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Java EE 7 et ensuite pourquoi pas JavaScript sur le serveur!

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Project Avatar:
Server Side JavaScript on the JVM
Lyon JUG - March 2014
!
David Delabassee
@delabassee
Software Evangelist - Oracle
Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!2
The following is intended to outline our general product direction.
It is intended for information purposes only, and may not be
incorporated into any contract. It is not a commitment to deliver
any material, code, or functionality, and should not be relied upon
in making purchasing decisions. The development, release, and
timing of any features or functionality described for Oracle’s
products remains at the sole discretion of Oracle.
Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
Agenda
▪ Web Application Architecture Evolution
▪ JavaScript and Node on the JVM
▪ Project Avatar – Advanced JavaScript Services
▪ Avatar Client Framework
▪ Summary
!3
Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
Evolution of Web Application Architecture
!4
A Java EE Perspective
Http, REST
REST, SSE, WebSockets
Presentation
!
(Servlet/JSP,

JSF)
Connectivity


(WebSocket,

REST,SSE)
EnterpriseConnectivity

andBusinessLogic
Java EE / JVM
▪ Single-page applications
▪ View/Controller in browser
▪ Model on server
View
Controller
JavaScript
Browser
ClientServer
Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
Java EE – The Latest in Enterprise Java
!5
ENTERPRISE
EDITIONDEVELOPER
PRODUCTIVITY
MEETING 

ENTERPRISE
DEMANDS
Java EE 7
▪ Batch
▪ Concurrency
▪ Simplified JMS
▪ More annotated POJOs
▪ Less boilerplate code
▪ Cohesive integrated 

platform
▪ WebSockets
▪ JSON
▪ Servlet 3.1 NIO
▪ REST
Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.
Node.js
▪ Server-side JavaScript based on Chrome v8 engine
▪ Created by Ryan Dahl (2009), Open Source
▪ Designed for fast, scalable network applications
▪ Event-driven, non-blocking I/O model
▪ “Melting pot community”
▪ JavaScript, Java, .NET, PHP, …
▪ Very active, with 60,000+ modules
!6
Server Side JavaScript

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Java EE 7 et ensuite pourquoi pas JavaScript sur le serveur!

  • 1. Project Avatar: Server Side JavaScript on the JVM Lyon JUG - March 2014 ! David Delabassee @delabassee Software Evangelist - Oracle
  • 2. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!2 The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle.
  • 3. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Agenda ▪ Web Application Architecture Evolution ▪ JavaScript and Node on the JVM ▪ Project Avatar – Advanced JavaScript Services ▪ Avatar Client Framework ▪ Summary !3
  • 4. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Evolution of Web Application Architecture !4 A Java EE Perspective Http, REST REST, SSE, WebSockets Presentation ! (Servlet/JSP,
 JSF) Connectivity 
 (WebSocket,
 REST,SSE) EnterpriseConnectivity
 andBusinessLogic Java EE / JVM ▪ Single-page applications ▪ View/Controller in browser ▪ Model on server View Controller JavaScript Browser ClientServer
  • 5. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Java EE – The Latest in Enterprise Java !5 ENTERPRISE EDITIONDEVELOPER PRODUCTIVITY MEETING 
 ENTERPRISE DEMANDS Java EE 7 ▪ Batch ▪ Concurrency ▪ Simplified JMS ▪ More annotated POJOs ▪ Less boilerplate code ▪ Cohesive integrated 
 platform ▪ WebSockets ▪ JSON ▪ Servlet 3.1 NIO ▪ REST
  • 6. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Node.js ▪ Server-side JavaScript based on Chrome v8 engine ▪ Created by Ryan Dahl (2009), Open Source ▪ Designed for fast, scalable network applications ▪ Event-driven, non-blocking I/O model ▪ “Melting pot community” ▪ JavaScript, Java, .NET, PHP, … ▪ Very active, with 60,000+ modules !6 Server Side JavaScript
  • 7. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Node.js Programming Model ▪ Multi-threading is hard ▪ Thousands of concurrent connections ▪ Deal with deadlocks and race conditions ▪ Blocking I/O is bad !7 ▪ Single threaded ▪ Event-loop ▪ Callback model ▪ Non-blocking I/O calls ▪ Heavily parallelized HTTP Callback Example:
  • 8. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Node.js Event Loop !8 Single-Threaded
 Event Loop Resource-Intensive Operations Network File System Network Compute Register Callback CompleteOperation Client Requests (Http) Response
  • 9. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!9 REST/SSE/WebSockets JavaScript View Controller JavaScript Browser ClientServer Node Evolution of Web Application Architecture ▪ Project-based end-to-end JavaScript ▪ Rapid prototyping & API layer ▪ Leverage backend resources ▪ Aggregate & transform content ▪ Return JSON to browser Mobile-enabling existing services
  • 10. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!10 Evolution of Web Application Architecture Mobile-enabling existing services ClientServer EnterpriseConnectivity
 andBusinessLogic Java EE / JVM JavaScript What if we could run Node
 alongside Java EE in
 the same JVM? View Controller JavaScript Browser REST / SSE/ WebSockets Node
  • 11. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!11 JavaScript and Node on the JVM
  • 12. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Project Nashorn ▪ ECMAScript 5.1 compliant ▪ Bundled with JDK 8 ▪ Replaces Rhino ▪ Faster (2x – 10x) ▪ More secure ▪ Java <-> JavaScript interoperability !12 JavaScript on the JVM http://download.java.net/jdk8/docs/technotes/guides/scripting/nashorn/index.html
  • 13. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Avatar.js ▪ Platform for server side JavaScript applications ▪ Requires Nashorn (JDK 8) ▪ 95% Node compatibility ▪ Use popular packages (Express, async, commander, etc) ▪ Uses same portability libraries as Node.js ▪ Limitation: No Chrome v8 native APIs ▪ Avatar.js Advantages ▪ Leverage JVM ▪ e.g. Java frameworks, libraries, tools… !13
  • 14. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Avatar.js = Node + Java !14 Leverage Java, including Threads Java JavaScript java.lang.Thread java.util.SortedSet java.math.BigInteger Node App JVM Process com.myorg.MyObj require (‘async’) postEvent() ▪ Node Programming Model ▪ Code in JavaScript ▪ Single event loop / thread ▪ Require (import) Node modules ▪ Invoke Java code ▪ Java types and libraries ▪ new java.lang.Thread(); ▪ new com.myorg.MyObj(); ▪ …
  • 15. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!15 Project Avatar:
 Advanced JavaScript Services
 
