This tutorial describes how to design and execute a sophisticated process that uses synchronous and asynchronous services, parallel flows of execution, conditional branching logic, fault handling and exceptions management, transformations, file adapter and database adapter functionality, and human workflow, notification, and sensor functionality. ...

This tutorial is divided into twelve separate phases. Each phase builds on the previous phase. You must complete each phase in the order described in this tutorial.

you learn how to build a simple asynchronous BPEL process for receiving an order from a client and obtaining a credit rating.
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Source: download-west.oracle.com