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

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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About Jürgen Kress
As a middleware expert Jürgen works at Oracle EMEA Alliances and Channels, responsible for Oracle’s EMEA Fusion Middleware partner business. He is the founder of the Oracle SOA & BPM and the WebLogic Partner Communities and the global Oracle Partner Advisory Councils. With more than 5000 members from all over the world the Middleware Partner Community is the most successful and active community at Oracle. Jürgen manages the community with monthly newsletters, webcasts and conferences. He hosts his annual Fusion Middleware Partner Community Forums and the Fusion Middleware Summer Camps, where more than 200 partners get product updates, roadmap insights and hands-on trainings. Supplemented by many web 2.0 tools like twitter, discussion forums, online communities, blogs and wikis. For the SOA & Cloud Symposium by Thomas Erl, Jürgen is a member of the steering board. He is also a frequent speaker at conferences like the SOA & BPM Integration Days, JAX, UKOUG, OUGN, or OOP.

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