Modifying Files

blackers Jul 29, 2003 6:23 AM

It is my understanding that you are not supposed to deal with File i/o in EJB's. I have an applet that needs to modify the contents of a file on the server. What is the best way to go about this? In particular I need to copy the contents of one file to a new location when a function has been called in my EJB.

Any thoughts would be appreciated.

1. Re: Modifying Files

jonlee Jul 29, 2003 6:58 AM (in response to blackers)

You could build an MBean that performs the file I/O and the EJB could call the MBean or you could build an MBean that binds a writer object to the JNDI and the EJB can lookup an invoke that. That should satisfy the abstraction of EJBs from the file I/O layer.

Another way is to have your servlet talk HTTP and build a web application layer that on-sends the request to the EJB and at the end of it, if successful, write something to file - also saves the servlet from carrying around the JBoss client library.

Depends on your requirements, time frame, etc.

Obviously quite a few ways to do things but those are a couple of suggestions.
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2. Re: Modifying Files

blackers Jul 29, 2003 5:02 PM (in response to blackers)

Thanks. I think I will look into the MBean idea.
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3. Re: Modifying Files

jonlee Jul 29, 2003 8:35 PM (in response to blackers)

BTW, I meant applet not servlet. It was getting late at night.
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4. Re: Modifying Files

blackers Jul 30, 2003 5:10 AM (in response to blackers)

Cool, thanks
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