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There are many applications and scenarios in which a variety of integration techniques and security concerns may be at play causing the 3 integration patterns noted above to be applied.
Execution should be handled by Grouper Loader OTHER jobs making use of Quartz cron and supplying the needed parameters to control the jobs. There may be many jobs configured with different parameters. Parameters based on above include: limit_number_of_subjects, limit_size_of_message, stem_to_sync, message_type (sync-callback, fullsync) or it's all fullsync with the parameters governing behavior - a fullsync with no subjects implies callback.