org.objectweb.cjdbc.controller.cache.parsing
Class ParsingCache

java.lang.Object
  org.objectweb.cjdbc.controller.cache.parsing.ParsingCache

public class ParsingCache

extends java.lang.Object

This class implements a request parsing cache.

Version:

1.0

Author:

Emmanuel Cecchet

Nested Class Summary

private class

ParsingCache.CurrentlyParsingEntry CurrentlyParsingEntry contains a (Request,ParserThread) which is an element of the currentlyParsing Hashtable.

Field Summary

private boolean	backgroundParsing
private java.util.Hashtable	cache
private boolean	caseSensitiveParsing
private java.util.Hashtable	currentlyParsing
private int	granularity
private static Trace	logger
private int	maxNbOfEntries
private RequestManager	requestManager

Constructor Summary

ParsingCache(int size, boolean backgroundParsing)
Constructor for ParsingCache.

Method Summary

int	getGranularity() Returns the granularity value.
void	getParsingFromCache(AbstractRequest request) If the same SQL query is found in the cache, the parsing is cloned into the given request.
void	getParsingFromCacheAndParseIfMissing(AbstractRequest request) Method getParsingFromCacheAndParseIfMissing.
RequestManager	getRequestManager() Returns the requestManager value.
java.lang.String	getXml() Get xml information about this ParsingCache
boolean	isBackgroundParsing() Returns the backgroundParsing.
boolean	isCaseSensitiveParsing() Returns the caseSensitiveParsin.
void	setBackgroundParsing(boolean backgroundParsing) Sets the background parsing.
void	setCaseSensitiveParsing(boolean isCaseSensitiveParsing) Sets the parsing case sensitivity
void	setGranularity(int granularity) Sets the granularity value.
void	setRequestManager(RequestManager requestManager) Sets the requestManager value.

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static Trace logger

cache

private java.util.Hashtable cache

currentlyParsing

private java.util.Hashtable currentlyParsing

requestManager

private RequestManager requestManager

granularity

private int granularity

maxNbOfEntries

private int maxNbOfEntries

backgroundParsing

private boolean backgroundParsing

caseSensitiveParsing

private boolean caseSensitiveParsing

Constructor Detail

ParsingCache

public ParsingCache(int size,
                    boolean backgroundParsing)

Constructor for ParsingCache.

Parameters:

size - maximum cache size in nb of entries

backgroundParsing - true if the parsing should be done in background by a ParserThread

Method Detail

getGranularity

public int getGranularity()

Returns the granularity value.

Returns:

Returns the granularity.

setGranularity

public void setGranularity(int granularity)

Sets the granularity value.

Parameters:

granularity - The granularity to set.

getRequestManager

public RequestManager getRequestManager()

Returns the requestManager value.

Returns:

Returns the requestManager.

setRequestManager

public void setRequestManager(RequestManager requestManager)

Sets the requestManager value.

Parameters:

requestManager - The requestManager to set.

getParsingFromCache

public void getParsingFromCache(AbstractRequest request)

If the same SQL query is found in the cache, the parsing is cloned into the given request. If backgroundParsing is set to true, then a ParserThread starts parsing the request in background else nothing is done on a cache miss.

Parameters:

request - the request you look for

getParsingFromCacheAndParseIfMissing

public void getParsingFromCacheAndParseIfMissing(AbstractRequest request)
                                          throws java.sql.SQLException

Method getParsingFromCacheAndParseIfMissing.

Parameters:

request - the request we look for

Throws:

java.sql.SQLException - if an error occurs

isBackgroundParsing

public boolean isBackgroundParsing()

Returns the backgroundParsing.

Returns:

boolean

setBackgroundParsing

public void setBackgroundParsing(boolean backgroundParsing)

Sets the background parsing. If true the request are parsed in background by a separate thread that is created for this purpose.

Parameters:

backgroundParsing - The backgroundParsing to set

setCaseSensitiveParsing

public void setCaseSensitiveParsing(boolean isCaseSensitiveParsing)

Sets the parsing case sensitivity

Parameters:

isCaseSensitiveParsing - true if parsing is case sensitive

isCaseSensitiveParsing

public boolean isCaseSensitiveParsing()

Returns the caseSensitiveParsin.

Returns:

boolean

getXml

public java.lang.String getXml()

Get xml information about this ParsingCache

Returns:

String in xml formatted text