Elias Levy created FLINK-11520: ---------------------------------- Summary: Triggers should be provided the window state Key: FLINK-11520 URL: https://issues.apache.org/jira/browse/FLINK-11520 Project: Flink Issue Type: Improvement Reporter: Elias Levy
Some triggers may require access to the window state to perform their job. Consider a window computing a count using an aggregate function. It may be desired to fire the window when the count is 1 and then at the end of the window. The early firing can provide feedback to external systems that a key has been observed, while waiting for the final count. The same problem can be observed in org.apache.flink.streaming.api.windowing.triggers.CountTrigger, which must maintain an internal count instead of being able to make use of the window state. -- This message was sent by Atlassian JIRA (v7.6.3#76005)