Can a plugin auto-remove itself?

This is my question. For example, the plugin CANT continue beeing used because of X reason, can any piece code auto-remove the plugin once it's disabled? I that X reason make the plugin disable when running the server, after disabling, remove the .jar

 

I'm not so sure about this, but I may think that Java has an implemented method to schedule a file deletion as soon as it is not being used anymore. The problem is that it can't execute code while being deleted, meaning it's "impossible"?

 

hmm...
This may be what you look for.
http://stackoverflow.com/questions/12750975/how-to-delete-a-executing-jar-file

 

That would require an external plugin though, because it's not possible to execute something that isn't there.

If a plugin deletes itself, it has to execute code inside the plugin itself, but that code is deleted.
Unloading isn't a problem because Bukkit, or the file you put in your .bat file to make the server run handles that part.

 

SyTeck
Theoretically, if you create a new, thread then it will not be destroyed if the starting process run by another process is unloaded, however, I do believe there is something with threading mechanics that keeps it loaded, I might investigate this possibility when I have the time.

 

xTrollxDudex

I would think that as long as any one class that is in the jarfile isn't unloaded, the JVM would prevent the deletion of the file. Classloading is done irrespective of threads so I don't think there would be a way, as long as the class is loaded, and the stock JVM won't allow unloading a class while a reference still exists (as far as I know).

 

mythbusterma
If the plugin was disabled...?

 

xTrollxDudex
The thread to remove it would have to be declared somewhere in your jarfile though.

 

The plugin shouldn't be running the thread

 

Wouldn't you be able to select a file from a path and just delete through java? ._. Not sure but this is a guess

 

MajorSkillage Yes, but you won't be able to delete the file if it is being used by something. eg: craftbukkit

 

xTrollxDudex

Where would the deletion code be declared? Unless there's something in the Java standard API or Apache that allows for the scheduled deletion of a file without maintaining a reference to the thing that scheduled it. Although, I would suppose you could do this by scheduling a delayed task via the command input of a computer, though that would be platform dependant.

 

MetalGearDaner xTrollxDudex maybe a shutdown hook would work. thats the last thing that gets called when its disabled it also runs it on a seperate thread created by the shutdown hook. i dont think any references to the thread would ever be in the plugin.

 

How does hosting companies do it then?

And on top of that eclipse also does it when i go to export and it replaces a jar file

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

mythbusterma
There are numerous secret bukkit hooks in the cb code...?