Android Open Source - lightbox-android-webservices Bitmap Loader Task






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Back to project page lightbox-android-webservices.

License

The source code is released under:

Apache License

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Java Source Code

/**
 * Copyright (c) 2012 Lightbox//from ww  w. j  a v  a  2  s  . c  o m
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.lightbox.android.bitmap;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;

import com.lightbox.android.bitmap.BitmapLoader.Volatility;
import com.lightbox.android.cache.BitmapCache;
import com.lightbox.android.tasks.BackgroundTaskWeak;
import com.lightbox.android.utils.debug.DebugLog;

/** 
 * BitmapLoaderTask 
 * @author Fabien Devos & Nilesh Patel
 */
/*package*/ class BitmapLoaderTask extends BackgroundTaskWeak<BitmapLoaderListener, Bitmap> {
  /** Used to tag logs */
  //@SuppressWarnings("unused")
  private static final String TAG = "BitmapLoaderTask";
  
  private static final int DEFAULT_CORE_POOL_SIZE = 6; //Maximum number of Threads running in parallel
    private static final int MAXIMUM_POOL_SIZE = Integer.MAX_VALUE; // Will be ignored as long as the queue is unbounded
    private static final int KEEP_ALIVE = 10000; //(in milliseconds)
    
    private static ExecutorService sSingleThreadExecutor;
  private static ExecutorService sBitmapExecutor;

  private BitmapSource mBitmapSource;
  private BitmapSource.Type mType;
  private Config mConfig;
  private Volatility mVolatility;
  
  //----------------------------------------------
  // Constructors
  
  /**
   * Constructor.
   * @param listener
   */
  public BitmapLoaderTask(BitmapSource bitmapSource, BitmapSource.Type type, Config config, Volatility volatility, BitmapLoaderListener listener) {
    super(listener, getBitmapExecutor(bitmapSource, type));
    mBitmapSource = bitmapSource;
    mType = type;
    mConfig = config;
    mVolatility = volatility;
  }
  
  private static ExecutorService getBitmapExecutor(BitmapSource bitmapSource, BitmapSource.Type type) {
    // If the file exist on disk, use a single thread executor 
    if (BitmapCache.getInstance().existOnDisk(bitmapSource.getAbsoluteFileName(type))) {
      if (sSingleThreadExecutor == null) {
        sSingleThreadExecutor = Executors.newSingleThreadExecutor(
            new BitmapLoaderThreadFactory("single thread"));
      }
      return sSingleThreadExecutor;
    } else {
      // Else use a thread pool executor
      if (sBitmapExecutor == null) {
        sBitmapExecutor = new ThreadPoolExecutor(
            DEFAULT_CORE_POOL_SIZE,
            MAXIMUM_POOL_SIZE,
            KEEP_ALIVE, TimeUnit.MILLISECONDS,
            new LinkedBlockingQueue<Runnable>(), 
            new BitmapLoaderThreadFactory("multiple threads"));
      }
      return sBitmapExecutor;
    }
  }
  
  //----------------------------------------------
  // BackgroundTask implementation

  @Override
  protected Bitmap doWorkInBackground() throws Exception {
    DebugLog.d(TAG, "Start loading bitmap: "+mBitmapSource.getUri(mType));
    return BitmapLoader.loadFromDiskOrNetwork(mBitmapSource, mType, mConfig, mVolatility);
  }

  @Override
  protected void onCompleted(Bitmap bitmap) {    
    BitmapLoaderListener listener = getRef();
    if (listener != null) {
      if (bitmap == null) {
        listener.onFailure(new NullPointerException("bitmap is null"));
      } else {
        listener.onLoaded(bitmap, mType, false);
      }
    }
  }

  @Override
  protected void onFailed(Exception exception) {
    BitmapLoaderListener listener = getRef();
    if (listener != null) {
      listener.onFailure(exception);
    }
  }

  /************************************************
   * BitmapLoaderThreadFactory 
   */
  private static class BitmapLoaderThreadFactory implements ThreadFactory {
    private String mType;
    /** Constructor.*/
    public BitmapLoaderThreadFactory(String type) {
      mType = type;
    }
    // -------------------------
    @Override
    public Thread newThread(Runnable r) {
      Thread thread = new Thread(r);
      thread.setName(TAG + " thread | " + mType);
      thread.setPriority(Thread.NORM_PRIORITY);
      return thread;
    }
  }

