org.apache.jcs.auxiliary.disk.jdbc
Class JDBCDiskCacheManagerAbstractTemplate

java.lang.Object
  org.apache.jcs.auxiliary.disk.jdbc.JDBCDiskCacheManagerAbstractTemplate

All Implemented Interfaces:

java.io.Serializable, AuxiliaryCacheManager, ICacheType

Direct Known Subclasses:

JDBCDiskCacheManager, MySQLDiskCacheManager

public abstract class JDBCDiskCacheManagerAbstractTemplate
extends java.lang.Object
implements AuxiliaryCacheManager

This class serves as an abstract template for JDBCDiskCache Manager. The MySQL JDBC Disk Cache needs many of the same features as the generic maanger.

Author:

Aaron Smuts

See Also:

Serialized Form

Field Summary

protected static java.util.Hashtable	caches A map of JDBCDiskCache objects to region names.
protected static int	clients Incremented on getIntance, decremented on release.
protected static java.util.Hashtable	tableStates A map of TableState objects to table names.

Fields inherited from interface org.apache.jcs.engine.behavior.ICacheType

CACHE_HUB, DISK_CACHE, LATERAL_CACHE, REMOTE_CACHE

Constructor Summary

JDBCDiskCacheManagerAbstractTemplate()

Method Summary

protected abstract AuxiliaryCache	createJDBCDiskCache(JDBCDiskCacheAttributes cattr, TableState tableState) Children must implement this method.
protected void	createShrinkerWhenNeeded(JDBCDiskCacheAttributes cattr, AuxiliaryCache raf) If UseDiskShrinker is true then we will create a shrinker daemon if necessary.
void	freeCache(java.lang.String name)
AuxiliaryCache	getCache(JDBCDiskCacheAttributes cattr) Creates a JDBCDiskCache for the region if one doesn't exist, else it returns the precreated instance.
int	getCacheType() Gets the cacheType attribute of the HSQLCacheManager object
void	release() Disposes of all regions.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.jcs.auxiliary.AuxiliaryCacheManager

getCache

Field Detail

clients

protected static int clients

Incremented on getIntance, decremented on release.

caches

protected static java.util.Hashtable caches

A map of JDBCDiskCache objects to region names.

tableStates

protected static java.util.Hashtable tableStates

A map of TableState objects to table names. Each cache has a table state object, which is used to determin if any long processes such as deletes or optimizations are running.

Constructor Detail

JDBCDiskCacheManagerAbstractTemplate

public JDBCDiskCacheManagerAbstractTemplate()

Method Detail

createJDBCDiskCache

protected abstract AuxiliaryCache createJDBCDiskCache(JDBCDiskCacheAttributes cattr,
                                                      TableState tableState)

Children must implement this method.

Parameters:

cattr -

tableState - An object used by multiple processes to indicate state.

Returns:

AuxiliaryCache -- a JDBCDiskCache

getCache

public AuxiliaryCache getCache(JDBCDiskCacheAttributes cattr)

Creates a JDBCDiskCache for the region if one doesn't exist, else it returns the precreated instance. It also adds the region to the shrinker thread if needed.

Parameters:

cattr -

Returns:

The cache value

createShrinkerWhenNeeded

protected void createShrinkerWhenNeeded(JDBCDiskCacheAttributes cattr,
                                        AuxiliaryCache raf)

If UseDiskShrinker is true then we will create a shrinker daemon if necessary.

Parameters:

cattr -

raf -

freeCache

public void freeCache(java.lang.String name)

Parameters:

name -

getCacheType

public int getCacheType()

Gets the cacheType attribute of the HSQLCacheManager object

Specified by:

getCacheType in interface ICacheType

Returns:

The cacheType value

release

public void release()

Disposes of all regions.