How to know BPEL process is running

Hi,
I have BPEL process which is triggerred by FileAdapter. File Adapter polls for every 120seconds and if any file exists, it reads and BPEL process is initiated.
As BPEL proccess is big and sometimes it executes more than 120seconds and it depends on environment with less load process faster and more load its takes more time.
Due to this is there a way to know BPEL process is running before fetching new file or before starting actual BPEL process.
JDev: 11.1.1.6.0
Thanks,
Bhaskar

Can a singleton bpel will resolve your problem ?
At a time only one bpel process will be running there wont be any parallel instances for that bpel. In that way there wont be any second instance created until the first instance has done with its job.
http://orasoa.blogspot.co.uk/2007/05/create-singleton-process.html
http://blogs.bpel-people.com/2009/04/writing-singleton-bpel-process.html
Give points - it is good etiquette to reward an answerer points (5 - helpful; 10 - correct) for their post if they answer your question.
Thanks,
Vijay

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