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 void LoadSnapshot(long recordingId)
{
using (AeronArchive archive = AeronArchive.Connect(archiveCtx))
{
RecordingExtent recordingExtent = new RecordingExtent();
if (0 == archive.ListRecording(recordingId, recordingExtent))
{
throw new System.InvalidOperationException("Could not find recordingId: " + recordingId);
}
string channel = ctx.ReplayChannel();
int streamId = ctx.ReplayStreamId();
long length = recordingExtent.stopPosition - recordingExtent.startPosition;
int sessionId = (int)archive.StartReplay(recordingId, 0, length, channel, streamId);
string replaySessionChannel = ChannelUri.AddSessionId(channel, sessionId);
using (Subscription subscription = aeron.AddSubscription(replaySessionChannel, streamId))
{
Image image = AwaitImage(sessionId, subscription);
LoadState(image);
service.OnLoadSnapshot(image);
}
}
}
private void LoadSnapshot(long recordingId)
{
using (AeronArchive archive = AeronArchive.Connect(archiveCtx))
{
string channel = ctx.ReplayChannel();
int streamId = ctx.ReplayStreamId();
int sessionId = (int)archive.StartReplay(recordingId, 0, AeronArchive.NULL_LENGTH, channel, streamId);
string replaySessionChannel = ChannelUri.AddSessionId(channel, sessionId);
using (Subscription subscription = aeron.AddSubscription(replaySessionChannel, streamId))
{
Image image = AwaitImage(sessionId, subscription);
LoadState(image);
service.OnLoadSnapshot(image);
}
}
}