Examples with WeakReference java.lang.ref.WeakReference used on opensource projects

Example 86 with WeakReference

use of java.lang.ref.WeakReference in project jdk8u_jdk by JetBrains.

the class LWDispatcherMemoryLeakTest method init.

public static void init() throws Throwable {
    SwingUtilities.invokeAndWait(new Runnable() {

        @Override
        public void run() {
            frame = new JFrame();
            frame.setLayout(new FlowLayout());
            button = new WeakReference<JButton>(new JButton("Text"));
            p = new WeakReference<JPanel>(new JPanel(new FlowLayout()));
            p.get().add(button.get());
            frame.add(p.get());
            frame.setBounds(500, 400, 200, 200);
            frame.setVisible(true);
        }
    });
    Util.waitTillShown(button.get());
    Util.clickOnComp(button.get(), new Robot());
    SwingUtilities.invokeAndWait(new Runnable() {

        @Override
        public void run() {
            frame.remove(p.get());
        }
    });
    Util.waitForIdle(null);
    assertGC();
}

Example 87 with WeakReference

use of java.lang.ref.WeakReference in project jdk8u_jdk by JetBrains.

the class InputContextMemoryLeakTest method init.

public static void init() throws Throwable {
    SwingUtilities.invokeAndWait(new Runnable() {

        @Override
        public void run() {
            frame = new JFrame();
            frame.setLayout(new FlowLayout());
            JPanel p1 = new JPanel();
            button = new JButton("Test");
            p1.add(button);
            frame.add(p1);
            text = new WeakReference<JTextField>(new JTextField("Text"));
            p = new WeakReference<JPanel>(new JPanel(new FlowLayout()));
            p.get().add(text.get());
            frame.add(p.get());
            frame.setBounds(500, 400, 200, 200);
            frame.setVisible(true);
        }
    });
    Util.focusComponent(text.get(), 500);
    Util.clickOnComp(button, new Robot());
    //References to objects testes for memory leak are stored in Util.
    //Need to clean them
    Util.cleanUp();
    SwingUtilities.invokeAndWait(new Runnable() {

        @Override
        public void run() {
            frame.remove(p.get());
        }
    });
    Util.waitForIdle(null);
    //After the next caret blink it automatically TextField references
    Thread.sleep(text.get().getCaret().getBlinkRate() * 2);
    Util.waitForIdle(null);
    assertGC();
}

Example 88 with WeakReference

use of java.lang.ref.WeakReference in project jdk8u_jdk by JetBrains.

the class RuntimeThreadInheritanceLeak method main.

public static void main(String[] args) {
    System.err.println("\nRegression test for bug 4404702\n");
    /*
         * HACK: Work around the fact that java.util.logging.LogManager's
         * (singleton) construction also has this bug-- it will register a
         * "shutdown hook", i.e. a thread, which will inherit and pin the
         * current thread's context class loader for the lifetime of the VM--
         * by causing the LogManager to be initialized now, instead of by
         * RMI when our special context class loader is set.
         */
    java.util.logging.LogManager.getLogManager();
    /*
         * HACK: Work around the fact that the non-native, thread-based
         * SecureRandom seed generator (ThreadedSeedGenerator) seems to
         * have this bug too (which had been causing this test to fail
         * when run with jtreg on Windows XP-- see 4910382).
         */
    (new java.security.SecureRandom()).nextInt();
    RuntimeThreadInheritanceLeak obj = new RuntimeThreadInheritanceLeak();
    try {
        ClassLoader loader = URLClassLoader.newInstance(new URL[0]);
        ReferenceQueue refQueue = new ReferenceQueue();
        Reference loaderRef = new WeakReference(loader, refQueue);
        System.err.println("created loader: " + loader);
        Thread.currentThread().setContextClassLoader(loader);
        UnicastRemoteObject.exportObject(obj);
        Thread.currentThread().setContextClassLoader(ClassLoader.getSystemClassLoader());
        System.err.println("exported remote object with loader as context class loader");
        loader = null;
        System.err.println("nulled strong reference to loader");
        UnicastRemoteObject.unexportObject(obj, true);
        System.err.println("unexported remote object");
        /*
             * HACK: Work around the fact that the sun.misc.GC daemon thread
             * also has this bug-- it will have inherited our loader as its
             * context class loader-- by giving it a chance to pass away.
             */
        Thread.sleep(2000);
        System.gc();
        System.err.println("waiting to be notified of loader being weakly reachable...");
        Reference dequeued = refQueue.remove(TIMEOUT);
        if (dequeued == null) {
            System.err.println("TEST FAILED: loader not deteced weakly reachable");
            dumpThreads();
            throw new RuntimeException("TEST FAILED: loader not detected weakly reachable");
        }
        System.err.println("TEST PASSED: loader detected weakly reachable");
        dumpThreads();
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        throw new RuntimeException("TEST FAILED: unexpected exception", e);
    } finally {
        try {
            UnicastRemoteObject.unexportObject(obj, true);
        } catch (RemoteException e) {
        }
    }
}

