Event Based Gateway
Use an Event Based Gateway when the Process path depends on which event occurs first — such as the receipt of a message by a participant. Use it when the continuation of the process depends on obtaining more data, to wait for a specific time or to meet a condition.
For example, when a condition of the Timer Intermediate Catch Event is set at 5 minutes:
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If the message arrives before the timer expires, Task A is performed.
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If no message is received within 5 minutes, the process continues with Task B.
Rules for Event Based Gateways
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The gateway must have two or more outgoing Sequence Flows.
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Outgoing Sequence Flows must not have a condition expression.
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Targets must be either Intermediate Events or Receive Tasks — not both.
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Target elements must not have additional incoming Sequence Flows.
Attributes
You’ll find Event Based Gateway attributes within the Attributes panel, under the Attributes tab.