com.thimbleware.jmemcached
Class AbstractCache<CACHE_ELEMENT extends CacheElement>

java.lang.Object
  com.thimbleware.jmemcached.AbstractCache<CACHE_ELEMENT>

All Implemented Interfaces:

Cache<CACHE_ELEMENT>

Direct Known Subclasses:

CacheImpl

public abstract class AbstractCache<CACHE_ELEMENT extends CacheElement>
extends java.lang.Object
implements Cache<CACHE_ELEMENT>

Abstract implementation of a cache handler for the memcache daemon; provides some convenience methods and a general framework for implementation

Nested Class Summary

Nested classes/interfaces inherited from interface com.thimbleware.jmemcached.Cache

Cache.DeleteResponse, Cache.StoreResponse

Field Summary

protected java.util.concurrent.atomic.AtomicLong	casCounter
protected java.util.concurrent.atomic.AtomicInteger	getCmds
protected java.util.concurrent.atomic.AtomicInteger	getHits
protected java.util.concurrent.atomic.AtomicInteger	getMisses
protected java.util.concurrent.atomic.AtomicInteger	setCmds
protected java.util.concurrent.atomic.AtomicLong	started

Constructor Summary

AbstractCache()

Method Summary

abstract void	asyncEventPing() Called periodically by the network event loop to process any pending events.
abstract long	getCurrentBytes()
abstract long	getCurrentItems()
int	getGetCmds()
int	getGetHits()
int	getGetMisses()
abstract long	getLimitMaxBytes()
int	getSetCmds()
protected void	initStats() Initialize all statistic counters
protected abstract java.util.Set<Key>	keys()
static int	Now()
java.util.Map<java.lang.String,java.util.Set<java.lang.String>>	stat(java.lang.String arg) Return runtime statistics

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.thimbleware.jmemcached.Cache

add, append, cas, close, delete, flush_all, flush_all, get_add, get, prepend, replace, set

Field Detail

started

protected final java.util.concurrent.atomic.AtomicLong started

getCmds

protected final java.util.concurrent.atomic.AtomicInteger getCmds

setCmds

protected final java.util.concurrent.atomic.AtomicInteger setCmds

getHits

protected final java.util.concurrent.atomic.AtomicInteger getHits

getMisses

protected final java.util.concurrent.atomic.AtomicInteger getMisses

casCounter

protected final java.util.concurrent.atomic.AtomicLong casCounter

Constructor Detail

AbstractCache

public AbstractCache()

Method Detail

Now

public static int Now()

Returns:

the current time in seconds (from epoch), used for expiries, etc.

keys

protected abstract java.util.Set<Key> keys()

getCurrentItems

public abstract long getCurrentItems()

Specified by:

getCurrentItems in interface Cache<CACHE_ELEMENT extends CacheElement>

Returns:

the # of items in the cache

getLimitMaxBytes

public abstract long getLimitMaxBytes()

Specified by:

getLimitMaxBytes in interface Cache<CACHE_ELEMENT extends CacheElement>

Returns:

the maximum size of the cache (in bytes)

getCurrentBytes

public abstract long getCurrentBytes()

Specified by:

getCurrentBytes in interface Cache<CACHE_ELEMENT extends CacheElement>

Returns:

the current cache usage (in bytes)

getGetCmds

public final int getGetCmds()

Specified by:

getGetCmds in interface Cache<CACHE_ELEMENT extends CacheElement>

Returns:

the number of get commands executed

getSetCmds

public final int getSetCmds()

Specified by:

getSetCmds in interface Cache<CACHE_ELEMENT extends CacheElement>

Returns:

the number of set commands executed

getGetHits

public final int getGetHits()

Specified by:

getGetHits in interface Cache<CACHE_ELEMENT extends CacheElement>

Returns:

the number of get hits

getGetMisses

public final int getGetMisses()

Specified by:

getGetMisses in interface Cache<CACHE_ELEMENT extends CacheElement>

Returns:

the number of stats

stat

public final java.util.Map<java.lang.String,java.util.Set<java.lang.String>> stat(java.lang.String arg)

Return runtime statistics

Specified by:

stat in interface Cache<CACHE_ELEMENT extends CacheElement>

Parameters:

arg - additional arguments to the stats command

Returns:

the full command response

initStats

protected void initStats()

Initialize all statistic counters

asyncEventPing

public abstract void asyncEventPing()

Description copied from interface: Cache

Called periodically by the network event loop to process any pending events. (such as delete queues, etc.)

Specified by:

asyncEventPing in interface Cache<CACHE_ELEMENT extends CacheElement>