8:46 p.m.
Hi folks,
I am new to EJB and statefull sessin beans on JBoss4.2 AS
I have the following urgent problem:
I have the following statefull session bean.
| @Stateful
| public class PlaceOrderBean implements PlaceOrder {
| private ShippingInfo shippingInfo;
| private BillingInfo billingInfo;
|
| public void setShippingInfo(ShippingInfo shippingInfo) {
| System.out.println("Call # : 1 " );
| this.shippingInfo = shippingInfo;
| }
|
| public void setBillingInfo(BillingInfo billingInfo) {
| System.out.println("Call # : 2 " );
| this.billingInfo = billingInfo;
| System.out.println(shippingInfo.getShippingInfo()); // <<
NullPointerException here !!!!! how come ??!!
| }
| }
|
The client :
| // this class is a JSF managed bean that is used with 2 JSPs, each one of the two
calles on of the below methods
| public class OrderItemBean {
| private PlaceOrder placeOrder;
|
| public OrderItemBean() {
| try {
| logger.info("Getting PlaceOrder instance ...");
| InitialContext ctx = new InitialContext();
| placeOrder = (PlaceOrder) ctx.lookup("chapter2/" +
PlaceOrderBean.class.getSimpleName() + "/local");
| }catch(NamingException ex) {
| ex.printStackTrace();
| }
| }
| // Note, the class OrderItemBean get instantiated a new instance before
calling the following method
| // so, the JNDI code in the constructor above is being called to lookup the
statefull bean
| public String setShippingInfo() {
| ShippingInfo shipInfo = new ShippingInfo();
| shipInfo.setShippingInfo(getShippingInfoTxt().getValue().toString());
| placeOrder.setShippingInfo(shipInfo);
|
| System.out.println("shipping Info : " + shipInfo.getShippingInfo());
|
| return SUCCESS + "_setShippingInfo";
| }
| // Note, the class OrderItemBean get instantiated a new instance before
calling the following method
| // so, the JNDI code in the constructor above is being called again to lookup
the statefull bean
| public String setBillingInfo() {
| BillingInfo billingInfo = new BillingInfo();
| billingInfo.setBillingInfo(getBillingInfoTxt().getValue().toString());
| placeOrder.setBillingInfo(billingInfo);
|
| setAdditionalInfo();
|
| return SUCCESS + "_setBillingInfo";
| }
|
| }
The code above get this exception
03:06:35,264 INFO [OrderItemBean] Getting PlaceOrder instance ...
| 03:06:35,274 INFO [STDOUT] Call # : 1
| 03:06:35,274 INFO [STDOUT] shipping Info : Cairo, Egypt, Elobour city
| 03:06:36,919 INFO [OrderItemBean] Getting PlaceOrder instance ...
| 03:06:36,929 INFO [STDOUT] Call # : 2
| 03:06:36,930 FATAL [application] javax.ejb.EJBException:
java.lang.NullPointerException
| javax.faces.el.EvaluationException: javax.ejb.EJBException:
java.lang.NullPointerException
| at
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
| at
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
| at javax.faces.component.UICommand.broadcast(UICommand.java:383)
| at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447)
| at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
| at
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
| at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
| at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
| at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
| at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
| at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
| at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
| at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
| at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
| at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
| at
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
| at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
| at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
| at java.lang.Thread.run(Thread.java:619)
|
| .............
| ..............
|
How this come, Ain't it as stateFULL session bean !!!!!!
Please Help
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