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From Jarek Gawor <>
Subject Re: Web Annotation and web fragment support in Geronimo 3.0
Date Tue, 26 Jan 2010 05:15:32 GMT
IMHO, I don't think we should worry about the JAXB conversion now
unless there is no other way to fix the given problem. It might help
things in long long term but right now I think it is important to get
things running first. I especially don't want to debug 2 versions of
all the builders.


On Mon, Jan 25, 2010 at 9:42 PM, David Jencks <> wrote:
> On Jan 25, 2010, at 6:30 PM, Ivan wrote:
> 1. I saw the empty web.xml file also, I would suggest that even if we really
> need that file, it should be added by DeploymentContext, not directly write
> to repository.
> 2. Thanks for the suggest of using JAXB, I am sure that it would be easy to
> parse/generate xml file. But how about generating a full jaxb classes for
> Java EE deployment descriptors. I knew that we have had a XMLBeans version,
> but I wish that we should replace it in the future.
> Anyway, I would first try to generate the jaxb classes for
> web-3.0/web-fragment/web-common and the required reference types from javaee
> schema, so that it would keep the effect in the web-builder module.
> According to David Blevins you'll want to tweak the generated jaxb classes
> to get more reasonable classes.  Openejb has all of this done for ee5 xsds.
>  I would start with those and see how to update for the schema additions.
> Also, we'll need 2 versions of all the naming builders, one for jaxb and one
> for xmlbeans, until we get everything converted.
> I was thinking of doing the same for connectors which have the advantage
> that they don't call any naming builders.
> thanks
> david jencks
> 2010/1/26 David Jencks <>
>> On Jan 25, 2010, at 2:51 PM, Jarek Gawor wrote:
>>> I agree. I think it would good for Geronimo to construct the
>>> metadata-complete web.xml and pass it to Tomcat to handle the rest.
>>> Btw, in TomcatModuleBuilder.addGBeans() there is a bit of code that
>>> (re)writes a web.xml. Does anybody know why is that (still) needed?
>>> The comment above that bit of code talks about when web.xml is missing
>>> (in jaxws case) but the code seems to be writing an empty web.xml even
>>> if web.xml is present and has Java EE namespace.
>> The only way to be sure is to take it out and see what happens :-)
>> IIRC the main purpose is to write the metada-complete web.xml out for
>> tomcat to find... but I may not RC.
>> thanks
>> david jencks
>>> Jarek
>>> On Mon, Jan 25, 2010 at 1:31 PM, David Jencks <>
>>> wrote:
>>>> On Jan 25, 2010, at 7:20 AM, Ivan wrote:
>>>>> Hi,
>>>>>   Recently, I am looking at the annoation  and web fragment in Servlet
>>>>> 3.0. After checking some integration codes, it seems that we have
>>>>> different
>>>>> strategy for Tomcat and Jetty, in Tomcat plugin, after doing some
>>>>> verification and web service process work, Geronimo will pass the
>>>>> web.xml
>>>>> file directly to Tomcat, and then Tomcat will parse the web.xml file
>>>>> and
>>>>> call the addChild method to register all the servlets to context. While
>>>>> in
>>>>> Jetty plugin, all the work is done in Servlet GBean and Jetty will not
>>>>> check
>>>>> the web.xml file (At least for servlet configurations).
>>>>>   So in Geronimo 3.0, who will be resposible for the annotation and
>>>>> fragment scanning. For Tomcat, one way is still to let Tomcat does it,
>>>>> actually I found some related codes are added in ContextConfig class.
>>>>> Although I found some errors while trying it, it should be easy to
>>>>> solve.
>>>>> Another way is to scan by Geronimo, then create a gbean for each
>>>>> servlet
>>>>> like Jetty, or just generate a full web.xml file.
>>>>>   Personally, I wish to do it by Geronimo, so that Geronimo could have
>>>>> a
>>>>> full control of it, which keeps the same way with Jetty. Also, I have
>>>>> another idea about improving the class scanning, IIRC, many builders
>>>>> require
>>>>> annoation scanning or file scanning, like web-builder,
>>>>> webservice-builder,
>>>>> etc. I am thinking that whether we could do all the scanning work in
>>>>> one
>>>>> round, not a new round search would be triggered by each builder.
>>>>> Maybe, we
>>>>> could add some methods like registerScanningHandler in the
>>>>> DeploymentContext, and once the temp bundle is installed, all the
>>>>> scanning
>>>>> work be will done in one round.
>>>>>   Any comment ? Thanks !
>>>> In tomcat, I think we have to let tomcat create the servlet wrapper
>>>> objects.
>>>>  Several people have tried to turn them into gbeans but it conflicts
>>>> with
>>>> tomcat's attempt to manage the component lifecycle.  I think we could
>>>> write
>>>> a jaxb-based processor to replace the tomcat digester one and this might
>>>> simplify our code.
>>>> I would prefer that geronimo scan for annotations and construct a
>>>> complete
>>>> web.xml from them and then process the web.xml either through our code
>>>> (like
>>>> in jetty) or through the web containers code (like in tomcat).
>>>> Another possibility would be to use the new servlet 3.0 apis for adding
>>>> servlets etc to a web app.  We might be able to write a single processor
>>>> to
>>>> read through the metadata-complete web.xml and call the appropriate
>>>> methods
>>>> to construct the web app.  At the moment I don't recall any
>>>> geronimo-specific configuration that applies to specific servlets,
>>>> filters,
>>>> or listeners so this code might not need to look in geronimo plans very
>>>> much.
>>>> I like your idea of combining the annotation scanning.
>>>> thanks
>>>> david jencks
>>>>> Ivan
> --
> Ivan

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