Example usage for java.lang.ref SoftReference SoftReference

Introduction

In this page you can find the example usage for java.lang.ref SoftReference SoftReference.

Prototype

public SoftReference(T referent) 

Source Link

Document

Creates a new soft reference that refers to the given object.

Usage

From source file:de.dal33t.powerfolder.util.ByteSerializer.java

/**
 * Serialize an object. This method is non-static an re-uses the internal
 * byteoutputstream/*  ww w. j a va 2  s.c  o m*/
 *
 * @param target
 *            The object to be serialized
 * @param compress
 *            true if serialization should compress.
 * @param padToSize
 *            the size to pad the output buffer to. number below 0 means no
 *            padding.
 * @return The serialized object
 * @throws IOException
 *             In case the object cannot be serialized
 */
public byte[] serialize(Serializable target, boolean compress, int padToSize) throws IOException {
    long start = System.currentTimeMillis();
    ByteArrayOutputStream byteOut;
    // Reset buffer
    if (outBufferRef != null && outBufferRef.get() != null) {
        // Reuse old buffer
        byteOut = outBufferRef.get();
        byteOut.reset();
    } else {
        // logFiner("Creating send buffer (512bytes)");
        // Create new bytearray output, 512b buffer
        byteOut = new ByteArrayOutputStream(512);
        if (CACHE_OUT_BUFFER) {
            // Chache outgoing buffer
            outBufferRef = new SoftReference<ByteArrayOutputStream>(byteOut);
        }
    }

    OutputStream targetOut;
    // Serialize....
    if (compress) {
        PFZIPOutputStream zipOut = new PFZIPOutputStream(byteOut);
        targetOut = zipOut;
    } else {
        targetOut = byteOut;
    }
    ObjectOutputStream objOut = new ObjectOutputStream(targetOut);

    // Write
    try {
        objOut.writeUnshared(target);
    } catch (StreamCorruptedException e) {
        LOG.log(Level.WARNING, "Problem while serializing: " + e, e);
        throw e;
    } catch (InvalidClassException e) {
        LOG.log(Level.WARNING, "Problem while serializing: " + target + ": " + e, e);
        throw e;
    }

    objOut.close();

    if (padToSize > 0) {
        int modulo = byteOut.size() % padToSize;
        if (modulo != 0) {
            int additionalBytesRequired = padToSize - (modulo);
            // LOG.warn("Buffersize: " + byteOut.size()
            // + ", Additonal bytes required: " + additionalBytesRequired);
            for (int i = 0; i < additionalBytesRequired; i++) {
                byteOut.write(0);
            }
        }
    }
    byteOut.flush();
    byteOut.close();

    if (byteOut.size() >= 256 * 1024) {
        logWarning("Send buffer exceeds 256KB! " + Format.formatBytes(byteOut.size()) + ". Message: " + target);
    }

    byte[] buf = byteOut.toByteArray();
    if (BENCHMARK) {
        totalObjects++;
        totalTime += System.currentTimeMillis() - start;
        int count = 0;
        if (CLASS_STATS.containsKey(target.getClass())) {
            count = CLASS_STATS.get(target.getClass());
        }
        count++;
        CLASS_STATS.put(target.getClass(), count);
    }
    return buf;
}

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From source file:org.jactr.eclipse.runtime.debug.elements.ASTVariable.java

public IVariable[] getVariables() throws DebugException {
    IVariable[] children = _children.get();
    if (children == null) {
        ArrayList<IVariable> variables = new ArrayList<IVariable>();
        for (CommonTree child : Support.getVisibleChildren(_ast))
            variables.add(new ASTVariable(child, _target));

        children = variables.toArray(new IVariable[variables.size()]);
        _children = new SoftReference<IVariable[]>(children);
    }/*w w w  .j  a  va 2  s .  c  o m*/

    return children;
}

---

From source file:org.jactr.core.utils.collections.CachedCollection.java

synchronized public Collection<I> getCachedValues() {
    Collection<I> rtn = null;
    if (_cachedCollectionReference == null || (rtn = _cachedCollectionReference.get()) == null) {
        rtn = Collections.unmodifiableCollection(new FastList<I>(_backingCollection));
        _cachedCollectionReference = new SoftReference<Collection<I>>(rtn);
    }/*w  w w.  j a va 2 s .  c  o m*/
    return rtn;
}

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From source file:cn.dreamtobe.touchgallery.BaseGalleryPagerAdapter.java

