Examples of net.sf.ehcache.Cache

net.sf.ehcache.Cache
Cache is the central class in ehcache. Caches have {@link Element}s and are managed by the {@link CacheManager}. The Cache performs logical actions. It delegates physical implementations to its {@link net.sf.ehcache.store.Store}s.
A reference to a Cache can be obtained through the {@link CacheManager}. A Cache thus obtained is guaranteed to have status {@link Status#STATUS_ALIVE}. This status is checked for any method which throws {@link IllegalStateException} and the same thrown if it is not alive. This would normallyhappen if a call is made after {@link CacheManager#shutdown} is invoked.
Cache is threadsafe.
Statistics on cache usage are collected and made available through the {@link #getStatistics()} methods.
Various decorators are available for Cache, such as BlockingCache, SelfPopulatingCache and the dynamic proxy ExceptionHandlingDynamicCacheProxy. See each class for details. @author Greg Luck @version $Id: Cache.java 793 2008-10-07 07:28:03Z gregluck $


  /**
   * {@inheritDoc}
   */
  public boolean isRegionCacheLoggingEnabled(String region) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      return cache.getCacheConfiguration().getLogging();
    }
    else {
      return false;
    }
  }

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  /**
   * {@inheritDoc}
   */
  public boolean isRegionCacheOrphanEvictionEnabled(String region) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null && cache.isTerracottaClustered() ) {
      return cache.getCacheConfiguration().getTerracottaConfiguration().getOrphanEviction();
    }
    else {
      return false;
    }
  }

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  /**
   * {@inheritDoc}
   */
  public boolean isTerracottaHibernateCache(String region) {
    Cache cache = cacheManager.getCache( region );
    if ( cache != null ) {
      return cache.getCacheConfiguration().isTerracottaClustered();
    }
    else {
      return false;
    }
  }

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  /**
   * {@inheritDoc}
   */
  public void setRegionCacheLoggingEnabled(String region, boolean loggingEnabled) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      cache.getCacheConfiguration().setLogging( loggingEnabled );
      sendNotification( CACHE_REGION_CHANGED, getRegionCacheAttributes( region ), region );
    }
  }

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  /**
   * {@inheritDoc}
   */
  public void setRegionCacheMaxTTISeconds(String region, int maxTTISeconds) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      cache.getCacheConfiguration().setTimeToIdleSeconds( maxTTISeconds );
      sendNotification( CACHE_REGION_CHANGED, getRegionCacheAttributes( region ), region );
    }
  }

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  /**
   * {@inheritDoc}
   */
  public void setRegionCacheMaxTTLSeconds(String region, int maxTTLSeconds) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      cache.getCacheConfiguration().setTimeToLiveSeconds( maxTTLSeconds );
      sendNotification( CACHE_REGION_CHANGED, getRegionCacheAttributes( region ), region );
    }
  }

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  /**
   * {@inheritDoc}
   */
  public void setRegionCacheTargetMaxInMemoryCount(String region, int targetMaxInMemoryCount) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      cache.getCacheConfiguration().setMaxElementsInMemory( targetMaxInMemoryCount );
      sendNotification( CACHE_REGION_CHANGED, getRegionCacheAttributes( region ), region );
    }
  }

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  /**
   * {@inheritDoc}
   */
  public void setRegionCacheTargetMaxTotalCount(String region, int targetMaxTotalCount) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      cache.getCacheConfiguration().setMaxElementsOnDisk( targetMaxTotalCount );
      sendNotification( CACHE_REGION_CHANGED, getRegionCacheAttributes( region ), region );
    }
  }

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   * {@inheritDoc}
   *
   * @see EhcacheStats#getNumberOfElementsInMemory(java.lang.String)
   */
  public int getNumberOfElementsInMemory(String region) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      return (int) cache.getMemoryStoreSize();
    }
    else {
      return -1;
    }
  }

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   * {@inheritDoc}
   *
   * @see EhcacheStats#getNumberOfElementsOffHeap(java.lang.String)
   */
  public int getNumberOfElementsOffHeap(String region) {
    Cache cache = this.cacheManager.getCache( region );
    if ( cache != null ) {
      return (int) cache.getOffHeapStoreSize();
    }
    else {
      return -1;
    }
  }

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