private async void ProcessSiloStoppingEvent_Impl()
{
if (logger.IsVerbose)
{
logger.Verbose("Processing silo stopping event");
}
// Select our nearest predecessor to receive our hand-off, since that's the silo that will wind up owning our partition (assuming
// that it doesn't also fail and that no other silo joins during the transition period).
if (silosHoldingMyPartition.Count == 0)
{
silosHoldingMyPartition.AddRange(localDirectory.FindPredecessors(localDirectory.MyAddress, 1));
}
// take a copy of the current directory partition
Dictionary <GrainId, IGrainInfo> batchUpdate = localDirectory.DirectoryPartition.GetItems();
try
{
await HandoffMyPartitionUponStop(batchUpdate, true);
localDirectory.MarkStopPreparationCompleted();
}
catch (Exception exc)
{
localDirectory.MarkStopPreparationFailed(exc);
}
}
private async void ProcessSiloStoppingEvent_Impl()
{
if (logger.IsVerbose)
{
logger.Verbose("Processing silo stopping event");
}
// As we're about to enter an async context further down, this is the latest opportunity to lock, modify and copy
// silosHoldingMyPartition for use inside of HandoffMyPartitionUponStop
List <SiloAddress> silosHoldingMyPartitionCopy;
lock (this)
{
// Select our nearest predecessor to receive our hand-off, since that's the silo that will wind up owning our partition (assuming
// that it doesn't also fail and that no other silo joins during the transition period).
if (silosHoldingMyPartition.Count == 0)
{
silosHoldingMyPartition.AddRange(localDirectory.FindPredecessors(localDirectory.MyAddress, 1));
}
silosHoldingMyPartitionCopy = silosHoldingMyPartition.ToList();
}
// take a copy of the current directory partition
Dictionary <GrainId, IGrainInfo> batchUpdate = localDirectory.DirectoryPartition.GetItems();
try
{
await HandoffMyPartitionUponStop(batchUpdate, silosHoldingMyPartitionCopy, true);
localDirectory.MarkStopPreparationCompleted();
}
catch (Exception exc)
{
localDirectory.MarkStopPreparationFailed(exc);
}
}