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

Example 21 with WeakReference

use of java.lang.ref.WeakReference in project jna by java-native-access.

the class MemoryTest method testAvoidGCWithExtantBuffer.

public void testAvoidGCWithExtantBuffer() throws Exception {
    if (!Platform.HAS_BUFFERS)
        return;
    Memory m = new Memory(1024);
    m.clear();
    ByteBuffer b = m.getByteBuffer(0, m.size());
    Reference<Memory> ref = new WeakReference<Memory>(m);
    Reference<ByteBuffer> bref = new WeakReference<ByteBuffer>(b);
    // Create a second byte buffer "equal" to the first
    m = new Memory(1024);
    m.clear();
    m.getByteBuffer(0, m.size());
    m = null;
    System.gc();
    Memory.purge();
    for (int i = 0; i < GC_WAITS && ref.get() != null; i++) {
        Thread.sleep(GC_WAIT_INTERVAL);
        System.gc();
        Memory.purge();
    }
    assertNotNull("Memory GC'd while NIO Buffer still exists", ref.get());
    // Avoid IBM J9 optimization resulting in premature GC of buffer
    b.put((byte) 0);
    b = null;
    System.gc();
    Memory.purge();
    for (int i = 0; i < GC_WAITS && (bref.get() != null || ref.get() != null); i++) {
        Thread.sleep(GC_WAIT_INTERVAL);
        System.gc();
        Memory.purge();
    }
    assertNull("Buffer not GC'd\n", bref.get());
    assertNull("Memory not GC'd after buffer GC'd\n", ref.get());
}

Example 22 with WeakReference

use of java.lang.ref.WeakReference in project jna by java-native-access.

the class CallbacksTest method testStringCallbackMemoryReclamation.

public void testStringCallbackMemoryReclamation() throws InterruptedException {
    TestLibrary.StringCallback cb = new TestLibrary.StringCallback() {

        @Override
        public String callback(String arg, String arg2) {
            return arg + arg2;
        }
    };
    // A little internal groping
    Map<?, ?> m = CallbackReference.allocations;
    m.clear();
    Charset charset = Charset.forName(Native.getDefaultStringEncoding());
    String arg = getName() + "1" + charset.decode(charset.encode(UNICODE));
    String arg2 = getName() + "2" + charset.decode(charset.encode(UNICODE));
    String value = lib.callStringCallback(cb, arg, arg2);
    WeakReference<Object> ref = new WeakReference<Object>(value);
    arg = null;
    value = null;
    System.gc();
    for (int i = 0; i < 100 && (ref.get() != null || m.size() > 0); ++i) {
        try {
            // Give the GC a chance to run
            Thread.sleep(10);
            System.gc();
        } finally {
        }
    }
    assertNull("NativeString reference not GC'd", ref.get());
    assertEquals("NativeString reference still held: " + m.values(), 0, m.size());
}

Example 23 with WeakReference

use of java.lang.ref.WeakReference in project Talon-for-Twitter by klinker24.

the class ImageUtils method imageUrlAsyncTask.

private static void imageUrlAsyncTask(final Context context, final ImageView imageView, final BitmapLruCache mCache, final boolean profile, final String url) {
    final WeakReference<ImageView> mImageViewRef = new WeakReference<ImageView>(imageView);
    Thread imageDownload = new Thread(new Runnable() {

        @Override
        public void run() {
            try {
                // Return early if the ImageView has disappeared.
                if (null == mImageViewRef.get()) {
                    return;
                }
                // Now we're not on the main thread we can check all caches
                CacheableBitmapDrawable result;
                result = mCache.get(url, null);
                if (null == result || profile) {
                    String mUrl = url;
                    if (url.contains("twitpic")) {
                        try {
                            URL address = new URL(url);
                            HttpURLConnection connection = (HttpURLConnection) address.openConnection(Proxy.NO_PROXY);
                            connection.setConnectTimeout(1000);
                            connection.setInstanceFollowRedirects(false);
                            connection.setReadTimeout(1000);
                            connection.connect();
                            String expandedURL = connection.getHeaderField("Location");
                            if (expandedURL != null) {
                                mUrl = expandedURL;
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                    // The bitmap isn't cached so download from the web
                    HttpURLConnection conn = (HttpURLConnection) new URL(mUrl).openConnection();
                    InputStream is = new BufferedInputStream(conn.getInputStream());
                    Bitmap b = decodeSampledBitmapFromResourceMemOpt(is, 500, 500);
                    try {
                        is.close();
                    } catch (Exception e) {
                    }
                    try {
                        conn.disconnect();
                    } catch (Exception e) {
                    }
                    // Add to cache
                    try {
                        result = mCache.put(mUrl, b);
                    } catch (Exception e) {
                        result = null;
                    }
                }
                final CacheableBitmapDrawable fResult = result;
                ((Activity) context).runOnUiThread(new Runnable() {

                    @Override
                    public void run() {
                        try {
                            final ImageView iv = mImageViewRef.get();
                            if (null != iv && iv.getVisibility() != View.GONE) {
                                iv.setImageDrawable(fResult);
                                Animation fadeInAnimation = AnimationUtils.loadAnimation(context, R.anim.fade_in);
                                iv.startAnimation(fadeInAnimation);
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                });
            } catch (IOException e) {
                Log.e("ImageUrlAsyncTask", e.toString());
            } catch (OutOfMemoryError e) {
                Log.v("ImageUrlAsyncTask", "Out of memory error here");
            } catch (Exception e) {
                // something else
                e.printStackTrace();
            }
        }
    });
    imageDownload.setPriority(8);
    imageDownload.start();
}

Example 24 with WeakReference

use of java.lang.ref.WeakReference in project Klyph by jonathangerbaud.

the class FriendRequestService method onCreate.

@Override
public void onCreate() {
    HandlerThread thread = new HandlerThread("ServiceStartArguments", android.os.Process.THREAD_PRIORITY_BACKGROUND);
    thread.start();
    mServiceLooper = thread.getLooper();
    mServiceHandler = new ServiceHandler(mServiceLooper, new WeakReference<Service>(this));
}

Example 25 with WeakReference

use of java.lang.ref.WeakReference in project Klyph by jonathangerbaud.

the class NotificationService method onCreate.

@Override
public void onCreate() {
    // Why initialize device values ?
    // Because we need the density to calculate image size
    // In notification request
    KlyphDevice.initDeviceValues(this);
    HandlerThread thread = new HandlerThread("ServiceStartArguments", android.os.Process.THREAD_PRIORITY_BACKGROUND);
    thread.start();
    mServiceLooper = thread.getLooper();
    mServiceHandler = new ServiceHandler(mServiceLooper, new WeakReference<Service>(this));
}