 Leveraging Java EE
  • 16. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Project Avatar ▪ Similar in spirit to Servlets, but focused on REST, WebSocket, Server Sent Event (SSE) endpoints ▪ Use familiar Node.js event-driven programming model and modules ▪ Layers on Avatar.js Node-compatible runtime ▪ Adds integrated enterprise features !16 A Server Side JavaScript Services Framework
  • 17. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Project Avatar ▪ Multi-threading, lightweight message passing, no mutable shared state ▪ HTTP listener / load-balancer managed by framework ▪ Model Store – Object Relational Mapping ▪ Messaging – JMS on Java EE container !17 Leveraging the JVM and Java EE
  • 18. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Avatar Architecture !18 Server side Server Database Data Notification JDK 8 / Nashorn Avatar Runtime Node Modules Avatar Modules Server Runtime (Java EE) Application Services = Java framework = JavaScript framework = Application code Avatar.js
  • 19. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Avatar Services !19 Multi-core, state sharing, data storage Java JVM Process JavaScript Services Services ServicesServices Database Data Notification shared state JSON JSON JSON JSON HTTP Load Balancer
  • 20. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Shared State ▪ MessageBus ▪ Publish/subscribe message passing ▪ Shared State ▪ Simple map API ▪ Application-scoped instance ▪ Session-scoped instance ▪ Named ▪ Leased, with configurable timeout ▪ Provide required serialization, concurrency, and caching !20 Lightweight inter-thread communication
  • 21. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Shared State Example !21 var avatar = require(‘org/glassfish/avatar’);! var threads = require(‘org/glassfish/avatar/threads’);! var app = avatar.application;! var name = app.name;! var bus = app.bus;! ! // Listen for messages on the ‘alert’ topic! bus.on(‘alert’, function(msg) {! print(name + ‘ got ‘ + msg); ! });! ! // Start a background thread which publishes to the ‘alert’ topic! // Background threads do not participate in request processing! threads.newBackgroundThread(‘background’, ‘monitor.js’).start();!
  • 22. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Push Service Example !22 var avatar = require(‘org/glassfish/avatar’);! var threads = require('org/glassfish/avatar/threads');! var bus = avatar.application.bus;! ! // Register a push service that forwards background messages! avatar.registerPushService({url: 'push/message'}, function () { ! this.onOpen = function (context) {! bus.on(’background', function(msg) {! context.sendMessage({body: msg});! });! };! });! ! // Create and start a background thread that publishes messages! threads.newBackgroundThread(‘background’, ‘monitor.js’).start();!
  • 23. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. WebSocket Service Example !23 // Load avatar module! var avatar = require(‘org/glassfish/avatar’); !! // Register service instance! avatar.registerSocketService({ url:‘websocket/chat’ },function() { ! this.data = { transcript : ‘’ };!
 this.onMessage = function (peer, message) {
 this.data.transcript += message;
 this.data.transcript += ‘n’;
 peer.getContext().sendAll(this.data);! };! });!
  • 24. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Model-Store Framework ▪ JavaScript ORM library ▪ Pure JavaScript API that ▪ Supports relational and non-relational databases ▪ Integration with other Avatar services ▪ Similar to pure Node.js libraries ▪ Sequelize, JugglingDB, db… !24
  • 25. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Model-Store API !25 Model and Database setup var Product = avatar.newModel({! "name": {! type: "string",! primary: true! },! "price": "number",! "quantity": "integer"! });! var store = avatar.newStore(‘mysql’, {! host: ‘localhost’,! port: 3306,! database: ‘test’,! username: ‘someUser’,! password: ‘gu3ssIt’,! createDb: true,! dropTables: true! });!
  • 26. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Model-Store Example !26 Creating and Storing an Object // Binds Product model with store! Product.bind(store); ! // Insert a new product into the db! store.connect(function() { Product.create({ name: 'Widget',! price: 1.00, quantity: 2 }, function(err, w1) { console.log(JSON.stringify(w1)); store.disconnect(function() { // Done! }); }); }); ▪ Bind Model to Store ! ▪ Connect to Store ▪ Creates Product table if required ▪ Callback adds product to table
