how to stop spring batch job launcher once it completed reading from queue.

We are using camel to read our file.After reading .csv file ,it will put the data as batch in the queue.
Currently in batch_job_execution table the exit_code is coming as "UNKNOWN" after competing the reading.

What we need to do for getting the exit_code as "COMPLETED".

current xml entry
-------------------
<step id="step1">
<tasklet>
<chunk reader="camelReader" writer="itemWriter"
commit-interval="1" reader-transactional-queue="true">
</chunk>
</tasklet>
<end on="*"/>
</step>

I have given <end on="*"/> tag inside the step.But it doesn't give any result.

ANy help from any body...