Critical Section groups are used to synchronize process instances. At run time, multiple process instances can be executed concurrently. You can use
Critical Section groups to synchronize the set of actions performed in the process across multiple process instances. Only one process instance can execute the
Critical Section group and its contents at any specified time. Other concurrently running process instances that are associated with the corresponding
Critical Section group wait at the start of the
Critical Section group, until the process instance that is currently executing complete the
Critical Section group.
General
The
General tab has the following fields.
Field
|
Description
|
Name
|
The name to be displayed as the label for the group in the process.
|
Group Type
|
The type of the group. The default is
Critical Section.
|
Timeout (msec)
|
The maximum time (in milliseconds) that a process instance waits at the start of the critical section group while another process instance is executing the critical section. When a timeout occurs, the process instance that is waiting to execute the critical section fails with an
Activity Timeout Exception.
The timeout field can be used to avoid deadlock situations.
|
Shared Lock
|
Select this check box to synchronize multiple critical section groups that use the same shared variable as a lock.
|
Shared Variable Type
|
This field appears only when the
Shared Lock check box is selected.
The
Shared Lock option can be defined using a
Module Shared Variable or a
Job Shared Variable. When a module shared variable is used against job shared variable to define
Shared Lock, it has different implications.
|
Shared Variable
|
This field appears only when the
Shared Lock check box is selected.
Name of the
Module Shared Variable or
Job Shared Variable.
|
Description
Provide a short description for the group in this field.
Variables
The
Variables tab provides a way to declare variables that are only limited to the scope of this group.
You can select from the following available
Variable Type options:
- String
- Integer
- Decimal
- Boolean
- Date&Time
Fault
The
Fault tab lists the possible exceptions generated by this activity.
For more information about error codes and the corrective action to take, see the
TIBCO BusinessWorks™ Container Edition Error Codes guide.
Fault
|
Generated When..
|
ActivityTimedOutException
|
A timeout has been reached.
|
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