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. It could be architected in the future to add more cache implementations besides OSCache.

Author:

Igor Polevoy

Enum Constant Summary

INSTANCE

Method Summary

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.
void	purgeTableCache(String tableName) 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

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(String tableName)

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

Parameters:

tableName - table name whose caches are to be purged.

getCacheManager

public CacheManager getCacheManager()