org.teiid.dqp.internal.process
Class DataTierTupleSource

java.lang.Object
  org.teiid.dqp.internal.process.DataTierTupleSource

All Implemented Interfaces:

TupleSource, DQPCore.CompletionListener<AtomicResultsMessage>

public class DataTierTupleSource
extends java.lang.Object
implements TupleSource, DQPCore.CompletionListener<AtomicResultsMessage>

This tuple source impl can only be used once; once it is closed, it cannot be reopened and reused. TODO: the handling of DataNotAvailable is awkward. In the multi-threaded case we'd like to not even notify the parent plan and just schedule the next poll.

Constructor Summary

DataTierTupleSource(AtomicRequestMessage aqr, RequestWorkItem workItem, ConnectorWork cwi, DataTierManagerImpl dtm, int limit)

Method Summary

void	cancelRequest()
void	closeSource() Closes the Tuple Source.
void	fullyCloseSource()
AtomicRequestMessage	getAtomicRequestMessage()
java.lang.String	getConnectorName()
boolean	isCanceled()
boolean	isDone()
boolean	isQueued()
boolean	isRunning()
boolean	isTransactional()
java.util.List<?>	nextTuple() Returns the next tuple
void	onCompletion(DQPCore.FutureWork<AtomicResultsMessage> future)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataTierTupleSource

public DataTierTupleSource(AtomicRequestMessage aqr,
                           RequestWorkItem workItem,
                           ConnectorWork cwi,
                           DataTierManagerImpl dtm,
                           int limit)

Method Detail

nextTuple

public java.util.List<?> nextTuple()
                            throws TeiidComponentException,
                                   TeiidProcessingException

Description copied from interface: TupleSource

Returns the next tuple

Specified by:

nextTuple in interface TupleSource

Returns:

the next tuple (a List object), or null if there are no more tuples.

Throws:

TeiidComponentException - indicating a non-business exception such as a communication exception, or other such nondeterministic exception

TeiidProcessingException

isQueued

public boolean isQueued()

isDone

public boolean isDone()

isRunning

public boolean isRunning()

fullyCloseSource

public void fullyCloseSource()

isCanceled

public boolean isCanceled()

cancelRequest

public void cancelRequest()

closeSource

public void closeSource()

Description copied from interface: TupleSource

Closes the Tuple Source.

Specified by:

closeSource in interface TupleSource

See Also:

TupleSource.closeSource()

getAtomicRequestMessage

public AtomicRequestMessage getAtomicRequestMessage()

getConnectorName

public java.lang.String getConnectorName()

isTransactional

public boolean isTransactional()

onCompletion

public void onCompletion(DQPCore.FutureWork<AtomicResultsMessage> future)

Specified by:

onCompletion in interface DQPCore.CompletionListener<AtomicResultsMessage>