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POHow to use FacesContext.getCurrentInstance(), it returns null
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  1. POHow to use FacesContext.getCurrentInstance(), it returns null
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    copied!<p>I've been struggling for the last couple of days with the login part of my web app. I've gotten to the point where I can succesfully authenticate a user using the JDBCRealm on tomcat(by reading users from a sql server database). Now <strong>I want to send some kind of feedback</strong> when the user's account has been blocked, or when the credentials are incorrect, this is where I'm stuck now.</p> <p>I wanted to use this:</p> <pre><code> try { request.login(request.getParameter("user"), request.getParameter("pass")); } catch (ServletException se) { FacesContext.getCurrentInstance().addMessage(null, new FacesMessage("Wrong Username/Password combination")); log(se.getMessage()); } </code></pre> <p>But FacesContext.getCurrentInstance() always returns null..</p> <p>After doing some research I found out that the request must come from a page located in /faces so that the FacesServlet gets called and the FacesContext gets initialized(at least that's what I understood).</p> <p>So I moved the login page to a new folder named faces, inside the Web Pages folder. But now everytime I try to call the login.xhtml page, I get this error:</p> <pre><code>/login.xhtml Not Found in ExternalContext as a Resource </code></pre> <p>And this is the stacktrace:</p> <pre><code>com.sun.faces.context.FacesFileNotFoundException: /login.xhtml Not Found in ExternalContext as a Resource at com.sun.faces.facelets.impl.DefaultFaceletFactory.resolveURL(DefaultFaceletFactory.java:232) at com.sun.faces.facelets.impl.DefaultFaceletFactory.resolveURL(DefaultFaceletFactory.java:273) at com.sun.faces.facelets.impl.DefaultFaceletFactory.getFacelet(DefaultFaceletFactory.java:201) at com.sun.faces.application.view.FaceletViewHandlingStrategy.buildView(FaceletViewHandlingStrategy.java:764) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:100) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:410) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) </code></pre> <p>I get this error even when I enter the URL directly into the browser.</p> <p>Im using Netbeans 7.1 with Apache Tomcat 7(which by the way is a pain because I get a lot of PermGen out of memory exceptions -.-)</p> <p>Any help on how to fix this would be greatly appreciated.</p>
 

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