/// <summary>
/// Makes Rebus "legacy compatible", i.e. enables wire-level compatibility with older Rebus versions. WHen this is enabled,
/// all endpoints need to be old Rebus endpoints or new Rebus endpoints with this feature enabled
/// </summary>
public static void EnableLegacyCompatibility(this OptionsConfigurer configurer)
{
configurer.Register<ISerializer>(c =>
{
var specialSettings = LegacySubscriptionMessagesBinder.JsonSerializerSettings;
var legacyEncoding = Encoding.UTF7;
var jsonSerializer = new JsonSerializer(specialSettings, legacyEncoding);
return jsonSerializer;
});
configurer.Decorate(c =>
{
var pipeline = c.Get<IPipeline>();
// map headers of incoming message from v1 to v2
pipeline = new PipelineStepConcatenator(pipeline)
.OnReceive(new MapLegacyHeadersIncomingStep(), PipelineAbsolutePosition.Front);
// unpack object[] of transport message
pipeline = new PipelineStepInjector(pipeline)
.OnReceive(new UnpackLegacyMessageIncomingStep(), PipelineRelativePosition.After, typeof (DeserializeIncomingMessageStep));
// pack into object[]
pipeline = new PipelineStepInjector(pipeline)
.OnSend(new PackLegacyMessageOutgoingStep(), PipelineRelativePosition.Before, typeof(SerializeOutgoingMessageStep));
pipeline = new PipelineStepInjector(pipeline)
.OnSend(new MapLegacyHeadersOutgoingStep(), PipelineRelativePosition.Before, typeof(SendOutgoingMessageStep));
//pipeline = new PipelineStepInjector(pipeline)
// .OnReceive(new HandleLegacySubscriptionRequestIncomingStep(c.Get<ISubscriptionStorage>(), c.Get<LegacySubscriptionMessageSerializer>()), PipelineRelativePosition.Before, typeof(MapLegacyHeadersIncomingStep));
return pipeline;
});
configurer.Decorate(c =>
{
var transport = c.Get<ITransport>();
if (transport is MsmqTransport)
{
c.Get<IRebusLoggerFactory>()
.GetCurrentClassLogger()
.Info("MSMQ transport detected - changing to UTF7 for serialized message header encoding");
((MsmqTransport) transport).UseLegacyHeaderSerialization();
}
return transport;
});
}
/// <summary>
/// Enables idempotent sagas. When enabled, sagas derived from <see cref="IdempotentSaga{TSagaData}"/> can be truly idempotent.
/// This means that the saga instance stores the IDs of all handled messages, including all outgoing messages send when handling
/// each incoming message - this way, the saga instance can guard itself against handling the same message twice, while still
/// preserving externally visible behavior even when a message gets handled more than once.
/// </summary>
public static void EnableIdempotentSagas(this OptionsConfigurer configurer)
{
configurer.Decorate<IPipeline>(c =>
{
var transport = c.Get<ITransport>();
var pipeline = c.Get<IPipeline>();
var incomingStep = new IdempotentSagaIncomingStep(transport);
var outgoingStep = new IdempotentSagaOutgoingStep();
var injector = new PipelineStepInjector(pipeline)
.OnReceive(incomingStep, PipelineRelativePosition.Before, typeof (DispatchIncomingMessageStep))
.OnSend(outgoingStep, PipelineRelativePosition.After, typeof (SendOutgoingMessageStep));
return injector;
});
}
public void CanInjectStepAfterAnotherStep()
{
var pipeline = new DefaultPipeline()
.OnReceive(new Step1())
.OnReceive(new Step2())
.OnReceive(new Step3());
var injector = new PipelineStepInjector(pipeline)
.OnReceive(new InjectedStep(), PipelineRelativePosition.After, typeof(Step2));
var receivePipeline = injector.ReceivePipeline().ToArray();
Assert.That(receivePipeline.Select(s => s.GetType()), Is.EqualTo(new[]
{
typeof(Step1),
typeof(Step2),
typeof(InjectedStep),
typeof(Step3),
}));
}
/// <summary>
/// Makes Rebus "legacy compatible", i.e. enables wire-level compatibility with older Rebus versions. WHen this is enabled,
/// all endpoints need to be old Rebus endpoints or new Rebus endpoints with this feature enabled
/// </summary>
public static void EnableLegacyCompatibility(this OptionsConfigurer configurer)
{
configurer.Register(c => new LegacyFlag());
configurer.Register<ISerializer>(c =>
{
var specialSettings = LegacySubscriptionMessagesBinder.JsonSerializerSettings;
var legacyEncoding = Encoding.UTF7;
var jsonSerializer = new JsonSerializer(specialSettings, legacyEncoding);
return jsonSerializer;
});
configurer.Decorate(c =>
{
var pipeline = c.Get<IPipeline>();
// map headers of incoming message from v1 to v2
pipeline = new PipelineStepConcatenator(pipeline)
.OnReceive(new MapLegacyHeadersIncomingStep(), PipelineAbsolutePosition.Front);
// unpack object[] of transport message
pipeline = new PipelineStepInjector(pipeline)
.OnReceive(new UnpackLegacyMessageIncomingStep(), PipelineRelativePosition.After, typeof (DeserializeIncomingMessageStep));
// pack into object[]
pipeline = new PipelineStepInjector(pipeline)
.OnSend(new PackLegacyMessageOutgoingStep(), PipelineRelativePosition.Before, typeof(SerializeOutgoingMessageStep));
pipeline = new PipelineStepInjector(pipeline)
.OnSend(new MapLegacyHeadersOutgoingStep(), PipelineRelativePosition.Before, typeof(SendOutgoingMessageStep));
//pipeline = new PipelineStepInjector(pipeline)
// .OnReceive(new HandleLegacySubscriptionRequestIncomingStep(c.Get<ISubscriptionStorage>(), c.Get<LegacySubscriptionMessageSerializer>()), PipelineRelativePosition.Before, typeof(MapLegacyHeadersIncomingStep));
return pipeline;
});
}
