Jeff Lindsay progrium

Ginkgo Tutorial: Introduction

Frameworks

Remember what it was like building web apps before modern web frameworks? It was a lot of work! The structure and conventions that web frameworks gave us brought on a new level of rapid development, best practices, and collective understanding of the problem domain. Frameworks lowered the barrier to entry in building web sites and web applications.

	import gevent.pywsgi

	class UpgradableWSGIHandler(gevent.pywsgi.WSGIHandler):
	"""Upgradable version of gevent.pywsgi.WSGIHandler class

	This is a drop-in replacement for gevent.pywsgi.WSGIHandler that supports
	protocol upgrades via WSGI environment. This means you can create upgraders
	as WSGI apps or WSGI middleware.

	If an HTTP request comes in that includes the Upgrade header, it will add

	"""A distributed group membership module

	This provides distributed group membership for easily building clustered
	applications with gevent. Using this in your app, you just provide the IP
	of another node in the cluster and it will receive the IPs of all nodes in
	the cluster. When a node joins or drops from the cluster, all other nodes find
	out immediately.

	The roster is managed by a leader. When you create a cluster, you tell the
	first node it is the leader (by simply pointing it to its own IP). As you

	<?xml version="1.0" encoding="utf-8"?>
	<DieCutLabel Version="8.0" Units="twips">
	<PaperOrientation>Landscape</PaperOrientation>
	<Id>Label</Id>
	<PaperName>30258 Diskette</PaperName>
	<DrawCommands>
	<RoundRectangle X="0" Y="0" Width="3060" Height="3960" Rx="270" Ry="270"/>
	</DrawCommands>
	<ObjectInfo>
	<ImageObject>

	var badge = Raphael(200, 0, 225, 187);

	// Header
	var attrs = {'fill': '#f90', 'stroke': 'none', 'font-size': 11, 'font-family': 'helvetica'};
	badge.rect(5, 3, 225, 14).attr(attrs);
	badge.circle(212, 8, 16).attr(attrs);
	var textAttrs = {'fill': '#fff', 'font-size': 11, 'font-family': 'helvetica', 'text-anchor': 'end'};
	var text = badge.text(198, 9, "SuperHappyDevHouse");
	text.attr(textAttrs);
	var num = badge.text(211, 9, "48");

	<html>
	<head>
	<style type="text/css">
	svg { margin-left: -2000px; }
	</style>
	<script type="text/javascript" src="http://github.com/DmitryBaranovskiy/raphael/raw/master/raphael-min.js"></script>
	<script type="text/javascript" src="http://canvg.googlecode.com/svn/trunk/rgbcolor.js"></script>
	<script type="text/javascript" src="http://canvg.googlecode.com/svn/trunk/canvg.js"></script>
	<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
	<script src="http://labelwriter.com/software/dls/sdk/js/DYMO.Label.Framework.latest.js" type="text/javascript" charset="UTF-8"> </script>

	# writes host to a host file
	nc -l -p 9998 -c "./parse_http>/tmp/cgi;. /tmp/cgi>/dev/null && echo $HTTP_HOST > host"

	# pipemill the request body
	nc -l -p 9998 -c "./parse_http>/tmp/cgi;. /tmp/cgi \| while read line; do something; done"

	# route on the path
	# uhh, well, sure, just use if on $HTTP_PATHINFO

	def pseudo_code_example():
	"""Compare to the current implementation of start()"""
	class Service:
	def start(self, block_until_ready=True):
	self.state("start_services")
	for child in self._children:
	child.start(block_until_ready)
	self.state("services_started")
	ready = not self.do_start()
	if not ready and block_until_ready:

	ws = new WebSocket("ws://localhost:8181/v1/metric/get")
	ws.onmessage = function (data) { console.log(data.data) }
	ws.send(JSON.stringify({metric: "biz.calls", aggregate: "sum", step: 20, start: "2012-02-15T01:05:00Z", stop: "2012-02-15T02:05:00Z"}))

	class GlobalContext(object):
	"""Context manager mixin for stackable singletons

	Use this mixin when a class has a global singleton set somewhere that can
	be temporarily set while in the context of an instance of that class::

	class Foo(GlobalContext):
	instance = None # where we'll keep the singleton
	singleton_attr = (Foo, 'instance') # tell mixin where it is