コード例 #1
0
        public void Oneway(Command command)
        {
            Exception error = null;

            lock (reconnectMutex)
            {
                if (IsShutdownCommand(command) && ConnectedTransport == null)
                {
                    if (command.IsShutdownInfo)
                    {
                        // Skipping send of ShutdownInfo command when not connected.
                        return;
                    }

                    if (command.IsRemoveInfo)
                    {
                        // Simulate response to RemoveInfo command
                        Response response = new Response();
                        response.CorrelationId = command.CommandId;
                        OnCommand(this, response);
                        return;
                    }
                }

                // Keep trying until the message is sent.
                for (int i = 0; !disposed; i++)
                {
                    try
                    {
                        // Wait for transport to be connected.
                        ITransport transport = ConnectedTransport;
                        DateTime   start     = DateTime.Now;
                        bool       timedout  = false;
                        while (transport == null && !disposed && connectionFailure == null)
                        {
                            int elapsed = (int)(DateTime.Now - start).TotalMilliseconds;
                            if (this.timeout > 0 && elapsed > timeout)
                            {
                                timedout = true;
                                Tracer.DebugFormat("FailoverTransport.oneway - timed out after {0} mills", elapsed);
                                break;
                            }

                            // Release so that the reconnect task can run
                            try
                            {
                                // This is a bit of a hack, what should be happening is that when
                                // there's a reconnect the reconnectTask should signal the Monitor
                                // or some other event object to indicate that we can wakeup right
                                // away here, instead of performing the full wait.
                                Monitor.Exit(reconnectMutex);
                                Thread.Sleep(100);
                                Monitor.Enter(reconnectMutex);
                            }
                            catch (Exception e)
                            {
                                Tracer.DebugFormat("Interrupted: {0}", e.Message);
                            }

                            transport = ConnectedTransport;
                        }

                        if (transport == null)
                        {
                            // Previous loop may have exited due to use being disposed.
                            if (disposed)
                            {
                                error = new IOException("Transport disposed.");
                            }
                            else if (connectionFailure != null)
                            {
                                error = connectionFailure;
                            }
                            else if (timedout)
                            {
                                error = new IOException("Failover oneway timed out after " + timeout + " milliseconds.");
                            }
                            else
                            {
                                error = new IOException("Unexpected failure.");
                            }
                            break;
                        }

                        // If it was a request and it was not being tracked by
                        // the state tracker, then hold it in the requestMap so
                        // that we can replay it later.
                        Tracked tracked = stateTracker.track(command);
                        lock (((ICollection)requestMap).SyncRoot)
                        {
                            if (tracked != null && tracked.WaitingForResponse)
                            {
                                requestMap.Add(command.CommandId, tracked);
                            }
                            else if (tracked == null && command.ResponseRequired)
                            {
                                requestMap.Add(command.CommandId, command);
                            }
                        }

                        // Send the message.
                        try
                        {
                            transport.Oneway(command);
                            stateTracker.trackBack(command);
                        }
                        catch (Exception e)
                        {
                            // If the command was not tracked.. we will retry in
                            // this method
                            if (tracked == null)
                            {
                                // since we will retry in this method.. take it
                                // out of the request map so that it is not
                                // sent 2 times on recovery
                                if (command.ResponseRequired)
                                {
                                    lock (((ICollection)requestMap).SyncRoot)
                                    {
                                        requestMap.Remove(command.CommandId);
                                    }
                                }

                                // Rethrow the exception so it will handled by
                                // the outer catch
                                throw e;
                            }
                        }

                        return;
                    }
                    catch (Exception e)
                    {
                        Tracer.DebugFormat("Send Oneway attempt: {0} failed: Message = {1}", i, e.Message);
                        Tracer.DebugFormat("Failed Message Was: {0}", command);
                        HandleTransportFailure(e);
                    }
                }
            }

            if (!disposed)
            {
                if (error != null)
                {
                    throw error;
                }
            }
        }
コード例 #2
0
        public void Oneway(Command command)
        {
            Exception error = null;

            try
            {
                reconnectMutex.WaitOne();

                if (IsShutdownCommand(command) && ConnectedTransport == null)
                {
                    if (command.IsShutdownInfo)
                    {
                        // Skipping send of ShutdownInfo command when not connected.
                        return;
                    }

                    if (command is RemoveInfo)
                    {
                        // Simulate response to RemoveInfo command
                        Response response = new Response();
                        response.CorrelationId = command.CommandId;
                        onCommand(this, response);
                        return;
                    }
                }
                // Keep trying until the message is sent.
                for (int i = 0; !disposed; i++)
                {
                    try
                    {
                        // Wait for transport to be connected.
                        ITransport transport = ConnectedTransport;
                        while (transport == null && !disposed &&
                               connectionFailure == null
                               // && !Thread.CurrentThread.isInterrupted()
                               )
                        {
                            Tracer.Info("Waiting for transport to reconnect.");
                            try
                            {
                                // Release so that the reconnect task can run
                                reconnectMutex.ReleaseMutex();
                                try
                                {
                                    // Wait for something
                                    Thread.Sleep(1000);
                                }
                                catch (ThreadInterruptedException e)
                                {
                                    Tracer.DebugFormat("Interrupted: {0}", e.Message);
                                }
                            }
                            finally
                            {
                                reconnectMutex.WaitOne();
                            }

                            transport = ConnectedTransport;
                        }

                        if (transport == null)
                        {
                            // Previous loop may have exited due to use being disposed.
                            if (disposed)
                            {
                                error = new IOException("Transport disposed.");
                            }
                            else if (connectionFailure != null)
                            {
                                error = connectionFailure;
                            }
                            else
                            {
                                error = new IOException("Unexpected failure.");
                            }
                            break;
                        }

                        // If it was a request and it was not being tracked by
                        // the state tracker, then hold it in the requestMap so
                        // that we can replay it later.
                        Tracked tracked = stateTracker.track(command);
                        lock (((ICollection)requestMap).SyncRoot)
                        {
                            if (tracked != null && tracked.WaitingForResponse)
                            {
                                requestMap.Add(command.CommandId, tracked);
                            }
                            else if (tracked == null && command.ResponseRequired)
                            {
                                requestMap.Add(command.CommandId, command);
                            }
                        }

                        // Send the message.
                        try
                        {
                            transport.Oneway(command);
                            stateTracker.trackBack(command);
                        }
                        catch (Exception e)
                        {
                            // If the command was not tracked.. we will retry in
                            // this method
                            if (tracked == null)
                            {
                                // since we will retry in this method.. take it
                                // out of the request map so that it is not
                                // sent 2 times on recovery
                                if (command.ResponseRequired)
                                {
                                    lock (((ICollection)requestMap).SyncRoot)
                                    {
                                        requestMap.Remove(command.CommandId);
                                    }
                                }

                                // Rethrow the exception so it will handled by
                                // the outer catch
                                throw e;
                            }
                        }

                        return;
                    }
                    catch (Exception e)
                    {
                        Tracer.DebugFormat("Send Oneway attempt: {0} failed.", i);
                        handleTransportFailure(e);
                    }
                }
            }
            finally
            {
                reconnectMutex.ReleaseMutex();
            }

            if (!disposed)
            {
                if (error != null)
                {
                    throw error;
                }
            }
        }