Android Open Source - lightbox-android-webservices Abstract Cache

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License

The source code is released under:

Apache License

Java Source Code

/**
 * Copyright (c) 2012 Lightbox//from w w w .j  ava  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.cache;

import java.util.concurrent.ConcurrentMap;

import com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap;
import com.googlecode.concurrentlinkedhashmap.ConcurrentLinkedHashMap.Builder;

/** 
 * AbstractCache 
 * @author Fabien Devos
 */
public abstract class AbstractCache<TMem, TDisk> implements Cache<TMem, TDisk> {
  /** Used to tag logs */
  @SuppressWarnings("unused")
  private static final String TAG = "AbstractCache";
  
  private ConcurrentMap<String, TMem> mMemoryCache;
  private Config<TMem> mConfig;
  
  /**
   * Constructor.
   */
  public AbstractCache(Config<TMem> config) {
    mConfig = config;
    resetMemoryCache(mConfig.getMaximumWeightedCapacity());
  }
  
  protected void resetMemoryCache(int maximumWeightedCapacity) {
    Builder<String, TMem> builder = new ConcurrentLinkedHashMap.Builder<String, TMem>()
      .maximumWeightedCapacity(maximumWeightedCapacity);
    if (mConfig.getWeigher() != null) {
      builder.weigher(mConfig.getWeigher());
    }
    mMemoryCache = builder.build();
  }
  
  @Override
  public void clear() {
    clearMemory();
    clearDisk();
  }
  
  @Override
  public void clearMemory() {
    mMemoryCache.clear();
  }
    
  @Override
  public TMem getFromMemory(String key) {
    if (key == null) { return null; }
    return mMemoryCache.get(key);
  }
  
  @Override
  public void putInMemory(String key, TMem data) {
    if (data != null && key != null) {
      mMemoryCache.put(key, data);
    }
  }

  public void removeFromMemory(String key) {
    mMemoryCache.remove(key);
  }
}

Java Source Code List

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