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BPMN-to-BPEL Implementation of Tasks and Events

In many cases, a BPMN element can be implemented as one or more BPEL activities, described in the tables below, which are the following BPMN types: tasks, throw events, and catch events.

For additional implementations, see BPMN-to-BPEL Implementation of Gateways and Control Flow.

Tasks

BPMN Task	BPEL Implementations
Service	Invoke
User	People activity, task type
Script	Assign
Rule	Invoke
Suspend	Suspend
Validate	Validate
Abstract	Empty
Manual	Empty People activity, task type
Send	Invoke Reply People activity, notification type
Receive	Receive

Throw Events

BPMN Throw Event	BPEL Implementation
None/Start/End	Empty Assign
Message	Reply Invoke People activity, notification type
Error	Throw Rethrow
Compensate	Compensate Compensate Scope
Terminate	Exit Break, implemented in a forEach

Catch Events

Any catch event can be dropped onto an activity's boundary to create a boundary event, or into a scope (event subprocess) to create a handler.

BPMN Catch Event	BPEL Implementation
Timer	Wait OnAlarm for pick or event handler
Message	Receive OnMessage for pick OnEvent for event handler
Error	Catch Catch all
Compensation	Scope compensation handler
Cancel	Scope termination handler