EJB Object Null Pointer Exception Inside JAX-WS Web Service

[peter wong ka chon]

Hello to all, I'm tried to develop a web service application that utilize EJB function inside web service class but the EJB object is null during run time.

I'm configure the web service using Spring Application Context. Is there any problem with it?

Code:

public class CreditCardService implements ICreditCardService {

  private static final Logger logger = Logger.getLogger(CreditCardService.class.getName());
  
  @EJB
  private CreditcardFacadeLocal databaseFacade;
  
  @Override
  public void addCreditCard(Creditcard card) {
    logger.log(Level.INFO, "Add credit card start");
    databaseFacade.addCreditCard(card); // NPE Here
    logger.log(Level.INFO, "Add create card finish");
  }
}

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
	
	<display-name>CreditCardWebService</display-name>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>WEB-INF/beans.xml</param-value>
	</context-param>
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<servlet>
		<description>Apache CXF Endpoint</description>
		<display-name>cxf</display-name>
		<servlet-name>cxf</servlet-name>
		<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
		<enabled>true</enabled>
		<async-supported>false</async-supported>
	</servlet>
	<servlet-mapping>
		<servlet-name>cxf</servlet-name>
		<url-pattern>
		/services/*</url-pattern>
	</servlet-mapping>
	<session-config>
		<session-timeout>60</session-timeout>
	</session-config>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
		<welcome-file>index.htm</welcome-file>
		<welcome-file>index.jsp</welcome-file>
		<welcome-file>default.html</welcome-file>
		<welcome-file>default.htm</welcome-file>
		<welcome-file>default.jsp</welcome-file>
	</welcome-file-list>
</web-app>

Beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jaxws="http://cxf.apache.org/jaxws"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd">
	<import resource="classpath:META-INF/cxf/cxf.xml" />
	<!--  <import resource="classpath:META-INF/cxf/cxf-extension-soap.xml" /> -->
	<import resource="classpath:META-INF/cxf/cxf-servlet.xml" />
	
	<!-- Create Web Service End Point using Spring DI-->
	<jaxws:endpoint xmlns:tns="http://service.peter.com/"
		id="creditcardservice" implementor="com.peter.service.CreditCardService"
		wsdlLocation="wsdl/creditcardservice.wsdl" endpointName="tns:CreditCardServicePort"
		serviceName="tns:CreditCardServiceService" address="/CreditCardServicePort">
		<jaxws:features>
			<bean class="org.apache.cxf.feature.LoggingFeature" />
		</jaxws:features>
	</jaxws:endpoint>
</beans>

What is the reason the ejb ojbect is null? Is it relate to Spring DI of CreditCardService class but does not instantiate the ejb object?

What is the purpose of CXF servlet? Is it use to handle web service request?

Please help.

Thanks.