Hello Craig,
Oops, I compiled parancoe-yaml with Eclipse, and didn't check the version.
Should compile with Java 5 though. My mistake. Spike compiles with the ant
task set to 1.5 source and target. I'll recompile the jar file and update
the svn repository this weekend.
John
Craig L Russell wrote:
>
> Hi John,
>
> Does the project require Java 6? I checked out the sources and cd
> trunk; ant. It appears that one of the dependencies is compiled with
> Java 6.
> test-compile:
> [javac] Compiling 29 source files to /Users/clr/spikes/trunk/bin
> [javac] /Users/clr/spikes/trunk/java/src/org/syger/fixtures/
> YamlHelper.java:28: cannot access org.parancoe.yaml.Yaml
> [javac] bad class file: /Users/clr/spikes/trunk/extlib/parancoe-
> yaml.jar(org/parancoe/yaml/Yaml.class)
> [javac] class file has wrong version 50.0, should be 49.0
> [javac] Please remove or make sure it appears in the correct
> subdirectory of the classpath.
> [javac] import org.parancoe.yaml.Yaml;
> [javac] ^
> [javac] 1 error
>
> more below...
>
> On May 10, 2008, at 7:38 AM, John Leach wrote:
>
>>
>> Dear list,
>> As part of a (very) small open source project to provide domain entity
>> mapping and association examples, together with a programmatic
>> interface to
>> reach outside the JPA 1.0 specifications, I am struggling with two
>> problems
>> using OpenJPA.
>>
>> I had better warn you all that I am a freelance consultant working
>> in Italy
>> and I use and will be using this work to sell both the advantages and
>> disadvantages (but with solutions) of using JPA 1.0. to my clients.
>>
>> The first showstopper is an InvalidStateException: Attempt to set
>> column
>> "client.version" to two different values... where the version field
>> is being
>> updated (this is an optimistic locking field, and has a @Version
>> annotation), the SQL query being performed seems to be:
>> UPDATE client SET lastUpdated = ?, version = ? WHERE id = ? AND
>> version = ?
>> [params=(Timestamp) 2008-05-10 15:58:16.593, (int) 3, (long) 3,
>> (int) 2]
>
> This SQL seems correct. It's updating the lastUpdated and version
> columns and verifying that the version is correct. Where does this
> error occur?
>
> Craig
>>
>> The same annotated entities work just fine with Hibernate and
>> EclipseLink -
>> for what that's worth.
>> I have even tried adding openjpac in the ant task, but the results
>> remain
>> the same.
>> I am convinced that this is a Spring/OpenJPA configuration problem,
>> but
>> being a relative novice with Spring (and OpenJPA) I have been
>> beating my
>> head against the proverbial brick wall for two days, and not even a
>> dent in
>> the wall to show for my efforts.
>>
>> The second showstopper is finding a way to change the metadata
>> before an
>> EntityManager is created. The intention is to provide a 'third'
>> alternative
>> to annotations and/or persistence.xml, where the entity classes
>> contain only
>> JPA annotations, with any remaining changes being made
>> programmatically. The
>> one-to-many example defines CascadeType.ALL, but actually requires a
>> 'delete-orphans' extension for the tests to succeed. Again, my many
>> attempts
>> at hooking into the properties openjpa.BrokerFactory or
>> openjpa.BrokerImpl
>> or openjpa.MetaDataFactory all met with failure of one sort or the
>> other
>> (mostly ClassCast exceptions within the OpenJPA code).
>>
>> Any help would be greatly appreciated. I am working 'in
>> collaboration with'
>> two Java User Groups (Torino and Trento), but it's really me who
>> wrote most
>> of the code.
>>
>> The open source project, called Spikes (guess why) can be downloaded
>> via
>> Subversion with the command:
>> svn checkout https://lab.jugtorino.it/svn/sandbox/spikes/trunk spikes
>> There is a Trac site at http://lab.jugtorino.it/trac/sandbox/wiki/Spikes
>> ,
>> which I have converted to English in most places, and also an
>> article (which
>> started the project rolling)
>> http://www.syger.it/Tutorials/JPA10Gotchas.html
>>
>> Best regards
>> John Leach, Verona, Italy
>> --
>> View this message in context:
>> http://www.nabble.com/InvalidStateException%3A-Attempt-to-set-column-%22client.version%22-to-two-different-values-tp17163045p17163045.html
>> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>>
>
> Craig Russell
> Architect, Sun Java Enterprise System http://java.sun.com/products/jdo
> 408 276-5638 mailto:Craig.Russell@sun.com
> P.S. A good JDO? O, Gasp!
>
>
>
>
--
View this message in context: http://www.nabble.com/InvalidStateException%3A-Attempt-to-set-column-%22client.version%22-to-two-different-values-tp17163045p17165114.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
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