settings table example

settingsExample.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import boto3
from boto.dynamodb2.table import Table

def saveSetting(applicationName, settingName, value):
	client = boto3.client('dynamodb')
	response = client.update_item(TableName="chrisSettings", 
								  Key={ "applicationName": { "S": applicationName } },
								  AttributeUpdates={ settingName: { "Value": {"S": value} } })

def getSetting(applicationName, settingName, settingType="S"):
	client = boto3.client('dynamodb')
	
	#todo: cache the entire item, then pull settings from there instead of going to the db each time and using ProjectionExpression.

	#NOTE: use of AttributesToGet is deprecated, but ProjectionExpression breaks if you have settings with spaces in the names...
	response = client.get_item(TableName="chrisSettings", 
							   Key={ "applicationName": { "S": applicationName } },
							   ProjectionExpression=settingName)
							   #AttributesToGet=[settingName])
	#print response
	return response["Item"][settingName][settingType]

if __name__ == '__main__':
    saveSetting("portal", "PortalSetting1", "value 1")
    saveSetting("portal", "PortalSetting2", "value 2")
    saveSetting("portal", "PortalSetting3", "value 3")
    saveSetting("career network", "CN2.0Setting1", "value 4")
    saveSetting("career network", "CN2.0Setting2", "value 5")
    saveSetting("whowhat", "WhoOrWhatSetting1", "value 6")

    setting = getSetting("whowhat", "WhoOrWhatSetting1")
    print setting