fetch specific set of records for each poll without setting the flag in camel

Question

I need to pick all the messages from db and send it for reprocessing.

my main requirement is

1. i should fetch only certain number of records for each poll a

Answer 1

You could use the Batch Consumer as described here - https://camel.apache.org/batch-consumer.html

Answer 2

Adding a trigger variable such as processedFlag is definitely the simplest way to go. Initially this variable is set to null.

Procedure:

1. Select all records where obj.processedFlag is not null.
2. Process the record.
3. After processing, set obj.processedFlag to a value ≠ null.
4. Begin at 1.

Not using a trigger variable would only produce a fair amount of headaches, I guess.