Thank you for the insights - that's pretty much as I imagined. I'm
hoping to sell the idea of upgrading the Java code to the newer JDOM -
this may be tough, we use it all over the place, but the idea of
performance improvements will help...
Regards,
Wyatt
On 3/18/2010 7:55 PM, Jason Hunter wrote:
I've been experimenting w/ the latest MLSQL, and had a question
regarding the jdom.jar file which is included w/ the MLSQL
distribution. The MANIFEST.MF inside the .jar indicates that it is JDOM
Implementation-Version: 1.0.1, but I don't see that version listed on
the JDOM site (http://www.jdom.org/news/index.html) - it looks like it
was built 9/14/2005...
All JDOM versions are available in the archives:
http://jdom.org/dist/binary/archive/
Where it gets tricky is that I'm trying to add the MLSQL servlet to an
existing Java webapp where JDOM is already in use
(Implementation-Version: 1.0beta10)...
Beta 10 is a pre-release from six years ago. Let's see if I can remember that
far back...
When I use the 1.0beta10 version I get the following error:
java.lang.NoSuchMethodError:
org.jdom.Element.addContent(Lorg/jdom/Content;)Lorg/jdom/Element;
Yes, that was a change between beta10 and 1.0. The list of changes between
Beta 10 and 1.0 are included in the CHANGES.txt file in the root of the JDOM
distribution. There's a few API changes (we never promised permanent backward
compatibility with the pre-release betas) but regardless you should upgrade
because a lot of bugs were fixed since Beta 10. Some performance improvements
too.
The version bundled with MLSQL remedies the problem (as does JDOM
version 1.0), but I'm concerned that deploying a newer version will
break something. Initial tests are good, but this is a large
application with 30+ developers, so I'm not sure of all the code that is
dependent on JDOM...
Can you say with any degree of certainty that code written against JDOM
1.0beta10 will be compatible with JDOM version 1.0 or 1.0.1? If forced
to, will MLSQL work with JDOM version 1.0?
The JDOM API changed between Beta 10 and the 1.0 release. You shouldn't
back-port MLSQL to Beta 10; you should upgrade the code to JDOM 1.0.1 or really
JDOM 1.1.1. JDOM is maintaining backward compatibility between 1.x releases.
I'm pretty sure MLSQL will work well against JDOM 1.1.1 also.
Now back to the regularly scheduled MarkLogic specific discussions... :)
-jh-
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