/**
* This method only flushes one single stream element from the provided data enumerator. Returns
* false if the flushing the stream element fails. This method also cleans the prepared statements
* by removing the listener completely.
*
* @param dataEnum
* @param listener
* @return
*/
private boolean flushStreamElement(DataEnumerator dataEnum, DistributionRequest listener) {
if (listener.isClosed()) {
logger.debug(
"Flushing an stream element failed, isClosed=true [Listener: "
+ listener.toString()
+ "]");
return false;
}
if (!dataEnum.hasMoreElements()) {
logger.debug("Nothing to flush to [Listener: " + listener.toString() + "]");
return true;
}
StreamElement se = dataEnum.nextElement();
// boolean success = true;
boolean success = listener.deliverStreamElement(se);
if (!success) {
logger.debug(
"FLushing an stream element failed, delivery failure [Listener: "
+ listener.toString()
+ "]");
return false;
}
logger.debug("Flushing an stream element succeed [Listener: " + listener.toString() + "]");
return true;
}
private void addListenerToCandidates(DistributionRequest listener) {
/** Locker variable should be modified EXACTLY like candidateListeners variable. */
logger.debug("Adding the listener: " + listener.toString() + " to the candidates.");
DataEnumerator dataEnum = makeDataEnum(listener);
if (dataEnum.hasMoreElements()) {
candidateListeners.put(listener, dataEnum);
locker.add(listener);
}
}