Accessing @Local Session Bean from an exposed RESTeasy interface

What I am trying to do should be very straight forward BUT thus far has been impossible. Can someone tell me how to access a @Local Session Bean from an exposed RESTeasy interface? I have trawled the length and breadth of the internet and all I can find is variations of the same example

I am trying to find out how I can access a session bean in the normal way using RESTeasy. This is what things look like so far:

USING:

EJB 3

RESTeasy 2.1

PUBLISHED EJB INTERFACE:

@Local
@Path("RequestReport")
public interface EReport {

     @GET
     @Produces({"application/xml"})
     @Path("request")
     public String requestReport(@QueryParam("reportId") @DefaultValue("") String reportId,
                                 @QueryParam("reportName") @DefaultValue("") String reportName, 
                                 @QueryParam("reportType") @DefaultValue("") String reportType);

     }
}

BEAN 1:

@Stateless
public class EReportRequest implements EReport {      

     @EJB 
     private ReplyStringLocal replyString; // THIS IS WHERE THE PROBLEM LIES.

     public String requestReport(@QueryParam("reportId") @DefaultValue("") String reportId,
                                 @QueryParam("reportName") @DefaultValue("") String reportName, 
                                 @QueryParam("reportType") @DefaultValue("") String reportType) {     

          return replyString.getReply(reportId, reportName, reportType);        

    }
}

UNPUBLISHED EJB INTERFACE:

@Local
public interface ReplyStringLocal { 

     public String getReply(String reportId, String reportName, String reportType);

}

BEAN 2:

@Stateless
public class ReplyString implements ReplyStringLocal { 

     public String getReply(String reportId, String reportName, String reportType) {

          return "<response><reportId>" + reportId + "</reportId><reportName>" + reportName +
                 "</reportName><reportType>" + reportType + "</reportType></response>";
      } 
}

This example is super simplified for the purposes of demonstrating my issue. Thanks in advance for any help.

For: JBoss 5, RESTeasy 2.1 and EJB 3.

Ok so I finally got the full story on EJBs with RESTeasy. So here it is:

A. You can publish a Session bean with a RESTful interface by giving it RESTeasy path annotation and EJB Session bean annotaion.

INTERFACE:

@Local
@Path("MessageMaker")
public interface MessageMakerLocal {

    @GET
    @Produces({"application/xml"})
    @Path("getMessage")
    public String getMessage(@QueryParam("message") @DefaultValue("") String message);

}

IMPLEMENTATION:

@Stateless
public class MessageMakerImpl implements MessageMakerLocal {

    public String getMessage(@QueryParam("message") @DefaultValue("") String message) {
        return "Your Message: " + message;
    }
}

B. You cannot use @EJB annotation in RESTeasy so using a @Local Session bean reference from a published POJO or published EJB is out of the question. So the example provided in the original post is not valid.

C. To access a Session Bean from published POJOs or published Session Bean, you can use the @Remote interface annotation and JAR your Bean classes. When you are building your EAR file add the JAR to the root of your EAR and add a reference to it in your META-INF/application.xml file.

INTERFACE:

@Remote
public interface MessageMakerRemote {

    public String getMessage(@QueryParam("message") @DefaultValue("") String message);

    }
}

IMPLEMENTATION:

@Stateless
@RemoteBinding(jndiBinding = "MessageMakerRemote")
public class MessageMakerImpl implements MessageMakerRemote {

    public String getMessage(String message) {
        return "Your Message: " + message;
    }
}

In Application.xml:

<module>
    <java>MessageMaker.jar</java>
</module>

You can then make reference to it using a JNDI remote call to your jar:

@Local
@Path("Message")
public class Message {

    @GET
    @Path("requestMessage")
    public String requestMessage(@QueryParam("msg") @DefaultValue("") String msg){

        // I use a custom JNDI remote call handler class so my call to the JARed beans looks like this:
        return JNDIRemote.getRemote(com.message.ejb3.MessageMakerRemote.class).getMessage(msg);
    }
}

I am hoping that later versions of RESTeasy will provide better integration of EJBs.

来源：https://stackoverflow.com/questions/5813898/accessing-local-session-bean-from-an-exposed-resteasy-interface

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