private void OnTakeSnapshot(long termPosition)
{
long recordingId;
string channel = ctx.SnapshotChannel();
int streamId = ctx.SnapshotStreamId();
using (AeronArchive archive = AeronArchive.Connect(archiveCtx))
using (Publication publication = archive.AddRecordedExclusivePublication(channel, streamId))
{
try
{
CountersReader counters = aeron.CountersReader();
int counterId = AwaitRecordingCounter(publication, counters);
recordingId = RecordingPos.GetRecordingId(counters, counterId);
SnapshotState(publication, termBaseLogPosition + termPosition);
service.OnTakeSnapshot(publication);
AwaitRecordingComplete(recordingId, publication.Position, counters, counterId, archive);
}
finally
{
archive.StopRecording(publication);
}
}
recordingLog.AppendSnapshot(recordingId, leadershipTermId, termBaseLogPosition, termPosition, timestampMs);
}
private long OnTakeSnapshot(long logPosition, long leadershipTermId)
{
long recordingId;
using (AeronArchive archive = AeronArchive.Connect(archiveCtx))
using (Publication publication = aeron.AddExclusivePublication(ctx.SnapshotChannel(), ctx.SnapshotStreamId()))
{
var channel = ChannelUri.AddSessionId(ctx.SnapshotChannel(), publication.SessionId);
long subscriptionId = archive.StartRecording(channel, ctx.SnapshotStreamId(), SourceLocation.LOCAL);
try
{
CountersReader counters = aeron.CountersReader();
int counterId = AwaitRecordingCounter(publication.SessionId, counters);
recordingId = RecordingPos.GetRecordingId(counters, counterId);
SnapshotState(publication, logPosition, leadershipTermId);
service.OnTakeSnapshot(publication);
AwaitRecordingComplete(recordingId, publication.Position, counters, counterId, archive);
}
finally
{
archive.StopRecording(subscriptionId);
}
}
return(recordingId);
}
private int AwaitRecordingCounter(Publication publication, CountersReader counters)
{
idleStrategy.Reset();
int counterId = RecordingPos.FindCounterIdBySession(counters, publication.SessionId);
while (CountersReader.NULL_COUNTER_ID == counterId)
{
CheckInterruptedStatus();
idleStrategy.Idle();
counterId = RecordingPos.FindCounterIdBySession(counters, publication.SessionId);
}
return(counterId);
}
private void AwaitRecordingComplete(
long recordingId,
long completePosition,
CountersReader counters,
int counterId,
AeronArchive archive)
{
idleStrategy.Reset();
do
{
idleStrategy.Idle();
CheckInterruptedStatus();
if (!RecordingPos.IsActive(counters, counterId, recordingId))
{
throw new InvalidOperationException("recording has stopped unexpectedly: " + recordingId);
}
archive.CheckForErrorResponse();
} while (counters.GetCounterValue(counterId) < completePosition);
}
