org.wicketstuff.osgi.inject

Class OsgiComponentInjector

java.lang.Object

org.apache.wicket.injection.Injector

org.wicketstuff.osgi.inject.OsgiComponentInjector

All Implemented Interfaces:

org.apache.wicket.application.IComponentInstantiationListener

public class OsgiComponentInjector
extends org.apache.wicket.injection.Injector
implements org.apache.wicket.application.IComponentInstantiationListener

A hook for injecting OSGi services into Wicket components. This class performs field injection for all component fields annotated by @javax.inject.Inject by looking up a service of the required type from the OSGi service registry.

To enable this mechanism, register the injection in your Application.init() method like this:

 getComponentInstantiationListeners().add(new OsgiComponentInjector());
 

By default, injected services are wrapped in a proxy to take care of class loading issues when deserializing a component from the page store. On serialization, the proxy replaces the wrapped service (which may not be serializable itself) by a serializable reference (its interface name, essentially). On deserialization, the proxy retrieves the matching service from the OSGi service registry.

TODO Injection is not deterministic when there is more than one service of the required type. This class should be extended to disambiguate candidate services either by a @Named qualifier or by a dedicated qualifier taking service properties as parameters.

Author:

Harald Wellmann

Constructor Summary

Constructors

Constructor and Description
OsgiComponentInjector()
OsgiComponentInjector(boolean wrapInProxies)

Method Summary

Methods

Modifier and Type	Method and Description
void	inject(Object object)
void	onInstantiation(org.apache.wicket.Component component)

Methods inherited from class org.apache.wicket.injection.Injector

bind, get, inject

Methods inherited from class java.lang.Object

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

Constructor Detail

OsgiComponentInjector

public OsgiComponentInjector()

OsgiComponentInjector

public OsgiComponentInjector(boolean wrapInProxies)

Method Detail

inject

public void inject(Object object)

Specified by:

inject in class org.apache.wicket.injection.Injector

onInstantiation

public void onInstantiation(org.apache.wicket.Component component)

Specified by:

onInstantiation in interface org.apache.wicket.application.IComponentInstantiationListener