Package net.ontopia.persistence.proxy

Class StatisticsCache

java.lang.Object
net.ontopia.persistence.proxy.StatisticsCache
All Implemented Interfaces:
StorageCacheIF
public class StatisticsCache extends Object implements StorageCacheIF
INTERNAL: A transactional storage cache implementation. The cache uses the transactions identity map to lookup objects and stores its cache entries directly on the PersistentIFs.

  • Field Details

    • total_o

      protected int total_o

    • total_f

      protected int total_f

    • hits_o

      protected int hits_o

    • hits_f

      protected int hits_f

    • misses_o

      protected int misses_o

    • misses_f

      protected int misses_f

    • dump_interval

      protected int dump_interval

    • name

      protected String name

    • pcache

      protected StorageCacheIF pcache

  • Method Details

    • getRegistrar

      public AccessRegistrarIF getRegistrar()
      Description copied from interface: StorageCacheIF
      INTERNAL: Returns the access registrar instance that is used by the storage cache. If it does not need an access registrar, or it does not have one, null is returned.
      Specified by:
      getRegistrar in interface StorageCacheIF

    • close

      public void close()
      Description copied from interface: StorageCacheIF
      INTERNAL: Releases all resources used by the storage cache.
      Specified by:
      close in interface StorageCacheIF

    • exists

      public boolean exists(StorageAccessIF access, IdentityIF identity)
      Description copied from interface: StorageCacheIF
      INTERNAL: Can be called to verify whether the specified identity exists in the cache or in the data repository. Whether the data repository is actually asked depends on the policy of the storage cache.
      Specified by:
      exists in interface StorageCacheIF

    • getValue

      public Object getValue(StorageAccessIF access, IdentityIF identity, int field)
      Description copied from interface: StorageCacheIF
      INTERNAL: A call forwarded by the transaction (TransactionIF) from persistent objects (PersistentIF) when the field value needs to be retrieved from storage. The field value will be returned.
      Specified by:
      getValue in interface StorageCacheIF

    • isObjectLoaded

      public boolean isObjectLoaded(IdentityIF identity)
      Description copied from interface: StorageCacheIF
      INTERNAL: Can be called to check if the identity has been registered with the cache. The data repository will not be asked.
      Specified by:
      isObjectLoaded in interface StorageCacheIF

    • isFieldLoaded

      public boolean isFieldLoaded(IdentityIF identity, int field)
      Description copied from interface: StorageCacheIF
      INTERNAL: Can be called to check if the specfied field has been registered with the cache. The data repository will not be asked.
      Specified by:
      isFieldLoaded in interface StorageCacheIF

    • registerEviction

      public void registerEviction()
      Description copied from interface: StorageCacheIF
      INTERNAL: Tells the cache that eviction is starting.
      Specified by:
      registerEviction in interface StorageCacheIF

    • releaseEviction

      public void releaseEviction()
      Description copied from interface: StorageCacheIF
      INTERNAL: Deregister eviction.
      Specified by:
      releaseEviction in interface StorageCacheIF

    • evictIdentity

      public void evictIdentity(IdentityIF identity, boolean notifyCluster)
      Description copied from interface: StorageCacheIF
      INTERNAL: Evict the identity from the cache.
      Specified by:
      evictIdentity in interface StorageCacheIF

    • evictFields

      public void evictFields(IdentityIF identity, boolean notifyCluster)
      Description copied from interface: StorageCacheIF
      INTERNAL: Evict all the identity's field values from the cache.
      Specified by:
      evictFields in interface StorageCacheIF

    • evictField

      public void evictField(IdentityIF identity, int field, boolean notifyCluster)
      Description copied from interface: StorageCacheIF
      INTERNAL: Evict the identity's field value from the cache.
      Specified by:
      evictField in interface StorageCacheIF

    • clear

      public void clear(boolean notifyCluster)
      Description copied from interface: StorageCacheIF
      INTERNAL: Clears the cache.
      Specified by:
      clear in interface StorageCacheIF

    • prefetch

      public int prefetch(StorageAccessIF access, Class<?> type, int field, int nextField, boolean traverse, Collection<IdentityIF> identities)
      Specified by:
      prefetch in interface StorageCacheIF

    • percent

      protected int percent(int c, int total)

    • dump

      public void dump()

    • toString

      public String toString()
      Overrides:
      toString in class Object