On May 25, 2009, at 11:28 PM, Mario Ivankovits wrote:
Hi!
1. Is the LRUFilesCache safe for production use? GAE/J won't allow
using
the default SoftRefFilesCache because it doesn't allow background
threads.
I 've found a few really old messages saying things like
"SoftRefFilesCache
is the only implementation suitable for production use" and "other
file
cache implementation might cause resouce leaks", etc.
Yes, these messages are still true. Sad to say that, but I realized
that too late and planned to fix this, which is not that easy.
Using any thing else than the SoftRefFilesChache will introduce
memory leaks as the file-system object will not be discarded. You
have to call close() on the filesystem, or even better call close on
the DefaultFileSystemManager at all and do not use the
VFS.getManager() singleton approach.
That will also ensure that each and every resource used by the
underlaying libraries are closed then too.
Actually, I commented out the call to filesystemclose in
SoftRelFilesCache. While looking at the FileSystem implementation I
realized that the way close is implemented is not thread safe and
can't be called while the system is running. I believe the fix for
this is non-trivial.
Ralph
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org
For additional commands, e-mail: dev-h...@commons.apache.org
