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From "Gee Chia (JIRA)" <>
Subject [jira] Commented: (AXIS2-2120) Metadata Exchange support on Axis2
Date Wed, 07 Feb 2007 18:40:05 GMT


Gee Chia commented on AXIS2-2120:

I appreciate your reminder to consider different implementation alternative.

During the design and implementation of the metadata exchange solution, I am trying to consider
from different perspectives of how Axis2 users/developers might be using the metadata exchange
code, and also how to fit the solution in the very robust Axis2 architecture - configurable
and easily extensible for supporting different data retrieval implementation, and future data
retrieval requirements. I am hoping to provide a more general data retrieval (exchange) code
base to address WS-MEX specification requirements as well as longer-term needs. 

a. Supports extensible set of data i.e. not limited to only WSDL, Policy, and Schema. See for an example.

b. Provides hooks for other mechanisms to store/generate the metadata i.e. allows Axis2 users
to implement specialize data retrieval logic instead of using the default Axis2 implementation.
The plug-in data locator is not MEX-specific. It is about how to associate some extra data
with a target web service. MEX is just one way to access to the data locator to perform metadata

The data retrieval extends in Axis2 kernel is to provide support  for data associated with
a service, and to provide a way for people to plug-in their own implementation for retrieving
and/or generating data. 

Again, thanks for your attention.
Gee Chia

> Metadata Exchange support  on Axis2
> -----------------------------------
>                 Key: AXIS2-2120
>                 URL:
>             Project: Axis 2.0 (Axis2)
>          Issue Type: New Feature
>          Components: modules
>    Affects Versions: nightly
>            Reporter: Gee Chia
>         Attachments: mexPatch
> New features to support WS-MetadataExchange specification on Axis.  Basically, to support
incoming Get Metadata request message from SOAP protocol engines, Axis2 SOAP processing is
extended with new metadataExchange module, and allows plug-in of Data Locators. Data Locator
is responsible to perform data retrieval. The plug-in support allows other Web Services engines
that build on top of Axis2 to support different data retrieval implementation. 

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