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Mediator, the-always-give-response-pattern by using the Echo-reply by Eric Elzinga

Juergen Kress
PaaS Partner Adoption


Iimagen my usecase i subscribed to an eventbus solution (rabbitmq with some custom code to be able to publish to consumers based on the soap protocol).

The backend system which generated the notications can generate the next type of events :

— employeename got changed

The current subscription mechanism only allows me to subscribe based on the value of entity.
Since i’m not interested in all EMPLOYEE related events i need to do the filtering myself.

When i register myself as consumer on the event i need to configure a soap endpoint at which the event bus will deliver the soap envelope.
The definition of this soap interface defines a http sync operation. (http 200)

This means, when the event bus tries to deliver an event and it receives back a soap response with http200, the message will be removed from the queue (i have 1 queue dedicated for my consumer application).
When the event bus tries to deliver an event and it receives back a empty response with http202, the publish on the event bus will fail since it checks on a valid soap body response.

So..this is a bit of background information. Read the complete article here.

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