Consume all files in aws S3 bucket where deleteAfterRead = false

The current AWS S3Consumer class has a problem if user supply the parameter deleteAfterRead=false. The S3Consumer will always consume the same files over and over again with the size of getMaxMessagesPerPoll().

After some code chasing, i think, the root cause is because the ListObjectsRequest does not has the previous marker value. Hence, i wonder if we could do something like below:

private string marker; // new line to define the marker string
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ListObjectsRequest listObjectsRequest = new ListObjectsRequest();
listObjectsRequest.setBucketName(bucketName);
listObjectsRequest.setPrefix(getConfiguration().getPrefix());
listObjectsRequest.setMaxKeys(maxMessagesPerPoll);
listObjectsRequest.setMarker(marker); // new line to set the marker

ObjectListing listObjects = getAmazonS3Client().listObjects(listObjectsRequest);
marker = listObjects.getMarker(); // where marker is track