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  • JMaghreb 2012 Trip Report

    - by arungupta
    JMaghreb is the inaugural Java conference organized by Morocco JUG. It is the biggest Java conference in Maghreb (5 countries in North West Africa). Oracle was the exclusive platinum sponsor with several others. The registrations had to be closed at 1412 for the free conference and several folks were already on the waiting list. Rabat with 531 registrations and Casablanca with 426 were the top cities. Some statistics ... 850+ attendees over 2 days, 500+ every day 30 sessions were delivered by 18 speakers from 10 different countries 10 sessions in French and 20 in English 6 of the speakers spoke at JavaOne 2012 8 will be at Devoxx Attendees from 5 different countries and 57 cities in Morocco 40.9% qualified them as professional and rest as students Topics ranged from HTML5, Java EE 7, ADF, JavaFX, MySQL, JCP, Vaadin, Android, Community, JCP Java EE 6 hands-on lab was sold out within 7 minutes and JavaFX in 12 minutes I gave the keynote along with Simon Ritter which was basically a recap of the Strategy and Technical keynotes presented at JavaOne 2012. An informal survey during the keynote showed the following numbers: 25% using NetBeans, 90% on Eclipse, 3 on JDeveloper, 1 on IntelliJ About 10 subscribers to free online Java magazine. This digital magazine is a comprehensive source of information for everything Java - subscribe for free!! About 10-15% using Java SE 7. Download JDK 7 and get started today! Even JDK 8 builds have been available for a while now. My second talk explained the core concepts of WebSocket and how JSR 356 is providing a standard API to build WebSocket-driven applications in Java EE 7. TOTD #183 explains how you can easily get started with WebSocket in GlassFish 4. The complete slide deck is available: Next day started with a community keynote by Sonya Barry. Some of us live the life of JCP, JSR, EG, EC, RI, etc every day, but not every body is. To address that, Sonya prepared an excellent introductory presentation providing an explanation of these terms and how java.net infrastructure supports Java development. The registration for the lab showed there is a definite demand for these technologies in this part of the world. I delivered the Java EE 6 hands-on lab to a packed room of about 120 attendees. Most of the attendees were able to progress and follow the lab instructions. Some of the attendees did not have a laptop but were taking extensive notes on paper notepads. Several attendees were already using Java EE 6 in their projects and typically they are the ones asking deep dive questions. Also gave out three copies of my recently released Java EE 6 Pocket Guide and new GlassFish t-shirts. Definitely feels happy to coach ~120 more Java developers learn standards-based enterprise Java programming. I also participated in a JCP BoF along with Werner, Sonya, and Badr. Adotp-a-JSR, java.net infrastructure, how to file a JSR, what is an RI, and other similar topics were discussed in a candid manner. You can follow @JMaghrebConf or check out their facebook page. java.net published a timely conversation with Badr El Houari - the fearless leader of the Morocco JUG team. Did you know that Morocco JUG stood for JCP EC elections (ADD LINK) ? Even though they did not get elected but did fairly well. Now some sample tweets from #JMaghreb ... #JMaghreb is over. Impressive for a first edition! Thanks @badrelhouari and all the @MoroccoJUG team ! Since you @speakjava : System.out.println("Thank you so much dear Tech Evangelist ! The JavaFX was pretty amazing !!! "); #JMaghreb @YounesVendetta @arungupta @JMaghrebConf Right ! hope he will be back to morocco again and again .. :) @Alji_ @arungupta @JMaghrebConf That dude is a genius ;) Put it on your wall :p @arungupta rocking Java EE 6 at @JMaghrebConf #Java #JavaEE #JMaghreb http://t.co/isl0Iq5p @sonyabarry you are an awesome speaker ;-) #JMaghreb rich more than 550 attendees in day one. Expecting more tomorrow! ongratulations @badrelhouari the organisation was great! The talks were pretty interesting, and the turnout was surprising at #JMaghreb! #JMaghreb is truly awesome... The speakers are unbelievable ! #JavaFX... Just amazing #JMaghreb Charmed by the talk about #javaFX ( nodes architecture, MVC, Lazy loading, binding... ) gotta start using it intead of SWT. #JMaghreb JavaFX is killing JFreeChart. It supports Charts a lot of kind of them ... #JMaghreb The british man is back #JMaghreb I do like him!! #JMaghreb @arungupta rocking @JMaghrebConf. pic.twitter.com/CNohA3PE @arungupta Great talk about the future of Java EE (JEE 7 & JEE 8) Thank you. #JMaghreb JEE7 more mooore power , leeess less code !! #JMaghreb They are simplifying the existing API for Java Message Service 2.0 #JMaghreb good to know , the more the code is simplified the better ! The Glassdoor guy #arungupta is doing it RIGHT ! #JMaghreb Great presentation of The Future of the Java Platform: Java EE 7, Java SE 8 & Beyond #jMaghreb @arungupta is a great Guy apparently #JMaghreb On a personal front, the hotel (Soiftel Jardin des Roses) was pretty nice and the location was perfect. There was a 1.8 mile loop dirt trail right next to it so I managed to squeeze some runs before my upcoming marathon. Also enjoyed some great Moroccan cuisine - Couscous, Tajine, mint tea, and moroccan salad. Visit to Kasbah of the Udayas, Hassan II (one of the tallest mosque in the world), and eating in a restaurant in a kasbah are some of the exciting local experiences. Now some pictures from the event (and around the city) ... And the complete album: Many thanks to Badr, Faisal, and rest of the team for organizing a great conference. They are already thinking about how to improve the content, logisitics, and flow for the next year. I'm certainly looking forward to JMaghreb 2.0 :-)

