Pass EntityQuery object to EntityHome's method (help needed)

[dendroid66]

Hello,
I'm using EntityQuery and EntityHome to develop my application.
I have a page with a result of the EntityQuery - it is a table with possibility of check (as checkboxes) some rows to be treated by the EntityHome's method.
EntityHome has a field like:

@In MyEntityQuery mq;

which is suppose to be linked to the result.
The method takes mq to traverse the result set by using mq.getResultSet()

On the .xhtml form a special button invokes this method.
Unfortunately, it gives an exception Can't instantiate an object because mq is null.

What is the best practice to tackle with such a routine?
Should I change the scope type of the EntityQuery class to CONVERSATION?

Any help would be appreciated.

Thanks.

[idyoshin]

the best solution is to deal with @DataModel and @DataModelSelection annotations.

But we can tell you more if you'll post your stack.

Regards,

Ilya Dyoshin

[dendroid66]

In fact, I tried to use another name for the variable at @In that it repeats in exact the paramaeter in annotation for the EntityQuery (@Name(mq)) but, it was not working...

So the questions :
1) How SEAM searches the name used in @In ?
2) How to activate SEAM traces?
3) I seen some reports that @DataModel doesn't work good with QueryEntity

BTW,
I did a small workaround : I avoid using EntityQuery directly but, use the getResultList() to pass it as a parameter to my EntityHome method.
It works but, I don't think it is SEAM minded solution.

Another small question. Why is SEAM so creepy? It takes enormous time to get simple things!!1111

Stack:

JBoss Seam Debug Page
This page allows you to browse and inspect components in any of the Seam contexts associated with the current session. It also shows a list of active, long-running conversations. You can select a conversation to view its contents or destroy it. 
ConversationsConversation ID    Nested? Activity        Description     View ID Action
5       false   12:13:09 - 12:14:13             /debug.xhtml    Select Destroy

-  Component (None selected) 
Select a component from one of the contexts below 
-  Conversation Context (5) entityManager
entityManagerDerby
entityManagerMysql
invoicingLabelIssueList
org.jboss.seam.caughtException
org.jboss.seam.core.conversation
org.jboss.seam.faces.redirect
org.jboss.seam.handledException
org.jboss.seam.international.statusMessages
org.jboss.seam.persistence.persistenceContexts
pointageFileHome
projectsHome
timeEntriesHome

-  Business Process Context 
Empty business process context
-  Session Context dynamicEntityManager
javax.faces.request.charset
org.ajax4jsf.application.AjaxStateHolder
org.ajax4jsf.application.AjaxStateManager.view_sequence
org.jboss.seam.core.conversationEntries
org.jboss.seam.international.localeSelector
org.jboss.seam.international.timeZoneSelector
org.jboss.seam.security.credentials
org.jboss.seam.security.identity
org.jboss.seam.security.rememberMe
org.jboss.seam.security.ruleBasedPermissionResolver
org.jboss.seam.web.session

+  Application Context 
-  Exception 
Exception during request processing: 
Caused by javax.servlet.ServletException with message: "/TimeEntriesEdit.xhtml @71,73 value="#{timeEntriesHome.instance.projectId}": Property 'projectId' not found on type com.pcsol.redmine.entities.TimeEntries" 
javax.faces.webapp.FacesServlet.service(FacesServlet.java:277)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:42)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:51)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:619)
Caused by javax.el.PropertyNotFoundException with message: "/TimeEntriesEdit.xhtml @71,73 value="#{timeEntriesHome.instance.projectId}": Property 'projectId' not found on type com.pcsol.redmine.entities.TimeEntries" 
com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:73)
javax.faces.component.UIOutput.getValue(UIOutput.java:184)
com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:284)
com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:154)
javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:861)
org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:190)
org.jboss.seam.ui.util.cdk.RendererBase.renderChildren(RendererBase.java:166)
org.jboss.seam.ui.renderkit.ValidateAllRendererBase.doEncodeChildren(ValidateAllRendererBase.java:33)
org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.java:92)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:186)
org.jboss.seam.ui.util.cdk.RendererBase.renderChildren(RendererBase.java:166)
org.jboss.seam.ui.renderkit.DecorateRendererBase.doEncodeChildren(DecorateRendererBase.java:146)
org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.java:92)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282)
org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262)
org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:220)
org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:215)
org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:196)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:38)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:42)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:51)
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
java.lang.Thread.run(Thread.java:619)

Merci.

[dendroid66]

Oh sorry, it is a new stack!!!
Old one is not available!!!111

[idyoshin]

Well If you find SEAM to creepy - solve your problems in not creepy environment ;)

if you use annotation to inject your components simply add value-expression of your component:  @In(create=true, value="#{myGreatComponent}") Once your project grows you realize that it would be better to pack components in to the packages, and thus there would be no possibility to inject by naming convention (point isn't allowed in variable name),

And unless you provide the exact trace with your problem - we can't help.

Regards,

Ilya Dyoshin

[dendroid66]

Thank you!

|@In(create=true, value="#{myGreatComponent}")|

really works!!!!!!!!!!!!!!1111111111111