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Error displaying message on JSF

 
Mary Koh
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Posts: 33
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Hi,

I am trying to display messages but the getFacesContext() hits null. I am unsure why is this so.



[4/24/12 12:45:58:861 SGT] 00000026 SystemOut O 1.0 getFacesContext():null
[4/24/12 12:45:58:861 SGT] 00000026 jsf E com.sun.faces.lifecycle.InvokeApplicationPhase execute #{pc_Login.doLogin_loginAction}: javax.faces.el.EvaluationException: java.lang.NullPointerException
javax.faces.FacesException: #{pc_Login.doLogin_loginAction}: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:79)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:302)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:419)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:239)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1146)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:593)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:535)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:764)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1478)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:133)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:450)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:508)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:296)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:270)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:196)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:751)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:881)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1551)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:131)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:73)
... 28 more
Caused by: java.lang.NullPointerException
at pagecode.PageCodeBase.showCommonMessage(PageCodeBase.java:102)
at pagecode.PageCodeBase.showCommonMessage_ByKey(PageCodeBase.java:51)
at pagecode.Login.doLogin_loginAction(Login.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:127)
... 29 more

[4/24/12 12:45:58:867 SGT] 00000026 ServletWrappe E SRVE0068E: Uncaught exception thrown in one of the service methods of the servlet: Faces Servlet. Exception thrown : javax.servlet.ServletException: #{pc_Login.doLogin_loginAction}: javax.faces.el.EvaluationException: java.lang.NullPointerException
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:209)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1146)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:593)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:535)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:764)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1478)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:133)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:450)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:508)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:296)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:270)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:196)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:751)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:881)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1551)
---- Begin backtrace for Nested Throwables
javax.faces.FacesException: #{pc_Login.doLogin_loginAction}: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:79)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:302)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:419)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:239)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1146)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:593)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:535)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:764)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1478)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:133)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:450)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:508)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:296)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:270)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:196)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:751)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:881)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1551)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:131)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:73)
... 28 more
Caused by: java.lang.NullPointerException
at pagecode.PageCodeBase.showCommonMessage(PageCodeBase.java:102)
at pagecode.PageCodeBase.showCommonMessage_ByKey(PageCodeBase.java:51)
at pagecode.Login.doLogin_loginAction(Login.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:127)
... 29 more

[4/24/12 12:45:58:870 SGT] 00000026 WebApp E [Servlet Error]-[Faces Servlet]: javax.faces.FacesException: #{pc_Login.doLogin_loginAction}: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:79)
at javax.faces.component.UICommand.broadcast(UICommand.java:312)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:302)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:419)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:239)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1146)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:593)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:535)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:764)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1478)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:133)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:450)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:508)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:296)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:270)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:196)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:751)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:881)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1551)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:131)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:73)
... 28 more
Caused by: java.lang.NullPointerException
at pagecode.PageCodeBase.showCommonMessage(PageCodeBase.java:102)
at pagecode.PageCodeBase.showCommonMessage_ByKey(PageCodeBase.java:51)
at pagecode.Login.doLogin_loginAction(Login.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:618)
at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:127)
... 29 more

 
Tim Holloway
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FacesContext is not an enduring object. It is created and destroyed on each HTTP service request that is channeled to the FacesServlet (that is, the request is a JSF request). If you URL is non-JSF, such as a JSP or servlet URL, the request doesn't get routed to FacesServlet, no FacesContext is created and null is exactly what you'll get.

I could rant on at length about the perils of writing your own login processes, but I'll save that for another time.
 
Mary Koh
Ranch Hand
Posts: 33
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Tim Holloway wrote:FacesContext is not an enduring object. It is created and destroyed on each HTTP service request that is channeled to the FacesServlet (that is, the request is a JSF request). If you URL is non-JSF, such as a JSP or servlet URL, the request doesn't get routed to FacesServlet, no FacesContext is created and null is exactly what you'll get.

I could rant on at length about the perils of writing your own login processes, but I'll save that for another time.


Thanks! Fixed it!
 
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