package myapp.security;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

import org.jboss.seam.annotations.security.management.RoleName;

@Entity
public class Role {
    private Integer id;
    private String rolename;

    @Id
    @GeneratedValue
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }

    @RoleName
    public String getRolename() {
        return rolename;
    }
    public void setRolename(String rolename) {
        this.rolename = rolename;
    }
}

Problem starting service persistence.units:ear=myapp-1.0-SNAPSHOT.ear,unitName=myappDatabase
org.hibernate.AnnotationException: No identifier specified for entity: myapp.security.Role