Example usage for java.lang Thread enumerate

Introduction

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

Prototype

public static int enumerate(Thread tarray[]) 

Source Link

Document

Copies into the specified array every active thread in the current thread's thread group and its subgroups.

Usage

From source file:Main.java

public static void main(String[] args) {
    Thread t = Thread.currentThread();
    t.setName("java2s.com thread");

    System.out.println("Thread = " + t);

    int count = Thread.activeCount();
    System.out.println("currently active threads = " + count);

    Thread th[] = new Thread[count];
    Thread.enumerate(th);

    for (int i = 0; i < count; i++) {
        System.out.println(i + ": " + th[i]);
    }/*from w w  w . java 2s. c o m*/
}

---

From source file:MainClass.java

public static void main(String args[]) {
    Thread t = Thread.currentThread();
    t.setName("My Thread");
    t.setPriority(1);/*from   ww  w  .j  a  va  2 s.co m*/
    System.out.println("current thread: " + t);
    int active = Thread.activeCount();
    System.out.println("currently active threads: " + active);
    Thread all[] = new Thread[active];
    Thread.enumerate(all);
    for (int i = 0; i < active; i++) {
        System.out.println(i + ": " + all[i]);
    }
    Thread.dumpStack();
}

---

From source file:Main.java

public static String getAllThreadNames() {
    Thread[] array = new Thread[Thread.activeCount()];

    Thread.enumerate(array);

    String s = "";
    for (Thread t : array) {
        if (t != null) {
            s += t.getName() + ", ";
        }//from   w  w  w  .ja v a2 s. c  o  m
    }
    return s;
}

---

From source file:Main.java

private static int countThreads(String namePattern) {
    Thread[] list = new Thread[100];
    Thread.enumerate(list);
    int matches = 0;
    for (Thread element : list) {
        if (element != null) {
            if (element.getName().matches(namePattern) || element.getClass().getName().matches(namePattern)) {
                matches++;//w w  w  .  j  a v  a  2s  .c om
            }
        }
    }
    return matches;
}

---

From source file:Main.java

/**
 * @param name/*  www . ja  v a 2 s  .c  o  m*/
 * @return list of threads
 */
public static List<Thread> listThreadGroup(String name) {
    List<Thread> threads = new LinkedList<Thread>();
    ThreadGroup threadGroup = getThreadGroupByName(name, null);
    if (threadGroup != null) {
        int count = threadGroup.activeCount();
        Thread threadArray[] = new Thread[count];
        int threadCount = Thread.enumerate(threadArray);
        for (int index = 0; index < threadCount; index++) {
            threads.add(threadArray[index]);
        }
    }
    return threads;
}

---

From source file:com.nubits.nubot.utils.Utils.java

public static void logActiveThreads() {
    int active = Thread.activeCount();
    LOG.trace("currently active threads: " + active);
    Thread allThreads[] = new Thread[active];
    Thread.enumerate(allThreads);

    for (int i = 0; i < active; i++) {
        Thread t = allThreads[i];
        LOG.trace(i + ": " + t + " id: " + t.getId() + " name: " + t.getName() + " " + t.getContextClassLoader()
                + " group: " + t.getThreadGroup() + " alive" + t.isAlive());
        LOG.trace("super: " + t.getClass().getSuperclass());
    }/*w  ww . j  a  v a2  s  .  c  om*/

    if (active > maxThreadsError) {
        LOG.error("too many threads started");
    }
}

---

From source file:org.commonjava.indy.diag.data.DiagnosticsManager.java

public String getThreadDumpString() {
    Thread[] threads = new Thread[Thread.activeCount()];
    Thread.enumerate(threads);

    Map<Long, Thread> threadMap = new HashMap<>();
    Stream.of(threads).forEach(t -> threadMap.put(t.getId(), t));
    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    ThreadInfo[] threadInfos = threadMXBean.getThreadInfo(threadMXBean.getAllThreadIds(), 100);

