info.magnolia.registry
Class RegistryMap<K,V>

java.lang.Object
  info.magnolia.registry.RegistryMap<K,V>

Type Parameters:

K - the type of keys maintained by this map

V - the type of mapped values

public class RegistryMap<K,V>
extends Object

Thread safe map intended to be used for registries. Provides an atomic operation removeAndPutAll that is used to remove a set of previously added values before adding a collection of new ones. Read operations are blocked until it completes guaranteeing proper visibility.

It is common for entities in registries to also hold their identifier. The method keyFormValue can be overridden to get the identifier from the value. This removes the need to package a set of entities that should be added in a Map before calling removeAndPutAll(java.util.Collection, java.util.Map).

Version:

$Id$

Constructor Summary

RegistryMap()

Method Summary

V	get(K key)
V	getRequired(K key)
protected K	keyFromValue(V value)
Collection<K>	keySet()
void	put(K key, V value)
void	put(V value)
void	remove(K key)
Set<K>	removeAndPutAll(Collection<K> toRemove, Collection<V> toPut)
void	removeAndPutAll(Collection<K> toRemove, Map<K,V> toPut)
Collection<V>	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

RegistryMap

public RegistryMap()

Method Detail

get

public V get(K key)

getRequired

public V getRequired(K key)
              throws RegistrationException

Throws:

RegistrationException

put

public void put(K key,
                V value)

put

public void put(V value)

remove

public void remove(K key)

removeAndPutAll

public void removeAndPutAll(Collection<K> toRemove,
                            Map<K,V> toPut)

removeAndPutAll

public Set<K> removeAndPutAll(Collection<K> toRemove,
                              Collection<V> toPut)

keySet

public Collection<K> keySet()

values

public Collection<V> values()

keyFromValue

protected K keyFromValue(V value)