Hi Stephen, can you please create separate bug reports for issues 1) and 2) at http://jira.codehaus.org/browse/CASTOR ?
With regards to issue 1), let me just tell you that I am currently looking at a very old issue (CASTOR-475) that indicates that Castor has problems with self-referential relations (1:M) in the context of object hierarchies (using the extend relation). As far as I can tell, there's issues with SQL generation in the context of this scenario. I'll assign issues as you make them available, but please note that 1.0 M2 will ship without any fixes for those two issues to-be-raised. Finally, let me just express my gratitude for your patience and your willingness to work on those issues. Very much appreciated. Regards Werner Stephen Ince wrote: > Werner, > I have resolved my issues with lazy loading and upgrading from castor > .9.5.3 to 1.0m1. > Here are my findings. > > 1) You can't lazy load a list of dependent objects that are self > referential. I think the main issue is that castor uses a collection > for lazy-loading and the order can't be maintained. You really need to > be able to lazy-load a List. Although I did try using a mapping entry > w/o lazy-loading and I still ran into issues with updating and creating. > > Resolution: you have to do all your loading, updating and deleting of > self-referential objects programmatically. You can't use the mapping file. > > 2) 1-to-many OQL is dramatically slower from from castor .9.5.3 to1.0m1. > > Resolution: use jdbc sql to get all the ids, and then use castor to > load the objects independently. > > 3) Performance improvement loading,updating, and deleting objects in > Castor 1.0m1. I did have a performance patch for .9.5.3 and it is not > needed any more. I think castor is now using a hash set, to keep track > of identities for a transaction. > > 4) I was intermittently getting duplicate identity errors but that seems > to be resolved. > > I can do a bug report for 1 and 2. Let me know if you thing I need more > details. > > Steve > > > ----- Original Message ----- From: "Werner Guttmann" > <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Wednesday, February 01, 2006 8:45 AM > Subject: RE: [castor-user] bug in lazy loading in 1.01m > > >> Thanks, Steve. >> >> Werner >> >>> -----Original Message----- >>> From: Stephen Ince [mailto:[EMAIL PROTECTED] >>> Sent: Mittwoch, 01. Februar 2006 14:39 >>> To: [email protected] >>> Subject: Re: [castor-user] bug in lazy loading in 1.01m >>> >>> Werner, >>> Thanx for the reply. No. I am going to try a few things. >>> I can't really use a sortedset, it doesn't allow for >>> duplicate entries. I will submit a bug report and a work around. >>> >>> Steve >>> ----- Original Message ----- >>> From: "Werner Guttmann" <[EMAIL PROTECTED]> >>> To: <[email protected]> >>> Sent: Tuesday, January 31, 2006 3:49 PM >>> Subject: Re: [castor-user] bug in lazy loading in 1.01m >>> >>> >>> > Stephen, >>> > >>> > does the approach as suggested by Ralf address your issue ? >>> If not, can >>> > you please provide me with a fully working sample (ideally >>> following the >>> > bug submission guidelines available at >>> http://castor.codehaus.org) to >>> > replay your problem ? >>> > >>> > Thanks >>> > Werner Guttmann >>> > >>> > Ralf Joachim wrote: >>> >> Hi Stephen, >>> >> >>> >> Werner recently added collection="sortedset" (included >>> with 1.0M1). I >>> >> don't know how it behaves together with lazy loading but >>> it should be >>> >> the best option for you. >>> >> >>> >> You may want to have a look at release-notes for a short >>> description on >>> >> how to use it. >>> >> >>> >> Regards >>> >> Ralf >>> >> Castor JDO, committer >>> >> >>> >> >>> >> Stephen Ince schrieb: >>> >> >>> >>>I am getting duplicate entries when I am using lazy loading for a >>> >>>collection. It only happens when I add all the items to >>> the arraylist. >>> >>>What is the best way to model lazy loading when the >>> collection needs to >>> >>>be sorted? >>> >>> >>> >>>1--- N >>> >>>WebResource ------> FormData. >>> >>> >>> >>>Here is my implementation and mapping file. >>> >>> >>> >>>Class WebResource { >>> >>>: >>> >>> ArrayList formData = new ArrayList(); >>> >>> >>> >>> public void setFormData(Collection formData) { >>> >>> >>> >>> this.formData.clear(); >>> >>> if ( formData == null ) return; >>> >>> >>> >>> this.formData.addAll(formData); >>> >>> >>> >>> final Iterator iter = this.formData.iterator(); >>> >>> while(iter.hasNext() ) { >>> >>> FormData f = (FormData) iter.next(); >>> >>> f.setWebResource(this); >>> >>> } >>> >>> java.util.Collections.sort(this.formData); >>> >>> } >>> >>> >>> >>> >>> >>> >>> >>><class name="com.opendemand.jdo.WebResource" auto-complete="false" >>> >>>identity="webResourceId" key-generator="keygen" >>> >>>depends="com.opendemand.jdo.UserScenario"> >>> >>> >>> >>><field name="formData" type="com.opendemand.jdo.FormData" >>> >>> >>> >>>required="false" direct="false" transient="false" >>> >>>collection="collection" lazy="true"> >>> >>> >>> >>><sql many-key="web_resource_id" dirty="ignore" /> >>> >>> >>> >>></field> >>> >>> >>> >>></class> >>> >>> >>> >>>Steve >>> >>> >>> >>> >>> >>>------------------------------------------------- >>> >>>If you wish to unsubscribe from this list, please send an >>> empty message >>> >>>to the following address: >>> >>> >>> >>>[EMAIL PROTECTED] >>> >>>------------------------------------------------- >>> >> >>> >> >>> > >>> > ------------------------------------------------- >>> > If you wish to unsubscribe from this list, please >>> > send an empty message to the following address: >>> > >>> > [EMAIL PROTECTED] >>> > ------------------------------------------------- >>> > >>> > >>> >>> >>> ------------------------------------------------- >>> If you wish to unsubscribe from this list, please >>> send an empty message to the following address: >>> >>> [EMAIL PROTECTED] >>> ------------------------------------------------- >>> >>> >>> >> >> ------------------------------------------------- >> If you wish to unsubscribe from this list, please >> send an empty message to the following address: >> >> [EMAIL PROTECTED] >> ------------------------------------------------- >> >> >> > > > ------------------------------------------------- > If you wish to unsubscribe from this list, please send an empty message > to the following address: > > [EMAIL PROTECTED] > ------------------------------------------------- > > ------------------------------------------------- If you wish to unsubscribe from this list, please send an empty message to the following address: [EMAIL PROTECTED] -------------------------------------------------