@Override
public Bitmap loadCache(final String key) {
    Bitmap bm = null;/* w  w w . ja v a  2  s. c om*/
    if (mMapCache != null) {
        bm = mMapCache.get(key);
    }

    if (bm != null) {
        if (!bm.isRecycled()) {
            return bm;
        } else {
            mMapCache.remove(key);
        }
    }

    if (mLruCache != null) {
        Object o = mLruCache.get(key);
        if (o != null && o instanceof Bitmap) {
            bm = (Bitmap) o;
            mLruCache.remove(key);
            if (!bm.isRecycled()) {
                mLruCache.put(key, bm);
                return bm;
            }
        }
    }

    if (mLruSoftCache != null && mLruSoftCache.get(key) != null) {
        Object o = mLruSoftCache.get(key).get();
        if (o != null && o instanceof Bitmap) {
            bm = (Bitmap) o;
            mLruSoftCache.remove(key);
            if (!bm.isRecycled()) {
                mLruSoftCache.put(key, new SoftReference<Object>(bm));
                return bm;
            }
        }
    }

    return null;
}

---

From source file:com.cm.beer.util.ContentManager.java

/**
 * //from   ww w . j a v  a2 s  . co m
 * @param urlString
 * @return
 */
public String fetchContent(String urlString) {
    if (mContentCache.containsKey(urlString)) {
        if (Logger.isLogEnabled())
            Logger.log("Returning Content from Cache:" + urlString);
        SoftReference<String> softReference = mContentCache.get(urlString);
        if ((softReference == null) || (softReference.get() == null)) {
            mContentCache.remove(urlString);
            if (Logger.isLogEnabled())
                Logger.log("fetchContent():Soft Reference has been Garbage Collected:" + urlString);
        } else {
            return softReference.get();
        }
    }

    if (Logger.isLogEnabled())
        Logger.log("url:" + urlString);
    try {
        // prevents multithreaded fetches for the same url
        mLockCache.put(urlString, urlString);
        if (Logger.isLogEnabled())
            Logger.log("Begin Downloading:" + urlString);
        InputStream is = fetch(urlString);
        if (Logger.isLogEnabled())
            Logger.log("End Downloading:" + urlString);

        String result = Util.convertStreamToString(is, "UTF-8");

        mContentCache.put(urlString, new SoftReference<String>(result));
        mLockCache.remove(urlString);

        if (Logger.isLogEnabled())
            Logger.log(result);

        return result;
    } catch (Throwable e) {
        Log.e(this.getClass().getName(), "fetchDrawable failed", e);
        return null;
    }
}

---

From source file:pl.otros.logview.api.gui.LogViewPanelWrapper.java

public LogViewPanelWrapper(final String name, final Stoppable stoppable, final TableColumns[] visibleColumns,
        final LogDataTableModel logDataTableModel, final DataConfiguration configuration,
        final OtrosApplication otrosApplication) {

    this.name = name;
    this.configuration = configuration;
    this.otrosApplication = otrosApplication;
    logLoader = otrosApplication.getLogLoader();
    this.addHierarchyListener(e -> {
        if (e.getChangeFlags() == 1 && e.getChanged().getParent() == null) {
            closing();/*  www . j ava 2  s.  co m*/
        }
    });
    final TableColumns[] columns = (visibleColumns == null) ? TableColumns.ALL_WITHOUT_LOG_SOURCE
            : visibleColumns;

    fillDefaultConfiguration();

    SoftReference<Stoppable> stoppableReference = new SoftReference<>(stoppable);
    // this.statusObserver = statusObserver;
    dataTableModel = logDataTableModel == null ? new LogDataTableModel() : logDataTableModel;
    logViewPanel = new LogViewPanel(dataTableModel, columns, otrosApplication);

    cardLayout = new CardLayout();
    GridBagConstraints c = new GridBagConstraints();
    c.insets = new Insets(10, 10, 10, 10);
    c.anchor = GridBagConstraints.PAGE_START;
    c.fill = GridBagConstraints.HORIZONTAL;
    c.gridx = 0;
    c.gridy = 0;
    c.ipadx = 1;
    c.ipady = 1;
    c.weightx = 10;
    c.weighty = 1;

    c.gridy++;
    c.weighty = 3;
    loadingProgressBar = new JProgressBar();
    loadingProgressBar.setIndeterminate(false);
    loadingProgressBar.setStringPainted(true);
    loadingProgressBar.setString("Connecting...");

    c.gridy++;
    c.weighty = 1;
    c.weightx = 2;
    c.gridy++;
    c.weightx = 1;
    JButton stopButton = new JButton("Stop, you have imported already enough!");
    stopButton.addActionListener(e -> {
        Stoppable stoppable1 = stoppableReference.get();
        if (stoppable1 != null) {
            stoppable1.stop();
        }
    });

    setLayout(cardLayout);
    add(logViewPanel, CARD_LAYOUT_CONTENT);
    cardLayout.show(this, CARD_LAYOUT_LOADING);

