Release 10.1A: OpenEdge Development:
Messaging and ESB

> ## Sonic ESB-based services and WSA-based services

> Functionally, there is no practical difference between the OpenEdge Adapter for Sonic ESB and the OpenEdge Web Services Adapter (WSA). Both adapters perform the same conversions between the 4GL and SOAP protocols. By extension, an OpenEdge service of the Sonic ESB is essentially identical to a Progress 4GL Web service.

> Any service developed for use with the OpenEdge Adapter for Sonic ESB can function as a standard Web service, either in the context of Sonic ESB or in that of the WSA. Conversely, any existing Web service deployed to a WSA can be exported (by means of either the Progress Explorer or the WSAMAN Utility) and installed into the Sonic ESB environment with its runtime properties intact.

> Because of this close similarity between the two adapters, the same rules and guidelines apply in both cases to programming services and clients. The book OpenEdge Development: Web Services extensively discusses these topics in the context of the WSA. Please refer to that manual for programming information.

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