Workflow Lifecycles
In Zeebe, the workflow execution is represented internally by events of type WorkflowInstance
. The events are written to the log stream and can be observed by an exporter.
Each event is one step in a workflow instance. All events of one workflow instance have the same workflowInstanceKey
.
Events which belongs to the same element instance (e.g. a task) have the same key
. The element instances have different lifecycles depending on the type of element.
(Sub-)Process/Activity/Gateway Lifecycle​
Event Lifecycle​
Sequence Flow Lifecycle​
Example​
Intent | Element Id | Element Type |
---|---|---|
ELEMENT_ACTIVATING | order-process | process |
ELEMENT_ACTIVATED | order-process | process |
ELEMENT_ACTIVATING | order-placed | start event |
ELEMENT_ACTIVATED | order-placed | start event |
ELEMENT_COMPLETING | order-placed | start event |
ELEMENT_COMPLETED | order-placed | start event |
SEQUENCE_FLOW_TAKEN | to-collect-money | sequence flow |
ELEMENT_ACTIVATING | collect-money | task |
ELEMENT_ACTIVATED | collect-money | task |
ELEMENT_COMPLETING | collect-money | task |
ELEMENT_COMPLETED | collect-money | task |
SEQUENCE_FLOW_TAKEN | to-fetch-items | sequence flow |
... | ... | ... |
SEQUENCE_FLOW_TAKEN | to-order-delivered | sequence flow |
EVENT_ACTIVATING | order-delivered | end event |
EVENT_ACTIVATED | order-delivered | end event |
ELEMENT_COMPLETING | order-delivered | end event |
ELEMENT_COMPLETED | order-delivered | end event |
ELEMENT_COMPLETING | order-placed | process |
ELEMENT_COMPLETED | order-placed | process |