Google Appengine 1.4.0

Channel API, Warmup Requests, Metadata Queries

http://s.beproud.jp/channel-api

: Ian Lewis

: BeProud

: #beproud #redbull #python #django #appengine #kayja #kay_fw

Appengine API Expert

http://www.ianlewis.org/

http://twitter.com/IanMLewis

http://bitbucket.org/IanLewis

google.appengine.api.labs.taskqueue deprecated google.appengine.api.taskqueue

Cron 10

DataStore

NamespaceEntityProperty

for namespace in Namespace.all(): print namespace.namespace_name

for kind in Kind.all(): print kind.kind_name for property in Property.all().ancestor(kind): print " %s" % property.property_name

Always On

3

spin up

Warmup Request

Warmup Request

warmup

inbound_services:- warmup

- url: /_ah/warmup.* script: warmup.py

import mybigmoduleimport myothermodule

def main(): print "Content-type: text/plain" print "OK"

Channel API

push

Channel API

Channel API

ID

Channel API

from google.appengine.ext import webappfrom google.appengine.api import channelfrom django.template.loader import render_to_string

class MyHandler(BaseHandler): def get(self): user = users.get_current_user() # # create_channel id = channel.create_channel(user) return self.response.out.write(render_to_string("index.html", {"channel_id": id}))

Channel API

from google.appengine.api import channelfrom google.appengine.api import usersclass AjaxHandler(BaseHandler): def get(self): user = users.get_current_user() # # # # JSON channel.send_message(user, "Hello World!!")

Channel API

var channel = new goog.appengine.Channel("{{ channel_id }}");var socket = channel.open();socket.onopen = function() { window.setTimeout(function() {alert('Connected!')}, 100);}// socket.onmessage = function(evt) { // JSON // var o = JSON.parse(evt.data); alert(evt.data); // do something}

Channel Socket

http://s.beproud.jp/bpstudy40demo

http://s.beproud.jp/bpstudy40map

ian@beproud.jp@IanMLewis