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  • NFJS Central Iowa Software Symposium Des Moines Trip Report

    - by reza_rahman
    As some of you may be aware, I recently joined the well-respected US based No Fluff Just Stuff (NFJS) Tour. If you work in the US and still don't know what the No Fluff Just Stuff (NFJS) Tour is, you are doing yourself a very serious disfavor. NFJS is by far the cheapest and most effective way to stay up to date through some world class speakers and talks. Following the US cultural tradition of old-fashioned roadshows, NFJS is basically a set program of speakers and topics offered at major US cities year round. The NFJS Central Iowa Software Symposium was held August 8 - 10 in Des Moines. The attendance at the event and my sessions was moderate by comparison to some of the other shows. It is one of the few events of it's kind that take place this part the country so it is extremely important. I had five talks total over two days, more or less back-to-back. The first one was my JavaScript + Java EE 7 talk titled "Using JavaScript/HTML5 Rich Clients with Java EE 7". This talk is basically about aligning EE 7 with the emerging JavaScript ecosystem (specifically AngularJS). The slide deck for the talk is here: JavaScript/HTML5 Rich Clients Using Java EE 7 from Reza Rahman The demo application code is posted on GitHub. The code should be a helpful resource if this development model is something that interests you. Do let me know if you need help with it but the instructions should be fairly self-explanatory. I am delivering this material at JavaOne 2014 as a two-hour tutorial. This should give me a little more bandwidth to dig a little deeper, especially on the JavaScript end. The second talk (on the second day) was our flagship Java EE 7/8 talk. Currently the talk is basically about Java EE 7 but I'm slowly evolving the talk to transform it into a Java EE 8 talk as we move forward. The following is the slide deck for the talk: JavaEE.Next(): Java EE 7, 8, and Beyond from Reza Rahman The next talk I delivered was my Cargo Tracker/Java EE + DDD talk. This talk basically overviews DDD and describes how DDD maps to Java EE using code examples/demos from the Cargo Tracker Java EE Blue Prints project. Applied Domain-Driven Design Blue Prints for Java EE from Reza Rahman The third was my talk titled "Using NoSQL with ~JPA, EclipseLink and Java EE". The talk covers an interesting gap that there is surprisingly little material on out there. The talk has three parts -- a birds-eye view of the NoSQL landscape, how to use NoSQL via a JPA centric facade using EclipseLink NoSQL, Hibernate OGM, DataNucleus, Kundera, Easy-Cassandra, etc and how to use NoSQL native APIs in Java EE via CDI. The slides for the talk are here: Using NoSQL with ~JPA, EclipseLink and Java EE from Reza Rahman The JPA based demo is available here, while the CDI based demo is available here. Both demos use MongoDB as the data store. Do let me know if you need help getting the demos up and running. I finishd off the event with a talk titled Building Java HTML5/WebSocket Applications with JSR 356. The talk introduces HTML 5 WebSocket, overviews JSR 356, tours the API and ends with a small WebSocket demo on GlassFish 4. The slide deck for the talk is posted below. Building Java HTML5/WebSocket Applications with JSR 356 from Reza Rahman The demo code is posted on GitHub: https://github.com/m-reza-rahman/hello-websocket. My next NFJS show is the Greater Atlanta Software Symposium on September 12 - 14. Here's my tour schedule so far, I'll keep you up-to-date as the tour goes forward: September 12 - 14, Atlanta. September 19 - 21, Boston. October 17 - 19, Seattle. I hope you'll take this opportunity to get some updates on Java EE as well as the other useful content on the tour?

