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Application Developer's Guide
Developing Business Process Server adapters : About BP Server adapters : Synchronous adapters

Synchronous adapters

For synchronous Adapter worksteps, when you activate the adapter, the adapter calls the set methods, the perform method, and finally the get method. No matter how long the adapter execution takes, the BP Server and BPM Workflow engines wait for the task to finish.
The synchronous adapter is easy to create and manage. When finished, the dataslots results are consistent and passing information to other adapters is safe. Ensure that the dataslots (which the adapter is modifying) are modified before anyone else looks at them.
* Asynchronous adapters