org.ops4j.peaberry.cache
Class RegistryChain

java.lang.Object
  org.ops4j.peaberry.cache.RegistryChain

All Implemented Interfaces:

ServiceRegistry, ServiceWatcher<Object>

public class RegistryChain
extends Object
implements ServiceRegistry

A ServiceRegistry that delegates to a series of other registries.

Author:

mcculls@gmail.com (Stuart McCulloch)

Constructor Summary

RegistryChain(ServiceRegistry mainRegistry, ServiceRegistry[] extraRegistries)

Method Summary

<T> Export<T>	add(Import<T> service) Add the given service to this watcher.
boolean	equals(Object rhs)
int	hashCode()
<T> Iterable<Import<T>>	lookup(Class<T> clazz, AttributeFilter filter) Lookup services from the registry, constrained by the given filter.
String	toString()
<T> void	watch(Class<T> clazz, AttributeFilter filter, ServiceWatcher<? super T> watcher) Watch for services in the registry, constrained by the given filter.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

RegistryChain

@Inject
public RegistryChain(ServiceRegistry mainRegistry,
                            ServiceRegistry[] extraRegistries)

Method Detail

lookup

public final <T> Iterable<Import<T>> lookup(Class<T> clazz,
                                            AttributeFilter filter)

Description copied from interface: ServiceRegistry

Lookup services from the registry, constrained by the given filter.

Specified by:

lookup in interface ServiceRegistry

Parameters:

clazz - expected service interface

filter - service attribute filter

Returns:

ordered sequence of imported services, most recommended first

watch

public final <T> void watch(Class<T> clazz,
                            AttributeFilter filter,
                            ServiceWatcher<? super T> watcher)

Description copied from interface: ServiceRegistry

Watch for services in the registry, constrained by the given filter.

Specified by:

watch in interface ServiceRegistry

Parameters:

clazz - expected service interface

filter - service attribute filter

watcher - the watcher that should receive any matching services

add

public final <T> Export<T> add(Import<T> service)

Description copied from interface: ServiceWatcher

Add the given service to this watcher.

Specified by:

add in interface ServiceWatcher<Object>

Parameters:

service - imported service handle

Returns:

exported service handle, null if the watcher is not interested

toString

public final String toString()

Overrides:

toString in class Object

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

equals

public final boolean equals(Object rhs)

Overrides:

equals in class Object