My JSF Books/Videos My JSF Tutorials OmniFaces/JSF PPTs
JSF 2.3 Tutorial
JSF Caching Tutorial
JSF Navigation Tutorial
JSF Scopes Tutorial
JSF Page Author Beginner's Guide
OmniFaces 2.3 Tutorial Examples
OmniFaces 2.2 Tutorial Examples
JSF Events Tutorial
OmniFaces Callbacks Usages
JSF State Tutorial
JSF and Design Patterns
JSF 2.3 New Features (2.3-m04)
Introduction to OmniFaces
25+ Reasons to use OmniFaces in JSF
OmniFaces Validators
OmniFaces Converters
JSF Design Patterns
Mastering OmniFaces
Reusable and less-verbose JSF code

My JSF Resources ...

Java EE Guardian
Member of JCG Program
Member MVB DZone
Blog curated on ZEEF
OmniFaces is an utility library for JSF, including PrimeFaces, RichFaces, ICEfaces ...

[OmniFaces Utilities] - Find the right JSF OmniFaces 2 utilities methods/functions

Search on blog

Petition by Java EE Guardians

Twitter

luni, 9 februarie 2015

[OmniFaces utilities (2.0)] Get the current injection point within a dynamic producer Bean


[OmniFaces utilities] The getCurrentInjectionPoint() gets the current injection point when called from a context where injection is taking place (e.g. from a producer).This is mostly intended to be used from within a dynamic producer Bean. For a "regular" producer (using Produces) an InjectionPoint can either be injected into the bean that contains the producer method, or directly provided as argument of said method.

Method:
Usage:

JSF page
...
<h:body>   
 <h:form>
  <h:commandButton value="BeanA" action="#{beanA.randomNumberA()}"/>
 </h:form>
 <h:form>
  <h:commandButton value="BeanB" action="#{beanB.randomNumberB()}"/>
 </h:form>
</h:body>
...

DynamicProducer (see Dynamic CDI producers, 1 August 2014, by: Arjan Tijms)

import javax.enterprise.inject.spi.InjectionPoint;
import org.omnifaces.util.Beans;

public class DynamicIntegerProducer implements Bean<Integer> {
 ...
 @Override
 public Integer create(CreationalContext<Integer> creationalContext) {
  InjectionPoint injectionPoint = Beans.getCurrentInjectionPoint(creationalContext);
  System.out.println("Current Injection Point: " + injectionPoint);
  // do something with the injection point
  return new Random().nextInt(1000);
 }
 ...
}

BeanA
@Named
@RequestScoped
public class BeanA {

 @Inject
 private Integer rndA;

 public void randomNumberA() {
  System.out.println("Injected random number in BeanA: " + rndA);
 }
}

BeanB
@Named
@RequestScoped
public class BeanB {
   
 @Inject
 private Integer rndB;
    
 public void randomNumberB() {
  System.out.println("Injected random number in BeanB: " + rndB);
 }   
}

Now, press button BeanA and afterwards button, BeanB. You will see this output:

Current Injection Point: [BackedAnnotatedField] @Inject private some.beans.BeanA.rndA
Injected random number in BeanA: 538
Current Injection Point: [BackedAnnotatedField] @Inject private some.beans.BeanB.rndB
Injected random number in BeanB: 266

API GH-SOURCE GH-EXAMPLE[CDIDynamicProducer]

Niciun comentariu :

Trimiteți un comentariu

JSF BOOKS COLLECTION

Postări populare

OmniFaces/JSF Fans

Follow by Email

Visitors Starting 4 September 2015

Locations of Site Visitors