Hello Pradip, Thanks for the comments. Could you please clarify the statement "the servlet can enque the data in a concurrent queue, and then notify the object " ? Would you assume that there would be two threads in the servlet ? One is context listener thread, and the other is enqueue data thread ? Thanks, Tom ________________________________________ From: Pradip Bhattacharya [pradip.bhattacha...@gmail.com] Sent: Tuesday, July 18, 2017 10:09 AM To: Tomcat Users List 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 ________________________________ This e-mail message (including any attachments) is for the sole use of the intended recipient(s) and may contain confidential and privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message (including any attachments) is strictly prohibited. If you have received this message in error, please contact the sender by reply e-mail message and destroy all copies of the original message (including attachments). --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
