[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]
Interface for observing when an event expression needs to Start (by adding the first listener).
The publishing event expression supplies the callback used for indicating matches. The implementation supplies
as a return value the callback to use to Stop the event expression.
The following tables list the members exposed by the PatternStarter type.
Public Methods
Name | Description | |
---|---|---|
![]() | Start | An event expression was Started and supplies the callback to use when matching events appear.
Returns the callback to use to Stop the event expression.
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