org.simpleds.cache
Class NullCacheManagerImpl

java.lang.Object
  org.simpleds.cache.NullCacheManagerImpl

All Implemented Interfaces:

CacheManager

public class NullCacheManagerImpl
extends java.lang.Object
implements CacheManager

A non-caching CacheManager implementation. Using this class will effectively disable caching.

Field Summary

Fields inherited from interface org.simpleds.cache.CacheManager

MEMCACHE_NAMESPACE

Constructor Summary

NullCacheManagerImpl()

Method Summary

void	delete(java.util.Collection<? extends java.io.Serializable> keys) Delete contents from the cache
void	delete(com.google.appengine.api.datastore.Key key) Remove an entity from the cache
<T> T	get(com.google.appengine.api.datastore.Key key, ClassMetadata metadata) Check the level 1 and level 2 cache for the required value.
java.util.Map<com.google.appengine.api.datastore.Key,java.lang.Object>	get(com.google.common.collect.Multimap<ClassMetadata,com.google.appengine.api.datastore.Key> keys) Retrieve a set of entities from the cache
<T> T	get(java.lang.String key) Return the cached query data, if available
void	put(com.google.common.collect.ListMultimap<ClassMetadata,java.lang.Object> javaObjects, com.google.common.collect.ListMultimap<ClassMetadata,com.google.appengine.api.datastore.Entity> dsEntities) Put a collection of java objects in the cache
void	put(java.lang.Object instance, com.google.appengine.api.datastore.Entity entity, ClassMetadata metadata) Put an instance in the cache
void	put(java.lang.String cacheKey, java.lang.Object value, int seconds) Store query data into the cache

Methods inherited from class java.lang.Object

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

Constructor Detail

NullCacheManagerImpl

public NullCacheManagerImpl()

Method Detail

delete

public void delete(com.google.appengine.api.datastore.Key key)

Description copied from interface: CacheManager

Remove an entity from the cache

Specified by:

delete in interface CacheManager

Parameters:

key - the key to remove

get

public <T> T get(com.google.appengine.api.datastore.Key key,
                 ClassMetadata metadata)

Description copied from interface: CacheManager

Check the level 1 and level 2 cache for the required value. If the value is found in Level 1 cache, it is returned as is. Otherwise, the Level 2 cache will be queried for the value. If found, the value will be injected into Level 1 and returned. If the value is not found in Level 1 or Level2, this method will return null.

Specified by:

get in interface CacheManager

Parameters:

key - the key of the persistent entity to return

Returns:

the cached value, or null if not found.

put

public void put(java.lang.Object instance,
                com.google.appengine.api.datastore.Entity entity,
                ClassMetadata metadata)

Description copied from interface: CacheManager

Put an instance in the cache

Specified by:

put in interface CacheManager

Parameters:

instance - the java object

entity - the datastore-equivalent Entity instance

metadata - the ClassMetadata instance for this entity

delete

public void delete(java.util.Collection<? extends java.io.Serializable> keys)

Description copied from interface: CacheManager

Delete contents from the cache

Specified by:

delete in interface CacheManager

Parameters:

keys - the keys to remove

get

public <T> T get(java.lang.String key)

Description copied from interface: CacheManager

Return the cached query data, if available

Specified by:

get in interface CacheManager

Parameters:

key - the key to retrieve

Returns:

the cached query data, null if not cached

put

public void put(java.lang.String cacheKey,
                java.lang.Object value,
                int seconds)

Description copied from interface: CacheManager

Store query data into the cache

Specified by:

put in interface CacheManager

Parameters:

cacheKey - the key of the query

value - the value to store

seconds - the number of seconds to store in the cache, 0 to use only the Level 1 cache

get

public java.util.Map<com.google.appengine.api.datastore.Key,java.lang.Object> get(com.google.common.collect.Multimap<ClassMetadata,com.google.appengine.api.datastore.Key> keys)

Description copied from interface: CacheManager

Retrieve a set of entities from the cache

Specified by:

get in interface CacheManager

Parameters:

keys - the keys to retrieve from the cache

Returns:

a Map of retrieved persistent entities.

put

public void put(com.google.common.collect.ListMultimap<ClassMetadata,java.lang.Object> javaObjects,
                com.google.common.collect.ListMultimap<ClassMetadata,com.google.appengine.api.datastore.Entity> dsEntities)

Description copied from interface: CacheManager

Put a collection of java objects in the cache

Specified by:

put in interface CacheManager

Parameters:

javaObjects - the persistent objects to put into the Level 1 cache

dsEntities - the list of entities to put into the Level 2 cache