org.apache.jcs.auxiliary.disk.jdbc.mysql

Class MySQLDiskCache

java.lang.Object

org.apache.jcs.auxiliary.AbstractAuxiliaryCache

org.apache.jcs.auxiliary.AbstractAuxiliaryCacheEventLogging

org.apache.jcs.auxiliary.disk.AbstractDiskCache

org.apache.jcs.auxiliary.disk.jdbc.JDBCDiskCache

org.apache.jcs.auxiliary.disk.jdbc.mysql.MySQLDiskCache

All Implemented Interfaces:

java.io.Serializable, AuxiliaryCache, ICache, ICacheType

public class MySQLDiskCache
extends JDBCDiskCache

The MySQLDiskCache extends the core JDBCDiskCache.

Although the generic JDBC Disk Cache can be used for MySQL, the MySQL JDBC Disk Cache has additional features, such as table optimization that are particular to MySQL.

Author:

Aaron Smuts

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.jcs.auxiliary.disk.AbstractDiskCache

alive, cacheEventQueue, cacheName, purgatory, purgHits

Fields inherited from class org.apache.jcs.auxiliary.AbstractAuxiliaryCache

cacheEventLogger, keyMatcher

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

CACHE_HUB, DISK_CACHE, LATERAL_CACHE, REMOTE_CACHE

Constructor Summary

Constructors

Constructor and Description
MySQLDiskCache(MySQLDiskCacheAttributes attributes, TableState tableState, ICompositeCacheManager compositeCacheManager) Delegates to the super and makes use of the MySQL specific parameters used for scheduled optimization.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	constructLikeParameterFromPattern(java.lang.String pattern)
protected int	deleteExpired() Removed the expired.
protected ICacheElement	processGet(java.io.Serializable key) This delegates to the generic JDBC disk cache.
protected java.util.Map	processGetMatching(java.lang.String pattern) This delegates to the generic JDBC disk cache.
protected void	processUpdate(ICacheElement element) This delegates to the generic JDBC disk cache.

Methods inherited from class org.apache.jcs.auxiliary.disk.jdbc.JDBCDiskCache

doesElementExist, getAuxiliaryCacheAttributes, getDiskLocation, getElementSerializer, getGroupKeys, getJdbcDiskCacheAttributes, getPoolAccess, getSize, getStatistics, getTableName, getTableState, initializePoolAccess, processDispose, processRemove, processRemoveAll, reset, serialize, setElementSerializer, setJdbcDiskCacheAttributes, setPoolAccess, setTableState, toString

Methods inherited from class org.apache.jcs.auxiliary.disk.AbstractDiskCache

dispose, doDispose, doGet, doGetMatching, doRemove, doRemoveAll, doUpdate, get, getCacheName, getCacheType, getEventLoggingExtraInfo, getMatching, getStats, getStatus, processGetMultiple, remove, removeAll, update

Methods inherited from class org.apache.jcs.auxiliary.AbstractAuxiliaryCacheEventLogging

disposeWithEventLogging, getMatchingWithEventLogging, getMultiple, getMultipleWithEventLogging, getWithEventLogging, removeAllWithEventLogging, removeWithEventLogging, updateWithEventLogging

Methods inherited from class org.apache.jcs.auxiliary.AbstractAuxiliaryCache

createICacheEvent, createICacheEvent, getCacheEventLogger, getKeyMatcher, logApplicationEvent, logError, logICacheEvent, setCacheEventLogger, setKeyMatcher

Methods inherited from class java.lang.Object

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

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

setCacheEventLogger

Methods inherited from interface org.apache.jcs.engine.behavior.ICache

getMultiple, setKeyMatcher

Constructor Detail

MySQLDiskCache

public MySQLDiskCache(MySQLDiskCacheAttributes attributes,
              TableState tableState,
              ICompositeCacheManager compositeCacheManager)

Delegates to the super and makes use of the MySQL specific parameters used for scheduled optimization.

Parameters:

attributes -

tableState -

compositeCacheManager -

Method Detail

processGet

protected ICacheElement processGet(java.io.Serializable key)

This delegates to the generic JDBC disk cache. If we are currently optimizing, then this method will balk and return null.

Overrides:

processGet in class JDBCDiskCache

Parameters:

key - Key to locate value for.

Returns:

An object matching key, or null.

See Also:

AbstractDiskCache.doGet(java.io.Serializable)

processGetMatching

protected java.util.Map processGetMatching(java.lang.String pattern)

This delegates to the generic JDBC disk cache. If we are currently optimizing, then this method will balk and return null.

Overrides:

processGetMatching in class JDBCDiskCache

Parameters:

pattern - used for like query.

Returns:

An object matching key, or null.

constructLikeParameterFromPattern

public java.lang.String constructLikeParameterFromPattern(java.lang.String pattern)

Overrides:

constructLikeParameterFromPattern in class JDBCDiskCache

Parameters:

pattern -

Returns:

String to use in the like query.

processUpdate

protected void processUpdate(ICacheElement element)

This delegates to the generic JDBC disk cache. If we are currently optimizing, then this method will balk and do nothing.

Overrides:

processUpdate in class JDBCDiskCache

Parameters:

element -

deleteExpired

protected int deleteExpired()

Removed the expired. (now - create time) > max life seconds * 1000

If we are currently optimizing, then this method will balk and do nothing.

TODO consider blocking and trying again.

Overrides:

deleteExpired in class JDBCDiskCache

Returns:

the number deleted