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  • Java Spotlight Episode 105: Mark Reinhold on the Future of Java

    - by Roger Brinkley
    Our yearly interview with Mark Reinhold, Chief Java Architect, Java Platform Group on the future of Java. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News Two Java Update Releases New Java SE 6 software updates from Apple for OS X 10.8, 10.7 and 10.6 are now live and available to all customers via the Mac App Store / Software Update. The JavaFX Community Site on Java.net JSR 360: Connected Limited Device Configuration 8 JSR 361: Java ME Embedded Profile 2012 JCP EC Election Ballot open Meet the EC Candidates Recording and Materials Events Oct 22-23, Freescale Technology Forum - Japan, Tokyo, Japan Oct 23-25, EclipseCon Europe, Ludwigsburg, Germany Oct 30-Nov 1, Arm TechCon, Santa Clara, United States of America Oct 31, JFall, Hart van Holland, Netherlands Nov 2-3, JMaghreb, Rabat, Morocco Nov 5-9, Øredev Developer Conference, Malmö, Sweden Nov 13-17, Devoxx, Antwerp, Belgium Nov 20-22, DOAG 2012, Nuremberg, Germany Dec 3-5, jDays, Göteborg, Sweden Dec 4-6, JavaOne Latin America, Sao Paolo, Brazil Feature InterviewMark Reinhold is Chief Architect of the Java Platform Group at Oracle, where he works on the Java Platform, Standard Edition, and OpenJDK. His past contributions to the platform include character-stream readers and writers, reference objects, shutdown hooks, the NIO high-performance I/O APIs, library generification, and service loaders. Mark was the lead engineer for the 1.2 and 5.0 releases and the specification lead for Java SE 6. He is currently leading the Jigsaw and JDK 7 Projects in the OpenJDK Community. Mark holds a Ph.D. in Computer Science from the Massachusetts Institute of Technology. In this interview he discusses the future of Java Platform with regards to Jigsaw, Lambda, and Nashorn components as well as the OpenJDK community. What’s Cool QotD: Ubuntu 12.10 Release Notes on OpenJDK 7 New Lambda binary drop Development forest for Compact Profiles (JEP 161)

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  • Tab Sweep - Upgrade to Java EE 6, Groovy NetBeans, JSR310, JCache interview, OEPE, and more

    - by alexismp
    Recent Tips and News on Java, Java EE 6, GlassFish & more : • Implementing JSR 310 (New Date/Time API) in Java 8 Is Very Strongly Favored by Developers (java.net) • Upgrading To The Java EE 6 Web Profile (Roger) • NetBeans for Groovy (blogs.oracle.com) • Client Side MOXy JSON Binding Explained (Blaise) • Control CDI Containers in SE and EE (Strub) • Java EE on Google App Engine: CDI to the Rescue - Aleš Justin (jaxenter) • The Java EE 6 Example - Testing Galleria - Part 4 (Markus) • Why is OpenWebBeans so fast? (Strub) • Welcome to the new Oracle Enterprise Pack for Eclipse Blog (blogs.oracle.com) • Java Spotlight Episode 75: Greg Luck on JSR 107 Java Temporary Caching API (Spotlight Podcast) • Glassfish cluster installation and administration on top of SSH + public key (Paulo) • Jfokus 2012 on Parleys.com (Parleys) • Java Tuning in a Nutshell - Part 1 (Rupesh) • New Features in Fork/Join from Java Concurrency Master, Doug Lea (DZone) • A Java7 Grammar for VisualLangLab (Sanjay) • Glassfish version 3.1.2: Secure Admin must be enabled to access the DAS remotely (Charlee) • Oracle Announces the Certification of the Oracle Database on Oracle Linux 6 and Red Hat Enterprise Linux 6

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  • WebSocket Samples in GlassFish 4 build 66 - javax.websocket.* package: TOTD #190

