Olivier Jacquemart ojacquemart

Is socket.push(bytes) all you need to program Realtime Web apps?

One of the goals of Play2 architecture is to provide a programming model for what is called Realtime Web Applications.

Realtime Web Applications

Realtime Web Applications are applications that make use of Websockets, Server Sent Events, Comet or other protocols offering/simulating an open socket between the browser and the server for continuous communication. Basically, these applications let users work with information as it is published - without having to periodically ping the service.

There are quite a few web frameworks that target the development of this type of application: but usually the solution is to simply provide an API that allows developers to push/receive messages from/to an open channel, something like:

Open Conference Expectations

This document lays out some baseline expectations between conference speakers and conference presenters. The general goal is to maximize the value the conference provides to its attendees and community and to let speakers know what they might reasonably expect from a conference.

We believe that all speakers should reasonably expect these things, not just speakers who are known to draw large crowds, because no one is a rockstar but more people should have the chance to be one. We believe that conferences are better -- and, dare we say, more diverse -- when the people speaking are not just the people who can afford to get themselves there, either because their company paid or they foot the bill themselves. Basically, this isn't a rock show rider, it's some ideas that should help get the voices of lesser known folks heard.

These expectations should serve as a starting point for discussion between speaker and organizer. They are not a list of demands; they are a list of rea

Handlebars.js is a template framework for Javascript environments. It allows the construction of HTML elements using HTML and expressions wrapped in {{ }}

Limitations of {{if}}

One of the conditional block helpers Handlebars offers is the {{#if}}.

For example:

<div class="entry">

	public class MainActivity extends android.support.v4.app.FragmentActivity {
	// Only one MapView instance is allowed per MapActivity,
	// so we inflate it in the MainActivity and tie its
	// lifetime here to the MainActivity. Package scope
	// so we can grab them from different instances of map
	// fragments.
	//
	// The other option was to make them static, but that causes
	// memory leaks on screen rotation.
	View mMapViewContainer;

	public class ProgressDialogActivity extends FragmentActivity {

	final static String LOADING_DIALOG_TAG = "progress_dialog";

	/**
	* Shows the loading progress dialog
	*/
	public void showLoadingDialog() {

	FragmentTransaction ft = getSupportFragmentManager().beginTransaction();

	def Secured[A](username: String, password: String)(action: Action[A]) = Action(action.parser) { request =>
	request.headers.get("Authorization").flatMap { authorization =>
	authorization.split(" ").drop(1).headOption.filter { encoded =>
	new String(org.apache.commons.codec.binary.Base64.decodeBase64(encoded.getBytes)).split(":").toList match {
	case u :: p :: Nil if u == username && password == p => true
	case _ => false
	}
	}.map(_ => action(request))
	}.getOrElse {
	Unauthorized.withHeaders("WWW-Authenticate" -> """Basic realm="Secured"""")

	package com.quiz.pkg;

	public class Singleton
	{

	private static final Singleton INSTANCE = new Singleton();

	public static Singleton getInstance()
	{
	return INSTANCE;

	[
	{ "keys": ["f12"], "command": "htmlprettify"},
	{ "keys": ["f1"], "command": "fold" },
	{ "keys": ["f2"], "command": "unfold" },
	{ "keys": ["ctrl+à"], "command": "show_overlay", "args": {"overlay": "goto", "text": "@"} },
	{ "keys": ["ctrl+!"], "command": "show_overlay", "args": {"overlay": "goto", "text": ":"} },
	{ "keys": ["ctrl+space"], "command": "auto_complete" },
	{ "keys": ["ctrl+space"], "command": "replace_completion_with_auto_complete", "context":
	[
	{ "key": "last_command", "operator": "equal", "operand": "insert_best_completion" },

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Multicelldesign CSS Ribbon</title>
	<!-- Don't forget to add an HTML5 polyfill for IE -->
	</head>
	<body>
	<div class="wrapper">
	<nav role="navigation" aria-label="main menu">

	// Source: https://groups.google.com/forum/#!topic/angular/hVrkvaHGOfc
	// jsFiddle: http://jsfiddle.net/pkozlowski_opensource/PxdSP/14/
	// author: Pawel Kozlowski

	var myApp = angular.module('myApp', []);

	//service style, probably the simplest one
	myApp.service('helloWorldFromService', function() {
	this.sayHello = function() {
	return "Hello, World!"