java - Where do @Context objects come from -


i've been searching everywhere, can't seem find clear answer...

what mechanism whereby server (glassfish problem) injects actual objets annotated @context? more specifically, if wanted write class did like:

@path("/") public class myresource {   @get   public string dosomething(@context myobject obj) {     // ...   } }

then how it? myobject instanciated, it, , how?

edit: i've seen stuff following:

using @context, @provider , contextresolver in jax-rs

http://jersey.576304.n2.nabble.com/contextresolver-confusion-td5654154.html

however, doesn't square i've seen, e.g. in constructor of org.neo4j.server.rest.web.restfulgraphdatabase, has following signature:

public restfulgraphdatabase(   @context uriinfo uriinfo,   @context database database,   @context inputformat input,   @context outputformat output,   @context leasemanager leasemanager )

you can write own injection provider , plug jersey - @ singletontypeinjectableprovider , perrequesttypeinjectableprovider - extend 1 of these classes (depending on lifecycle want injectable object) , register implementation provider in web app.

for example, this:

@provider public class myobjectprovider extends singletontypeinjectableprovider<context, myobject> {     public myobjectprovider() {         // binds myobject.class single myobject instance         // i.e. instance of myobject created bellow injected if use         // @context myobject myobject         super(myobject.class, new myobject());     } }

to include provider in web app have several options:

  1. if app uses classpath scanning (or package scanning) make sure provider in right package / on classpath
  2. or can register using meta-inf/services entry (add meta-inf/services/com.sun.jersey.spi.inject.injectableprovider file having name of provider class in it's contents)

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