Example usage for java.lang ThreadGroup enumerate

Introduction

In this page you can find the example usage for java.lang ThreadGroup enumerate.

Prototype

public int enumerate(ThreadGroup list[], boolean recurse)

Source Link

Document

Copies into the specified array references to every active subgroup in this thread group.

Usage

From source file:com.cyberway.issue.crawler.Heritrix.java

public String interrupt(String threadName) {
    String result = "Thread " + threadName + " not found";
    ThreadGroup group = Thread.currentThread().getThreadGroup();
    if (group == null) {
        return result;
    }//from   w  ww. j a v  a  2s.com
    // Back up to the root threadgroup before starting
    // to iterate over threads.
    ThreadGroup parent = null;
    while ((parent = group.getParent()) != null) {
        group = parent;
    }
    // Do an array that is twice the size of active
    // thread count.  That should be big enough.
    final int max = group.activeCount() * 2;
    Thread[] threads = new Thread[max];
    int threadCount = group.enumerate(threads, true);
    if (threadCount >= max) {
        logger.info("Some threads not found...array too small: " + max);
    }
    for (int j = 0; j < threadCount; j++) {
        if (threads[j].getName().equals(threadName)) {
            threads[j].interrupt();
            result = "Interrupt sent to " + threadName;
            break;
        }
    }
    return result;
}

From source file:org.infoglue.deliver.util.CacheController.java

private static void printThreads() {
    ThreadGroup tg = Thread.currentThread().getThreadGroup();
    int n = tg.activeCount();
    logger.warn("Number of active threads: " + n);
    Thread[] threadArray = new Thread[n];
    n = tg.enumerate(threadArray, false);
    for (int i = 0; i < n; i++) {
        String currentThreadId = "" + threadArray[i].getId();
        Thread t = threadArray[i];
        Map stacks = t.getAllStackTraces();

        Iterator stacksIterator = stacks.values().iterator();
        while (stacksIterator.hasNext()) {
            StackTraceElement[] el = (StackTraceElement[]) stacksIterator.next();

            String stackString = "";
            if (el != null && el.length != 0) {
                for (int j = 0; j < el.length; j++) {
                    StackTraceElement frame = el[j];
                    if (frame == null)
                        stackString += "    null stack frame" + "<br/>";
                    else
                        stackString += "    null stack frame" + frame.toString() + "<br/>";
                }/*from ww  w .jav a2  s  .co  m*/
                logger.warn("\n\nThreads:\n\n " + stackString);
            }
        }
    }
}