private PassiveReadRequest StartRead()
{
NetworkChannel netChannel = this.m_netChannel;
PassiveReadRequest passiveReadRequest = new PassiveReadRequest(this, netChannel);
bool flag = false;
try
{
if (!this.Copier.TestHungPassiveBlockMode)
{
netChannel.StartRead(new NetworkChannelCallback(PassiveBlockMode.ReadCallback), passiveReadRequest);
flag = true;
}
}
finally
{
if (!flag)
{
PassiveBlockMode.Tracer.TraceError((long)this.GetHashCode(), "Failed to start async read");
}
}
return(passiveReadRequest);
}
private void ProcessReadCallback(PassiveReadRequest ioReq, int bytesAvailable, bool completionIsSynchronous, Exception readEx)
{
PassiveBlockMode.Tracer.TraceFunction <string>((long)this.GetHashCode(), "ProcessReadCallback({0}) entered", this.DatabaseName);
lock (this.m_workerLock)
{
this.DisableTimer();
Exception ex = null;
bool flag2 = false;
try
{
this.m_recursionDepth++;
DiagCore.RetailAssert(this.m_recursionDepth == 1 || completionIsSynchronous, "recursive async completion", new object[0]);
ioReq.CompletionWasProcessed = true;
if (completionIsSynchronous)
{
ioReq.CompletedSynchronously = completionIsSynchronous;
}
if (readEx != null)
{
PassiveBlockMode.Tracer.TraceError <string, Exception>((long)this.GetHashCode(), "ProcessReadCallback({0}) read failed: ex={1}", this.DatabaseName, readEx);
ex = new NetworkCommunicationException(this.Configuration.SourceMachine, readEx.Message, readEx);
}
else if (bytesAvailable == 0)
{
PassiveBlockMode.Tracer.TraceError <string>((long)this.GetHashCode(), "ProcessReadCallback({0}) active closed connection", this.DatabaseName);
ex = new NetworkEndOfDataException(this.Configuration.SourceMachine, ReplayStrings.NetworkReadEOF);
}
else if (ioReq.Channel != this.m_netChannel)
{
ex = new NetworkEndOfDataException(this.Configuration.SourceMachine, ReplayStrings.NetworkReadEOF);
flag2 = true;
ioReq.Channel.Close();
}
else if (!this.IsBlockModeActive)
{
PassiveBlockMode.Tracer.TraceError <string>((long)this.GetHashCode(), "Discarding read since BM was already terminated", this.DatabaseName);
}
else
{
QueuedBlockMsg queuedBlockMsg = this.ReadInputMessage(ioReq.Channel);
if (queuedBlockMsg != null)
{
this.ProcessInput(queuedBlockMsg);
if (BitMasker.IsOn((int)queuedBlockMsg.EmitContext.grbitOperationalFlags, 2))
{
this.HandleActiveDismount();
return;
}
if (BitMasker.IsOn((int)queuedBlockMsg.EmitContext.grbitOperationalFlags, 16))
{
this.Copier.TrackLastContactTime(queuedBlockMsg.MessageUtc);
}
}
if (this.m_recursionDepth == 1)
{
while (this.IsBlockModeActive)
{
PassiveReadRequest passiveReadRequest = this.StartRead();
if (!passiveReadRequest.CompletionWasProcessed)
{
if (!this.m_runningAcll)
{
this.ScheduleTimer();
break;
}
break;
}
}
}
else
{
PassiveBlockMode.Tracer.TraceDebug <int>((long)this.GetHashCode(), "Recursive read avoided. Depth={0}", this.m_recursionDepth);
}
}
}
catch (NetworkTransportException ex2)
{
ex = ex2;
}
catch (NetworkRemoteException ex3)
{
ex = ex3;
}
catch (GranularReplicationOverflowException ex4)
{
ex = ex4;
}
finally
{
this.m_recursionDepth--;
if (ex != null && !flag2)
{
this.Terminate();
}
PassiveBlockMode.Tracer.TraceFunction <string>((long)this.GetHashCode(), "ProcessReadCallback({0}) exits", this.DatabaseName);
}
}
}
private static void ReadCallback(object asyncState, int bytesAvailable, bool completionIsSynchronous, Exception e)
{
PassiveReadRequest passiveReadRequest = (PassiveReadRequest)asyncState;
passiveReadRequest.Manager.ProcessReadCallback(passiveReadRequest, bytesAvailable, completionIsSynchronous, e);
}