昨天答应为openfans在原来的ehcache的基础上增加对象cache。我参考着尝试增加配置如下。由于以前没有用过ehcache，虽然现在没提示没有配置cache对象，但到现在我也对它的原理，配置结构还是一窍不通。如果有哪位知道欢迎交流并对下面的配置进行批评指正。
<ehcache>
<!-- Sets the path to the directory where cache .data files are created.
If the path is a Java System Property it is replaced by
its value in the running VM.
The following properties are translated:
user.home - User's home directory
user.dir - User's current working directory
java.io.tmpdir - Default temp file path -->
<diskStore path="java.io.tmpdir" />
<!--Default Cache configuration. These will applied to caches programmatically created through
the CacheManager.
The following attributes are required:
maxElementsInMemory - Sets the maximum number of objects that will be created in memory
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 in-memory cache
has reached the maxInMemory limit.
The following attributes 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.
-->
<!-- Queries cache -->
<cache name="org.hibernate.cache.StandardQueryCache"
maxElementsInMemory="1000" eternal="false" timeToLiveSeconds="120"
overflowToDisk="true" />
<cache name="org.hibernate.cache.UpdateTimestampsCache"
maxElementsInMemory="5000" eternal="true" overflowToDisk="true" />
<!-- Object cache -->
<cache name="org.openfans.domain.Article"
maxElementsInMemory="50000" eternal="false" overflowToDisk="true"
timeToIdleSeconds="300" />
<cache name="org.openfans.domain.Auth" maxElementsInMemory="5000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="600" />
<cache name="org.openfans.domain.Fans" maxElementsInMemory="10000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="300" />
<cache name="org.openfans.domain.FansVisitTag" maxElementsInMemory="10000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="300" />
<cache name="org.openfans.domain.Group" maxElementsInMemory="10000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="600" />
<cache name="org.openfans.domain.Link" maxElementsInMemory="20000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="300" />
<cache name="org.openfans.domain.RootTag" maxElementsInMemory="20000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="300" />
<cache name="org.openfans.domain.Tag" maxElementsInMemory="20000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="300" />
<cache name="org.openfans.domain.TagRelation" maxElementsInMemory="20000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="300" />
<cache name="org.openfans.domain.UseStatus" maxElementsInMemory="20000"
eternal="false" overflowToDisk="true" timeToIdleSeconds="300" />
<defaultCache maxElementsInMemory="10000" eternal="true"
overflowToDisk="true" timeToIdleSeconds="120" timeToLiveSeconds="120"
diskPersistent="false" diskExpiryThreadIntervalSeconds="120" />
<!-- See http://ehcache.sourceforge.net/documentation/#mozTocId258426 for how to configure caching for your objects -->
</ehcache>
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