tree 58c925be59e3eb6ef6db4efb88c8f0c6eff3a319
parent 26fdd0e21ff1adb21e08dc09c60fc520720cf596
author Sven Selberg <svense@axis.com> 1510925061 +0100
committer Sven Selberg <svense@axis.com> 1517916547 +0100

Do not block Gerrit's event bus when queue is full

If rabbitmq goes down and the plugin cannot send messages for a long
enough time, the queue will eventually fill up. queue.put() will block
and wait for the publisher to start consuming from the queue and block
the event bus in Gerrit until queue is non-full.

Producer:
* If queue is full throw away incoming events instead of blocking.
Consumer:
* Wait for event to be available.
* If event is available: take event and wait for an open connection.
* If publish event fails and queue is full: throw away event.

Change-Id: Idbe6a344fbaa8ae8715a5ddac7a1b1e89204f436