Package org.apache.commons.jcs3.auxiliary.disk.jdbc.mysql

Class MySQLDiskCache<K,V>

java.lang.Object

org.apache.commons.jcs3.auxiliary.AbstractAuxiliaryCache<K,V>

org.apache.commons.jcs3.auxiliary.AbstractAuxiliaryCacheEventLogging<K,V>

org.apache.commons.jcs3.auxiliary.disk.AbstractDiskCache<K,V>

org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCache<K,V>

org.apache.commons.jcs3.auxiliary.disk.jdbc.mysql.MySQLDiskCache<K,V>

All Implemented Interfaces:

AuxiliaryCache<K,V>, ICache<K,V>, ICacheType

public class MySQLDiskCache<K,V>
extends JDBCDiskCache<K,V>

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.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.commons.jcs3.auxiliary.disk.AbstractDiskCache

AbstractDiskCache.MyCacheListener

Nested classes/interfaces inherited from interface org.apache.commons.jcs3.engine.behavior.ICacheType

ICacheType.CacheType

Field Summary

Fields inherited from interface org.apache.commons.jcs3.engine.behavior.ICache

NAME_COMPONENT_DELIMITER

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
String	constructLikeParameterFromPattern(String pattern)
protected int	deleteExpired()	Removed the expired.
protected ICacheElement<K,V>	processGet(K key)	This delegates to the generic JDBC disk cache.
protected Map<K,ICacheElement<K,V>>	processGetMatching(String pattern)	This delegates to the generic JDBC disk cache.
protected void	processUpdate(ICacheElement<K,V> element)	This delegates to the generic JDBC disk cache.

Methods inherited from class org.apache.commons.jcs3.auxiliary.disk.jdbc.JDBCDiskCache

doesElementExist, getAuxiliaryCacheAttributes, getDataSource, getDiskLocation, getJdbcDiskCacheAttributes, getKeySet, getSize, getStatistics, getTableName, getTableState, processDispose, processRemove, processRemoveAll, reset, setJdbcDiskCacheAttributes, setTableState, toString

Methods inherited from class org.apache.commons.jcs3.auxiliary.disk.AbstractDiskCache

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

Methods inherited from class org.apache.commons.jcs3.auxiliary.AbstractAuxiliaryCacheEventLogging

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

Methods inherited from class org.apache.commons.jcs3.auxiliary.AbstractAuxiliaryCache

createICacheEvent, createICacheEvent, getCacheEventLogger, getElementSerializer, getKeyMatcher, logApplicationEvent, logError, logICacheEvent, processGetMultiple, setCacheEventLogger, setElementSerializer, setKeyMatcher

Methods inherited from class java.lang.Object

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

Constructor Details

MySQLDiskCache

public MySQLDiskCache(MySQLDiskCacheAttributes attributes,
 DataSourceFactory dsFactory,
 TableState tableState)
               throws SQLException

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

Parameters:

attributes - the configuration object for this cache

dsFactory - the DataSourceFactory for this cache

tableState - an object to track table operations

Throws:

SQLException - if the pool access could not be set up

Method Details

processGet

protected ICacheElement<K,V> processGet(K 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<K,V>

Parameters:

key - Key to locate value for.

Returns:

An object matching key, or null.

See Also:

• AbstractDiskCache.get(Object)

processGetMatching

protected Map<K,ICacheElement<K,V>> processGetMatching(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<K,V>

Parameters:

pattern - used for like query.

Returns:

An object matching key, or null.

constructLikeParameterFromPattern

public String constructLikeParameterFromPattern(String pattern)

Overrides:

constructLikeParameterFromPattern in class JDBCDiskCache<K,V>

Parameters:

pattern -

Returns:

String to use in the like query.

processUpdate

protected void processUpdate(ICacheElement<K,V> 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<K,V>

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<K,V>

Returns:

the number deleted