Invoke (Task)

In BPEL, an invoke activity (i.e. an <invoke> element) is used by a process to invoke Web service provided by partner. An invocation can be either synchronous (request and response) or asynchronous (one-way). For a synchronous invocation, only one task is drew. For an asynchronous invocation, two tasks are drew, with one connecting to external pool and another connecting from external pool.

A sample BPD with tasks

Note that not all types of task are supported by BPEL. Below is a list of supported type. The different in type support different kinds of BPEL properties.

• Service
• Send
• Receive
• User
• Manual
• Script
• Typeless (Without type)

Editing BPEL properties

To edit BPEL properties for a task, right click on the task and select Open BPEL Specification... from the popup menu. In the specification dialog box you can specify partner link, operation and/or variable.

To open BPEL specification