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Enterprise Integration with WSO2 ESB by Prabath Siriwardena

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Proxy Service

A proxy service provides a well-defined SOAP endpoint to the outside. In most of the cases, a proxy service, as its name implies, proxies a real, concrete business service. A proxy service may or may not have a one to one mapping to a business service. It can simply provide a level abstraction over one concrete service or many other business services. In WSO2 ESB, a proxy service is built with an In-Sequence, an Out-Sequence, and a fault sequence.

In-sequence

A request message coming in to a given proxy service will hit the In-Sequence defined for that proxy service.

Out-sequence

A response message coming from a concrete or a business service will go through the Out-Sequence defined for the corresponding proxy service.

Fault-sequence ...

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