public virtual void Send(Envelope env)
{
_log.Debug("Enter Send");
// guard clause
if (null == env)
{
throw new ArgumentNullException("Cannot send a null envelope");
}
// create a context
EnvelopeContext context = new EnvelopeContext(EnvelopeContext.Directions.Out, env);
// send the envelope through the outbound chain
this.ProcessEnvelope(context, this.OutboundChain.Sort(), () =>
{
// send the envelope to the transport provider
_txProvider.Send(context.Envelope);
// log the headers of the outgoing envelope
_log.Debug(string.Format("Outgoing headers: {0}", context.Envelope.Headers.Flatten()));
});
_log.Debug("Leave Send");
}
public void Should_Not_Continue_Processing_If_Processor_Does_Not_Call_Continuation()
{
// create an envelope and context
Envelope env = new Envelope() { Payload = Encoding.UTF8.GetBytes("Test") };
EnvelopeContext ctx = new EnvelopeContext(EnvelopeContext.Directions.In, env);
// mock a transport provider and envelope processor
Mock<ITransportProvider> txMock = _mocker.Create<ITransportProvider>();
Mock<IEnvelopeProcessor> procMock = _mocker.Create<IEnvelopeProcessor>();
// create a processor chain and add the mock processor to it
List<IEnvelopeProcessor> processorChain = new List<IEnvelopeProcessor>();
processorChain.Add(procMock.Object);
// the continuation that, if called, fails the test
Action continuation = new Action( () =>
Assert.Fail("The continuation action should not have been called"));
// this is what we're testing (extended class gives public access to protected method)
ExtendedDefaultEnvelopeBus bus = new ExtendedDefaultEnvelopeBus(txMock.Object);
bus.PublicProcessEnvelope(ctx, processorChain, continuation);
// make sure that the processor was called once
procMock.Verify(proc => proc.ProcessEnvelope(ctx, It.IsAny<Action>()), Times.Once());
// and that since it did nothing, the transport provider didn't get the envelope
txMock.Verify(tx => tx.Send(env), Times.Never());
}
public virtual void Handle_Dispatcher(IEnvelopeDispatcher dispatcher)
{
_log.Debug("Enter Handle_Dispatcher");
try
{
EnvelopeContext context = new EnvelopeContext(EnvelopeContext.Directions.In, dispatcher.Envelope);
// send the envelope through the inbound processing chain
this.ProcessEnvelope(context, this.InboundChain.Sort(), () =>
{
dispatcher.Dispatch(context.Envelope);
_log.Debug("Dispatched envelope");
});
}
catch (Exception ex)
{
_log.Warn("Failed to dispatch envelope; raising EnvelopeFailed event");
dispatcher.Fail(ex);
}
_log.Debug("Leave Handle_Dispatcher");
}
public virtual void Handle_Dispatcher(IEnvelopeDispatcher dispatcher)
{
_log.Debug("Enter Handle_Dispatcher");
try
{
EnvelopeContext context = new EnvelopeContext(EnvelopeContext.Directions.In, dispatcher.Envelope);
// send the envelope through the inbound processing chain
this.ProcessEnvelope(context, this.InboundChain.Sort(), () =>
{
dispatcher.Dispatch(context.Envelope);
_log.Debug("Dispatched envelope");
});
}
catch (Exception ex)
{
_log.Warn("Failed to dispatch envelope; raising EnvelopeFailed event");
dispatcher.Fail(ex);
}
_log.Debug("Leave Handle_Dispatcher");
}
// recursive function that processes envelopes
protected virtual void ProcessEnvelope(
EnvelopeContext context,
IEnumerable <IEnvelopeProcessor> processorChain,
Action processingComplete)
{
// if the chain is null or empty, complete processing
if ((null == processorChain) || (!processorChain.Any()))
{
processingComplete();
return;
}
// grab the next procesor
IEnvelopeProcessor nextProcessor = processorChain.First();
// let it process the envelope and pass its "next" processor: a
// method that recursively calls this function with the current
// processor removed
nextProcessor.ProcessEnvelope(context, () =>
{
this.ProcessEnvelope(context, processorChain.Skip(1), processingComplete);
});
}
public void PublicProcessEnvelope(EnvelopeContext context, IEnumerable<IEnvelopeProcessor> processorChain, Action processingComplete)
{
this.ProcessEnvelope(context, processorChain, processingComplete);
}
public void Should_Send_Incoming_Envelopes_Through_the_Chain()
{
// create an envelope and context
Envelope env = new Envelope() { Payload = Encoding.UTF8.GetBytes("Test") };
EnvelopeContext ctx = new EnvelopeContext(EnvelopeContext.Directions.In, env);
// mock a transport provider and envelope processor
Mock<ITransportProvider> txMock = _mocker.Create<ITransportProvider>();
Mock<IEnvelopeProcessor> procMock = _mocker.Create<IEnvelopeProcessor>();
Mock<IEnvelopeDispatcher> dispatcherMock = _mocker.Create<IEnvelopeDispatcher>();
dispatcherMock.SetupGet<Envelope>(disp => disp.Envelope).Returns(env);
DefaultEnvelopeBus bus = new DefaultEnvelopeBus(txMock.Object);
bus.OutboundChain = null;
bus.InboundChain = new Dictionary<int, IEnvelopeProcessor>();
bus.InboundChain.Add(0, procMock.Object);
txMock.Raise(tx => tx.OnEnvelopeReceived += null, dispatcherMock.Object);
procMock.Verify(
proc => proc.ProcessEnvelope(It.IsAny<EnvelopeContext>(), It.IsAny<Action>()), Times.Once());
}
// recursive function that processes envelopes
protected virtual void ProcessEnvelope(
EnvelopeContext context,
IEnumerable<IEnvelopeProcessor> processorChain,
Action processingComplete)
{
// if the chain is null or empty, complete processing
if ((null == processorChain) || (!processorChain.Any()))
{
processingComplete();
return;
}
// grab the next procesor
IEnvelopeProcessor nextProcessor = processorChain.First();
// let it process the envelope and pass its "next" processor: a
// method that recursively calls this function with the current
// processor removed
nextProcessor.ProcessEnvelope(context, () =>
{
this.ProcessEnvelope(context, processorChain.Skip(1), processingComplete);
});
}
public virtual void Send(Envelope env)
{
_log.Debug("Enter Send");
// guard clause
if (null == env) { throw new ArgumentNullException("Cannot send a null envelope"); }
// create a context
EnvelopeContext context = new EnvelopeContext(EnvelopeContext.Directions.Out, env);
// send the envelope through the outbound chain
this.ProcessEnvelope(context, this.OutboundChain.Sort(), () =>
{
// send the envelope to the transport provider
_txProvider.Send(context.Envelope);
// log the headers of the outgoing envelope
_log.Debug(string.Format("Outgoing headers: {0}", context.Envelope.Headers.Flatten()));
});
_log.Debug("Leave Send");
}
