org.apache.cassandra.cache
Class AutoSavingCache<K extends CacheKey,V>

java.lang.Object
  org.apache.cassandra.cache.InstrumentingCache<K,V>
      org.apache.cassandra.cache.AutoSavingCache<K,V>

public class AutoSavingCache<K extends CacheKey,V>
extends InstrumentingCache<K,V>

Nested Class Summary

static interface	AutoSavingCache.CacheSerializer<K extends CacheKey,V>
class	AutoSavingCache.Writer

Field Summary

protected CacheService.CacheType	cacheType
static java.util.Set<CacheService.CacheType>	flushInProgress True if a cache flush is currently executing: only one may execute at a time.
protected java.util.concurrent.ScheduledFuture<?>	saveTask

Constructor Summary

AutoSavingCache(ICache<K,V> cache, CacheService.CacheType cacheType, AutoSavingCache.CacheSerializer<K,V> cacheloader)

Method Summary

java.io.File	getCachePath(java.lang.String ksName, java.lang.String cfName, java.lang.String version)
AutoSavingCache.Writer	getWriter(int keysToSave)
int	loadSaved(ColumnFamilyStore cfs)
void	reduceCacheSize()
void	scheduleSaving(int savePeriodInSeconds, int keysToSave)
java.util.concurrent.Future<?>	submitWrite(int keysToSave)

Methods inherited from class org.apache.cassandra.cache.InstrumentingCache

clear, containsKey, get, getCapacity, getInternal, getKeySet, getMetrics, hotKeySet, isCapacitySetManually, isPutCopying, put, putIfAbsent, remove, replace, setCapacity, size, updateCapacity, weightedSize

Methods inherited from class java.lang.Object

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

Field Detail

flushInProgress

public static final java.util.Set<CacheService.CacheType> flushInProgress

True if a cache flush is currently executing: only one may execute at a time.

saveTask

protected volatile java.util.concurrent.ScheduledFuture<?> saveTask

cacheType

protected final CacheService.CacheType cacheType

Constructor Detail

AutoSavingCache

public AutoSavingCache(ICache<K,V> cache,
                       CacheService.CacheType cacheType,
                       AutoSavingCache.CacheSerializer<K,V> cacheloader)

Method Detail

getCachePath

public java.io.File getCachePath(java.lang.String ksName,
                                 java.lang.String cfName,
                                 java.lang.String version)

getWriter

public AutoSavingCache.Writer getWriter(int keysToSave)

scheduleSaving

public void scheduleSaving(int savePeriodInSeconds,
                           int keysToSave)

loadSaved

public int loadSaved(ColumnFamilyStore cfs)

submitWrite

public java.util.concurrent.Future<?> submitWrite(int keysToSave)

reduceCacheSize

public void reduceCacheSize()