public void ApplyCommits(long from, long to)
{
Debug.Assert(to >= from);
foreach (var entry in PersistentState.LogEntriesAfter(from, to))
{
try
{
var oldCommitIndex = CommitIndex;
var command = PersistentState.CommandSerializer.Deserialize(entry.Data);
StateMachine.Apply(entry, command);
Debug.Assert(entry.Index == StateMachine.LastAppliedIndex);
if (_log.IsDebugEnabled)
{
_log.Debug("Committing entry #{0}", entry.Index);
}
var tcc = command as TopologyChangeCommand;
if (tcc != null)
{
if (_log.IsInfoEnabled)
{
_log.Info("ApplyCommits for TopologyChangedCommand, tcc.Requested = {0}, Name = {1}",
tcc.Requested, Name);
}
// StartTopologyChange(tcc); - not sure why it was needed, see RavenDB-3808 for details
CommitTopologyChange(tcc);
}
OnCommitIndexChanged(oldCommitIndex, CommitIndex);
OnCommitApplied(command);
}
catch (Exception e)
{
_log.Error("Failed to apply commit", e);
throw;
}
}
if (StateMachine.SupportSnapshots == false)
{
return;
}
var commitedEntriesCount = PersistentState.GetCommitedEntriesCount(to);
if (commitedEntriesCount >= Options.MaxLogLengthBeforeCompaction)
{
// we need to pass this to the state machine so it can signal us
// when it is fine to continue modifications again, otherwise
// we might start the snapshot in a different term / index than we
// are actually saying we did.
var allowFurtherModifications = new ManualResetEventSlim();
SnapshotAndTruncateLog(to, allowFurtherModifications);
allowFurtherModifications.Wait(CancellationToken);
}
}
