WorkflowIdentifier

Represents a Workflow's "identity" and is used by the runtime to determine whether a workflow is the same as one that was rendered in a previous render pass, in which case its state should be re-used; or if it's a new workflow and needs to be started.

A workflow's identity consists primarily of its concrete type (i.e. the class that implements the Workflow interface). Two workflows of the same concrete type are considered identical. However, if a workflow class implements ImpostorWorkflow, the identifier will also include that workflow's ImpostorWorkflow.realIdentifier.

Instances of this class are equatable and hashable.

Identifiers and snapshots

Since workflows can be serialized, workflows' identifiers must also be serializable in order to match workflows back up with their snapshots when restoring. However, some WorkflowIdentifiers may represent workflows that cannot be snapshotted. When an identifier is not snapshottable, toByteStringOrNull will return null, and any identifiers that reference ImpostorWorkflows whose ImpostorWorkflow.realIdentifier is not snapshottable will also not be snapshottable. Such identifiers are created with unsnapshottableIdentifier, but should not be used to wrap arbitrary workflows since those workflows may expect to be snapshotted.

Parameters