/** Stops resending messages for the specified source sequence. */
public void stop(SourceSequence seq) {
synchronized (this) {
List<ResendCandidate> sequenceCandidates = getSequenceCandidates(seq);
if (null != sequenceCandidates) {
for (int i = sequenceCandidates.size() - 1; i >= 0; i--) {
ResendCandidate candidate = sequenceCandidates.get(i);
candidate.cancel();
}
LOG.log(Level.FINE, "Cancelled resends for sequence {0}.", seq.getIdentifier().getValue());
}
}
}
public void resume(SourceSequence seq) {
synchronized (this) {
String key = seq.getIdentifier().getValue();
List<ResendCandidate> sequenceCandidates = suspendedCandidates.remove(key);
if (null != sequenceCandidates) {
for (int i = 0; i < sequenceCandidates.size(); i++) {
ResendCandidate candidate = sequenceCandidates.get(i);
candidate.resume();
}
candidates.put(key, sequenceCandidates);
LOG.log(Level.FINE, "Resumed resends for sequence {0}.", key);
}
}
}
private void purgeCandidates(SourceSequence seq, boolean any) {
Collection<Long> purged = new ArrayList<Long>();
Collection<ResendCandidate> resends = new ArrayList<ResendCandidate>();
Identifier sid = seq.getIdentifier();
synchronized (this) {
LOG.fine("Start purging resend candidates.");
List<ResendCandidate> sequenceCandidates = getSequenceCandidates(seq);
if (null != sequenceCandidates) {
for (int i = sequenceCandidates.size() - 1; i >= 0; i--) {
ResendCandidate candidate = sequenceCandidates.get(i);
long m = candidate.getNumber();
if (any || seq.isAcknowledged(m)) {
sequenceCandidates.remove(i);
candidate.resolved();
unacknowledgedCount--;
purged.add(m);
resends.add(candidate);
}
}
if (sequenceCandidates.isEmpty()) {
candidates.remove(sid.getValue());
}
}
LOG.fine("Completed purging resend candidates.");
}
if (purged.size() > 0) {
RMStore store = manager.getStore();
if (null != store) {
store.removeMessages(sid, purged, true);
}
RMEndpoint rmEndpoint = seq.getSource().getReliableEndpoint();
for (ResendCandidate resend : resends) {
rmEndpoint.handleAcknowledgment(sid.getValue(), resend.getNumber(), resend.getMessage());
}
}
}
/**
* @param seq the sequence under consideration
* @return the list of resend candidates for that sequence
* @pre called with mutex held
*/
protected List<ResendCandidate> getSequenceCandidates(SourceSequence seq) {
return getSequenceCandidates(seq.getIdentifier().getValue());
}