Add option for scheduled polling consumer to emit an null message if there was
no messages to poll
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Key: CAMEL-4508
URL: https://issues.apache.org/jira/browse/CAMEL-4508
Project: Camel
Issue Type: Improvement
Components: camel-core
Reporter: Claus Ibsen
Fix For: 2.9.0
For example when people poll files, then they may want to react if there is no
files to pickup. Currently you would have to use a poll strategy, but we should
add an option you can configure on the endpoint, to have it emit an null
message instead.
sendEmptyMessageWhenIdle - false - If this option is true, and there was no
messages to poll, then we simulate processing a single message, by sending an
empty message.
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