I have an Entity bean called PaperDetails and a page called newartwork.jsf
which can be used to create a new PaperDetails.
| @Entity(name="gs_paper_details")
| public class PaperDetails implements Serializable{
| @Id
| private int id;
|
| @NotNull
| private String title;
| }
|
| <form action="uploaded.jsf" method="post" enctype="multipart/form-data">
| <h:inputText id="title" value="#{newPaperDetails.title}"/>
| <input type="submit" value="Upload Files"/>
| </form>
|
There is a page action under pages.xml that is used to create the
newPaperDetails component:
| <page view-id="/newartwork.jsf"
action="#{fileUploadAction.initPaperDetails}"/>
|
The FileUploadAction component is used to create and outject the
newPaperDetails component. Also, it handles the upload action after the user
enters the data of the new PaperDetails in the newartwork.jsf page.
| <page view-id="/uploaded.jsf" action="#{fileUploadAction.upload}"/>
|
| @Name("fileUploadAction")
| @Scope(ScopeType.STATELESS)
| public class FileUploadAction{
| //@In(required=false)
| @In(required=false, value="newPaperDetails")
| @Out(value="newPaperDetails")
| private PaperDetails paperDetails;
|
| public void initPaperDetails(){
| log.info("Creating a new paperDetails-120");
| paperDetails = new PaperDetails();
| if(paperDetails == null)
| log.info("initPaperDetails[papreDetails is null]");
| }
|
| public String upload(){
| this.initComponent();
|
| if(paperDetails == null){
| log.info("upload[papreDetails is null]");
| return null;
| }
| }
| }
|
However, the newPaperDetails is gone and its value is set to null when I try to
upload a new artwork. This causes the @Out annotation to complain as shown in
stack trace below:
| StackTrace after accessing the newartwork.jsf page:
| 13:59:21,920 INFO [Pages] reading pages.xml
| 13:59:22,200 INFO [FileUploadAction] Creating a new paperDetails-120
|
|
| StackTrace after calling the upload method:
| 13:59:56,270 INFO [FileUploadAction] upload[papreDetails is null]
| 13:59:56,270 INFO [FileUploadAction] PD is null
| 13:59:56,273 ERROR [STDERR] Jul 28, 2006 1:59:56 PM
com.sun.faces.lifecycle.LifecycleImpl phase
| WARNING: phase(RENDER_RESPONSE 6,[EMAIL PROTECTED]) threw exception:
javax.faces.el.EvaluationException: org.jboss.seam.RequiredException: Out
attribute requires value for component: fileUploadAction.newPaperDetails
org.jboss.seam.RequiredException: Out attribute requires value for component:
fileUploadAction.newPaperDetails
|
com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
| org.jboss.seam.core.Pages.callAction(Pages.java:161)
| org.jboss.seam.core.Pages.callAction(Pages.java:143)
|
org.jboss.seam.jsf.AbstractSeamPhaseListener.callPageActions(AbstractSeamPhaseListener.java:128)
|
org.jboss.seam.jsf.AbstractSeamPhaseListener.beforeRender(AbstractSeamPhaseListener.java:98)
| org.jboss.seam.jsf.SeamPhaseListener.beforePhase(SeamPhaseListener.java:50)
|
org.jboss.seam.jsf.SeamExtendedManagedPersistencePhaseListener.beforePhase(SeamExtendedManagedPersistencePhaseListener.java:38)
| com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:249)
| com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:159)
| javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
|
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
|
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
|
org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:45)
|
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
|
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
|
org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:30)
|
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
|
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
|
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
|
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
|
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
|
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
|
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
|
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
|
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
|
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
|
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
|
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
|
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
|
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
|
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
|
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
| java.lang.Thread.run(Thread.java:595)
| 13:59:56,311 INFO [SeamExceptionFilter] killing transaction
|
I even tried to use the getInstance method of the Component class but with no
luck.
| public String upload(){
| PaperDetails pd =
(PaperDetails)Component.getInstance("newPaperDetails");
| if(pd == null){
| log.info("PD is null");
| }
| }
|
I tried to used different scope types for the newPaperDetails component but
with no avail. I would truly appreciate your help guys.
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