[
https://issues.apache.org/jira/browse/WICKET-5912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14560733#comment-14560733
]
Vojtěch Krása commented on WICKET-5912:
---------------------------------------
Hi, yes that would probably work, or to decouple it, from that "center-column":
{code}
panel.replaceWith(resultPanel);
panel = resultPanel;
{code}
Maybe it would be nice to have something like #queueReplace, but I am more
concerned about that NPE...
> NPE in Page#hasInvisibleTransparentChild
> ----------------------------------------
>
> Key: WICKET-5912
> URL: https://issues.apache.org/jira/browse/WICKET-5912
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 7.0.0-M5
> Reporter: Vojtěch Krása
>
> I started to use #queue instead of TransparentWebMarkupContainer as suggested
> in WICKET-5898, to my surprise #replace does not work for queued components
> (it is a feature, right?) :
> {code}
> org.apache.wicket.WicketRuntimeException: Cannot replace a component which
> has not been added: id='PANEL', component=[EmptyPanel [Component id = PANEL]]:
> [Page class = krasa.wicket.npe.BrokenPage, id = 0, render count = 1]
> at org.apache.wicket.MarkupContainer.replace(MarkupContainer.java:736)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at krasa.wicket.npe.BrokenPage$1.onSubmit(BrokenPage.java:24)
> ~[classes/:?]
> at
> org.apache.wicket.ajax.markup.html.form.AjaxButton$1.onSubmit(AjaxButton.java:111)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.ajax.form.AjaxFormSubmitBehavior$AjaxFormSubmitter.onSubmit(AjaxFormSubmitBehavior.java:215)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1307)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at org.apache.wicket.markup.html.form.Form.process(Form.java:974)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:795)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:171)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:156)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:581)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> ~[?:1.7.0_72]
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> ~[?:1.7.0_72]
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ~[?:1.7.0_72]
> at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_72]
> at
> org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:241)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:248)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:234)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:865)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> ~[wicket-request-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:265)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:222)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:261)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:203)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:284)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
> [jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
> [jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
> [jetty-security-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
> [jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at org.eclipse.jetty.server.Server.handle(Server.java:497)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
> [jetty-io-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
> [jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
> [jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
> at java.lang.Thread.run(Thread.java:745) [?:1.7.0_72]
> {code}
> When I click on back button, it will give me an NPE:
> {code}
> java.lang.NullPointerException
> at org.apache.wicket.Page.hasInvisibleTransparentChild(Page.java:679)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at org.apache.wicket.Page.checkRendering(Page.java:645)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at org.apache.wicket.Page.onAfterRender(Page.java:821)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.markup.html.WebPage.onAfterRender(WebPage.java:216)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at org.apache.wicket.Component.afterRender(Component.java:918)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at org.apache.wicket.Component.render(Component.java:2319)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at org.apache.wicket.Page.renderPage(Page.java:1018)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:124)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:195)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:175)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:865)
> ~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
> ~[wicket-request-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:265)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:222)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:261)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:203)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:284)
> [wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
> [jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
> [jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
> [jetty-security-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
> [jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at org.eclipse.jetty.server.Server.handle(Server.java:497)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
> [jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
> [jetty-io-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
> [jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
> [jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
> at java.lang.Thread.run(Thread.java:745) [?:1.7.0_72]
> {code}
> (both in 7.0.0-M5 and current master)
> quickstart: https://github.com/krasa/wicket-bugs
> -Start
> -open http://localhost:8080/
> -click on the button
> -click Back
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
