cvs commit: jakarta-turbine-jcs/sandbox/yajcache/src/org/apache/jcs/yajcache/file CacheFileManager.java

[hc...@apache.org]

hchar       2005/01/27 03:01:16

  Added:       sandbox/yajcache/src/org/apache/jcs/yajcache/file
                        CacheFileManager.java
  Log:
  implement cache change listener and handler
  
  Revision  Changes    Path
  1.1                  jakarta-turbine-jcs/sandbox/yajcache/src/org/apache/jcs/yajcache/file/CacheFileManager.java
  
  Index: CacheFileManager.java
  ===================================================================
  /*
   * Copyright 2001-2004 The Apache Software Foundation.
   *
   * 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 org.apache.jcs.yajcache.file;
  
  import java.io.Serializable;
  import org.apache.commons.lang.SerializationUtils;
  import org.apache.jcs.yajcache.core.ICacheChangeListener;
  import org.apache.jcs.yajcache.event.CacheChangeEvent;
  
  import org.apache.jcs.yajcache.lang.annotation.*;
  import org.apache.jcs.yajcache.core.ICache;
  import org.apache.jcs.yajcache.core.ICacheChangeHandler;
  /**
   *
   * Handle cache change events by persisting to or removing from the file system.
   * @author Hanson Char
   */
  @CopyRightApache
  public class CacheFileManager<V> 
          implements ICacheChangeListener<V>, ICacheChangeHandler<V>
  {
      private ICache<V> cache;
      
      public CacheFileManager(ICache<V> cache) {
          this.cache = cache;
          // Creates the file directory for the cache
          CacheFileUtils.inst.mkCacheDirs(cache.getName());
      }
      @Implements(ICacheChangeListener.class)
      public void cacheChange(@NonNullable CacheChangeEvent<V> event) {
          event.dispatch(this);
      }
      
      @Implements(ICacheChangeHandler.class)
      public boolean handlePut(@NonNullable String cacheName, 
              @NonNullable String key, @NonNullable V value) 
      {
          if (value instanceof Serializable) {
              byte[] ba = SerializationUtils.serialize((Serializable)value);
              CacheFileDAO.inst.writeCacheItem(
                  cacheName, CacheFileContentType.JAVA_SERIALIZATION, key, ba);
              return true;
          }
          return false;
      }
      @Implements(ICacheChangeHandler.class)
      public boolean handleRemove(
              @NonNullable String cacheName, @NonNullable String key) 
      {
          return CacheFileDAO.inst.removeCacheItem(cacheName, key);
      }
      @Implements(ICacheChangeHandler.class)
      public boolean handleClear(@NonNullable String cacheName) {
          return CacheFileUtils.inst.rmCacheDir(cacheName);
      }
      
      @TODO("Avoid multiple serialization for the same put")
      @Implements(ICacheChangeHandler.class)
      public boolean handlePutCopy(@NonNullable String cacheName, 
              @NonNullable String key, @NonNullable V value) 
      {
          return false;
      }
      @TODO("Avoid multiple serialization for the same put")
      @Implements(ICacheChangeHandler.class)
      public boolean handlePutBeanCopy(@NonNullable String cacheName, 
              @NonNullable String key, @NonNullable V value) 
      {
          return false;
      }
      @TODO("Avoid multiple serialization for the same put")
      @Implements(ICacheChangeHandler.class)
      public boolean handlePutBeanClone(@NonNullable String cacheName, 
              @NonNullable String key, @NonNullable V value) 
      {
          return false;
      }
  }
  
  
  

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