#Caesium

Caesium is a restful resource framework with a focus on document scheduling. Proudly built on top of MongoDB, Tornado, and Motor frameworks.

##API Documentation ##CaesiumQuickstart

##Compatibility

Currently it works on python 2.7 only, but 3.3 will be supported soon.

##Installation

Installation is handled the normal way and brings all required dependencies as well.

pip install caesium

##Build Status

#Key Feaures

• Schedule create, update and delete actions at a UTC timestamp, supports document inheritance by default
• Revisions are kept in separate collections per resource type
• Simple to data structure, everything is lists of dictionaries adapted to primitives
• Uses coroutines by default and won't block unless you call yield in your handlers
• Supports JSON Schema models for validation
• Revisions are kept in separate collections _revisions, which can be ideal for some microservice implementations

##Document API (ASyncMotorDocument)

One of the simplest to use portions of the frame work is the ASyncMotorDocument class. It adds a thin layer over the motor framework to vend primitive objects for use in your handler classes.

##Base Handlers

There are several base handlers you can leverage to speed up your development. l

• BaseHandler, base utilities for creating mongo queries from user input
• BaseMotorSearch, A simple endpoint for querying an object of a given type
• BaseRestfulMotorHandler, A conventions based handler for creating schedulable RESTful resources
• RevisionHandler, An implementation for dealing with revisions of various types
• BaseBulkScheduleableUpdateHandler, can schedule many updates or deletes to objects of a given type by passing an array of ids

##Scheduling

Requests that you want to schedule should have a "Caesium-TOA" header with a UTC timestamp as the value for the time you would like this document to be scheduled.

Scheduled actions map to RESTful verbs:

• POST with Caesium-TOA header would be a scheduled insert
• PUT with Caesium-TOA header is a scheduled PATCH to the object via mongo $set query
• DELETE with Caesium-TOA is a scheduled delete from the master collection Note: Deletes do not delete from the revisions collection for that object type, which can allow for easy reverts, but a potentially large database

The primary way to interact with the scheduling system is to use the "Caesium-TOA" header and set a utc timestamp to the time you want your action to be performed.