@Named annotation can't load a bean in a Servlet - javax.naming.NameNotFoundException: Name student is not bound in this Context

Question

I originally used @Component for a bean(Student.java) that is being called in a Servlet. I changed @Component to @Named. I used to use following code to get the student bean in the Servlet.

Student student = (Student)applicationContext.getBean("student")

After I changed to @Named, the bean is no longer being detected. I am getting following error messages. Could anyone tell me what is the problem? I placed javax.inject-1.jar file under webapps\student-enrollment\WEB-INF\lib\

Context init...
Logger name for context: student-enrollment
Context logger config file: logback-student-enrollment.xml
Adding logger context: student-enrollment to map for context: student-enrollment
2014-09-10 20:46:19.361 Servlet /student-enrollment threw load() exception
javax.naming.NameNotFoundException: Name student is not bound in this Context
        at org.apache.naming.NamingContext.lookup(NamingContext.java:770) ~[catalina-6.0.36.jar:6.0.36]
        at org.apache.naming.NamingContext.lookup(NamingContext.java:153) ~[catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.util.DefaultAnnotationProcessor.lookupFieldResource(DefaultAnnotationProcessor.java:276) ~[catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.util.DefaultAnnotationProcessor.processAnnotations(DefaultAnnotationProcessor.java:187) ~[catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1153) ~[catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1026) ~[catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4421) [catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4734) [catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) [catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) [catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) [catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) [catalina-6.0.36.jar:6.0.36]
        at org.apache.catalina.startup.Embedded.start(Embedded.java:825) [catalina-6.0.36.jar:6.0.36]
        at org.red5.server.tomcat.TomcatLoader.init(TomcatLoader.java:517) [tomcatplugin-1.3.jar:na]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_43]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_43]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_43]
        at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_43]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java
:1581) [spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1522
) [spring-beans-3.1.1.RELEASE.jar:3.1.1.RELEASE]

EDIT 1

Here is part of my Student.java and StudentEnrollmentServlet class.

@Named(Student.NAMED)
public class Student {


    public static final String NAMED = "student";

    .......

}

@Named(StudentEnrollmentServlet.NAMED)
public class StudentEnrollmentServlet extends HttpServlet {

    public static final String NAMED = "StudentEnrollmentServlet";


    @Resource(name = Student.NAMED)
    private Student student;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
                     throws ServletException, IOException {

        processRequest(request, response);
    }

    .......
}

Check this maybe it will help you http://www.mkyong.com/spring3/spring-3-and-jsr-330-inject-and-named-example/ — Gas, Sep 11 '14 at 01:59
Thanks for the link. I compared it with my implementation, but I still couldn't find the cause. I didn't have problem with @Named with other environments that I have worked on. — user3123690, Sep 11 '14 at 15:12

score 0 · Answer 1 · answered Sep 10 '14 at 16:50

0

It looks like you will need give the bean a name

@Named("student")

answered Sep 10 '14 at 16:50

Dino Tw

3,167
4
34
48

@Named annotation can't load a bean in a Servlet - javax.naming.NameNotFoundException: Name student is not bound in this Context

1 Answers1