1 Reply Latest reply on May 2, 2005 11:57 AM by billstclair

Streaming large data

ffray Apr 27, 2005 6:12 AM

Hi guys!

I've been working on a project where support
for large images is needed (10 - 250 MB).
Instead of just uploading onto a plain file system
a process has to be executed for billing, notifying
the responsible persons, sorting the image into
the correct cathegories and so on.
So I thought j2ee could be a solution for our
next larger release for displacing our old solution.
But I found no explanation on how such huge amounts
of data could be handled. I'm searching for a solution
on NOT sending the whole image as byte [] due to
obviously reasons.
Is there any way to solve this? I've first tried around
whith the serialization-process, but I stuck.
Isn't there any way to use streaming instead of
loading all the data into the RAM?

Thanks in advance

FF

1. Re: Streaming large data

billstclair May 2, 2005 11:57 AM (in response to ffray)

I'm not sure I understand your problem well enough to answer, but I'll give a guess at it.

You should be able to "chunk" the data over the wire. Have a stateful bean on the server side with a read(int cnt) method that returns the data in chunks, as a byte[] array result, much like reading chunks of an InputStream. The drawback to this is that you'll garbage collect a lot on the client, since there's no way to tell RMI to put the result in a pre-allocated buffer, but it shouldn't be too bad.
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