Package org.javalite.activejdbc.cache

Enum QueryCache

java.lang.Object

java.lang.Enum<QueryCache>

org.javalite.activejdbc.cache.QueryCache

All Implemented Interfaces:

Serializable, Comparable<QueryCache>

public enum QueryCache
extends Enum<QueryCache>

This is a main cache facade.

Author:

Igor Polevoy

Enum Constant Summary

Enum Constants

Enum Constant	Description
INSTANCE

Method Summary

Modifier and Type	Method	Description
void	addItem(String tableName, String query, Object[] params, Object cache)	Adds an item to cache.
CacheManager	getCacheManager()
Object	getItem(String tableName, String query, Object[] params)	Returns an item from cache, or null if nothing found.
static QueryCache	instance()	This class is a singleton, get an instance with this method.
boolean	isEnabled()
void	purgeTableCache(String tableName)	Use purgeTableCache(MetaModel) whenever you can.
void	purgeTableCache(MetaModel metaModel)	This method purges (removes) all caches associated with a table, if caching is enabled and a corresponding model is marked cached.
static QueryCache	valueOf(String name)	Returns the enum constant of this type with the specified name.
static QueryCache[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

INSTANCE

public static final QueryCache INSTANCE

Method Detail

values

public static QueryCache[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (QueryCache c : QueryCache.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static QueryCache valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

isEnabled

public boolean isEnabled()

instance

public static QueryCache instance()

This class is a singleton, get an instance with this method.

Returns:

one and only one instance of this class.

addItem

public void addItem(String tableName,
                    String query,
                    Object[] params,
                    Object cache)

Adds an item to cache. Expected some lists of objects returned from "select" queries.

Parameters:

tableName - - name of table.

query - query text

params - - list of parameters for a query.

cache - object to cache.

getItem

public Object getItem(String tableName,
                      String query,
                      Object[] params)

Returns an item from cache, or null if nothing found.

Parameters:

tableName - name of table.

query - query text.

params - list of query parameters, can be null if no parameters are provided.

Returns:

cache object or null if nothing found.

purgeTableCache

public void purgeTableCache(MetaModel metaModel)

This method purges (removes) all caches associated with a table, if caching is enabled and a corresponding model is marked cached.

Parameters:

metaModel - meta-model whose caches are to purge.

purgeTableCache

public void purgeTableCache(String tableName)

Use purgeTableCache(MetaModel) whenever you can.

Parameters:

tableName - name of table whose caches to purge.

getCacheManager

public CacheManager getCacheManager()