  • 27. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Model-Store Example !27 Relationships var Family = avatarModel.newModel('family',{! "name": {! type: "string",! primary: true! },! "description": "string"! });! ! var Product = avatarModel.newModel('product',{! "name": {! type: "string",! primary: true! },! "madeBy": "string",! "price": "number",! "quantity": "integer"! });! ! Family.hasMany(Product, {! as: 'products',! foreign: 'family'! });! ! store.bind(Family, Product); …! // for a given ‘f’! f.products.create(o).then(function(p) {! // Creating prod. (p.name) ! // in family (f.name)! …
  • 28. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Model-Store API ▪ Models can have relationships with other models ▪ 1:1, 1:n, M,N ▪ Relational Data Stores ▪ Tested: Oracle DB, MySQL, Derby (Embedded, Network) ▪ Non-tested: Any other JDBC driver ▪ Non-relational Data Stores ▪ Oracle NoSQL, MongoDB (in progress) !28
  • 29. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Model-Store API ▪ Lots of possibilities and ideas ▪ Configure JPA provider using properties ▪ Generate JavaScript model from database schema ▪ User transactions ▪ 2nd level JPA cache, TopLink Grid ▪ Oracle RAC Support, … ▪ Maintain pure JavaScript API ▪ We’re looking for YOUR feedback! !29 Opportunities to leverage JPA
  • 30. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!30 Avatar Client Framework
  • 31. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Avatar Client Model ▪ View ▪ Extensible component views ▪ Pre-defined Widget Sets: jQuery UI (default), jQuery Mobile, Dijit ▪ Declarative UI components ▪ Model ▪ Models (WS, SSE, REST, local) in JavaScript ▪ Easily connects to Java and JavaScript services ▪ Model library usable as standalone JavaScript file ▪ Misc. ▪ Familiar syntax in HTML with “data-” tags ▪ Bidirectional Data binding using EL (Expression Language) ▪ CSS support ▪ AMD modules for code partitioning !31
  • 32. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Avatar Architecture - Server and Client !32 Server Client REST/WebSocket/SSE *.html *.css *.js HTP Database Data Notification JDK 8 / Nashorn Avatar Compiler Avatar Runtime Node Modules Avatar Modules Server Runtime (Java EE) Application Services Application Views = Java framework = JavaScript framework = Application code Avatar.js
  • 33. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Hello World !33 <script data-model=”local” data-instance="name">!        var NameModel = function() {!              this.first = "John";!              this.last = "Doe";!              this.clear = function() { this.first = this.last = "”; }; ! };! </script>! View <form>! <label for="first">First Name</label>! <input id="first" type="text” data-value="#{name.first}"/>! <label for=“last">Last Name</label>! <input id=“last" type="text” data-value="#{name.last}"/>! Hello #{name.first} #{name.last}! <button onclick="#{name.clear()}”>Clear</button>! </form>! Model
  • 34. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Chat WebSocket Example !34 <script data-model="socket">! var ChatModel = function() {! …! this.sendMsg = function() {! this.send(this.user + ":" + this.message);! this.message = "";! };! };! </script>! ! <script data-type="ChatModel" data-instance="chat”! data-url=“websocket/chat”>! </script>!
  • 35. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved.!35 Project Avatar
  • 36. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Summary !36 Server-side JavaScript on the JVM ▪ Leverage the JVM ▪ Multi-threading optimizations ▪ Share state across threads, JVMs ▪ Built-in load balancing across threads ▪ Leverage Java EE services ▪ Deploy on existing Java EE infrastructure ▪ Leverage AppServer features (clustering, lifecycle management)
  • 37. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Status !37 ▪ Launched JavaOne 2013 ▪ GlassFish 4.0 Open Source Edition ▪ Open Source ▪ 2014 ▪ Add WebLogic runtime ▪ 2015 ▪ Commercial support?
  • 38. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Next steps !38 1) Download https://avatar.java.net/ 2) Try it out ! 3) Give us feedback https://avatar.java.net/mailing.html
  • 39. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2014, Oracle and/or its affiliates. All rights reserved. Merci! !39 Project Avatar https://avatar.java.net/ ! Java EE 8 Survey http://glassfish.org/survey
  • 40. Copyright © 2014, Oracle and/or its affiliates. All rights reserved.Copyright © 2013, Oracle and/or its affiliates. All rights reserved. Insert Information Protection Policy Classification from Slide 12!40 Graphic Section Divider