kodo.datacache
Class MonitoringDataCache

java.lang.Object
  org.apache.openjpa.datacache.DelegatingDataCache
      kodo.datacache.MonitoringDataCache

All Implemented Interfaces:

StatisticsProvider, DataCache, Closeable

public class MonitoringDataCache
extends DelegatingDataCache
implements StatisticsProvider

Delegating cache that provides monitoring statistics.

Field Summary

Fields inherited from interface org.apache.openjpa.datacache.DataCache

NAME_DEFAULT

Constructor Summary

MonitoringDataCache(OpenJPAConfiguration conf, DataCache cache)
Provide delegate on construction.

Method Summary

void	close()
DataCachePCData	get(Object oid)
double	getHitRate() Returns the percentage of hits.
int	getHits() Returns the number of cache hits for invocations of the get(java.lang.Object) method.
int	getMisses() Returns the number of cache misses for invocations of the get(java.lang.Object) method.
Collection	getStatistics() Get statistics exported by this object.
String	getStatisticsString() Returns a localized string containing the number of hits, the number of misses, and the hit ratio (hits / (hits+misses)).
void	resetStatistics() Reset the caching statistics.

Methods inherited from class org.apache.openjpa.datacache.DelegatingDataCache

addExpirationListener, clear, commit, contains, containsAll, equals, getAll, getDelegate, getInnermostDelegate, getName, hashCode, initialize, pin, pinAll, pinAll, put, remove, removeAll, removeAll, removeExpirationListener, setName, translate, unpin, unpinAll, unpinAll, update, writeLock, writeUnlock

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MonitoringDataCache

public MonitoringDataCache(OpenJPAConfiguration conf,
                           DataCache cache)

Provide delegate on construction.

Method Detail

getHits

public int getHits()

Returns the number of cache hits for invocations of the get(java.lang.Object) method.

getMisses

public int getMisses()

Returns the number of cache misses for invocations of the get(java.lang.Object) method.

getHitRate

public double getHitRate()

Returns the percentage of hits.

getStatisticsString

public String getStatisticsString()

Returns a localized string containing the number of hits, the number of misses, and the hit ratio (hits / (hits+misses)).

getStatistics

public Collection getStatistics()

Get statistics exported by this object.

Specified by:

getStatistics in interface StatisticsProvider

resetStatistics

public void resetStatistics()

Reset the caching statistics.

get

public DataCachePCData get(Object oid)

Specified by:

get in interface DataCache

Overrides:

get in class DelegatingDataCache

close

public void close()

Specified by:

close in interface DataCache

Specified by:

close in interface Closeable

Overrides:

close in class DelegatingDataCache