Example usage for java.lang ThreadGroup activeCount

Introduction

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

Prototype

public int activeCount() 

Source Link

Document

Returns an estimate of the number of active threads in this thread group and its subgroups.

Usage

From source file:com.googlecode.psiprobe.controllers.threads.ListThreadsController.java

private List enumerateThreads(final Map classLoaderMap) {

    ///*from  w  ww.  ja va2 s  .com*/
    // get top ThreadGroup
    //
    ThreadGroup masterGroup = Thread.currentThread().getThreadGroup();
    while (masterGroup.getParent() != null) {
        masterGroup = masterGroup.getParent();
    }

    //
    // enumerate all Threads starting from top
    //
    List threadList = new ArrayList();

    Thread[] threads = new Thread[masterGroup.activeCount()];
    int numThreads = masterGroup.enumerate(threads);

    for (int i = 0; i < numThreads; i++) {
        ThreadModel threadModel = new ThreadModel();
        threadModel.setThreadClass(threads[i].getClass().getName());
        threadModel.setName(threads[i].getName());
        threadModel.setPriority(threads[i].getPriority());
        threadModel.setDaemon(threads[i].isDaemon());
        threadModel.setInterrupted(threads[i].isInterrupted());
        if (threads[i].getThreadGroup() != null) {
            threadModel.setGroupName(threads[i].getThreadGroup().getName());
        }
        Object target = Instruments.getField(threads[i], "target");
        if (target != null) {
            threadModel.setRunnableClassName(target.getClass().getName());
        }

        ClassLoader cl = threads[i].getContextClassLoader();
        if (cl != null) {
            if (classLoaderMap != null) {
                threadModel.setAppName((String) classLoaderMap.get(toUID(cl)));
            }
            threadModel.setClassLoader(toUID(cl));
        }
        threadList.add(threadModel);
    }
    return threadList;
}

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From source file:psiprobe.controllers.threads.ListThreadsController.java

/**
 * Enumerate threads.//from   www . j a v a2s. com
 *
 * @param classLoaderMap the class loader map
 * @return the list
 */
private List<ThreadModel> enumerateThreads(final Map<String, String> classLoaderMap) {

    // get top ThreadGroup
    ThreadGroup masterGroup = Thread.currentThread().getThreadGroup();
    while (masterGroup.getParent() != null) {
        masterGroup = masterGroup.getParent();
    }

    // enumerate all Threads starting from top
    List<ThreadModel> threadList = new ArrayList<>();

    Thread[] threads = new Thread[masterGroup.activeCount()];
    int numThreads = masterGroup.enumerate(threads);

    for (int i = 0; i < numThreads; i++) {
        ThreadModel threadModel = new ThreadModel();
        threadModel.setThreadClass(threads[i].getClass().getName());
        threadModel.setName(threads[i].getName());
        threadModel.setPriority(threads[i].getPriority());
        threadModel.setDaemon(threads[i].isDaemon());
        threadModel.setInterrupted(threads[i].isInterrupted());
        if (threads[i].getThreadGroup() != null) {
            threadModel.setGroupName(threads[i].getThreadGroup().getName());
        }
        Object target = Instruments.getField(threads[i], "target");
        if (target != null) {
            threadModel.setRunnableClassName(target.getClass().getName());
        }

        ClassLoader cl = threads[i].getContextClassLoader();
        if (cl != null) {
            if (classLoaderMap != null) {
                threadModel.setAppName(classLoaderMap.get(toUid(cl)));
            }
            threadModel.setClassLoader(toUid(cl));
        }
        threadList.add(threadModel);
    }
    return threadList;
}

---

From source file:net.testdriven.psiprobe.controllers.threads.ListThreadsController.java

private List enumerateThreads(final Map classLoaderMap) {

    ////from   w w  w  . j av a 2 s  . c  o  m
    // get top ThreadGroup
    //
    ThreadGroup masterGroup = Thread.currentThread().getThreadGroup();
    while (masterGroup.getParent() != null) {
        masterGroup = masterGroup.getParent();
    }

    //
    // enumerate all Threads starting from top
    //
    List<ThreadModel> threadList = new ArrayList<>();

