient.core.AMQPException;
import org.apache.qpid.nclient.core.Phase;
import org.apache.qpid.nclient.core.QpidConstants;
import org.apache.qpid.nclient.util.AMQPValidator;
public class QpidAMQPDtxDemarcation extends AMQPStateMachine implements AMQPMethodListener, AMQPDtxDemarcation
{
private static final Logger _logger = Logger.getLogger(QpidAMQPDtxDemarcation.class);
// the channelId that will be used for transactions
private int _channelId;
private Phase _phase;
private AMQPState _currentState;
private AMQPStateManager _stateManager;
private final AMQPState[] _validEndStates = new AMQPState[]
{ AMQPState.DTX_STARTED };
private final AMQPState[] _validStartStates = new AMQPState[]
{ AMQPState.DTX_NOT_STARTED, AMQPState.DTX_END };
// The wait period until a server sends a respond
private long _serverTimeOut = 1000;
private final Lock _lock = new ReentrantLock();
private final Condition _dtxNotSelected = _lock.newCondition();
private final Condition _channelNotClosed = _lock.newCondition();
private DtxDemarcationSelectOkBody _dtxDemarcationSelectOkBody;
protected QpidAMQPDtxDemarcation(int channelId, Phase phase, AMQPStateManager stateManager)
{
_channelId = channelId;
_phase = phase;
_stateManager = stateManager;
_currentState = AMQPState.DTX_CHANNEL_NOT_SELECTED;
_serverTimeOut = ClientConfiguration.get().getLong(QpidConstants.SERVER_TIMEOUT_IN_MILLISECONDS);
}
/**
* -------------------------------------------
* API Methods
* --------------------------------------------
*/
public DtxDemarcationSelectOkBody select(DtxDemarcationSelectBody dtxDemarcationSelectBody) throws AMQPException
{
_lock.lock();
try
{
_dtxDemarcationSelectOkBody = null;
checkIfValidStateTransition(AMQPState.DTX_CHANNEL_NOT_SELECTED, _currentState, AMQPState.DTX_NOT_STARTED);
AMQPMethodEvent msg = new AMQPMethodEvent(_channelId, _dtxDemarcationSelectOkBody, QpidConstants.EMPTY_CORRELATION_ID);
_phase.messageSent(msg);
//_channelNotOpend.await(_serverTimeOut, TimeUnit.MILLISECONDS);
_dtxNotSelected.await();
AMQPValidator.throwExceptionOnNull(_dtxDemarcationSelectOkBody, "The broker didn't send the DtxDemarcationSelectOkBody in time");
notifyState(AMQPState.CHANNEL_OPENED);
_currentState = AMQPState.CHANNEL_OPENED;
return _dtxDemarcationSelectOkBody;
}
catch (Exception e)
{
throw new AMQPException("Error in dtx.select", e);
}
finally
{
_lock.unlock();
}
}
public DtxDemarcationStartOkBody start(DtxDemarcationStartBody dtxDemarcationStartBody) throws AMQPException
{
// TODO Auto-generated method stub
return null;
}
public DtxDemarcationEndOkBody end(DtxDemarcationEndBody dtxDemarcationEndBody) throws AMQPException
{
// TODO Auto-generated method stub
return null;
}
/**
* -------------------------------------------
* AMQPMethodListener methods
* --------------------------------------------
*/
public <B extends AMQMethodBody> boolean methodReceived(AMQPMethodEvent<B> evt) throws AMQPException
{
return true;
}
private void notifyState(AMQPState newState) throws AMQPException
{
_stateManager.notifyStateChanged(new AMQPStateChangedEvent(_currentState, newState,AMQPStateType.CHANNEL_STATE));
}
}
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