[jira] [Commented] (CAMEL-8539) S3 marker does not work

["James Lindstorff (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CAMEL-8539?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14956342#comment-14956342 ] 

James Lindstorff commented on CAMEL-8539:
-----------------------------------------

As I understand the AWS S3 client the marker is only for paging through a listObjects result and can not be use for detecting new items in a bucket. I think something like the idempotent option on the file-component is needed to use the S3consumer with deleteAfterRead set to false. There is a isTruncated() method on the objectlisting that indicates if there are more pages in the listing.

> S3 marker does not work
> -----------------------
>
>                 Key: CAMEL-8539
>                 URL: https://issues.apache.org/jira/browse/CAMEL-8539
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-aws
>    Affects Versions: 2.15.0
>            Reporter: Alexey Hanin
>
> S3Consumer doesn't set marker correctly, when {{deleteAfterRead}} is set to {{false}}. Therefore, on every subsequent poll, it starts from the beginning of the list.
> The reason for that is the following code in S3Consumer:
> {code:lang=java|title=S3Consumer.java}
>             if (!getConfiguration().isDeleteAfterRead()) {
>                 // where marker is track
>                 marker = listObjects.getMarker();
>             }
> {code}
> Accordingly to S3 client documentation, {{getMarker()}} return a marker previously set in request. Instead, {{getNextMarker()}} shall be used. Although, simply changing it to use {{getNextMarker()}} introduces an endless loop iterating over the same set of keys under the prefix, because when reached the end of the key set, {{getNextMarker()}} returns {{null}}, and on the next poll, the head of the list will be returned, and so on.



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