Query pattern

The following pattern table explains the features of the query pattern:

Signature

Query Pattern/Query Instance Pattern

Classification

Correlation Pattern

Intent

To query an already executing process instance.

Motivation

Based on the process status or business logic, there are requirements to query an already running process for varied information.

Applicability

When a query event occurs, the regular flow of the process will be interrupted and the query event subprocess will execute in parallel with the main BPMN process.

Implementation

We can use the event subprocess to query an existing process without even interrupting the main process, and both the main process and the query event subprocess will run in ...

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