ehcache.xml

<ehcache>
  
  <!-- If the name is empty, CPK engine uses the id of the plugin to set the name of the cache -->
  <cache 
      name=""
      maxEntriesLocalHeap="100"
      maxEntriesLocalDisk="10000"
      eternal="false"
      overflowToDisk="true"
      timeToLiveSeconds="0"
      timeToIdleSeconds="0"
      diskPersistent="false"
      diskExpiryThreadIntervalSeconds="360"
      memoryStoreEvictionPolicy="LFU"
      diskSpoolBufferSizeMB="50">
  </cache>

</ehcache>

  <!--
  Cache configuration
  ===================

  The following attributes are required.

  name:
  Sets the name of the cache. This is used to identify the cache. It must be unique.

  maxEntriesLocalHeap:
  Sets the maximum number of objects that will be created in memory.  0 == no limit.

  maxEntriesLocalDisk:
  Sets the maximum number of objects that will be maintained in the DiskStore
  The default value is zero, meaning unlimited.

  eternal:
  Sets whether elements are eternal. If eternal,  timeouts are ignored and the
  element is never expired.

  overflowToDisk:
  Sets whether elements can overflow to disk when the memory store
  has reached the maxInMemory limit.

  The following attributes and elements are optional.

  timeToIdleSeconds:
  Sets the time to idle for an element before it expires.
  i.e. The maximum amount of time between accesses before an element expires
  Is only used if the element is not eternal.
  Optional attribute. A value of 0 means that an Element can idle for infinity.
  The default value is 0.

  timeToLiveSeconds:
  Sets the time to live for an element before it expires.
  i.e. The maximum time between creation time and when an element expires.
  Is only used if the element is not eternal.
  Optional attribute. A value of 0 means that and Element can live for infinity.
  The default value is 0.

  diskPersistent:
  Whether the disk store persists between restarts of the Virtual Machine.
  The default value is false.

  diskExpiryThreadIntervalSeconds:
  The number of seconds between runs of the disk expiry thread. The default value
  is 120 seconds.

  diskSpoolBufferSizeMB:
  This is the size to allocate the DiskStore for a spool buffer. Writes are made
  to this area and then asynchronously written to disk. The default size is 30MB.
  Each spool buffer is used only by its cache. If you get OutOfMemory errors consider
  lowering this value. To improve DiskStore performance consider increasing it. Trace level
  logging in the DiskStore will show if put back ups are occurring.

  clearOnFlush:
  whether the MemoryStore should be cleared when flush() is called on the cache.
  By default, this is true i.e. the MemoryStore is cleared.

  statistics:
  Whether to collect statistics. Ehcache runs twice as slow with statistics turned on.
  By default they are off. To enable set statistics="true"

  memoryStoreEvictionPolicy:
  Policy would be enforced upon reaching the maxElementsInMemory limit. Default
  policy is Least Recently Used (specified as LRU). Other policies available -
  First In First Out (specified as FIFO) and Less Frequently Used
  (specified as LFU)

  copyOnRead:
  Whether an Element is copied when being added to the cache.
  By default this is false.

  copyOnWrite:
  Whether an Element is copied when being read from a cache.
  By default this is false.

  Cache elements can also contain sub elements which take the same format of a factory class
  and properties. Defined sub-elements are:

  * cacheEventListenerFactory - Enables registration of listeners for cache events, such as
    put, remove, update, and expire.

  * bootstrapCacheLoaderFactory - Specifies a BootstrapCacheLoader, which is called by a
    cache on initialisation to prepopulate itself.

  * cacheExtensionFactory - Specifies a CacheExtension, a generic mechanism to tie a class
    which holds a reference to a cache to the cache lifecycle.

  * cacheExceptionHandlerFactory - Specifies a CacheExceptionHandler, which is called when
    cache exceptions occur.

  * cacheLoaderFactory - Specifies a CacheLoader, which can be used both asynchronously and
    synchronously to load objects into a cache. More than one cacheLoaderFactory element
    can be added, in which case the loaders form a chain which are executed in order. If a
    loader returns null, the next in chain is called.

  * copyStrategy - Specifies a fully qualified class which implements
    net.sf.ehcache.store.compound.CopyStrategy. This strategy will be used for copyOnRead
    and copyOnWrite in place of the default which is serialization.
    -->