    Thread[] threads = new Thread[masterGroup.activeCount()];
    int numThreads = masterGroup.enumerate(threads);

    for (int i = 0; i < numThreads; i++) {
        ThreadModel threadModel = new ThreadModel();
        threadModel.setThreadClass(threads[i].getClass().getName());
        threadModel.setName(threads[i].getName());
        threadModel.setPriority(threads[i].getPriority());
        threadModel.setDaemon(threads[i].isDaemon());
        threadModel.setInterrupted(threads[i].isInterrupted());
        if (threads[i].getThreadGroup() != null) {
            threadModel.setGroupName(threads[i].getThreadGroup().getName());
        }
        Object target = Instruments.getField(threads[i], "target");
        if (target != null) {
            threadModel.setRunnableClassName(target.getClass().getName());
        }

        ClassLoader cl = threads[i].getContextClassLoader();
        if (cl != null) {
            if (classLoaderMap != null) {
                threadModel.setAppName((String) classLoaderMap.get(toUID(cl)));
            }
            threadModel.setClassLoader(toUID(cl));
        }
        threadList.add(threadModel);
    }
    return threadList;
}

---

From source file:com.adito.setup.forms.SystemInfoForm.java

private void dumpThread(ThreadGroup group, int level, StringBuffer buf) {
    for (int i = 0; i < level; i++) {
        buf.append("  ");
    }//  w  w w  .  java  2s .  c  o  m
    buf.append("[");
    buf.append(group.getName());
    buf.append("]");
    Thread[] t = new Thread[group.activeCount()];
    group.enumerate(t);
    for (int i = 0; t != null && i < t.length; i++) {
        if (t[i].getThreadGroup() == group) {
            buf.append("\n");
            for (int j = 0; j < level + 1; j++) {
                buf.append("  ");
            }
            buf.append(t[i].getName());
            buf.append(" (pri. ");
            buf.append(t[i].getPriority());
            buf.append(")");
        }
    }
    ThreadGroup[] g = new ThreadGroup[group.activeGroupCount()];
    group.enumerate(g);
    for (int i = 0; g != null && i < g.length; i++) {
        buf.append("\n");
        dumpThread(g[i], level + 1, buf);
    }
}

---

From source file:haven.Utils.java

private static void dumptg(ThreadGroup tg, PrintWriter out, int indent) {
    for (int o = 0; o < indent; o++)
        out.print("    ");
    out.println("G: \"" + tg.getName() + "\"");
    Thread[] ths = new Thread[tg.activeCount() * 2];
    ThreadGroup[] tgs = new ThreadGroup[tg.activeGroupCount() * 2];
    int nt = tg.enumerate(ths, false);
    int ng = tg.enumerate(tgs, false);
    for (int i = 0; i < nt; i++) {
        Thread ct = ths[i];//from   w w w  .j av  a 2 s  . c om
        for (int o = 0; o < indent + 1; o++)
            out.print("    ");
        out.println("T: \"" + ct.getName() + "\"");
    }
    for (int i = 0; i < ng; i++) {
        ThreadGroup cg = tgs[i];
        dumptg(cg, out, indent + 1);
    }
}

---

From source file:ca.uviccscu.lp.server.main.ShutdownListener.java

public void threadReadout() {
    l.trace("Active thread readout");
    ThreadGroup tg = Thread.currentThread().getThreadGroup();
    while (tg.getParent() != null) {
        tg = tg.getParent();/*from w  w  w .  ja v  a  2  s .  c  o  m*/
    }
    Thread[] threads = new Thread[tg.activeCount() + 1024];
    tg.enumerate(threads, true);
    //VERY BAD WAY TO STOP THREAD BUT NO CHOICE - need to release the file locks
    for (int i = 0; i < threads.length; i++) {
        Thread th = threads[i];
        if (th != null) {
            l.trace("Thread " + i + " : " + th.getName());

        }
    }
}

---

From source file:com.agiletec.apsadmin.category.CategoryAction.java

/**
 * provide the result for the progress bar
 * @return/*from ww w. j  ava2  s. c  o  m*/
 */
public Map<String, Integer> getUpdateReferencesStatus() {
    int total = 0;
    int done = 0;
    ThreadGroup currentGroup = Thread.currentThread().getThreadGroup();
    int numThreads = currentGroup.activeCount();
    Thread[] listOfThreads = new Thread[numThreads];
    currentGroup.enumerate(listOfThreads);
    for (int i = 0; i < numThreads; i++) {
        if (listOfThreads[i].getName()
                .startsWith(CategoryManager.RELOAD_CATEGORY_REFERENCES_THREAD_NAME_PREFIX)) {
            ReloadingCategoryReferencesThread thread = (ReloadingCategoryReferencesThread) listOfThreads[i];
            total = total + thread.getListSize();
            done = done + thread.getListIndex();
        }
    }
    Map<String, Integer> result = new HashMap<String, Integer>();
    result.put("total", total);
    result.put("done", done);
    return result;
}

