Minimal jaxrs setup

Resource.java

import javax.persistence.*;

@Entity
public class Resource
{
	@Id
	private int id;
	private String value;
	
	public int getId()
	{
		return id;
	}

	public void setId(int id)
	{
		this.id = id;
	}
	
	public int getValue()
	{
		return value;
	}

	public void setValue(String value)
	{
		this.value = value;
	}


}

ResourceService.java

import javax.persistence.EntityManager;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.PersistenceContext;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.util.Arrays;

/**
 * JAXRS Service class.
 * URL: /<mod name>/resources/resource/*
 */
@Path("/resource")
public class ResourceService
{
	@PersistenceContext(unitName = "DSName")
	private EntityManager em;

	@GET
	@Path("/{id}")
	@Produces(MediaType.APPLICATION_JSON)
	public Response getPerson(@PathParam("id") int id)
	{
		return Response.ok().entity(em.find(Resource.class, id)).build();
	}

	@POST
	@Path("/")
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	public Response createPerson(Resource resource)
	{
		try
		{
			return Response.ok().entity(em.persist(resource)).build();
		}
		catch (IllegalAccessException e)
		{
			return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(e.getMessage()).build();
		}
	}

	@PUT
	@Path("/{id}")
	@Consumes(MediaType.APPLICATION_JSON)
	@Produces(MediaType.APPLICATION_JSON)
	public Response updatePerson(@PathParam("id") int id, Reource resource)
	{
		// Retrieve the original entity first.
		Resource original = em.find(Resource.class, id);
		if (original == null)
		{
			return Response.status(Response.Status.NOT_FOUND).build();
		}
		try
		{
			return Response.ok().entity(em.merge(resource)).build();
		}
		catch (IllegalAccessException e)
		{
			e.printStackTrace();
			return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
		}
	}

}

RestConfig.java

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

/**
 * JAXRS configuration class.
 */
@ApplicationPath("/resources")
public class RestConfig extends Application
{
	public Set<Class<?>> getClasses()
	{
		return new HashSet<Class<?>>(Arrays.asList(ResourceService.class));
	}
}