Re: Deletion of objects

Mon, 26 Nov 2007 03:23:54 -0800

Would be nice to open a Jira with details. We should be able to do something about it. 

Andrus


On Nov 22, 2007, at 12:43 AM, Jan Lendholt wrote:
Okay, I found the error - I used a wrong datatype for the matchExpression. Well, in fact this is a stupid mistake by me; but in my opinion the framework could handle this more smoothly.
Just told you this nice exception as a illustration on how difficult it could become working with cayenne if one is just a bit hasty on cayennes use. I think that hibernate in this context is more reliable; but therefore requires more work to be running at first. 
But dont want to talk about that now.

Greets Jan




From: [EMAIL PROTECTED]
To: user@cayenne.apache.org
Subject: RE: Deletion of obejcts
Date: Wed, 21 Nov 2007 22:38:34 +0000

Hey Kevin,

here is one of those exceptions I cannot get used to:

java.lang.NullPointerException
at org .apache .cayenne .access .trans .QualifierTranslator.appendObjectMatch(QualifierTranslator.java:153) at org .apache .cayenne .access.trans.QualifierTranslator.endNode(QualifierTranslator.java: 321) 
   at org.apache.cayenne.exp.Expression.traverse(Expression.java:520)
   at org.apache.cayenne.exp.Expression.traverse(Expression.java:511)
   at org.apache.cayenne.exp.Expression.traverse(Expression.java:491)
at org .apache .cayenne .access .trans.QualifierTranslator.doTranslation(QualifierTranslator.java:74) at org .apache .cayenne .access .trans.SelectTranslator.createSqlString(SelectTranslator.java:129) at org .apache .cayenne .access.trans.QueryAssembler.createStatement(QueryAssembler.java:95) at org .apache .cayenne.access.jdbc.SelectAction.performAction(SelectAction.java:71) at org .apache .cayenne .access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:59) at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:273) at org .apache .cayenne .access.DataDomainQueryAction.runQuery(DataDomainQueryAction.java: 301) at org.apache.cayenne.access.DataDomainQueryAction.access $000(DataDomainQueryAction.java:60) at org.apache.cayenne.access.DataDomainQueryAction $1.transform(DataDomainQueryAction.java:273) at org .apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java: 836) at org .apache .cayenne .access .DataDomainQueryAction .runQueryInTransaction(DataDomainQueryAction.java:270) at org .apache .cayenne .access.DataDomainQueryAction.execute(DataDomainQueryAction.java:110) at org.apache.cayenne.access.DataDomain.onQuery(DataDomain.java: 746) at org .apache .cayenne .util .ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:217) at org .apache .cayenne .access.DataContextQueryAction.execute(DataContextQueryAction.java: 54) at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1387) at org .apache .cayenne .util .ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:217) at org .apache .cayenne .access.DataContextQueryAction.execute(DataContextQueryAction.java: 54) at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1387) at org.apache.cayenne.access.DataContext.performQuery(DataContext.java: 1376) at ams .maintabpanes .buchungdetail .SingleBuchungContentPaneCatering .<init>(SingleBuchungContentPaneCatering.java:195) at ams .maintabpanes .buchungdetail .BuchungDetailWindowPane.<init>(BuchungDetailWindowPane.java:103) at ams.maintabpanes.event.EventTabPane $4.actionPerformed(EventTabPane.java:522) at nextapp .echo2 .app.button.AbstractButton.fireActionPerformed(AbstractButton.java: 135) at nextapp.echo2.app.button.AbstractButton $1.actionPerformed(AbstractButton.java:100) at nextapp .echo2 .app .button .DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:70) at nextapp .echo2 .app.button.DefaultButtonModel.doAction(DefaultButtonModel.java:58) at nextapp .echo2.app.button.AbstractButton.doAction(AbstractButton.java:121) at nextapp .echo2.app.button.AbstractButton.processInput(AbstractButton.java: 506) at nextapp .echo2 .app.update.ClientUpdateManager.process(ClientUpdateManager.java:116) at nextapp .echo2 .app.update.UpdateManager.processClientUpdates(UpdateManager.java:89) at nextapp .echo2 .webcontainer .ContainerSynchronizeService .renderUpdate(ContainerSynchronizeService.java:472) at nextapp .echo2 .webrender .service.SynchronizeService.service(SynchronizeService.java:279) at nextapp .echo2.webrender.WebRenderServlet.process(WebRenderServlet.java:276) at nextapp .echo2.webrender.WebRenderServlet.doPost(WebRenderServlet.java:192) 
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
   at ams.AMSServlet.service(AMSServlet.java:36)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: 356) at org.mortbay.jetty.servlet.WebApplicationHandler $Chain.doFilter(WebApplicationHandler.java:342) at org .apache .cayenne .conf .WebApplicationContextFilter .doFilter(WebApplicationContextFilter.java:91) at org.mortbay.jetty.servlet.WebApplicationHandler $Chain.doFilter(WebApplicationHandler.java:334) at org .mortbay .jetty .servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java: 286) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java: 567) 
   at org.mortbay.http.HttpContext.handle(HttpContext.java:1776)
at org .mortbay .jetty .servlet.WebApplicationContext.handle(WebApplicationContext.java:514) 
   at org.mortbay.http.HttpContext.handle(HttpContext.java:1726)
   at org.mortbay.http.HttpServer.service(HttpServer.java:879)
at org.mortbay.http.HttpConnection.service(HttpConnection.java: 790) at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:952) 
   at org.mortbay.http.HttpConnection.handle(HttpConnection.java:807)
at org .mortbay.http.SocketListener.handleConnection(SocketListener.java: 196) 
   at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
   at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:487)
Well, the only thing I was doing was setting up a select query end performing the query. I received this.
How shall someone solve this issue without having a look into cayenne's sources? I developed quite a few frameworks for company-internal uses and I am ALWAYS checking, if all possible exceptions are correctly caught and at least giving a possible reasong for an exception. For now, I did not solve the problem but guess, there something wrong in my statement; but even if: The framework should handle this more gently telling me where the problem exactly lies. 

Thanks a lot.

Jan



Date: Mon, 19 Nov 2007 20:16:04 -0500
Subject: Re: Deletion of obejcts
From: [EMAIL PROTECTED]
To: user@cayenne.apache.org
If you're having another issue, please start a new thread and post the relevant code snippets and exception message. I'll be the first to beat up on Cayenne's error messages, so if you can give concrete examples of where 
they fail, I'll try to get them fixed for you.


On 11/19/07 7:10 PM, "Jan Lendholt" <[EMAIL PROTECTED]> wrote:
Thanks all for your replies. I will try that one out (deleting an iterator). 

but, yet another problem: Ich use an object and say:
object.removeFromTestArray(Test);
Afterwards I call Test.getDataContext().commitChanges() to make these changes persistent; but all I get is a "Null Objectid" exception which is yet again an exception which requires a good overview over cayenne's internals; to me and all my people around these error messages cayenne throws are not just a bit 
intuitive :(

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Kevin Menard
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Remote reboot & power control for network equipment
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