resteasy with seam 2.2 and JBoss 4.2

[arturfriesen]

Im having problems running resteasy with SEAM 2.2.0 ans JBoss AS 4.2.

What i did so far:
added the jaxrs-api.jar to the webcontent-lib directory.
added the jboss-seam-resteasy.jar and resteasy-jaxrs.jar to the EarContent-lib-directory.

After that i had some errors during the start of the JBoss AS.
It was something with java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory

so i added the slf4j-api.jar and slf4j-log4j12.jar also to the EarContent-lib-directory.

After that the JBoss AS started with no problems.

Now im faced with an 404 Error while trying to access the Webservice:

HTTP Status 404 - Could not find resource for relative

My Webservice class looks as following:

package rest;
import javax.ws.rs.*;

@Path("/ping")
public class HelloWorld {

    @GET
    @Produces("text/plain")
    public String get() {
         return "Ping was Successfull";
    }
}

Im trying to reach the webservice over the URL .../seam/resource/rest/ping

does anyone have an idea what im doing wrong??
Im a little bit confused about where to put the JARs and the Webservice-Class.
Maybe i have to put the Webservice-Class so the EJB container??

[arturfriesen]

Finally i got it running, at least the basic example i showed in my first post. Just to note down which combination worked for me,

i created a eclipse WAR-project via jboss-tools with the following settings:

• JBoss AS 4.2.3


• SEAM 2.2.0


• PostgreSQL 8.4.3

after creating the Project i had to add the following JARs to lib folder:

• jboss-seam-resteasy.jar


• jaxrs-api.jar


• resteasy-jaxrs.jar


• slf4j-api.jar


• slf4j-log4j12.jar

[arturfriesen]

If you use the Jboss-Toos in Eclipse to create a SEAM-EAR Project, you have to put the librarys as following:

war-file/WEB-INF/lib:

jboss-seam-resteasy.jar

ear-file/lib:

jaxrs-api.jar resteasy-jaxrs.jar

[arturfriesen]

Im trying to inject EntityManager into the RESTeasy Class,
but this is not working...

is there some configuration needed to inject EntityManager??

[gaborj]

Not sure how far you got, but you should set your class as Seam Component with @Name to inject it.

[arturfriesen]

Meanwhile i switched to the JBossAS 5.1, but it didnt helped me out.
I notated the class with @Name and tried to inject the EntityManager:

import javax.persistence.EntityManager;
import javax.ws.rs.*;

import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;

@Name("ping")
@Path("/ping")
public class HelloWorld {
     
    @In(create=true) EntityManager manager;
     
    @GET
    @Path("/{Number}")
    public String get(@PathParam("Number")String num) {

        return "ping succeeded !!! "+num;
    }
}

If i look at the JBossAS Log, there is the following error after trying to navigae to the REST-URL:

Caused by: java.lang.IllegalArgumentException: Could not set field value by reflection: HelloWorld.manager on: rest2.HelloWorld with value: class org.jboss.seam.faces.FacesManager
     at org.jboss.seam.util.Reflections.set(Reflections.java:86)
     at org.jboss.seam.Component.setFieldValue(Component.java:1923)
     ... 69 more
Caused by: java.lang.IllegalArgumentException: Can not set javax.persistence.EntityManager field rest2.HelloWorld.manager to org.jboss.seam.faces.FacesManager
     at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:146)
     at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:150)
     at sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.java:63)
     at java.lang.reflect.Field.set(Field.java:657)
     at org.jboss.seam.util.Reflections.set(Reflections.java:71)
     ... 70 more

[arturfriesen]

The Problem with the EntityManager injection has seemingly nothing todo with RESTeasy.
I also get this error if i try to onject the EntityManager into the home-class of a created entity.

What could be the reason for such an Error?
Why there is no EntityManager in the context?

[arturfriesen]

finally i found the reason for that behavoir. The following log pointed me to that

15:31:27,776 INFO Component: entityManager, scope: CONVERSATION, type: JAVA_BEAN, class: org.jboss.seam.persistence.ManagedPersistenceContext

SEAM doesnt inject the EntityManager if you declare the @In with another instance-name than entityManager. In my case the following injection doesnt worked because of the instance-name

@In EntityManager manager;

It has to be the following

@In EntityManager entityManager;