Sandsnake

Introduction

Sandsnake is a sorted index implemented in python and uses redis as a backend. It was originally implemented to be used as an indexing system for Sunspear.

Requirements

Required

Requirements should be handled by setuptools, but if they are not, you will need the following Python packages:

• nydus
• redis
• dateutil

Optional

• hiredis

sandsnake.create_sandsnake_backend

Creates an sandsnake object that allows to to store and retrieve indexes:

>>> from sandsnake import create_sandsnake_backend
>>>
>>> sandsnake = create_sandsnake_backend({
>>>     'backend': 'sandsnake.backends.redis.Redis',
>>>     'settings': {
>>>         'defaults': {
>>>             'host': 'localhost',
>>>             'port': 6379,
>>>             'db': 0,
>>>         },
>>>         'hosts': [{'db': 0}, {'db': 1}, {'host': 'redis.example.org'}]
>>>     },
>>> })

Internally, the Redis sandsnake backend uses nydus to distribute your indexes data over your cluster of redis instances.

There are two required arguements:

• backend: full path to the backend class, which should extend sandsnake.backends.base.BaseSandsnakeBackend
• settings: settings required to initialize the backend. For the Redis backend, this is a list of hosts in your redis cluster.

Example Usage

Redis

from sandsnake import create_sandsnake_backend
import datetime

sandsnake = create_sandsnake_backend({
    "backend": "sandsnake.backends.redis.Redis",
    "settings": {
        "hosts": [{"db": 5}]
    },
})

#add a value of "abc" to the ``index`` for an ``object``
sandsnake.add("user:1", "homefeed", "abc")
sandsnake.add("user:1", ["homefeed", "recogfeed"], "abc")