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From "Claus Ibsen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CAMEL-1371) Resequencer - stream - add predicate to allow me to supply my own gap detection
Date Mon, 16 Mar 2009 06:35:40 GMT

    [ https://issues.apache.org/activemq/browse/CAMEL-1371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=50558#action_50558
] 

Claus Ibsen commented on CAMEL-1371:
------------------------------------

Martin. Feel free to go ahead. And no I do not mind if its a bit resequence specific.

And thank for the details about the ExpressionResultComparator.

> Resequencer - stream - add predicate to allow me to supply my own gap detection
> -------------------------------------------------------------------------------
>
>                 Key: CAMEL-1371
>                 URL: https://issues.apache.org/activemq/browse/CAMEL-1371
>             Project: Apache Camel
>          Issue Type: New Feature
>          Components: camel-core
>            Reporter: Claus Ibsen
>             Fix For: Future
>
>
> The resequencer stream based uses Long for gap detection as Camel then knows if there
is a gap if eg a number in between is missing.
> However sometimes you can not convert/compute a Long that is in sequence based on your
needs.
> Imagine you consume files from a folder and want them to be resequenced so you process
them in the correct order.
> The file names have this pattern: YYYYMMDD-DNNN.txt. Where YYYYMMDD is the date pattern
and D is a fixed string and NNN is a numeric value for that particular day.
> Eg: 20090223-D001.txt, 20090223-D002.txt ...
> So if we could add a predicate to the resequencer where I could impl. the gap detection,
then I would be able to do:
> {code}
> from("file://inbox").resequence(header("CamelFileName")).gapPredicate(new MyGapPredicate()).timeout(60000).to("bean:processFileInSequence");
> {code}
> Where *gapPredicate* is the new feature. Think about a better name for it, than gap predicate!!

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