    - by arungupta
    This blog has published a few blogs on using JSR 356 Reference Implementation (Tyrus) integrated in GlassFish 4 promoted builds. TOTD #183: Getting Started with WebSocket in GlassFish TOTD #184: Logging WebSocket Frames using Chrome Developer Tools, Net-internals and Wireshark TOTD #185: Processing Text and Binary (Blob, ArrayBuffer, ArrayBufferView) Payload in WebSocket TOTD #186: Custom Text and Binary Payloads using WebSocket TOTD #189: Collaborative Whiteboard using WebSocket in GlassFish 4 The earlier blogs created a WebSocket endpoint as: import javax.net.websocket.annotations.WebSocketEndpoint;@WebSocketEndpoint("websocket")public class MyEndpoint { . . . Based upon the discussion in JSR 356 EG, the package names have changed to javax.websocket.*. So the updated endpoint definition will look like: import javax.websocket.WebSocketEndpoint;@WebSocketEndpoint("websocket")public class MyEndpoint { . . . The POM dependency is: <dependency> <groupId>javax.websocket</groupId> <artifactId>javax.websocket-api</artifactId> <version>1.0-b09</version> </dependency> And if you are using GlassFish 4 build 66, then you also need to provide a dummy EndpointFactory implementation as: import javax.websocket.WebSocketEndpoint;@WebSocketEndpoint(value="websocket", factory=MyEndpoint.DummyEndpointFactory.class)public class MyEndpoint { . . .   class DummyEndpointFactory implements EndpointFactory {    @Override public Object createEndpoint() { return null; }  }} This is only interim and will be cleaned up in subsequent builds. But I've seen couple of complaints about this already and so this deserves a short blog. Have you been tracking the latest Java EE 7 implementations in GlassFish 4 promoted builds ?

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  • Java Spotlight Episode 112: Joonas Lehiten on @Vaadin

    - by Roger Brinkley
    Interview with Joonas Lehtinen on Vaadin. Right-click or Control-click to download this MP3 file. You can also subscribe to the Java Spotlight Podcast Feed to get the latest podcast automatically. If you use iTunes you can open iTunes and subscribe with this link:  Java Spotlight Podcast in iTunes. Show Notes News Java Smart Metering video JavaFX for Tablets and Mobile survey on FXExperience Muliple JSR Migrating to the Latest JCP Version A number of JEPs added to  JDK 8 features and JDK 8 Milestones Adopt-a-JSR for Java EE 7 Events Dec 14-15, IndicThreads, Pune, India Dec 20, 9:30am JCP Spec Lead Call December on Developing a TCK Jan 15-16, JCP EC Face to Face Meeting, West Coast USA Feature InterviewJoonas Lehtinen started the development of Vaadin, a Java-based open source framework for building business-oriented Rich Internet Applications. He has been developing applications for the web since 1995 with a strong focus on Ajax and Java. He is also the founder and CEO of the company behind the Vaadin framework. What’s Cool Hinkmond Wong’s work with RasberryPI and Java Embedded GPIO Collaborative Whiteboard using WebSocket

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  • One Does Like To Code: DevoxxUK

    - by Tori Wieldt
    What's happening at Devoxx UK? I'll be talking to Rock Star speakers, Community leaders, authors, JSR leads and more.  This video is a short introduction.   Check out these great sessions: Thursday, June 12Perchance to Stream with Java 8by Paul Sandoz13:40 - 14:30 | Room 1 Making the Internet-of-Things a Reality with Embedded Javaby Simon Ritter11:50 - 12:40 | Room 4 Java SE 8 Lambdas and Streams Labby Simon Ritter17:00 - 20:00 | Room Mezzanine Safety Not Guaranteed: Sun. Misc. Unsafe and the Quest for Safe Alternativesby Paul Sandoz18:45 - 19:45 | Room 3 Join the Java EvolutionHeather VanCuraPatrick Curran19:45 – 20:45 | Room 2  Glassfish is Here to StayDavid DelabasseeAntonio Goncalves19:45 – 20:45 | Room Expo Here is the full line-up of sessions. Devoxx UK includes a Hackergarten, where can devs work an Open Source project of their choice. The Adopt OpenJDK and Adopt a JSR Program folks will be there to help attendees contribute back to Java SE and Java EE itself!   Saturday includes a special Devoxx4Kids event in conjunction with the London Java Community. It's design to teach 10-16 year-olds simple programming concepts, robotics, electronics, and games making. Workshops include LEGO Mindstorms (robotic engineering), Greenfoot (programming), Arduino (electronics), Scratch (games making), Minecraft Modding (game hacking) and NAO (robotic programming). Small fee, you must register. If you can't attend Devoxx UK in person, stay tuned to the YouTube/Java channel. I'll be doing plenty of interviews so you can join the fun from around the world. 

