org.ow2.jonas.resource.internal.cm.sql.cache
Class AbstractPreparedStatementCacheImpl

java.lang.Object
  org.ow2.jonas.resource.internal.cm.sql.cache.AbstractPreparedStatementCacheImpl

All Implemented Interfaces:

PreparedStatementCache

Direct Known Subclasses:

PreparedStatementListCacheImpl, PreparedStatementMapCacheImpl

public abstract class AbstractPreparedStatementCacheImpl
extends Object
implements PreparedStatementCache

Abstract class for the prepared statement cache implementation

Author:

pelletib

Field Summary

protected static org.objectweb.util.monolog.api.Logger	cacheLogger Logger
static String	LOCAL_STATISTIC_KEY Local statistic key
protected int	maxPstmtCacheSize max cache size
protected int	pstmtCacheSize current cache size
protected PreparedStatementCacheStatistics	stats Statistics

Fields inherited from interface org.ow2.jonas.resource.internal.cm.sql.cache.PreparedStatementCache

CACHE_POLICY_LIST, CACHE_POLICY_MAP

Constructor Summary

AbstractPreparedStatementCacheImpl(int maxCacheSize, PreparedStatementCacheStatistics pstmtStats, org.objectweb.util.monolog.api.Logger logger)
Constructor

Method Summary

abstract void	close() Close logically the cache entries
abstract void	destroy() Destroy the cache entries
abstract PreparedStatementWrapper	get(PreparedStatementWrapper psw) Retrieve an entry in the cache
int	getMaxPstmtCacheSize() Get the max pstmt cache size
int	getPstmtCacheSize() Get the current pstmt cache size
abstract String	getState(String prefix) Dump the pstmt cache state
abstract void	put(PreparedStatementWrapper psw) Add an entry in the cache
abstract void	reallyClose() Close really the cache entries
void	setMaxPstmtCacheSize(int maxSize) Set the max pstmt cache size

Methods inherited from class java.lang.Object

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

Field Detail

cacheLogger

protected static org.objectweb.util.monolog.api.Logger cacheLogger

Logger

maxPstmtCacheSize

protected int maxPstmtCacheSize

max cache size

pstmtCacheSize

protected int pstmtCacheSize

current cache size

stats

protected PreparedStatementCacheStatistics stats

Statistics

LOCAL_STATISTIC_KEY

public static String LOCAL_STATISTIC_KEY

Local statistic key

Constructor Detail

AbstractPreparedStatementCacheImpl

public AbstractPreparedStatementCacheImpl(int maxCacheSize,
                                          PreparedStatementCacheStatistics pstmtStats,
                                          org.objectweb.util.monolog.api.Logger logger)

Constructor

Parameters:

maxCacheSize - : max cache size

logger - : logger

Method Detail

get

public abstract PreparedStatementWrapper get(PreparedStatementWrapper psw)

Description copied from interface: PreparedStatementCache

Retrieve an entry in the cache

Specified by:

get in interface PreparedStatementCache

Parameters:

psw - : parameters of the prepared statement to retrieve

Returns:

wrapped prepared statement or null if not found

put

public abstract void put(PreparedStatementWrapper psw)
                  throws CacheException,
                         SQLException

Description copied from interface: PreparedStatementCache

Add an entry in the cache

Specified by:

put in interface PreparedStatementCache

Parameters:

psw - : wrapped prepared statement to add

Throws:

CacheException - no more space in cache

SQLException

setMaxPstmtCacheSize

public final void setMaxPstmtCacheSize(int maxSize)

Set the max pstmt cache size

Specified by:

setMaxPstmtCacheSize in interface PreparedStatementCache

Parameters:

maxSize - The max size to set.

getMaxPstmtCacheSize

public int getMaxPstmtCacheSize()

Get the max pstmt cache size

Specified by:

getMaxPstmtCacheSize in interface PreparedStatementCache

Returns:

Get the max cache size.

getPstmtCacheSize

public int getPstmtCacheSize()

Get the current pstmt cache size

Specified by:

getPstmtCacheSize in interface PreparedStatementCache

Returns:

Get the current cache size.

getState

public abstract String getState(String prefix)

Dump the pstmt cache state

Specified by:

getState in interface PreparedStatementCache

Parameters:

prefix - indentation

Returns:

a string with a cache state (dump)

destroy

public abstract void destroy()

Destroy the cache entries

Specified by:

destroy in interface PreparedStatementCache

reallyClose

public abstract void reallyClose()

Close really the cache entries

Specified by:

reallyClose in interface PreparedStatementCache

close

public abstract void close()

Close logically the cache entries

Specified by:

close in interface PreparedStatementCache