Complex Gateways
The Complex Gateway can be used to model complex synchronization behavior. An
Expression
activationCondition is used to describe the precise behavior. For example,
this Expression could specify that tokens on three out of five incoming
Sequence Flows are needed to activate the Gateway. What tokens are produced by the
Gateway is determined by conditions on the outgoing Sequence Flows as in the split behavior
of the Inclusive Gateway. If tokens arrive later on the two remaining Sequence Flows,
those tokens cause a reset of the Gateway and new token can be produced on the
outgoing Sequence Flows. To determine whether it needs to wait for additional tokens
before it can reset, the Gateway uses the synchronization semantics of the Inclusive
Gateway.