spring-projects/spring-integration — pull request #1165 by garyrussell (2014-05-21 21:46:15+00:00)
Title: INT-3413 Emit Event When an Agg, Expires a Group

JIRA: https://jira.spring.io/browse/INT-3413

Add MessageGroupExpiredEvent with group metadata
such as message count, last modified, whether
the group was discarded or not.