Java: How to stop a thread?
March 24, 2008 5 Comments
Sun deprecated Thread.stop() because it is unsafe. They didn’t provide any direct alternative for this operation; instead they are making us to reinvent the wheel. Here I am sharing my style of safe thread stop implementation.
public class CustomThread extends Thread {
private boolean shutdown;
@Override
public void run() {
while (true) {
if (shutdown) {
break;
}
// TODO: your actual task code goes here
if (shutdown) {
break;
}
try {
// your thread sleep interval
Thread.sleep(6000);
} catch (InterruptedException exp) {
// ignore this error
}
}
}
public void shutdown() {
if (isAlive()) {
this.shutdown = true;
this.interrupt();
try {
// wait till this thread dies
this.join();
} catch (InterruptedException e) {
// safe to ignore this error
}
}
}
}
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Hope the above code is self explanatory. I am happy with the above code because it uses most of the thread functions like join(), interrupt() and isAlive(). For web applications, threads can be started from context listener; you can invoke shutdown() method from Content Listener’s destroy() method. You can find more information in the below link.
http://java.sun.com/j2se/1.4.2/docs/guide/misc/threadPrimitiveDeprecation.html
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Venkat Sadasivam 
Found an another article that explains the power of interrupt concept.
http://www.ibm.com/developerworks/java/library/j-jtp05236.html
good one
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The producer–consumer problem (also known as the bounded-buffer problem) is a classic example of a multi-process synchronization problem. The problem describes two processes, the producer and the consumer, who share a common, fixed-size buffer used as a queue
Learn when and How to Stop the Thread,using jconsole or JvisualVM to indetify is the thread is running