|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Objectorg.apache.jackrabbit.core.cache.AbstractCache
public abstract class AbstractCache
Abstract base class for managed Cache
s. This class uses atomic
variables to track the current and maximum size of the cache, the cache
access count and a possible CacheAccessListener
instance.
A subclass should call the protected recordCacheAccess()
method
whenever the cache is accessed (even cache misses should be reported).
The subclass should also use the recordSizeChange(long)
method
to record all changes in the cache size, and automatically evict excess
items when the isTooBig()
method returns true
.
Constructor Summary | |
---|---|
AbstractCache()
|
Method Summary | |
---|---|
void |
dispose()
|
long |
getAccessCount()
Get the number of accesses (get or set) until resetAccessCount was called. |
String |
getCacheInfoAsString()
Gathers the stats of the cache for logging. |
long |
getMaxMemorySize()
Get the current limit. |
long |
getMemoryUsed()
Get the amount of used memory. |
long |
getMissCount()
Get the number of cache misses. |
long |
getTotalAccessCount()
Get the total number of cache accesses. |
protected boolean |
isTooBig()
Checks whether the current estimate of the amount of memory used by this cache exceeds the allocated maximum amount of memory. |
protected void |
recordCacheAccess()
Records a single cache access and calls the configured CacheAccessListener (if any) whenever the constant access
interval has passed since the previous listener call. |
protected void |
recordCacheMiss()
|
protected void |
recordSizeChange(long delta)
Updates the current memory use estimate of this cache. |
void |
resetAccessCount()
Reset the access counter. |
void |
resetMissCount()
Reset the cache miss counter. |
void |
setAccessListener(CacheAccessListener listener)
Set the cache access listener. |
void |
setMaxMemorySize(long size)
Set the new memory limit. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.jackrabbit.core.cache.Cache |
---|
getElementCount |
Constructor Detail |
---|
public AbstractCache()
Method Detail |
---|
protected boolean isTooBig()
true
if the cache size is too big,
false
otherwiseprotected void recordSizeChange(long delta)
delta
- number of bytes added or removedprotected void recordCacheAccess()
CacheAccessListener
(if any) whenever the constant access
interval has passed since the previous listener call.
protected void recordCacheMiss()
public long getAccessCount()
Cache
getAccessCount
in interface Cache
public void resetAccessCount()
Cache
resetAccessCount
in interface Cache
public long getTotalAccessCount()
Cache
getTotalAccessCount
in interface Cache
public long getMissCount()
Cache
getMissCount
in interface Cache
public void resetMissCount()
Cache
resetMissCount
in interface Cache
public long getMemoryUsed()
Cache
getMemoryUsed
in interface Cache
public long getMaxMemorySize()
Cache
getMaxMemorySize
in interface Cache
public void setMaxMemorySize(long size)
Cache
setMaxMemorySize
in interface Cache
size
- the size in bytespublic void setAccessListener(CacheAccessListener listener)
setAccessListener
in interface Cache
listener
- the new listenerpublic void dispose()
public String getCacheInfoAsString()
getCacheInfoAsString
in interface Cache
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |