Claus Ibsen created CAMEL-26715:
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Summary: camel-core - Polling consumers: keep when a poll last
found something, and when it last polled
Key: CAMEL-26715
URL: https://issues.apache.org/jira/browse/CAMEL-26715
Project: Camel
Issue Type: Improvement
Components: camel-core
Reporter: Claus Ibsen
Fix For: 4.24.0
A route from a polling consumer (file, ftp, sql, jpa, timer-less scheduled
polls ...) that has nothing to do looks the same as one that is stuck: no
exchanges. Today ScheduledPollConsumer counts the polls (counter) and the
successful and failed polls in a row (successCounter, errorCounter), and has an
idle counter for the backoff, but it does not keep *when* a poll last found
something.
A count of empty polls does not help much: without the delay of the consumer
you cannot tell if 123 empty polls is two minutes or twelve seconds (delay=500,
delay=100, ...). A time does help: "the last poll that found something was 47s
ago", next to "the last poll was 0.5s ago" (so the scheduler is alive).
Proposal:
* ScheduledPollConsumer keeps the time of the last poll, and the time of the
last poll that polled messages (and how many it polled then).
* Exposed on ManagedScheduledPollConsumerMBean and in the consumer dev console.
* The timeline dev console (CAMEL-26691) and the Timeline/About screens of the
TUI (CAMEL-26700) use it for a polling route that is quiet: "polled nothing for
47s, last poll 0.5s ago" instead of an idle route, and a scheduler that stopped
polling stands out.
Raised on the walk of the Timeline without chaos (an idea from the CAMEL-26691
walk).
_Claude Code on behalf of Claus Ibsen_
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