Restify Your Apps

RESTify your AppsThe pyOCCI module
Thijs Metsch
Senior Software Engineer Grid and Cloud Technology
tmetsch@platform.com

To RESTify your AppsorHow to Provide a Service to your customers
{whatever}-Layer

How? / What? (Resource-aaS)
Create, Retrieve, Update and Delete Resources
Your App
What is a Resource?
Resources
Perform Actions and Link Resources
Expose Resources across Boundaries

What is a Resource?
The URI (Resource representation)http://example.com/foo/bar
can be:

Pool of Resources
What do you need?
Resource
How to identify, query, list, handle, link, group, perform actions and tag resources?
Resource
Resource
Resource
Resource
Resource
Resource

What it is 1
It’s Capabilities 2
What it belongs to (grouping) 3
What Categories tells youabout a Resource:

HTTP
The only thing you need to do…
Pool of Resources
Resource
pyOCCI
module
Resource
Resource
Resource
HTTP
Resource
Resource
Resource
The ‘glue’
You App
pyREST takes care of this

You NEED to:
Map you Resources to REST-Resources by implementing:
Create, Retrieve, Update, Delete and Action routines

You GET for free:
A interface to your Resources, a way to identify a resources, manage resources, query capabilities, external RESTful interface, an integration point, a (Cloud) Service, Beer,…
pyREST module deals with all the hard issues:
HTTP, Content-Types, Security, Query interface, Renderings etc.

Flexible/Modular/Clear Separation
A Look inside of pyOCCI
Backend
HTTP HeaderRendering
Your App
Backend
HTTP text/uri-list Rendering
OCCI
Model*
Backend
HTTP
Handling
HTTP text/plain Rendering
Backend
Handles HTTP verbs (POST,PUT,DELETE,GET) & stuff (REST, Security, etc.)
HTTP text/html Rendering
…
Backend defines categories it can handle(Automatic selection)
Map HTTP Data to OCCI Model(Automatic selection)
* http://www.occi-wg.org

Examples (1)
Query int – shows what this Service can handle

Examples (2)
Create New…
What is it?
See Query int.
Actions & Links
Attributes

Examples (3)
Basically any Programming Language (Integration)
CLI

?
The pyOCCI module is part of pySSF: http://pyssf.sf.net
Version: 0.2.19(This is pre- (Do not try this at home) -Alpha Software - also in pypi)
LGPL Licensed
© Platform Computing

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Restify Your Apps

by befreax on Mar 07, 2011

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