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From conflue...@apache.org
Subject [CONF] Apache Tuscany: SCA Java Roadmap (page created)
Date Sun, 06 Jul 2008 06:37:00 GMT
SCA Java Roadmap (TUSCANY) created by Luciano Resende
   http://cwiki.apache.org/confluence/display/TUSCANY/SCA+Java+Roadmap

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h2.Web 2.0 Roadmap

h3.JSON-RPC

*Scenarios:*
* A client application invoke a SCA Service using JSON-RPC and the invocation returns a business
exception.
** e.g Empty catalog throws a Busines Exception. Business Exception should properly propagate
and display nicely to client.
* A client application invoke a SCA Service using JSON-RPC and the invocation returns a runtime
exception.
** e.g Try to retrieve catalog items from a catalog service that is un-available. Runtime
exception properly propagate and display nicely to client.
* A client application needs to access a service exposed trough JSON-RPC binding that requires
authentication.
** e.g make sure if nobody can get to the catalog if it's not authenticated

*Features/JIRAS*

* Exceptions not properly reported to client by JSONRPC binding (TUSCANY-1961)
* Support for security (this will require exploratory work to understand what SCA security
policies make sense to implement) (TUSCANY-2394 )
* Business Exception reporting, business exceptions raised by a service should be transported
to the client through JSON and reported to the client as proper JavaScript business exceptions
(TUSCANY-2394 )
* Better runtime exception reporting, runtime exceptions occurring as part of a JSON-RPC interaction
should be properly reported to the JavaScript client. (TUSCANY-2394)
* Complete data binding support, a set of test cases should be written to make sure that the
POJO and JAXB patterns supported in Java components have a proper mapping to JSON and that
the application developer can easily understand the corresponding representation of these
objects in JavaScript. (TUSCANY-2394)
* Build some samples that consume publicly available JSON services (e.g from programmableweb,
or yahoo)


h3.ATOM

*Scenarios*

*Features/JIRAS*

* Complete support for ATOM API
** Analyze specification gaps
** Complete support for location header
** Full support for lastmodified in HTTP headers and etags
*** needs to involve application logic, to properly find the lastmodified data... 
* Support for postMedia and putMedia, including the ability to stream that content in the
target application component 
* Support for security (this will require exploratory work to understand what SCA security
policies make sense to implement)
** Provide security support for verb actions (e.g. delete)
** ATOM pub users often need to login.  Google GDATA supports SSO
** Provide support for Authentication|Encryption|Signatures ???
* Enhanced error reporting, mapping errors like resource not found to HTTP 404. Other errors
might be mapped to HTTP 500 with proper exception in the message body.
* Ability to negotiate content types (XML, JSON etc) and use the corresponding Tuscany data
bindings to provide data with the requested content type
* Enhance performance on low-bandwidth by providing gZipped contents enabled by http headers
* Improve the client side programming model by researching available JavaScript Atom API or
investigate creating one.
* Integrate Atom binding with persistence repository (e.g database and implementation.data.xml)
** investigate how to handle relationships (e.g When you have a customer that owns multiple
accounts, you can define HREF to a account feed, but how do you handle that sub-set of accounts
that the customer owns.)
* ATOM workspace support

*References:*
* Atom publish protocol : http://tools.ietf.org/html/rfc5023
* Atom syndcation protocol : http://tools.ietf.org/html/rfc4287

h3.Widget

*Scenarios*

*Features/JIRAS*

* Support references wiring to services from multiple hosts/ports (on demand js pattern)
* Add support for other bindings (e.g DWR)
* Support widget implementation over web-app

** Discuss possible deprecation of scaDomain.js
* Enable support for google widgets (using shindig)
* Upgrade to latest open ajax (tutorial)


h2.Sample, Scenarios and Tutorial

* Integrate implementation-data-xml to provide data feeds.
** Use store tutorial to drive this item

* PhotoGallery scenario ?

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