Basically I have batch jobs that I need to run on many different web applications. The batch jobs call servlets that then create threads to do whatever task I need done behind the scenes. The servlets immediately return a message after starting the batch threaded job. However my understanding is that there can be issues with Tomcat detecting memory leaks if you have a thread spawned by a servlet. So I was wondering if there was a better way to trigger a thread.
-----Original Message----- From: Pradip Bhattacharya [mailto:pradip.bhattacha...@gmail.com] Sent: Tuesday, July 18, 2017 9:10 AM To: Tomcat Users List <users@tomcat.apache.org> Subject: Re: run thread from servlet Hello, I hope I understood the requirement correctly. I believe you can start EmailProcess thread by the context listener. This thread can wait on an object. And the servlet can enque the data in a concurrent queue, and then notify the object, on which EmailProcess thread is waiting. Is this EmailProcess is an asynchronous service to send emails ? Regards Pradip.B On Jul 18, 2017 7:27 PM, "Campbell, Lance" <la...@illinois.edu> wrote: Tomcat 8.0.x Question: I am wanting to know the proper way to start a thread from a servlet. Use Case: A batch process will call a URL that is a servlet. The servlet will call a processes that will trigger a thread to run to do a particular job. The thread will run for a while. The servlet will not wait on the thread to finish running. Also the thread that is started is running a processes that requires there to only be one of these processes running at any given time. What I have done: I created a class I call EmailProcess. I have a static Boolean flag in the class called isWorking that indicates if the process is running. The class extends Runnable. The class also has a static method to start the thread if isWorking flag is false. I have a servlet that will call the static method in EmailProcess to start the thread if possible. Note: If the Tomcat container decides to clean up the servlet that is called that triggers the thread I don't want it to mess with the thread. I want it to keep on running. Thanks for your advice. Lance