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  • Meet up with the JCP at JavaOne Latin America

    - by Heather VanCura
    The JCP made it to JavaOne Brazil!  We had a quickie presentation earlier today on JCP.Next that was well attended.  Come to see us at@ the  OTN mini-theatre tomorrow from 12:00-12:15 pm for a quickie on participation.  Then make your way to the Mazanino Sala 12 at 12:30 pm for CON-22250.  "The Java Community Process: How You Can Make a Positive Difference" will be presented with Heather VanCura, JCP,  and Fabio Velloso, SouJava, on Thursday, 6 December, at 12:30 pm.  Find out more about how to participate in the JCP program, the JCP.Next effort and how to get involved with Adopt-a-JSR through your JUG (or on your own)!  Here is the description in Portuguese: A JCP desempenha um papel fundamental na evolução do Java. A sessão vai enfatizar o valor da transparência e participação através da JCP, Grupos de Usuários Java e do programa Adote um JSR. Vamos explorar também algumas das mudanças futuras no processo através da iniciativa JCP.Next, e explicar como você pode se envolver. Traga suas dúvidas, suas sugestões, e suas preocupações. Nós queremos ouvir de você, e incentivá-lo e facilitar a sua participação ativa no avanço da plataforma Java

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  • Meet the Spec Leads & Active JSRs

    - by heathervc
    For your Monday reading pleasure, the JCP has published Spec Lead Profiles of In Progress/Active JSRs--there are 35 of these Spec Leads!  Find out more about these dedicated community leaders.  In preparing these profiles, the PMO also asked Specification Leads to tell about their experiences  as Spec Leads.  There were many themes that emerged around transparency, openness, agility and participation.  This led to a related article for those interested in learning about the experience of participating in the development of a Java Specification through the JCP program, see: "Active Specification Leads Offer Best Practices and Tips for Success". In Progress/Active JSRs were also reported on in the PMO Presentation during the last JCP EC Face-to-Face meeting in September 2012.   Now is a good time to start thinking about nominations for Star Spec Leads.  Nominations for 2012 are now open.  Anyone can submit a nomination for Star Spec Lead; however, we ask that you nominate an active JSR Spec Lead, operating a JSR under JCP program version 2.8 (introduced October 2011) or above.  Nominations close 31 December 2012.

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  • Session Report: What’s New in JSF: A Complete Tour of JSF 2.2

