isolated task in java

Hi,

I want to do a task in a separate thread in java where the task is completely isolated from the outside world and there is no way for it to access the outside world variables. How to enforce this restriction practically as the task is written by anyone and I am providing a wrapper around a task to prevent it from accessing outside world.

Is it something that can be done in java?

thanks,
samit

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access the outside world variables

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Not sure what those are.

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to prevent it from accessing outside world.

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What does that mean?
If you can control the ClassLoader that the task uses, you can control what classes it can instantiate.

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Originally Posted by Norm

Not sure what those are.

outside the threads address space. e.g., class static variables that thread can access.

What does that mean?
If you can control the ClassLoader that the task uses, you can control what classes it can instantiate.

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if I use a different class loader to instantiate my thread, it could still access the statics inside other classes and other shared variables..

To isolate the task, you could start it in another JVM. You would need a very tight sandbox to isolate the program from the world.

What is the purpose of this isolation?

Have you looked at the SecurityManager class?

The purpose of the isolation is of critical centrality in providing design studies. In general, for simple designs, all that is needful is to code carefull with stringent observation of code correctness. If it is a real security issue, then then you need to come in from a differerent window of ideas.

If possible, provide short - fabricated code snippets to model the design concern.

Is this a student or study project?