Killing a process using sytem call from seam

[alankrum]

Im trying to kill a process from a class inside my seam project using a sytem call:


Process p;
p=Runtime.getRuntime().exec("kill -9 2447);


when i try to run the code i get the following error in the log:

WARN  [PermissionManager] no permission store available - please install a PermissionStore with the name 'org.jboss.seam.security.jpaPermissionStore' if permission management is required.


i'm new using this framework, i'm not sure whats going on.
i would appreciate if someone can help me.
cheers
alan

[gonorrhea]

That is a WARN level output.  It's stating that you have not setup any security for your app (most likely you are using Seam 2.1.x).

as far as killing a process from a Seam component, I've never even thought of or heard of that for a Seam app.  That's a strange requirement IMO.

There's a way to terminate the running JVM:

System.exit();

but you're trying to kill a specific process.  You may need to use JNI but not sure...

[alankrum]

im pretty sure that ¨kill -9 2447¨is triggering the warning
because if i change that line of code to

Process p;
p=Runtime.getRuntime().exec("mkdir new¨);

there is no warning in the log and the folder gets created.

but with:
Process p;
p=Runtime.getRuntime().exec("kill -9 2447¨);

i do get the warning and the process is not killed......

i am using Seam 2.1.1, do you think that by setting up security on my app i can get around this?
if yes, do you have any reference on how to do this?

thanks a lot

alan

[cash1981]

I think I had the same problem.
What I did as a workaround is creating a script that did the same thing. Remember to also dobbel check that the jboss or whoever the user is has killing rights.

[cash1981]

I have had no problem with this. Nor did I need a Conversation or Transactional.

I blogged a bit about it here: How to create and use webservice with seam

[nickarls]

Some conciderations:

1. kill only works on unix boxens


2. exec likes binaries. mkdir is a binary, kill is a shell builtin. You will probably need to execute a shell and execute the kill as a parameter

[alankrum]

i tried with a script already,
it is weird because if i run the script myself, the process gets killed, but if i run the script from my seam project it doesnt. i get the same warn as before.....

my user has killing rights, an im the one running jboss. i dont understand this

[alankrum]

can u explain me please how to execute a shell with kill as a parameter?
do you mean i should use a shell/bash script???

thanks

[nickarls]

Depends on the shell, I think -c is common. You could also script it.