How to communicate between a JSP filter and a JAVA program

Question

Is there any way to send a string to a JAVA program from a JSP filter?

I tried sockets; didn't work.

I tried external files; didn't work.

So, I'm kind of at a Witt's end here on the subject.

Answer 1

What do you mean by sending a String to a Java program? Is the program on a separate process?

If that's the case and you need synchronous communication, you can definitely use TCP sockets or just UDP. Place the server socket on your Java program.

If you can run your Java Program as a separate thread on the Tomcat server, then it will be a better and faster solution. Just add the JAR file where your Java program is and launch it on a separate thread with a REQUEST queue to interact with the filter.