Google Wave

Monika Adamczyk
Software Architect, MACO TECH INC
http://www.maco-tech.com
monika@maco-tech.com

AGENDA
 Google Wave Overview
 Wave Embed API
 Wave Extensions
 Wave Gadgets API
 Wave Robots API
 Google Wave Sandbox Demo
 Q&A

WHAT IS GOOGLE WAVE
 New tool for communication and collaboration on web

 A wave is equal parts conversation and document

 It combines email with instant messaging and real-
time collaborations

HOW WAVE WORKS
 Wave is created by one participant
 Other participants are added to the wave
 Everyone can use richly formatted text, photos,
gadgets etc.
 Participants can insert a reply or edit the wave directly
 Participants can see on screen nearly instantly what
others are typing in the wave
 Participants can use “playback” capabilities to rewind
the wave and see how it evolved

BASIC WAVE ENTITIES
 Participants – human
participants and robots
 Wave – threaded
conversation with one or
more participants
 Wavelet – threaded
conversation that is
spawned from a wave
 Blip – basic unit of
conversation which
consists a single message

GOOGLE WAVE API
 Embedded Waves – developers can enhance existing
web applications by embedding Google Wave directly
in their applications
 Extensions – developers can enhance Google Wave by
authoring mini-applications that interact with wave
 Robots
 Gadgets
 Extension Installers which bundle up Backend (robots
and gadgets) and Frontend UI elements into an
integrated package (currently supported only in Google
Wave client)

WAVE EMBED ARCHITECTURE
Web Page

<script
include…/>

Wave Client Wave Server

WAVE EMBED API
 Methods
 LoadWave
 SetUIConfig
 Add Reply
 Follow

SAMPLE FOR EMBEDDED WAVE
<html >
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Wave Embed API Example: Simple Wave</title>
<script src="http://wave-api.appspot.com/public/embed.js"
type="text/javascript"></script>
<script type="text/javascript">
function initialize() {
var wavePanel = new WavePanel('http://wave.google.com/a/wavesandbox.com/');
wavePanel.loadWave('wavesandbox.com!w+waveID');
wavePanel.init(document.getElementById('waveframe'));
}
</script>
</head>
<body onload="initialize()">
<div id="waveframe" style="width: 500px; height: 100%"></div>
</body>
</html>

EXTENSION TYPES
 Robots
 Software backed wave participants
 Commonly used for automated tasks
 Can interact with the conversation based on their
capabilities
 Gadgets
 Shared programs which run within the wave
 All participants of the wave have access to it

ROBOT VS. GADGET COMPARISON
Robot Gadget
 Runs on application servers  Runs within the wave client
and interact with the wave itself
over a protocol  A gadget can have multiple
 Only one instance of each instances, one per participant
robot per wave interacting with it
 Robots can modify a wave  Gadgets can’t modify a wave
and perform the same and have limited visibility
operations as human into the wave
participant  Gadgets don’t know that a
 Robots can modify a Gadget robot exists and can’t modify
it

WAVE GADGET ARCHITECTURE
John’s Multiple clients talking to the Wave Server using Wave
client XML
Gadget in
iFrame
Jane’s Bill’s client
client
Wave
HXML

Wave Server

HELLO WORLD GADGET
<?xml version="1.0"
encoding="UTF-8" ?>
declares that the gadget has
<Module> access to the Wave Gadgets API
<ModulePrefs title="Hello
Wave">
<Require feature="wave" />
</ModulePrefs>
<Content type="html">
<![CDATA[
Hello, Wave!
]]>
</Content>
</Module>

WAVE GADGET API
 Wave
 getParticipants(), getState(), getMode(), getTime(),
getViewer(), getHost(), setParticipantCalback(),
setStateCallback()
 State
 getKeys(), submitDelta(delta), submitValue(delta),
getKey(kep, opt_default)
 Participant
 getId(), getDisplayName(), getThumbnailUrl()

WAVE ROBOT ARCHITECTURE
John’s
client
Wave Server

Robot Linky
Spelly Proxy

App Engine

*Currently all robots run on App
Engine

WAVE ROBOT API
 Model
 TextView,
 GadgetView
 FormView
 Events
 Wavelets (BlipCreate, ParticipantChange, TitleChanged
 Blips (ContributorsChanged, BlipDeleted,
BlipSubmitted, DocumentChanged)
 Form (ButtonClicked)

WAVE ROBOT API (cont.)
 Operations
 Wavelet (AppendBlip, AddParticipant, Create,
RemoveSelf, SetDataDoc, SetTitle, CreateBlip)
 Blip (CreateChild, Delete)
 Annotation (Delete, Set)
 Document (Append, AppendStyleId, Insert, Delete,
Replace, Elements, InlineBlip

ROBOT EXAMPLES
 Polly
 Handles the flow of polling
 Uses input forms within wave
 Bloggy
 Publishes waves to a blog
 Linky
 Generates URL links in blips
 Tweety
 Synch between waves and Twitter

GOOGLE WAVE RESOURCES
 Google Wave Main Hub
 http://wave.google.com/
 Wave Account Signup:
 Developer - https://services.google.com/fb/forms/wavesignupfordev/
 Non-developer - https://services.google.com/fb/forms/wavesignup/
 Google Wave API
 http://code.google.com/apis/wave/
 Google Wave Protocol
 http://www.waveprotocol.org/
 Google Wave Developer Blog
 http://googlewavedev.blogspot.com/
 Google Wave Discussion Groups
 Google Wave API – http://groups.google.com/group/google-wave-api
 Google Wave Protocol - http://groups.google.com/group/wave-protocol

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