Source events
A source event is the change in state of an input that you designate as a trigger. A source event can be associated with a file, database, or message source. A source event can trigger a map component with or without a time trigger.
When the SourceEvent setting for a map input card is ON and the map has a time trigger, the setting is available. This setting controls the coordination of time and input events.
The following table describes the file, message, and database source events.
- Event
- Description
- File Event
- A change in state of that file, its creation, or a change in the time stamp for an
existing file.
If you use file triggers, you can enter the full path name for that file as the source name. You can also enter a path name relative to where the compiled map resides (that is, the .mmc file). The file name can also include wildcards, as described in Wildcards in Adapter Names.
- Message Event
- The occurrence of a new message in a messaging system
- Database Event
- Database modification that triggers a map.
Database sources for certain database types can be used as source events for the Launcher, which allow insertions, deletions, or
updates to database tables as the trigger mechanism that launches a map. The specific database
trigger activities (that is, insertions, updates or deletions) are defined for the query in the
Database Interface Designer. The event or events might be the result of a map or another
application. A typical use is to configure a trigger that launch a map to run when another map has
completed and modified a table. Note: For more information about database triggering, and the specific databases that support it, see Database Triggers in the Database Interface Designer documentation. For platform and version-specific information, see the release notes.