Ajax Framework Observer / Event
AutoUpdate allows you to use the observer pattern in which a component maintains a list of its dependents, called observers, and notifies them automatically of any state changes.
Instead of having to list every component you want to update on a CommandButton you can subscribe components to listen to that button's event using @obs(event).
Reloading page
Message: Error Parsing /viewMetadata/ui/file/upload/dnd.xhtml: Error Traced[line: 71] The prefix "jsf" for attribute "jsf:id" associated with an element type "div" is not bound.
StackTrace: javax.faces.view.facelets.FaceletException: Error Parsing /viewMetadata/ui/file/upload/dnd.xhtml: Error Traced[line: 71] The prefix "jsf" for attribute "jsf:id" associated with an element type "div" is not bound.
at org.apache.myfaces.view.facelets.compiler.SAXCompiler.doCompileViewMetadata(SAXCompiler.java:849)
at org.apache.myfaces.view.facelets.compiler.Compiler.compileViewMetadata(Compiler.java:97)
at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory._createViewMetadataFacelet(DefaultFaceletFactory.java:403)
at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory.access$100(DefaultFaceletFactory.java:55)
at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory$2.newInstance(DefaultFaceletFactory.java:129)
at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory$2.newInstance(DefaultFaceletFactory.java:126)
at org.apache.myfaces.view.facelets.impl.FaceletCacheImpl.getViewMetadataFacelet(FaceletCacheImpl.java:112)
at org.apache.myfaces.view.facelets.impl.FaceletCacheImpl.getViewMetadataFacelet(FaceletCacheImpl.java:49)
at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory.getViewMetadataFacelet(DefaultFaceletFactory.java:498)
at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory.getViewMetadataFacelet(DefaultFaceletFactory.java:482)
at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage._getViewMetadataFacelet(FaceletViewDeclarationLanguage.java:2613)
at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.access$000(FaceletViewDeclarationLanguage.java:149)
at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage$FaceletViewMetadata.createMetadataView(FaceletViewDeclarationLanguage.java:2768)
at org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:252)
at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:195)
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:142)
at javax.faces.lifecycle.LifecycleWrapper.execute(LifecycleWrapper.java:57)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:204)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:209)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.primefaces.webapp.filter.NoCacheFilter.doFilter(NoCacheFilter.java:39)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.primefaces.webapp.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:42)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.apache.openejb.server.httpd.EEFilter.doFilter(EEFilter.java:67)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:178)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:153)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:168)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
at org.apache.tomee.catalina.OpenEJBSecurityListener$RequestCapturer.invoke(OpenEJBSecurityListener.java:97)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:670)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:390)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:928)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1794)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Unknown Source)