Queue element

The execution of activities is managed by queue elements.

• Resource tasks: For each type of resource task, a dedicated queue element is present. It will be used to manage all resources that are part of the same pool.

• Script tasks and user tasks: One single queue element can be used to support all script and user tasks.

Queue elements are used for the following purposes:

• Preventing too many activities running at the same time.

• Making sure that a resource is not concurrently used by multiple process instances associated with the same activation window.

• Communicating with other queues when an activity completes and a next activity needs to be triggered.

• Triggering the execution of each type of task.