|
|
|
 |
|
 |
|
Confirmation: A Solution for Non-Compensatability in Workflow Applications
|
C. Liu,
M. Orlowska,
X. Zhou,, and
X. Lin
View Paper (PDF)
Return to Poster Session 1: WWW, Integration, Workflow
The notion
of a compensation is widely used in advanced transaction models as means of
recovery from a failure. Similar concepts are adopted for providing ``transaction-like''
behaviour for long business processes supported by workflows technology.
Generally, designing a compensating task in the context of a workflow process
is a non-trivial job. In fact, not every task is compensatable since the
forcibility of ``reverse'' operations of the task is not always guaranteed by
the application semantics. In addition, the isolation requirement on data
resources may make a task difficult to compensate. In this paper, we introduce
a new concept called confirmation. By using confirmation, we can modify some
originally non-compensatable tasks so that they become compensatable. Upon
success of a workflow instance, the confirmation tasks of all executed tasks,
if defined, are required for execution. An object-oriented framework which
incorporates the confirmation concept is presented in this paper as well as its
implementation issues.
Copyright(C) 2000 ACM
|
|
|
|
|
|
|
