&引用；无法删除[Class]的磁盘存储项；在Grails中-如何禁用基于磁盘的缓存？

我在Grails应用程序中遇到以下异常：

[1564928] store.DiskStore ClassNameCache: Could not remove disk store entry for ClassName#123195371. Error was null
java.io.EOFException
       at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2297)
       at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2766)
       at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:797)
       at java.io.ObjectInputStream.<init>(ObjectInputStream.java:297)
       at net.sf.ehcache.store.DiskStore$1.<init>(DiskStore.java:316)
       at net.sf.ehcache.store.DiskStore.loadElementFromDiskElement(DiskStore.java:316)
       at net.sf.ehcache.store.DiskStore.expireElements(DiskStore.java:973)
       at net.sf.ehcache.store.DiskStore.throwableSafeExpireElementsIfRequired(DiskStore.java:657)
       at net.sf.ehcache.store.DiskStore.spoolAndExpiryThreadMain(DiskStore.java:645)
       at net.sf.ehcache.store.DiskStore.access$900(DiskStore.java:68)
       at net.sf.ehcache.store.DiskStore$SpoolAndExpiryThread.run(DiskStore.java:1110)

似乎当前的缓存设置正在写入

/tmp/tomcat6 tmp/

---

我想完全禁用磁盘缓存，而只缓存到内存。怎么做？

如果类路径中没有ehcache.xml文件，ehcache将使用其默认设置。但如果您确实有一个（放在grails app/conf或src/java中），那么将使用它。上的示例有很好的文档记录

这样的事情应该行得通；调整未显式声明的缓存的默认缓存设置（尽管为了文档起见，我更愿意创建它们），并定义任何具有非默认设置的特定缓存：

<ehcache>

   <diskStore path='java.io.tmpdir' />

   <defaultCache
      maxElementsInMemory='10000'
      eternal='false'
      timeToIdleSeconds='120'
      timeToLiveSeconds='120'
      overflowToDisk='true'
      maxElementsOnDisk='10000000'
      diskPersistent='false'
      diskExpiryThreadIntervalSeconds='120'
      memoryStoreEvictionPolicy='LRU'
   />

   <cache name='com.yourcompany.yourapp.DomainClassName'
      maxElementsInMemory='1000'
      overflowToDisk='false'
   />

   <!-- hibernate stuff -->
   <cache name='org.hibernate.cache.StandardQueryCache'
      maxElementsInMemory='50'
      eternal='false'
      timeToLiveSeconds='120'
      maxElementsOnDisk='0'
   />

   <cache name='org.hibernate.cache.UpdateTimestampsCache'
      maxElementsInMemory='5000'
      eternal='true'
      maxElementsOnDisk='0'
   />

</ehcache>

将两个Hibernate缓存放在其中也是一个好主意，这样就可以根据需要方便地调整它们

<ehcache>

   <diskStore path='java.io.tmpdir' />

   <defaultCache
      maxElementsInMemory='10000'
      eternal='false'
      timeToIdleSeconds='120'
      timeToLiveSeconds='120'
      overflowToDisk='true'
      maxElementsOnDisk='10000000'
      diskPersistent='false'
      diskExpiryThreadIntervalSeconds='120'
      memoryStoreEvictionPolicy='LRU'
   />

   <cache name='com.yourcompany.yourapp.DomainClassName'
      maxElementsInMemory='1000'
      overflowToDisk='false'
   />

   <!-- hibernate stuff -->
   <cache name='org.hibernate.cache.StandardQueryCache'
      maxElementsInMemory='50'
      eternal='false'
      timeToLiveSeconds='120'
      maxElementsOnDisk='0'
   />

   <cache name='org.hibernate.cache.UpdateTimestampsCache'
      maxElementsInMemory='5000'
      eternal='true'
      maxElementsOnDisk='0'
   />

</ehcache>