Signature

Multiple Instances Without Prior Runtime Knowledge Pattern

Classification

Multi-instance Pattern

Intent

The number of concurrent threads is not known in advance at the design time and is calculated at runtime. However, the number of instances is not known until the last instance is executed. Concurrent thread synchronization must be performed.

Motivation

The determination of the number of instances will be performed at runtime; however, the determination of instances is deferred until the last instance gets executed. Instances can be executed in parallel/sequence and must be synchronized before completion.

Applicability

This refers to the multi-instance subprocess.

Implementation

The BPMN service engine runs a subprocess with a MultiInstance loop marker and will create a set of instances, one for...