Example usage for java.util.concurrent Semaphore Semaphore

Introduction

In this page you can find the example usage for java.util.concurrent Semaphore Semaphore.

Prototype

public Semaphore(int permits, boolean fair)

Source Link

Document

Creates a Semaphore with the given number of permits and the given fairness setting.

Usage

From source file:Main.java

public static void main(String args[]) throws Exception {
    Semaphore sem = new Semaphore(1, true);
    Thread thrdA = new Thread(new MyThread(sem, "Message 1"));
    Thread thrdB = new Thread(new MyThread(sem, "Message 2"));

    thrdA.start();//  www . j  a  va 2  s.com
    thrdB.start();

    thrdA.join();
    thrdB.join();

}

From source file:Main.java

public static void main(String args[]) throws Exception {
    Semaphore sem = new Semaphore(1, true);
    Thread thrdA = new Thread(new SyncOutput(sem, "Message 1"));
    Thread thrdB = new Thread(new SyncOutput(sem, "Message 2!"));

    thrdA.start();//w ww  .ja  va  2 s .c o  m
    thrdB.start();

    thrdA.join();
    thrdB.join();

}

From source file:org.zkybase.kite.throttle.ThrottleTemplate.java

/**
 * @param limit// w ww.j a va  2 s.  c om
 * @throws IllegalArgumentException if limit &lt; 1
 */
public ThrottleTemplate(int limit) {
    if (limit < 1) {
        throw new IllegalArgumentException("limit must be >= 1");
    }
    this.limit = limit;
    this.semaphore = new Semaphore(limit, true);
}

From source file:org.zkybase.kite.guard.ConcurrencyThrottleTemplate.java

/**
 * Creates a concurrency throttle with the given limit. The throttle rejects requests in excess of the limit.
 * // ww  w. jav  a2  s  . c  om
 * @param limit concurrency limit
 * @throws IllegalArgumentException if limit &lt; 1
 */
public ConcurrencyThrottleTemplate(int limit) {
    if (limit < 1) {
        throw new IllegalArgumentException("limit must be >= 1");
    }
    this.limit = limit;
    this.semaphore = new Semaphore(limit, true);
}

From source file:org.opendaylight.sxp.route.core.RouteReactorZipImpl.java

/**
 * @param delegate service used for delegation
 *//*w  w w.j av a  2 s .  c o  m*/
public RouteReactorZipImpl(RouteReactor delegate) {
    this.delegate = Objects.requireNonNull(delegate);
    compressionQueue = new ArrayBlockingQueue<>(1, true);
    queueGuard = new Semaphore(1, true);
    updateRouteTask = createUpdateRoutingTask();
}

From source file:org.mapfish.print.output.NativeProcessOutputFactory.java

public NativeProcessOutputFactory(int maxProcesses) {
    runningProcesses = new Semaphore(maxProcesses, true);
    if (java.lang.management.ManagementFactory.getOperatingSystemMXBean().getName().toLowerCase()
            .contains("win")) {
        cmd = "convert";
    } else {/*from   ww w  .j  av  a2s . c om*/
        cmd = "/usr/bin/convert";
    }

    cmdArgs.add("-density");
    cmdArgs.add("@@dpi@@x@@dpi@@");
    cmdArgs.add("-append");
    cmdArgs.add("@@sourceFile@@");
    cmdArgs.add("@@targetFile@@");

    formats.add("jpg");
    formats.add("gif");
    formats.add("png");
    formats.add("bmp");
    formats.add("tif");
    formats.add("tiff");
}

From source file:edu.illinois.enforcemop.examples.jbosscache.PessimisticSyncReplTxTest.java

@Before
public void setUp() throws Exception {
    t1_ex = t2_ex = null;// w w  w .  j  av  a 2s .  c  o  m
    lock = new Semaphore(1, true);
    initCaches(Configuration.CacheMode.REPL_SYNC);
}

From source file:org.videolan.myvlc.core.gui.NewSidebarAdapter.java

public NewSidebarAdapter() {
    mInflater = LayoutInflater.from(MyVLCApp.getAppContext());
    mMapFragment = new HashMap<String, Fragment>(lstEntrie.size());
    mMapFragmentAdded = new HashMap<String, Boolean>(lstEntrie.size());
    mSemaphore = new Semaphore(1, true);
}

From source file:org.videolan.vlc.gui.SidebarAdapter.java

public SidebarAdapter() {
    mInflater = LayoutInflater.from(VLCApplication.getAppContext());
    mFragments = new HashMap<String, Fragment>(entries.size());
    mFragmentAdded = new HashMap<String, Boolean>(entries.size());
    mSemaphore = new Semaphore(1, true);
}

From source file:com.indeed.imhotep.web.ExecutionManager.java

private synchronized Semaphore getUserSemaphore(String username) {
    Semaphore semaphore = userToLock.get(username);
    if (semaphore == null) {
        semaphore = new Semaphore(maxQueriesPerUser, true);
        userToLock.put(username, semaphore);
    }//from   w  ww . ja v  a  2s  . co m
    return semaphore;
}