org.objectweb.cjdbc.controller.cache.result
Class ResultCacheColumnUnique

java.lang.Object
  org.objectweb.cjdbc.controller.cache.result.AbstractResultCache
      org.objectweb.cjdbc.controller.cache.result.ResultCache
          org.objectweb.cjdbc.controller.cache.result.ResultCacheColumnUnique

All Implemented Interfaces:

XmlComponent

public class ResultCacheColumnUnique

extends ResultCache

This is a query cache implementation with a column unique granularity:

• COLUMN_UNIQUE: same as COLUMN except that UNIQUE queries that selects a single row based on a key are invalidated only when needed.

Version:

1.0

Author:

Emmanuel Cecchet , Nicolas Modrzyk

Field Summary

Fields inherited from class org.objectweb.cjdbc.controller.cache.result.ResultCache

cdbs

Fields inherited from class org.objectweb.cjdbc.controller.cache.result.AbstractResultCache

logger, parsingGranularity

Fields inherited from interface org.objectweb.cjdbc.common.xml.XmlComponent

DOCTYPE_CONTROLLER, DOCTYPE_DB, XML_VERSION

Constructor Summary

ResultCacheColumnUnique(int maxEntries, int pendingTimeout)
Builds a new ResultCache with a column unique granularity.

Method Summary

java.lang.String	getName() Retrieve the name of this cache
boolean	isUpdateNecessary(UpdateRequest request) Returns true if the cache does not contain the values that are given in the update statement.
void	processAddToCache(AbstractResultCacheEntry qe) Process the add to cache to update implementation specific data structures.
protected void	processWriteNotify(AbstractWriteRequest request) Implementation specific invalidation of the cache.

Methods inherited from class org.objectweb.cjdbc.controller.cache.result.ResultCache

addCachingRule, addToCache, commit, flushCache, getCacheData, getCacheSize, getCacheStatistics, getCacheStatsData, getDefaultRule, getEagerCache, getFromCache, getParsingGranularity, getPendingQueryTimeout, getQueries, getRelaxedCache, getXmlImpl, mergeDatabaseSchema, needInvalidate, removeFromCache, removeFromPendingQueries, rollback, setDatabaseSchema, setDefaultRule, setPendingQueryTimeout, shutdown, writeNotify

Methods inherited from class org.objectweb.cjdbc.controller.cache.result.AbstractResultCache

getXml, setParsingGranularity

Methods inherited from class java.lang.Object

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

Constructor Detail

ResultCacheColumnUnique

public ResultCacheColumnUnique(int maxEntries,
                               int pendingTimeout)

Builds a new ResultCache with a column unique granularity.

Parameters:

maxEntries - maximum number of entries

pendingTimeout - pending timeout for concurrent queries

Method Detail

processAddToCache

public void processAddToCache(AbstractResultCacheEntry qe)

Description copied from class: ResultCache

Process the add to cache to update implementation specific data structures.

Specified by:

processAddToCache in class ResultCache

Parameters:

qe - to add to the cache.

See Also:

ResultCache.processAddToCache(AbstractResultCacheEntry)

isUpdateNecessary

public boolean isUpdateNecessary(UpdateRequest request)

Description copied from class: AbstractResultCache

Returns true if the cache does not contain the values that are given in the update statement.

Specified by:

isUpdateNecessary in class ResultCache

See Also:

AbstractResultCache.isUpdateNecessary(org.objectweb.cjdbc.common.sql.UpdateRequest)

processWriteNotify

protected void processWriteNotify(AbstractWriteRequest request)

Description copied from class: ResultCache

Implementation specific invalidation of the cache.

Specified by:

processWriteNotify in class ResultCache

Parameters:

request - Write request that invalidates the cache.

See Also:

ResultCache.processWriteNotify(org.objectweb.cjdbc.common.sql.AbstractWriteRequest)

getName

public java.lang.String getName()

Description copied from class: ResultCache

Retrieve the name of this cache

Specified by:

getName in class ResultCache

Returns:

name

See Also:

ResultCache.getName()