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

Example 31 with SoftReference

use of java.lang.ref.SoftReference in project hackpad by dropbox.

the class PolicySecurityController method callWithDomain.

@Override
public Object callWithDomain(final Object securityDomain, final Context cx, Callable callable, Scriptable scope, Scriptable thisObj, Object[] args) {
    // Run in doPrivileged as we might be checked for "getClassLoader" 
    // runtime permission
    final ClassLoader classLoader = (ClassLoader) AccessController.doPrivileged(new PrivilegedAction<Object>() {

        public Object run() {
            return cx.getApplicationClassLoader();
        }
    });
    final CodeSource codeSource = (CodeSource) securityDomain;
    Map<ClassLoader, SoftReference<SecureCaller>> classLoaderMap;
    synchronized (callers) {
        classLoaderMap = callers.get(codeSource);
        if (classLoaderMap == null) {
            classLoaderMap = new WeakHashMap<ClassLoader, SoftReference<SecureCaller>>();
            callers.put(codeSource, classLoaderMap);
        }
    }
    SecureCaller caller;
    synchronized (classLoaderMap) {
        SoftReference<SecureCaller> ref = classLoaderMap.get(classLoader);
        if (ref != null) {
            caller = ref.get();
        } else {
            caller = null;
        }
        if (caller == null) {
            try {
                // Run in doPrivileged as we'll be checked for 
                // "createClassLoader" runtime permission
                caller = (SecureCaller) AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {

                    public Object run() throws Exception {
                        Loader loader = new Loader(classLoader, codeSource);
                        Class<?> c = loader.defineClass(SecureCaller.class.getName() + "Impl", secureCallerImplBytecode);
                        return c.newInstance();
                    }
                });
                classLoaderMap.put(classLoader, new SoftReference<SecureCaller>(caller));
            } catch (PrivilegedActionException ex) {
                throw new UndeclaredThrowableException(ex.getCause());
            }
        }
    }
    return caller.call(callable, cx, scope, thisObj, args);
}

Example 32 with SoftReference

use of java.lang.ref.SoftReference in project hackpad by dropbox.

the class SecureCaller method callSecurely.

/**
     * Call the specified callable using a protection domain belonging to the 
     * specified code source. 
     */
static Object callSecurely(final CodeSource codeSource, Callable callable, Context cx, Scriptable scope, Scriptable thisObj, Object[] args) {
    final Thread thread = Thread.currentThread();
    // Run in doPrivileged as we might be checked for "getClassLoader" 
    // runtime permission
    final ClassLoader classLoader = (ClassLoader) AccessController.doPrivileged(new PrivilegedAction<Object>() {

        public Object run() {
            return thread.getContextClassLoader();
        }
    });
    Map<ClassLoader, SoftReference<SecureCaller>> classLoaderMap;
    synchronized (callers) {
        classLoaderMap = callers.get(codeSource);
        if (classLoaderMap == null) {
            classLoaderMap = new WeakHashMap<ClassLoader, SoftReference<SecureCaller>>();
            callers.put(codeSource, classLoaderMap);
        }
    }
    SecureCaller caller;
    synchronized (classLoaderMap) {
        SoftReference<SecureCaller> ref = classLoaderMap.get(classLoader);
        if (ref != null) {
            caller = ref.get();
        } else {
            caller = null;
        }
        if (caller == null) {
            try {
                // Run in doPrivileged as we'll be checked for 
                // "createClassLoader" runtime permission
                caller = (SecureCaller) AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {

                    public Object run() throws Exception {
                        ClassLoader effectiveClassLoader;
                        Class<?> thisClass = getClass();
                        if (classLoader.loadClass(thisClass.getName()) != thisClass) {
                            effectiveClassLoader = thisClass.getClassLoader();
                        } else {
                            effectiveClassLoader = classLoader;
                        }
                        SecureClassLoaderImpl secCl = new SecureClassLoaderImpl(effectiveClassLoader);
                        Class<?> c = secCl.defineAndLinkClass(SecureCaller.class.getName() + "Impl", secureCallerImplBytecode, codeSource);
                        return c.newInstance();
                    }
                });
                classLoaderMap.put(classLoader, new SoftReference<SecureCaller>(caller));
            } catch (PrivilegedActionException ex) {
                throw new UndeclaredThrowableException(ex.getCause());
            }
        }
    }
    return caller.call(callable, cx, scope, thisObj, args);
}

Example 33 with SoftReference

use of java.lang.ref.SoftReference in project android-app by eoecn.

the class ImageUtil method loadThumbnailImage.

