org.glassfish.jersey

Class InjectionManagerProvider

java.lang.Object

org.glassfish.jersey.InjectionManagerProvider

Direct Known Subclasses:

InjectionManagerClientProvider

public class InjectionManagerProvider
extends Object

Utility class with static methods that extract injection manager from various JAX-RS components. This class can be used when no injection is possible by Context or Inject annotation due to character of provider but there is a need to get any service from InjectionManager.

Injections are not possible for example when a provider is registered as an instance on the client. In this case the runtime will not inject the instance as this instance might be used in other client runtimes too.

Example. This is the class using a standard injection:

     public static class MyWriterInterceptor implements WriterInterceptor {
         @Inject
         MyInjectedService service;

         @Override
         public void aroundWriteTo(WriterInterceptorContext context) throws IOException, WebApplicationException {
             Something something = service.getSomething();
             ...
         }

     }
 

If this injection is not possible then this construct can be used:

     public static class MyWriterInterceptor implements WriterInterceptor {

         @Override
         public void aroundWriteTo(WriterInterceptorContext context) throws IOException, WebApplicationException {
             InjectionManager injectionManager = InjectionManagerProvider.getInjectionManager(context);
             MyInjectedService service = injectionManager.getInstance(MyInjectedService.class);
             Something something = service.getSomething();
             ...
         }
     }
 

Note, that this injection support is intended mostly for injection of custom user types. JAX-RS types are usually available without need for injections in method parameters. However, when injection of custom type is needed it is preferred to use standard injections if it is possible rather than injection support provided by this class.

User returned InjectionManager only for purpose of getting services (do not change the state of the injection manager).

Since:

2.6

Author:

Miroslav Fuksa

Constructor Summary

Constructors

Constructor and Description
InjectionManagerProvider()

Method Summary

Modifier and Type	Method and Description
static org.glassfish.jersey.internal.inject.InjectionManager	getInjectionManager(FeatureContext featureContext) Extract and return injection manager from featureContext.
static org.glassfish.jersey.internal.inject.InjectionManager	getInjectionManager(ReaderInterceptorContext readerInterceptorContext) Extract and return injection manager from readerInterceptorContext.
static org.glassfish.jersey.internal.inject.InjectionManager	getInjectionManager(WriterInterceptorContext writerInterceptorContext) Extract and return injection manager from writerInterceptorContext.

Methods inherited from class java.lang.Object

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

Constructor Detail

InjectionManagerProvider

public InjectionManagerProvider()

Method Detail

getInjectionManager

public static org.glassfish.jersey.internal.inject.InjectionManager getInjectionManager(WriterInterceptorContext writerInterceptorContext)

Extract and return injection manager from writerInterceptorContext. The method can be used to inject custom types into a WriterInterceptor.

Parameters:

writerInterceptorContext - Writer interceptor context.

Returns:

injection manager.

Throws:

IllegalArgumentException - when writerInterceptorContext is not a default Jersey implementation provided by Jersey as argument in the WriterInterceptor.aroundWriteTo(javax.ws.rs.ext.WriterInterceptorContext) method.

getInjectionManager

public static org.glassfish.jersey.internal.inject.InjectionManager getInjectionManager(ReaderInterceptorContext readerInterceptorContext)

Extract and return injection manager from readerInterceptorContext. The method can be used to inject custom types into a ReaderInterceptor.

Parameters:

readerInterceptorContext - Reader interceptor context.

Returns:

injection manager.

Throws:

IllegalArgumentException - when readerInterceptorContext is not a default Jersey implementation provided by Jersey as argument in the ReaderInterceptor.aroundReadFrom(javax.ws.rs.ext.ReaderInterceptorContext) method.

getInjectionManager

public static org.glassfish.jersey.internal.inject.InjectionManager getInjectionManager(FeatureContext featureContext)

Extract and return injection manager from featureContext. The method can be used to inject custom types into a Feature.

Note that features are utilized during initialization phase when not all providers are registered yet. It is undefined which injections are already available in this phase.

Parameters:

featureContext - Feature context.

Returns:

injection manager.

Throws:

IllegalArgumentException - when writerInterceptorContext is not a default Jersey instance provided by Jersey in Feature.configure(javax.ws.rs.core.FeatureContext) method.