Re: File I/O in EJBs

I am not sure whether the following fits your requirements.
But consider using BLOB or CLOB fields in a database to store files and
then access them
using JDBC
~ranjith

Nicholas wrote:

>The spec is quite specific in the prohibition of the
>use of java.io package classes in EJBs, due to
>platform differences and the lack of enterprise
>robustness.
>
>However, JNDI has a file system based implementation
>which works quite nicely in EJBs which might be a good
>work around for you.
>
>//Nicholas
>
>
>--- sven_van't_veer <[email protected]> wrote:
>
>
>>Cindy,
>>
>>The EJB specification prohibits writing to files.
>>EJB´s are transactional and clusterable objects.
>>files can neither take part in transactions nor can
>>the be written to in a cluster.
>>
>>Imagine you deploy yor bean in a cluster containing
>>10 boxes. you will never know which ejb will write
>>to the file and on what box.
>>
>>sven
>>
>>-----Original Message-----
>>From: Cindy hao [mailto:[email protected]]
>>Sent: Tuesday, July 15, 2003 2:55 PM
>>To: [email protected]
>>Subject: Re: File I/O in EJBs
>>
>>
>>Saravana,
>>
>>Thanks for responding to my email. You are
>>suggesting that EJBs can access
>>file I/O indirectly through some helper classes. But
>>my understanding is that
>>EJB can not access file I/O either directly or
>>indirectly.
>>
>>Cindy
>>
>>Saravana wrote:
>>
>>
>>
>>>Hi,
>>>        In EJB's to access a file as for my
>>>
>>>
>>knowledge, use a wrapper class
>>
>>
>>>and implement Streams in that. Return a String
>>>
>>>
>>from that method and parse
>>
>>
>>>the
>>>
>>>String using the parser, or do the processing in
>>>
>>>
>>the class it self. Hope
>>
>>
>>>this solves ur problem.
>>>
>>>Regards
>>>
>>>Saravana
>>>
>>>----- Original Message -----
>>>From: "Cindy hao" <[email protected]>
>>>To: <[email protected]>
>>>Sent: Tuesday, July 15, 2003 8:30 PM
>>>Subject: File I/O in EJBs
>>>
>>>
>>>
>>>>Hi,
>>>>Since file I/O is prohibited in EJBs, how to
>>>>
>>>>
>>access large and dynamic
>>
>>
>>>>generated files from EJBs? Would you please
>>>>
>>>>
>>recommend an approach or
>>
>>
>>>>approaches with the best Qos?
>>>>
>>>>Thanks in advance,
>>>>
>>>>Cindy Hao
>>>>
>>>>
>>>>
>>>>
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>=====
>Nicholas Whitehead
>Home: (973) 377 9335
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