/**
* Called from the {@link Receiver} thread to processing any pending loss of packets.
*
* @return number of work items processed.
*/
int processPendingLoss() {
int workCount = 0;
final long changeNumber = endLossChange;
if (changeNumber != lastLossChangeNumber) {
final int termId = lossTermId;
final int termOffset = lossTermOffset;
final int length = lossLength;
UNSAFE
.loadFence(); // LoadLoad required so previous loads don't move past version check below.
if (changeNumber == beginLossChange) {
if (isReliable) {
channelEndpoint.sendNakMessage(
controlAddress, sessionId, streamId, termId, termOffset, length);
nakMessagesSent.orderedIncrement();
} else {
final UnsafeBuffer termBuffer = termBuffers[indexByTerm(initialTermId, termId)];
if (tryFillGap(rawLog.logMetaData(), termBuffer, termId, termOffset, length)) {
lossGapFills.orderedIncrement();
}
}
lastLossChangeNumber = changeNumber;
workCount = 1;
}
}
return workCount;
}
/**
* Called from the {@link Receiver} thread to check for initiating an RTT measurement.
*
* @param now in nanoseconds
* @return number of work items processed.
*/
int initiateAnyRttMeasurements(final long now) {
int workCount = 0;
if (congestionControl.shouldMeasureRtt(now)) {
channelEndpoint.sendRttMeasurement(controlAddress, sessionId, streamId, now, 0, true);
workCount = 1;
}
return workCount;
}
/**
* Called from the {@link Receiver} to send any pending Status Messages.
*
* @return number of work items processed.
*/
int sendPendingStatusMessage() {
int workCount = 0;
if (ACTIVE == status) {
final long changeNumber = endSmChange;
if (changeNumber != lastSmChangeNumber) {
final long smPosition = nextSmPosition;
final int receiverWindowLength = nextSmReceiverWindowLength;
UNSAFE.loadFence(); // LoadLoad required so previous loads don't move past version check
// below.
if (changeNumber == beginSmChange) {
final int termId =
computeTermIdFromPosition(smPosition, positionBitsToShift, initialTermId);
final int termOffset = (int) smPosition & termLengthMask;
channelEndpoint.sendStatusMessage(
controlAddress,
sessionId,
streamId,
termId,
termOffset,
receiverWindowLength,
(byte) 0);
statusMessagesSent.orderedIncrement();
lastSmChangeNumber = changeNumber;
workCount = 1;
}
}
}
return workCount;
}
/**
* Remove this image from the {@link DataPacketDispatcher} so it will process no further packets
* from the network. Called from the {@link Receiver} thread.
*/
void removeFromDispatcher() {
channelEndpoint.removePublicationImage(this);
}
/**
* Get the string representation of the channel URI.
*
* @return the string representation of the channel URI.
*/
public String channelUriString() {
return channelEndpoint.originalUriString();
}