Re: how can i know from the java code that an applescript completed to run? - urgent

Itia Gerbi wrote:

I'm using:

Process p = Runtime.getRuntime().exec(i_cmdLine);

retVal = p.waitFor();

the waitFor() returns after the script was started to run,

but it doesn't wait for the for the script to be completed.

I need some indication to know when the apple script completed its work.

(in my case the script is generating some files, so I need to know when

the files where generated)

There's no way I know of to get what you want without some kind of

cooperation from the script that's running asynchronously.

The problem isn't unique to exec(), nor to scripts.  The problem is

fundamental to any kind of asynchronous operation.  If the async action

can't provide SOME kind of signifier, either as an intentional signifier or

as a side-effect, then it's simply impossible to accurately determine when

it's done.

An intentional signifier would be a file or an event that the script itself

creates or sends when it's done.

Side-effects would include things like looking for the appearance of a

file, looking for the termination of a descendant process, looking for the

absence of a process with a particular name, waiting a maximum elapsed

time, and other hacks.  These are all hacks, and unreliable.

Under normal scripting conditions, how would a scripter who's using the

script find out when it's finished?  To answer that, you need to refer to

the docs of the async script, or look at its source code.

  -- GG

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