Working With Processes

The ProcessManagerService provides operations to retrieve the process templates that are defined on a node.

Listing Available Process Templates
There are three operations to retreive process templates: listProcessTemplates, queryProcessTemplates, and queryProcessTemplatesAlt.
Starting a Process Instance
Starting a process instance involves "creating" an instance of a process template.
Listing Available Process Instances
The ProcessManagerService service provides three operations to retrieve the current process instances: listProcessInstances, queryProcessInstances, and queryProcessInstancesAlt.
Sorting and Filtering Lists of Process Templates and Instances
The processManagement service operations can include a query parameter, which contains an expression defining the sort and/or filter criteria to be applied to different types of process list.
Process Instance State Transitions
Processes go through a series of state transactions.
Handling Process Instance Failures
A process instance may fail if an executing activity encounters an unexpected error condition (that is, one that is not caught and handled by the process itself).
Migrating a Process Instance to a Different Version
Process migration is the ability to migrate a long running process instance to a different version of the process template from which it was generated.