}




Java Source Code List

com.lightbox.android.bitmap.BitmapFileCleanerTask.java
com.lightbox.android.bitmap.BitmapLoaderListener.java
com.lightbox.android.bitmap.BitmapLoaderTask.java
com.lightbox.android.bitmap.BitmapLoader.java
com.lightbox.android.bitmap.BitmapSize.java
com.lightbox.android.bitmap.BitmapSource.java
com.lightbox.android.bitmap.BitmapUtils.java
com.lightbox.android.cache.AbstractCache.java
com.lightbox.android.cache.ApiCache.java
com.lightbox.android.cache.BitmapCache.java
com.lightbox.android.cache.Cache.java
com.lightbox.android.data.ClearAndSaveBatchTask.java
com.lightbox.android.data.Data.java
com.lightbox.android.data.DatabaseCleanerTask.java
com.lightbox.android.data.DatabaseHelper.java
com.lightbox.android.data.DeleteBatchTask.java
com.lightbox.android.data.SaveBatchTask.java
com.lightbox.android.io.RandomAccessFileOutputStream.java
com.lightbox.android.lifecycle.LifeCycleListener.java
com.lightbox.android.lifecycle.ManagedLifeCycleActivity.java
com.lightbox.android.location.LocationHelper.java
com.lightbox.android.location.LocationListener.java
com.lightbox.android.network.HttpHelper.java
com.lightbox.android.network.NetworkUtils.java
com.lightbox.android.operations.AbstractOperation.java
com.lightbox.android.operations.CachedOperation.java
com.lightbox.android.operations.DeleteOperation.java
com.lightbox.android.operations.FailureOperation.java
com.lightbox.android.operations.ModificationNetworkOnlyOperation.java
com.lightbox.android.operations.NetworkOnlyOperation.java
com.lightbox.android.operations.OperationListener.java
com.lightbox.android.operations.OperationTask.java
com.lightbox.android.operations.Operation.java
com.lightbox.android.operations.Retrievable.java
com.lightbox.android.operations.RetrieveOperation.java
com.lightbox.android.operations.SaveOperation.java
com.lightbox.android.operations.Updatable.java
com.lightbox.android.tasks.BackgroundTaskWeak.java
com.lightbox.android.tasks.BackgroundTask.java
com.lightbox.android.tasks.DefaultExecutor.java
com.lightbox.android.utils.AndroidUtils.java
com.lightbox.android.utils.Base64.java
com.lightbox.android.utils.IntentUtils.java
com.lightbox.android.utils.MediaUtils.java
com.lightbox.android.utils.ResUtils.java
com.lightbox.android.utils.debug.DebugLifeCycleListener.java
com.lightbox.android.utils.debug.DebugLog.java
com.lightbox.android.views.RemoteImageView.java
com.lightbox.android.views.RemoteThumbImageView.java
com.lightbox.android.webservices.processors.GenerationException.java
com.lightbox.android.webservices.processors.JacksonProcessor.java
com.lightbox.android.webservices.processors.ParsingException.java
com.lightbox.android.webservices.processors.Processor.java
com.lightbox.android.webservices.requests.ApiRequestFactory.java
com.lightbox.android.webservices.requests.ApiRequestListener.java
com.lightbox.android.webservices.requests.ApiRequestTask.java
com.lightbox.android.webservices.requests.ApiRequest.java
com.lightbox.android.webservices.requests.ApiRequests.java
com.lightbox.android.webservices.requests.JacksonApiRequestFactory.java
com.lightbox.android.webservices.responses.ApiException.java
com.lightbox.android.webservices.responses.ApiResponse.java
com.lightbox.tweetsnearby.TweetsNearbyApplication.java
com.lightbox.tweetsnearby.activities.MainActivity.java
com.lightbox.tweetsnearby.activities.PickPlaceActivity.java
com.lightbox.tweetsnearby.model.Tweet.java
com.lightbox.tweetsnearby.model.Venue.java
com.lightbox.tweetsnearby.responses.foursquare.FoursquareApiResponse.java
com.lightbox.tweetsnearby.responses.foursquare.VenueListResponse.java
com.lightbox.tweetsnearby.responses.twitter.TweetListResponse.java
com.lightbox.tweetsnearby.responses.twitter.TwitterApiResponse.java