Hi,
I'm working on an application that schedules resource transfers between two
webdav servers. The application gets two urls -- a source and destination
-- and pumps data from one into the other by the means of the following code:
InputStream in = sourceResource.getMethodData();
destinationResource.putMethod( in );
The problem is that the resources being transferred are huge media files
several hundred MBs in size. And, apparently, getMethodData() always
transfers the data to the local system first. Since I don't need a local
copy of the data, I'd like to be able to pump the data from one resource
directly to the other (via a small memory buffer). Is that currently
possible? How? If not, could the current implementation of the client be
modified to support such a behavior.
Another problem I have with the current behavior is that it unable to deal
with transfers of big files. Even though the client saves data to a
temporary local file, I still get an OutOfMemoryException when trying to
write to the destination:
java.lang.OutOfMemoryError:
at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:109)
at
org.apache.commons.httpclient.methods.PutMethod.sendData(PutMethod.java:187)
at
org.apache.webdav.lib.WebdavResource.putMethod(WebdavResource.java:2193)
at
org.apache.webdav.lib.WebdavResource.putMethod(WebdavResource.java:2174)
at
edu.ucsd.mediamanagerscheduler.TransferTask.run(TransferTask.java:46)
at java.util.TimerThread.mainLoop(Timer.java:435)
at java.util.TimerThread.run(Timer.java:385)
Plus, when this happens, the temporary files is permanently left on the
system (in my case, each file is at least 0.5GB in size, so this adds up
really fast).
Any recommendations?
Regards
Dmitry
---
Dmitry Beransky
Software Engineer
University of California, San Diego
Multimedia Interactive Learning Lab (http://mill.ucsd.edu)
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