    - by Janice J. Heiss
    On Wednesday, Ed Burns, Consulting Staff Member at Oracle, presented a session, CON3870 -- “What’s New in JSF: A Complete Tour of JSF 2.2,” in which he provided an update on recent developments in JavaServer Faces 2.2. He began by emphasizing that, “JavaServer Faces 2.2 continues the evolution of the Java EE standard user interface technology. Like previous releases, this iteration is very community-driven and transparent.” He pointed out that since JSF was introduced at the 2001 JavaOne Keynote, it has had a long and successful run and has found a home in applications where the UI logic resides entirely on the server where the model and UI logic is. In such cases, the browser performs fairly simple functions. However, developers can take advantage of the power of browsers, something that Project Avatar is focused on by letting developers author their applications so the UI logic is running on the client and communicating to the back end via RESTful web services. “Most importantly,” remarked Burns, “JSF 2.2 offers a really good migration path because even in the scope of one application you could have an app written with JSF that has its UI logic on the server and, on a gradual basis, you could migrate parts of the app over to use client-side technologies. This can be done at any level of granularity – per page or per collection of pages. It all depends on what you want to do.” His presentation, which focused on the basic new features of JSF 2.2, began by restating the scope of JSF and encouraged attendees to check out Roger Kitain’s session: CON5133 “Techniques for Responsive Real-Time Web UIs.” Burns explained that JSF has endured because, “We still need web apps that are maintainable, localizable, quick to build, accessible, secure, look great and are fun to use.” It is used on every continent – the curious can go here to check out where its unofficial usage is tracked. He emphasized the significance of the UI logic being substantially on the server. This: Separates Component Semantics from Rendering, Allows components to “own” their little patch of the UI -- encode/decode, And offers a well-defined lifecycle: Inversion of Control. Burns reminded attendees that JSR-344, the spec for JSF 2.2, is now on Java Community Process 2.8, a revised version of the JCP that allows for more openness and transparency. He then offered some tools for community access to JSF 2.2:    * Public java.net projects spec http://jsf-spec.java.net/ impl http://jsf.java.net/ Open Source: GPL+Classpath Exception    * Mailing Lists [email protected]                                Public readable archive, JSPA signed member read/write [email protected]                                     Public readable archive, any java.net member read/write                         All mail sent to jsr344-experts is sent to users. * Issue Tracker spec http://jsf-spec.java.net/issues/ impl http://jsf.java.net/issues/ JSF 2.2, which is JSR 344, has a Public Review Draft planned by December 2012 with no need for a Renewal Ballot. The Early Draft Review of JSR 344 was published on December 8, 2011. Interested developers are encouraged to offer their input. Six Big Ticket Features of JSF 2.2 Burns summarized the six big ticket features of JSF 2.2:* HTML5 Friendly Markup Support Pass through attributes and elements * Faces Flows* Cross Site Request Forgery Protection* Loading Facelets via ResourceHandler* File Upload Component* Multi-Templating He explained that he called it “HTML 5 friendly” because there is really nothing HTML 5 specific about it -- it could be 4. But it enables developers to use new elements that are present in HTML5 without having a JSF component library that is written to take advantage of those specifically. It gives the page author the ability to use plain HTML5 to write their page, but to still take advantage of the server-side available in JSF. He presented a demo showing JSF 2.2’s ability to leverage the expressiveness of HTML5. Burns then explained the significance of face flows, which offer function points and quantify how much work has taken place, something of great value to JSF users. He went on to talk about JSF 2.2.’s cross-site request forgery protection (CSRF) and offered details about how it protects applications against attack. Then he talked about JSF 2.2’s File Upload Component and explained that the final specification will have Ajax and non-Ajax support. The current milestone has non-Ajax support implemented. He then went on to explain its capacity to add facelets through ResourceHandler. Previously, JSF 2.0 added Facelets and ResourceHandler as disparate units; now in JSF 2.2 the two concepts are unified. Finally, he explained the concept of multi-templating in JSF 2.2 and went on to discuss more medium-level features of the release. For an easy, low maintenance way of staying in touch with JSF developments go to JSF’s Twitter page where every month or so, important updates are offered.

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  • Collaborative Whiteboard using WebSocket in GlassFish 4 - Text/JSON and Binary/ArrayBuffer Data Transfer (TOTD #189)

