public void Cancel(Exception e)
{
Logging.Error("Cancelling execution of graph {0}, due to exception:\n{1}", this.Index, e);
lock (this)
{
if (this.currentState == InternalComputationState.Failed)
{
return;
}
this.currentState = InternalComputationState.Failed;
this.Exception = e;
if (this.Controller.NetworkChannel != null)
{
MessageHeader header = MessageHeader.GraphFailure(this.index);
SendBufferPage page = SendBufferPage.CreateSpecialPage(header, 0);
BufferSegment segment = page.Consume();
Logging.Error("Broadcasting graph failure message");
this.Controller.NetworkChannel.BroadcastBufferSegment(header, segment);
}
this.ProgressTracker.Cancel();
}
}
private void AnnounceStartup(int barrierId)
{
int seqno = this.GetSequenceNumber(-1);
SendBufferPage startupPage = SendBufferPage.CreateSpecialPage(MessageHeader.GenerateBarrierMessageHeader(barrierId), seqno, this.HeaderSerializer);
BufferSegment startupSegment = startupPage.Consume();
for (int i = 0; i < this.connections.Count - 2; ++i)
startupSegment.Copy();
for (int i = 0; i < this.connections.Count; ++i)
{
if (i != this.localProcessID)
{
Logging.Info("Sending startup message to process {0}", i);
this.SendBufferSegment(startupPage.CurrentMessageHeader, i, startupSegment);
}
}
}
public void AnnounceCheckpoint()
{
int seqno = this.GetSequenceNumber(-1);
SendBufferPage checkpointPage = SendBufferPage.CreateSpecialPage(MessageHeader.Checkpoint, seqno, this.Controller.SerializationFormat.GetSerializer<MessageHeader>());
BufferSegment checkpointSegment = checkpointPage.Consume();
for (int i = 0; i < this.connections.Count - 2; ++i)
checkpointSegment.Copy();
for (int i = 0; i < this.connections.Count; ++i)
{
if (i != this.localProcessID)
{
Logging.Info("Sending checkpoint message to process {0}", i);
this.SendBufferSegment(checkpointPage.CurrentMessageHeader, i, checkpointSegment);
}
}
}