---

From source file:Main.java

public ThreadGroupDemo() {

    ThreadGroup pGroup = new ThreadGroup("Parent ThreadGroup");
    pGroup.setMaxPriority(Thread.MAX_PRIORITY - 2);

    ThreadGroup cGroup = new ThreadGroup(pGroup, "Child ThreadGroup");
    cGroup.setMaxPriority(Thread.NORM_PRIORITY);

    Thread t1 = new Thread(pGroup, this);
    t1.setPriority(Thread.MAX_PRIORITY);
    System.out.println("Starting " + t1.getName());
    t1.start();/*ww w.  j ava2 s .c o m*/

    Thread t2 = new Thread(cGroup, this);
    t1.setPriority(Thread.MAX_PRIORITY);
    System.out.println("Starting " + t2.getName());
    t2.start();

    System.out.println("Active threads in \"" + pGroup.getName() + "\" = " + pGroup.activeCount());

}

---

From source file:ca.uviccscu.lp.server.main.ShutdownListener.java

@Deprecated
public void threadCleanup(File f) {
    while (!deleteFolder(f, false, 0, 0)) {
        l.error("Trying to stop more threads, list:");
        //List remaining threads
        ThreadGroup tg2 = Thread.currentThread().getThreadGroup();
        while (tg2.getParent() != null) {
            tg2 = tg2.getParent();/* w w  w.j  av a  2 s.  co m*/
        }
        //Object o = new Object();
        //o.notifyAll();
        Thread[] threads = new Thread[tg2.activeCount() + 1024];
        tg2.enumerate(threads, true);
        //VERY BAD WAY TO STOP THREAD BUT NO CHOICE - need to release the file locks
        for (int i = 0; i < threads.length; i++) {
            Thread th = threads[i];
            if (th != null) {
                l.trace("Have thread: " + i + " : " + th.getName());
                if (th != null && th != Thread.currentThread()
                        && (AEThread2.isOurThread(th) || isAzThread(th))) {
                    l.trace("Suspending " + th.getName());
                    try {
                        th.suspend();
                        l.trace("ok");
                    } catch (SecurityException e) {
                        l.trace("Stop vetoed by SM", e);
                    }

                }
            }
        }
        for (int i = 0; i < threads.length; i++) {
            Thread th = threads[i];
            if (th != null) {
                l.trace("Have thread: " + i + " : " + th.getName());
                if (th != null && th != Thread.currentThread()
                        && (AEThread2.isOurThread(th) || isAzThread(th))) {
                    l.trace("Stopping " + th.getName());
                    try {
                        th.stop();
                        l.trace("ok");
                    } catch (SecurityException e) {
                        l.trace("Stop vetoed by SM", e);
                    }

                }
            }
        }
    }
    System.gc();
}

---

From source file:org.apache.atlas.web.resources.AdminResource.java

/**
 * Fetches the thread stack dump for this application.
 *
 * @return json representing the thread stack dump.
 *//*w w  w. j  a v  a2 s.  com*/
@GET
@Path("stack")
@Produces(MediaType.TEXT_PLAIN)
public String getThreadDump() {
    if (LOG.isDebugEnabled()) {
        LOG.debug("==> AdminResource.getThreadDump()");
    }

    ThreadGroup topThreadGroup = Thread.currentThread().getThreadGroup();

    while (topThreadGroup.getParent() != null) {
        topThreadGroup = topThreadGroup.getParent();
    }
    Thread[] threads = new Thread[topThreadGroup.activeCount()];

    int nr = topThreadGroup.enumerate(threads);
    StringBuilder builder = new StringBuilder();
    for (int i = 0; i < nr; i++) {
        builder.append(threads[i].getName()).append("\nState: ").append(threads[i].getState()).append("\n");
        String stackTrace = StringUtils.join(threads[i].getStackTrace(), "\n");
        builder.append(stackTrace);
    }

    if (LOG.isDebugEnabled()) {
        LOG.debug("<== AdminResource.getThreadDump()");
    }

    return builder.toString();
}

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