/**
	 * 从本地或者服务端异步加载缩略图图片
	 * 
	 * @return
	 * @param imagePath
	 *            本地缓存路径
	 * @param imgUrl
	 *            拼接后的请求路径
	 * @param callback
	 *            得到数据后的处理方法回调
	 * @throws IOException
	 */
public static Bitmap loadThumbnailImage(final String imagePath, final String imgUrl, final DBHelper dbHelper, final ImageCallback callback, final boolean b) {
    // 在软链接缓存中，则返回Bitmap对象
    if (imageCache.containsKey(imgUrl)) {
        SoftReference reference = imageCache.get(imgUrl);
        Bitmap bitmap = (Bitmap) reference.get();
        if (bitmap != null) {
            return bitmap;
        }
    }
    // 若软链接缓存没有
    Bitmap bitmap = null;
    // 查询数据库 返回bitmap
    // 从本地加载
    bitmap = getImageFromDB(imagePath, imgUrl, dbHelper);
    if (bitmap != null) {
        return bitmap;
    } else {
        // 从网上加载
        final Handler handler = new Handler() {

            @Override
            public void handleMessage(Message msg) {
                if (msg.obj != null) {
                    Bitmap bitmap = (Bitmap) msg.obj;
                    callback.loadImage(bitmap, imagePath);
                }
            }
        };
        Runnable runnable = new Runnable() {

            @Override
            public void run() {
                try {
                    URL url = new URL(imgUrl);
                    URLConnection conn = url.openConnection();
                    conn.setConnectTimeout(5000);
                    conn.setReadTimeout(5000);
                    conn.connect();
                    InputStream in = conn.getInputStream();
                    BitmapFactory.Options options = new Options();
                    options.inSampleSize = 1;
                    Bitmap bitmap = BitmapFactory.decodeStream(in, new Rect(0, 0, 0, 0), options);
                    imageCache.put(imgUrl, new SoftReference(bitmap));
                    Message msg = handler.obtainMessage();
                    msg.obj = bitmap;
                    handler.sendMessage(msg);
                    if (bitmap != null) {
                        // 保存文件到sd卡
                        saveImage(imagePath, bitmap);
                        // 保存到数据库
                        saveImageByDb(imgUrl, dbHelper);
                    }
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                    Log.e(ImageUtil.class.getName(), "图片url不存在");
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        };
        ThreadPoolManager.getInstance().addTask(runnable);
    }
    return null;
}

Example 34 with SoftReference

use of java.lang.ref.SoftReference in project pinot by linkedin.

the class BitmapInvertedIndexReader method getImmutable.

/**
   * {@inheritDoc}
   * @see InvertedIndexReader#getImmutable(int)
   */
@Override
public ImmutableRoaringBitmap getImmutable(int idx) {
    SoftReference<ImmutableRoaringBitmap>[] bitmapArrayReference = null;
    // Return the bitmap if it's still on heap
    if (bitmaps != null) {
        bitmapArrayReference = bitmaps.get();
        if (bitmapArrayReference != null) {
            SoftReference<ImmutableRoaringBitmap> bitmapReference = bitmapArrayReference[idx];
            if (bitmapReference != null) {
                ImmutableRoaringBitmap value = bitmapReference.get();
                if (value != null) {
                    return value;
                }
            }
        } else {
            bitmapArrayReference = new SoftReference[numberOfBitmaps];
            bitmaps = new SoftReference<SoftReference<ImmutableRoaringBitmap>[]>(bitmapArrayReference);
        }
    } else {
        bitmapArrayReference = new SoftReference[numberOfBitmaps];
        bitmaps = new SoftReference<SoftReference<ImmutableRoaringBitmap>[]>(bitmapArrayReference);
    }
    synchronized (this) {
        ImmutableRoaringBitmap value;
        if (bitmapArrayReference[idx] == null || bitmapArrayReference[idx].get() == null) {
            value = buildRoaringBitmapForIndex(idx);
            bitmapArrayReference[idx] = new SoftReference<ImmutableRoaringBitmap>(value);
        } else {
            value = bitmapArrayReference[idx].get();
        }
        return value;
    }
}

Example 35 with SoftReference

use of java.lang.ref.SoftReference in project StickerCamera by Skykai521.

the class ImageUtils method byteToBitmap.

public static Bitmap byteToBitmap(byte[] imgByte) {
    InputStream input = null;
    Bitmap bitmap = null;
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inSampleSize = 1;
    input = new ByteArrayInputStream(imgByte);
    SoftReference softRef = new SoftReference(BitmapFactory.decodeStream(input, null, options));
    bitmap = (Bitmap) softRef.get();
    if (imgByte != null) {
        imgByte = null;
    }
    try {
        if (input != null) {
            input.close();
        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return bitmap;
}