super(POLLING_MANAGER_WAIT_TIME);
}
protected boolean internalRun() {
if(log.isDebugEnabled()) log.debug("Enter: PollingManager::internalRun");
Transaction t = null;
try {
// If we have request scheduled, handle them first, and then pick
// pick a sequence using a round-robin approach. Scheduled polls
// bypass the normal polling checks, to make sure that they happen
boolean forcePoll = false;
SequenceEntry entry = null;
synchronized (this) {
if(!scheduledPollingRequests.isEmpty()) {
entry = (SequenceEntry) scheduledPollingRequests.removeFirst();
forcePoll = true;
}
}
if(entry == null) {
ArrayList allSequencesList = getSequences();
int size = allSequencesList.size();
if(log.isDebugEnabled()) log.debug("Choosing one from " + size + " sequences");
if(nextIndex >= size) {
nextIndex = 0;
// We just looped over the set of sequences, so sleep before we try
// polling them again.
if (log.isDebugEnabled()) log.debug("Exit: PollingManager::internalRun, looped over all sequences, sleeping");
return true;
}
entry = (SequenceEntry) allSequencesList.get(nextIndex++);
long now = System.currentTimeMillis();
Long time = (Long) pollTimes.get(entry.getSequenceId());
if(time != null && (now - time.longValue()) < POLLING_MANAGER_WAIT_TIME) {
// We have polled for this sequence too recently, so skip over this one
if (log.isDebugEnabled()) log.debug("Exit: PollingManager::internalRun, skipping sequence, not sleeping");
return false;
}
pollTimes.put(entry.getSequenceId(), new Long(now));
}
if(log.isDebugEnabled()) log.debug("Chose sequence " + entry.getSequenceId());
t = storageManager.getTransaction();
if(entry.isRmSource()) {
pollRMSSide(entry, forcePoll);
} else {
pollRMDSide(entry, forcePoll);
}
if(t != null) t.commit();
t = null;
} catch (Exception e) {
if(log.isDebugEnabled()) log.debug("Exception", e);
} finally {
if(t != null && t.isActive()) {
try {
t.rollback();
} catch(Exception e2) {
if(log.isDebugEnabled()) log.debug("Exception during rollback", e2);
}
}
}