Starting and stopping a prog. from another prog.

[andoni.oconchubhair]

Hi,

I have a program (only 100 lines or less) that polls a web-service and
gives me the current status of the service. I want to run this program
on an infinite loop using Thread.sleep() to sleep for 5 mins. after
polling and have some way of starting and stopping it.

Can anyone tell me what I would have to do to achieve this?

I hve thought of having a "lock-file?". Basically just checking for the
existance of a file of a particular name and if it exists then breaking
out of the loop. Another way might be to spawn a thread which listens
for a keystroke using System.in but this would involve running the
program in the user-space only. I couldn't ever log off without
stopping the program.

So I'm sure there's a standard way that is much cleaner??

Thanks in advance for any suggestions,
Andoni.

 

[Martin Gregorie]

Hi,

I have a program (only 100 lines or less) that polls a web-service and
gives me the current status of the service. I want to run this program
on an infinite loop using Thread.sleep() to sleep for 5 mins. after
polling and have some way of starting and stopping it.

Can anyone tell me what I would have to do to achieve this?

I hve thought of having a "lock-file?". Basically just checking for the
existance of a file of a particular name and if it exists then breaking
out of the loop. Another way might be to spawn a thread which listens
for a keystroke using System.in but this would involve running the
program in the user-space only. I couldn't ever log off without
stopping the program.

So I'm sure there's a standard way that is much cleaner??

Listen on a socket for a datagram (UDP packet)? There may be simpler
ways but this way is at least OS agnostic.