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https://issues.apache.org/jira/browse/CAMEL-24190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-24190.
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Resolution: Not A Problem
> camel-file - GenericFileOnCompletion should support SynchronizationVetoable
> handover for stream download
> --------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-24190
> URL: https://issues.apache.org/jira/browse/CAMEL-24190
> Project: Camel
> Issue Type: Improvement
> Components: camel-file
> Reporter: Claus Ibsen
> Priority: Major
> Labels: improvement
>
> {{GenericFileOnCompletion}} implements plain {{Synchronization}}, which means
> it does not support handover. When a file consumer uses
> {{streamDownload=true}} and the route sends to an async endpoint like
> {{seda:}}, the on-completion fires immediately on the consumer thread
> (closing the stream via {{releaseRetrievedFileResources}}), before the
> downstream seda consumer thread has a chance to read the stream content.
> If {{GenericFileOnCompletion}} implemented {{SynchronizationVetoable}} with
> {{allowHandover() = true}}, the synchronization would transfer to the
> downstream thread and fire only after that thread finishes processing. This
> would make {{streamDownload=true}} safe to use with async endpoints like
> {{seda:}} and {{jms:}}.
> However, handover also means the completion runs on a different thread and
> could be deferred if the downstream queue is busy, which has implications for
> resource management (file handles, connections staying open longer).
> This affects all file-based consumers: camel-file, camel-ftp, camel-sftp,
> camel-smb.
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