}

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From source file:com.cm.beer.util.DrawableManager.java

/**
 * //from   w  w  w . ja  v  a2s .  c  o m
 * @param urlString
 * @return
 */
public Drawable fetchDrawable(String urlString) {
    if (mDrawableCache.containsKey(urlString)) {
        if (Logger.isLogEnabled())
            Logger.log("Returning Drawable from Cache:" + urlString);
        SoftReference<Drawable> softReference = mDrawableCache.get(urlString);
        if ((softReference == null) || (softReference.get() == null)) {
            mDrawableCache.remove(urlString);
            if (Logger.isLogEnabled())
                Logger.log("fetchDrawable():Soft Reference has been Garbage Collected:" + urlString);
        } else {
            return softReference.get();
        }
    }

    if (Logger.isLogEnabled())
        Logger.log("image url:" + urlString);
    try {
        // prevents multithreaded fetches for the same image
        mLockCache.put(urlString, urlString);
        if (Logger.isLogEnabled())
            Logger.log("Begin Downloading:" + urlString);
        InputStream is = fetch(urlString);
        if (Logger.isLogEnabled())
            Logger.log("End Downloading:" + urlString);
        Drawable drawable = Drawable.createFromStream(is, "src");
        mDrawableCache.put(urlString, new SoftReference<Drawable>(drawable));
        mLockCache.remove(urlString);
        if (Logger.isLogEnabled())
            Logger.log("got a thumbnail drawable: " + drawable.getBounds() + ", "
                    + drawable.getIntrinsicHeight() + "," + drawable.getIntrinsicWidth() + ", "
                    + drawable.getMinimumHeight() + "," + drawable.getMinimumWidth());
        return drawable;
    } catch (Throwable e) {
        Log.e(this.getClass().getName(), "fetchDrawable failed", e);
        return null;
    }
}

---

From source file:com.hunch.ImageManager.java

protected void addToMemoryCache(Bitmap d, URL url) {
    //Log.v( Const.TAG, "adding bitmap to memory cache (" + url +  ")" );
    // add by soft reference to the level one cache (in memory)
    drawableMap.put(url, new SoftReference<Bitmap>(d));
}

---

From source file:org.jinzora.util.DrawableManager.java

public Drawable fetchDrawable(String urlString) {
    if (drawableMap.containsKey(urlString)) {
        SoftReference<Drawable> reference = drawableMap.get(urlString);
        Drawable drawable = reference.get();
        if (drawable != null) {
            if (DBG)
                Log.d(TAG, "Using cached image");
            return drawable;
        } else {/*from ww  w  .j av a  2 s.c  om*/
            if (DBG)
                Log.d(TAG, "Soft reference cleared.");
            drawableMap.remove(urlString);
        }
    }

    if (DBG)
        Log.d(TAG, "Fetching image");
    try {
        InputStream is = fetch(urlString);
        Drawable drawable = Drawable.createFromStream(is, "src");

        if (drawable != null) {
            drawableMap.put(urlString, new SoftReference<Drawable>(drawable));
        } else {
            Log.w(this.getClass().getSimpleName(), "could not get thumbnail for " + urlString);
        }

        return drawable;
    } catch (MalformedURLException e) {
        Log.e(this.getClass().getSimpleName(), "fetchDrawable failed", e);
        return null;
    } catch (IOException e) {
        Log.e(this.getClass().getSimpleName(), "fetchDrawable failed", e);
        return null;
    }
}

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From source file:org.codehaus.groovy.grails.commons.metaclass.WeakGenericDynamicProperty.java

public void set(Object object, Object newValue) {
    if (!readyOnly) {
        if (this.type.isInstance(newValue))
            propertyToInstanceMap.put(String.valueOf(System.identityHashCode(object)) + getPropertyName(),
                    new SoftReference<Object>(newValue));
        else if (newValue != null)
            throw new MissingPropertyException(
                    "Property '" + this.getPropertyName() + "' for object '" + object.getClass()
                            + "' cannot be set with value '" + newValue + "'. Incorrect type.",
                    object.getClass());/*from   ww w .  j  a  va2 s. c  o  m*/
    } else {
        throw new MissingPropertyException("Property '" + this.getPropertyName() + "' for object '"
                + object.getClass() + "' is read-only!", object.getClass());
    }
}

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