ThreadUtil.java

package cn.mutils.core.runtime;

import java.util.Arrays;
import java.util.LinkedList;

/**
 * Thread utility of framework
 */
@SuppressWarnings("unused")
public class ThreadUtil {

    /**
     * Main thread group
     */
    public static final String GROUP_MAIN = "main";

    /**
     * Get main thread group
     */
    public static Thread[] getMainGroup() {
        return getGroup(GROUP_MAIN);
    }

    /**
     * Get threads for group
     */
    public static Thread[] getGroup(String name) {
        Thread[] activeThreads = new Thread[Thread.activeCount()];
        int enumCount = Thread.enumerate(activeThreads);
        LinkedList<Thread> group = new LinkedList<Thread>();
        for (int i = 0; i < enumCount; i++) {
            Thread t = activeThreads[i];
            ThreadGroup tGroup = t.getThreadGroup();
            if (tGroup == null) {
                continue;
            }
            String gName = tGroup.getName();
            if (gName != null && gName.equals(name)) {
                group.add(t);
            }
        }
        Arrays.fill(activeThreads, null);
        Thread[] groupThreads = new Thread[group.size()];
        group.toArray(groupThreads);
        group.clear();
        return groupThreads;
    }

}