    - by arungupta
    This blog has published a few blogs on using JSR 356 Reference Implementation (Tyrus) as its integrated in GlassFish 4 promoted builds. TOTD #183: Getting Started with WebSocket in GlassFish TOTD #184: Logging WebSocket Frames using Chrome Developer Tools, Net-internals and Wireshark TOTD #185: Processing Text and Binary (Blob, ArrayBuffer, ArrayBufferView) Payload in WebSocket TOTD #186: Custom Text and Binary Payloads using WebSocket One of the typical usecase for WebSocket is online collaborative games. This Tip Of The Day (TOTD) explains a sample that can be used to build such games easily. The application is a collaborative whiteboard where different shapes can be drawn in multiple colors. The shapes drawn on one browser are automatically drawn on all other peer browsers that are connected to the same endpoint. The shape, color, and coordinates of the image are transfered using a JSON structure. A browser may opt-out of sharing the figures. Alternatively any browser can send a snapshot of their existing whiteboard to all other browsers. Take a look at this video to understand how the application work and the underlying code. The complete sample code can be downloaded here. The code behind the application is also explained below. The web page (index.jsp) has a HTML5 Canvas as shown: <canvas id="myCanvas" width="150" height="150" style="border:1px solid #000000;"></canvas> And some radio buttons to choose the color and shape. By default, the shape, color, and coordinates of any figure drawn on the canvas are put in a JSON structure and sent as a message to the WebSocket endpoint. The JSON structure looks like: { "shape": "square", "color": "#FF0000", "coords": { "x": 31.59999942779541, "y": 49.91999053955078 }} The endpoint definition looks like: @WebSocketEndpoint(value = "websocket",encoders = {FigureDecoderEncoder.class},decoders = {FigureDecoderEncoder.class})public class Whiteboard { As you can see, the endpoint has decoder and encoder registered that decodes JSON to a Figure (a POJO class) and vice versa respectively. The decode method looks like: public Figure decode(String string) throws DecodeException { try { JSONObject jsonObject = new JSONObject(string); return new Figure(jsonObject); } catch (JSONException ex) { throw new DecodeException("Error parsing JSON", ex.getMessage(), ex.fillInStackTrace()); }} And the encode method looks like: public String encode(Figure figure) throws EncodeException { return figure.getJson().toString();} FigureDecoderEncoder implements both decoder and encoder functionality but thats purely for convenience. But the recommended design pattern is to keep them in separate classes. In certain cases, you may even need only one of them. On the client-side, the Canvas is initialized as: var canvas = document.getElementById("myCanvas");var context = canvas.getContext("2d");canvas.addEventListener("click", defineImage, false); The defineImage method constructs the JSON structure as shown above and sends it to the endpoint using websocket.send(). An instant snapshot of the canvas is sent using binary transfer with WebSocket. The WebSocket is initialized as: var wsUri = "ws://localhost:8080/whiteboard/websocket";var websocket = new WebSocket(wsUri);websocket.binaryType = "arraybuffer"; The important part is to set the binaryType property of WebSocket to arraybuffer. This ensures that any binary transfers using WebSocket are done using ArrayBuffer as the default type seem to be blob. The actual binary data transfer is done using the following: var image = context.getImageData(0, 0, canvas.width, canvas.height);var buffer = new ArrayBuffer(image.data.length);var bytes = new Uint8Array(buffer);for (var i=0; i<bytes.length; i++) { bytes[i] = image.data[i];}websocket.send(bytes); This comprehensive sample shows the following features of JSR 356 API: Annotation-driven endpoints Send/receive text and binary payload in WebSocket Encoders/decoders for custom text payload In addition, it also shows how images can be captured and drawn using HTML5 Canvas in a JSP. How could this be turned in to an online game ? Imagine drawing a Tic-tac-toe board on the canvas with two players playing and others watching. Then you can build access rights and controls within the application itself. Instead of sending a snapshot of the canvas on demand, a new peer joining the game could be automatically transferred the current state as well. Do you want to build this game ? I built a similar game a few years ago. Do somebody want to rewrite the game using WebSocket APIs ? :-) Many thanks to Jitu and Akshay for helping through the WebSocket internals! Here are some references for you: JSR 356: Java API for WebSocket - Specification (Early Draft) and Implementation (already integrated in GlassFish 4 promoted builds) Subsequent blogs will discuss the following topics (not necessary in that order) ... Error handling Interface-driven WebSocket endpoint Java client API Client and Server configuration Security Subprotocols Extensions Other topics from the API

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  • Passing paramenters on the stack

    - by oxinabox.ucc.asn.au
    When you pass parameters to a function on the cpu stack, You put the parameters on then JSR puts the return address on the stack. So than means in your function you must take the top item of the stack (the return address) before you can take the others off) eg is the following the correct way to go about it: ... |Let’s do some addition with a function, MOVE.L #4, -(SP) MOVE.L #5, -(SP) JSR add |the result of the addition (4+5) is in D0 (9) ... add: MOVE.L (SP)+, A1 |store the return address |in a register MOVE.L D0, -(SP) |get 1st parameter, put in D0 MOVE.L D2, -(SP) |get 2nd parameter, put in D0 ADD.L D2, D0 |add them, |storing the result in D0 MOVE.L A1, -(SP) |put the address back on the |Stack RTS |return

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  • Passing parameters on the stack

    - by oxinabox.ucc.asn.au
    When you pass parameters to a function on the cpu stack, You put the parameters on then JSR puts the return address on the stack. So that means in your function you must take the top item of the stack (the return address) before you can take the others off) eg is the following the correct way to go about it: ... |Let’s do some addition with a function, MOVE.L #4, -(SP) MOVE.L #5, -(SP) JSR add |the result of the addition (4+5) is in D0 (9) ... add: MOVE.L (SP)+, A1 |store the return address |in a register MOVE.L (SP)+, D0 |get 1st parameter, put in D0 MOVE.L (SP)+, D2 |get 2nd parameter, put in D2 ADD.L D2, D0 |add them, |storing the result in D0 MOVE.L A1, -(SP) |put the address back on the |Stack RTS |return

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  • Is there a J2SE sensor API?

    - by Martin Strandbygaard
    Does anyone know of a "standardized" Java API for working with sensors, and which is closely tied to J2ME as is the case with JSR 256? I'm writing a Java library for interfacing with a sensor network consisting of several different types of sensors (mostly simple stuff such as temperature, humidity, GPS, etc.). So far I've rolled my own interface, and users have to write apps against this. I would like to change this approach and implement a "standard" API so that implementations aren't that closely tied to my library. I've looked at JSR 256, but that really isn't a great solution as it's for J2ME, and my library is mostly used by Android devices or laptops running the full J2SE.

