Stax based parser for GadgetSpec and MessageBundle
--------------------------------------------------
Key: SHINDIG-816
URL: https://issues.apache.org/jira/browse/SHINDIG-816
Project: Shindig
Issue Type: Improvement
Components: Gadget Rendering Server (Java)
Affects Versions: 1.0.x-incubating
Reporter: Henning Schmiedehausen
Attachments: RELEASE-NOTES, svn-stax.patch
This is a large patch which I don't expect to go in without some discussion.
However, we have to start at some point.
As I wrote before (and those of you following my mails to the dev list probably
know), I need some features that the current, DOM based parser for GadgetSpec
and related to this, for MessageBundle, can not deliver. I need to reconstruct
gadget specs from the objects, passing through other namespaced elements and a
number of additional requirements which, in the end, led to a complete new
implementation of the GadgetSpec parser using Stax.
The attached RELEASE-NOTES file describes in ample detail the problems that I
have encountered and the quirks I discovered while dissecting the existing
parser.
And, while it does not really matter with good caching, preliminary tests show
that the parser is measurably faster than the old DOM parser. If it were
possible to stream XML into it, there would be even more performance
improvements.
Given the fact, that we will soon see other namespaces in the gadget spec (the
whole templating stuff), this should be much easier and more readable doable
using this parser approach.
A code review ist at http://codereview.appspot.com/11676
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