Overview

Supported Storage Backends

Here is the status of data store backends under development:

back-end	status
JSON or YAML text file	Default
BerkeleyDB	Recommended for production use
SQL (map to arbitrary schema)	under development
SQL (fixed schema)	supported via RDF backends
RDF	support for Redland, RDFLib, and 4Suite RDF APIs
Tokyo Cabinet	Experimental
Memcache	Experimental
Google AppEngine	under development
Federated (multiple backends)	planned

Architecture

vesper.pjson

translates json to internal tuple representation

vesper.query

executes JSONql queries against model

vesper.data.DataStore

high-level query and CRUD interface

vesper.data.base

base data access APIs

vesper.data.store.*

a collection of backend datastore drivers that implement vesper.app provides configuration, generic request, and transaction services

vesper.web

wsgi middleware translates HTTP requests into vesper requests

vesper.web.baseapp

wsgi app that provides an query and update HTTP endpoint and a Javascript library for using it.