Two Java program communicating..

[Sunil Kumar Gupta]

Hi All

I have a problem related to a java code. Please help me to solve the problem..


I have a java code which is say a thread which runs continously...
say

class MyRun extends Thread{
///////definition of MyRun class

//main method here
}

when i run this program, say java MyRun
Now my file is running properly.

Now i need to run another file say

class StopMyRun {
///class definition
//main method here
}

and i will run this file as

java StopMyRun

Now these two files are independent files having their own main method.

My problem is that, I have to stop MyRun Thread from my StopMyRun file.

For ex. I run MyRun program on one shell and when i run StopMyRun on other shell, The first one should stop their function.

How to do that, Any idea

[Edwin Dalorzo]

You have two different programs running on two different JVMs, you will need some sort of inter process communication. How about a socket, listening for the termination signal?

[Sunil Kumar Gupta]

Originally posted by Edwin Dalorzo:
You have two different programs running on two different JVMs, you will need some sort of inter process communication. How about a socket, listening for the termination signal?

Actually the first program is not generating any signal. I want to terminate that process as soon as i run another process.

Now any idea.

[Srinivasa Raghavan]

Why cant you use a flag in DB. Check that flaag at regular intervals & stop you first process ?

[Sunil Kumar Gupta]

Originally posted by Srinivasa Raghavan:
Why cant you use a flag in DB. Check that flaag at regular intervals & stop you first process ?

Actually i have no idea, when i have to stop that process. Whenever any user starts other process, it will automaticlly shutdown the first process. And problem is that these two process are running on different JVM's

[Srinivasa Raghavan]

When the second process starts running it should update the flag in th DB. The first process should check this flag in a seperate thread and exit when the flag gets updated..

[Sunil Kumar Gupta]

yes, i think you are right, But what if i am not using DB, Should i do this using any file instead of DB, Where i simply swicth the value , say from 1 to 2, and if 2 then exit first one..

[Tomasz Luchowski]

This is probably an overkill, but have you looked at Java Management Extensions (JMX)?

[Ulf Dittmer]

Edwins suggestion of using sockets is probably the simplest to implement, and it does not rely on any external resources (a database or a file system).
[ April 22, 2006: Message edited by: Ulf Dittmer ]