jamwang
asked on
Can you change classpath while the vm is executing?
Hi,
I have C app which uses JNI to bring up a vm to execute some methods.
Before, I brought up the vm, I set the class path in the VM's
initialization arguments and that works fine. But, the vm won't find the
class if you specify a class which is not in the class path. Is there
any way, you can change the class path while the vm is up in memory?
I tried a few ways. But, none seem to work. I first tried by resetting
the VM's init_args. This won't work unless you bring up another VM.
Another thing I tried was by calling putenv("classpath=exst classpath +
new cls path"). I thought this should work. But, it didn't. Does anyone
have comments on this or is there other ways of doing it?
Thanks,
Jamie
I have C app which uses JNI to bring up a vm to execute some methods.
Before, I brought up the vm, I set the class path in the VM's
initialization arguments and that works fine. But, the vm won't find the
class if you specify a class which is not in the class path. Is there
any way, you can change the class path while the vm is up in memory?
I tried a few ways. But, none seem to work. I first tried by resetting
the VM's init_args. This won't work unless you bring up another VM.
Another thing I tried was by calling putenv("classpath=exst classpath +
new cls path"). I thought this should work. But, it didn't. Does anyone
have comments on this or is there other ways of doing it?
Thanks,
Jamie
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The purpose of this removal was to stop users from doing preciseley what you are attempting, this beeing a posible breach of security.
There is no way that will work for applets. For standalone apps, you could exec() a bat/shell script. that modifies the CLASSPATH variable and the launches the new app in a new shell.
The only marginaly acceptable solution I can think of would be to use packages.