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POInjecting a Logger into an Ejb using CDI
 

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    <p>I'm struggling a bit to put together what I thought was a simple task. I have a Stateless Singleton Bean, that I'm going to use as a "loader" for my app. The bean is included in a Jar (loader.jar) file and resides in the lib folder of my EAR.</p> <p>In the root of the EAR resides another jar, containing the implementation of a Stateless Session Bean that is going to be used by my application.</p> <p>Then I've created a small logger class, which actually wraps log4j:</p> <pre><code> import javax.annotation.PostConstruct; import javax.annotation.PreDestroy; import javax.enterprise.context.RequestScoped; import javax.enterprise.inject.Produces; import javax.enterprise.inject.spi.InjectionPoint; import javax.inject.Named; import org.apache.log4j.Logger; public class LoggerFactory { private Logger logger; public LoggerFactory(){ logger = Logger.getLogger(this.getClass().getName()); } @Produces Logger getLogger(InjectionPoint caller){ return Logger.getLogger(caller.getMember().getDeclaringClass().getName()); } } </code></pre> <p>Then I've placed this inside a jar, that I've named as utils.jar. In this jar, following CDI specifications, I've created inside the META-INF folder an empty beans.xml file. The utils.jar resides in the lib folder of my EAR.</p> <p>Now, in the stateless Singleton Bean I've mentioned before (the loader)</p> <p>I've wrote just this</p> <pre><code> import javax.annotation.PostConstruct; import javax.ejb.Singleton; import javax.ejb.Startup; import javax.inject.Inject; import org.apache.log4j.Logger; @Startup @Singleton public class Core { @Inject private Logger logger; @PostConstruct void init(){ logger.info("Core started"); } } </code></pre> <p>when I deploy my app on glassfish 3.1.2 I get a plain NPE at the first invocation of logger in my Loader bean. This makes me think that CDI invocation is not happening at all, but I sincerely cannon understand what I'm doing wrong.</p> <p>So far my EAR structure is as follows:</p> <pre><code> EAR | +---lib | +--loader.jar | +--utils.jar | +--log4j.xx.jar | +--MyStatelessSessionBean.jar </code></pre> <p>Thanks a lot for your help </p>
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