CODEWITHSUNDEEP
.netnservicebus
Dmitry Schetnikovich
Dmitry Schetnikovich

Reputation: 1782

NServiceBus message interception?

Is there any way to intercept messages in NServiceBus?

From now i can do it manually via introducing base message handler like this:

public abstract class MessageHandler<T> : IHandleMessages<T>
    where T : IMessage
{
    public IBus Bus { get; set; }

    protected abstract void HandleCommand(T command);

    public void Handle(T command)
    {
        // perform some logic on *command* before
        HandleCommand(command);
        // perform some logic on *command* after
    }
}

And the usage:

public class ConcreteMessageHandler : MessageHandler<ConcreteMessage>
{
    protected override void HandleCommand(ConcreteMessage message)
    {
        //handle command
    }
}

But doing this way i'm loosing an ability to subscribe to multiple messages (because i cannot inherit from multiple MessageHandler<> classes).

Upvotes: 3

Views: 1485

Answers (2)

Andreas &#214;hlund
Andreas &#214;hlund

Reputation: 5273

NServiceBus now has a wide range of extensibility options for the message handling pipeline see https://docs.particular.net/nservicebus/pipeline/ for more details

Upvotes: 1

Dan
Dan

Reputation: 326

If you are using NServiceBus V3, you can take a look at the IMutateOutgoingMessages and IMutateIncomingMessages interfaces.

http://support.nservicebus.com/customer/portal/articles/894155-nservicebus-message-mutators-sample

Or if you want to have the messages go through handlers in a specific order, check out this link:

http://support.nservicebus.com/customer/portal/articles/862397-how-do-i-specify-the-order-in-which-handlers-are-invoked-

Upvotes: 1

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