Example 89 with WeakReference

use of java.lang.ref.WeakReference in project jdk8u_jdk by JetBrains.

the class PinClientSocketFactory method main.

public static void main(String[] args) throws Exception {
    System.err.println("\nRegression test for bug 4486732\n");
    Factory factoryImpl = new FactoryImpl();
    Factory factoryStub = (Factory) UnicastRemoteObject.exportObject(factoryImpl, 0);
    for (int i = 0; i < SESSIONS; i++) {
        Session session = factoryStub.getSession();
        session.ping();
    }
    UnicastRemoteObject.unexportObject(factoryImpl, true);
    Registry registryImpl = TestLibrary.createRegistryOnEphemeralPort();
    int port = TestLibrary.getRegistryPort(registryImpl);
    System.out.println("Registry listening on port " + port);
    CSF csf = new CSF();
    Reference<CSF> registryRef = new WeakReference<CSF>(csf);
    Registry registryStub = LocateRegistry.getRegistry("", port, csf);
    csf = null;
    registryStub.list();
    registryStub = null;
    UnicastRemoteObject.unexportObject(registryImpl, true);
    System.gc();
    // allow connections to time out
    Thread.sleep(3 * Long.getLong("sun.rmi.transport.connectionTimeout", 15000));
    System.gc();
    if (CSF.deserializedInstances.size() != SESSIONS) {
        throw new Error("unexpected number of deserialized instances: " + CSF.deserializedInstances.size());
    }
    int nonNullCount = 0;
    for (Reference<CSF> ref : CSF.deserializedInstances) {
        csf = ref.get();
        if (csf != null) {
            System.err.println("non-null deserialized instance: " + csf);
            nonNullCount++;
        }
    }
    if (nonNullCount > 0) {
        throw new Error("TEST FAILED: " + nonNullCount + " non-null deserialized instances");
    }
    csf = registryRef.get();
    if (csf != null) {
        System.err.println("non-null registry instance: " + csf);
        throw new Error("TEST FAILED: non-null registry instance");
    }
    System.err.println("TEST PASSED");
}

Example 90 with WeakReference

use of java.lang.ref.WeakReference in project jdk8u_jdk by JetBrains.

the class PinLastArguments method main.

public static void main(String[] args) throws Exception {
    System.err.println("\nRegression test for bug 6332349\n");
    Ping impl = new PingImpl();
    Reference<?> ref = new WeakReference<Ping>(impl);
    try {
        Ping stub = (Ping) UnicastRemoteObject.exportObject(impl, 0);
        Object notSerializable = new Object();
        stub.ping(impl, null);
        try {
            stub.ping(impl, notSerializable);
        } catch (MarshalException e) {
            if (e.getCause() instanceof NotSerializableException) {
                System.err.println("ping invocation failed as expected");
            } else {
                throw e;
            }
        }
    } finally {
        UnicastRemoteObject.unexportObject(impl, true);
    }
    impl = null;
    // expected we will hang here until timed out by the test harness.
    while (true) {
        System.gc();
        Thread.sleep(20);
        if (ref.get() == null) {
            break;
        }
    }
    System.err.println("TEST PASSED");
}