    StringBuilder sb = new StringBuilder();
    Stream.of(threadInfos).forEachOrdered((ti) -> {
        if (sb.length() > 0) {
            sb.append("\n\n");
        }/*from  w ww.j  a v  a 2s  .c o  m*/

        String threadGroup = "Unknown";
        Thread t = threadMap.get(ti.getThreadId());
        if (t != null) {
            ThreadGroup tg = t.getThreadGroup();
            if (tg != null) {
                threadGroup = tg.getName();
            }
        }

        sb.append(ti.getThreadName()).append("\n  Group: ").append(threadGroup).append("\n  State: ")
                .append(ti.getThreadState()).append("\n  Lock Info: ").append(ti.getLockInfo())
                .append("\n  Monitors:");

        MonitorInfo[] monitors = ti.getLockedMonitors();
        if (monitors == null || monitors.length < 1) {
            sb.append("  -NONE-");
        } else {
            sb.append("\n  - ").append(join(monitors, "\n  - "));
        }

        sb.append("\n  Trace:\n    ").append(join(ti.getStackTrace(), "\n    "));

    });

    return sb.toString();
}

---

From source file:com.myJava.util.Util.java

public static void logAllThreadInformations() {
    int nb = Thread.activeCount();
    Thread[] th = new Thread[nb + 100];
    Thread.enumerate(th);
    boolean stop = false;
    Logger.defaultLogger().info("Thread information : " + nb + " threads.");
    for (int i = 0; i < th.length && !stop; i++) {
        if (th[i] == null) {
            stop = true;/*from   w  w  w  . ja v a 2  s .c  om*/
        } else {
            String header = "Thread " + i + " (" + th[i].getName() + " / " + th[i].getId() + ")";
            logThreadInformations(header, th[i]);
        }
    }
}

---

From source file:org.apache.bookkeeper.test.ZooKeeperUtil.java

public void sleepServer(final int seconds, final CountDownLatch l) throws InterruptedException, IOException {
    Thread[] allthreads = new Thread[Thread.activeCount()];
    Thread.enumerate(allthreads);
    for (final Thread t : allthreads) {
        if (t.getName().contains("SyncThread:0")) {
            Thread sleeper = new Thread() {
                public void run() {
                    try {
                        t.suspend();//w  w w.  j a  v  a 2 s  .  c  o  m
                        l.countDown();
                        Thread.sleep(seconds * 1000);
                        t.resume();
                    } catch (Exception e) {
                        LOG.error("Error suspending thread", e);
                    }
                }
            };
            sleeper.start();
            return;
        }
    }
    throw new IOException("ZooKeeper thread not found");
}

---

From source file:org.dacapo.harness.Tomcat.java

@SuppressWarnings("unused")
private void dumpThreads() {
    ThreadGroup tg = Thread.currentThread().getThreadGroup();
    int nThreads = tg.activeCount();
    Thread[] threads = new Thread[nThreads * 2];
    nThreads = Thread.enumerate(threads);
    System.out.printf("==================== Dumping %d Threads: ====================%n", nThreads);
    System.out.flush();//ww w  .j av a2 s .c o  m
    for (int i = 0; i < nThreads; i++) {
        if (threads[i] != null) {
            System.out.print(threads[i].getName() + ": ");
            StackTraceElement[] stack = threads[i].getStackTrace();
            for (int j = 0; j < stack.length; j++) {
                for (int k = 0; k < j; k++)
                    System.out.print("  ");
                System.out.println(stack[j].getClassName() + "." + stack[j].getMethodName() + ":"
                        + stack[j].getLineNumber() + " <- ");
            }
        } else {
            System.out.print("null ");
        }
        System.out.flush();
    }
    System.out.println();
    System.out.flush();
    System.out.printf("==================== Thread Dump End ====================%n");
}

---

• «
• 1
• 2
• »