小编Gag*_*ora的帖子

我一直在尝试使用ehcache配置JPA但直到现在都没有成功.我正在做的配置是:

• persistence.xml中

  <persistence-unit name="customDatabase">
    <jta-data-source>jdbc/oracleXE_DS</jta-data-source>
    <class>com.td.waw.cse.entities.Product</class>
    <properties>
                     <property name="openjpa.Log" value="DefaultLevel=TRACE, Runtime=INFO, Tool=INFO, SQL=TRACE"/>
             <property name="openjpa.QueryCache" value="net.sf.ehcache.openjpa.datacache.EhCacheQueryCache"/>
     <property name="openjpa.DataCacheManager" value="net.sf.ehcache.openjpa.datacache.EhCacheDataCacheManager"/>
     <property name="openjpa.DataCache" value="net.sf.ehcache.openjpa.datacache.EhCacheDataCache"/>
     <property name="openjpa.RemoteCommitProvider" value="net.sf.ehcache.openjpa.datacache.NoOpRemoteCommitProvider"/>
  </properties>
  

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• ehcache.xml中

  <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:noNamespaceSchemaLocation="ehcache.xsd"
           updateCheck="true" monitoring="autodetect"
           dynamicConfig="true" >
      <defaultCache
      maxElementsInMemory="1000"
      eternal="false"
      timeToIdleSeconds="300"
      timeToLiveSeconds="600"
      overflowToDisk="false"
      memoryStoreEvictionPolicy="LRU"
      />
  
      <!-- OpenJPA data cache -->
      <cache name="openjpa"
      maxElementsInMemory="5000"
      eternal="false"
      timeToIdleSeconds="300"
      timeToLiveSeconds="600"
      overflowToDisk="false"
      memoryStoreEvictionPolicy="LRU"
      />
  
      <!-- OpenJPA query cache -->
      <cache name="openjpa-querycache"
      maxElementsInMemory="1000"
      eternal="false"
      timeToIdleSeconds="300"
      timeToLiveSeconds="600"
      overflowToDisk="false"
      memoryStoreEvictionPolicy="LRU"
      />
  </ehcache>
  

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• Product.java

  @Entity
  @Table(name="PRODUCT")
  @NamedQueries({@NamedQuery(name="getAllProducts", query = "select products from …

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