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  • Why is there no .NET Community Process?

    - by michielvoo
    I was doing some research into general topics of software engineering and I came across the Java Community Process website: The JCP is the mechanism for developing standard technical specifications for Java technology. Anyone can register for the site and participate in reviewing and providing feedback for the Java Specification Requests (JSRs), and anyone can sign up to become a JCP Member and then participate on the Expert Group of a JSR or even submit their own JSR Proposal. Seems like a good idea to me, and there are lots of very well written specifications and reference implementations on the JCP website. So why is there no .NET Community Process? Is that something that Microsoft could or should start? Maybe they could install it on Codeplex.net and hand over the keys to the community.

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  • What are the correct group and artifact id's for jee 5 and 6 artifacts?

    - by Pangea
    So far we have been manually downloading the jars and deploying to our maven repo with custom group/artifact id's. I would like to avoid that. So my question is What are the correct group and artifact id's for jee 5 and 6 artifacts? I'd like to get the names at JSR level (for example I doesn't need the ids for jee 6 uber jar but individual api's like jsr 330 etc) Which is the CORRECT repo to get these from? Does Oracle host there in their own repos?

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  • QotD: Justin Kestelyn, Editor in Chief of Java Magazine on OpenJDK

    - by $utils.escapeXML($entry.author)
    Things have changed now. Java SE 7 is available, and Java SE 8 is on the way; Java developer conferences around the world are selling out in short order; Java skills are in high demand by recruiters; and the Java community is reinvigorated thanks to efforts including the OpenJDK project, the Adopt-a-JSR program, and—if I may be so bold—even this publication.Justin Kestelyn, Editor in Chief of the Java Magazine, in the opening 'from the editor' article in the magazine's March/April edition.

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  • Project Nashorn Slides & Talks

    - by $utils.escapeXML($entry.author)
    At the Eclipse Demo Camp in Hamburg last week I got asked about resources on Project Nashorn. So, I compiled a quick list:slides from Jim Laskey's JavaOne 2011 talk titled "The Future of JavaScript in the JDK".slides from Bernard Traversat's JavaOne 2011 talk titled "HTLM5 and Java: The Facts and the Myths".slides and video from Jim Laskey's JVM Language Simmit talk titled "Adventures in JSR 292 (Nashorn)".

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  • How Portal Standards Enable Reuse

    As an IT professional, it is likely that you have heard portal buzz words including JSR 168 and WSRP. But if you are like many, you may not understand the differences or the benefits of these complementary portal standards.

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  • Tab Sweep: CDI Tutorial, Vertical Clustering, Monitoring, Vorpal, SPARC T4, ...

    - by arungupta
    Recent Tips and News on Java, Java EE 6, GlassFish & more : • Tutorial - Introduction to CDI - Contexts and Dependency Injection for Java EE (JSR 299) (Mark Struberg, Peter Muir) • Clustering with Glassfish 3.1 (Javing) • Two Way Communication in JMS (Lukasz Budnik) • Glassfish – Vertical clustering with multiple domains (Alexandru Ersenie) • Setting up Glassfish Monitoring – handling connection problems (Jacek Milewski) • Screencast: Developing Discoverable XMPP Components with Vorpal (Chuk Munn Lee) • Java EE Application Servers, SPARC T4, Solaris Containers, and Resource Pools (Jeff Taylor)

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  • Java EE 7 turns one today!

    - by delabassee
    "Tell me and I forget. Teach me and I remember. Involve me and I learn." (Benjamin Franklin) Today marks the first year anniversary of Java EE 7. The JSR 342 specification was finalised on May 28, 2013 with the official launch taking place on June 12, 2013 (original press release). As of today, there are already 3 Java EE 7 compatible Application Servers, coming from different 'vendors' (Oracle, TmaxSoft and Red Hat). Two of those Java EE 7 Application Servers are free and open source. We expect the list of Java EE 7 compatible Application Servers to grow over the coming months. Source: RebelLabs - 'Java Tools and Technologies Landscape for 2014' According to a recent independent survey, one third of the Java EE users who participated in that survey is already using Java EE 7. This is a good sign but it also means that a lot of people are not yet on Java EE 7. So if you haven't yet embarked on Java EE 7, now is really the time to do so! There are various ways to learn Java EE 7, in no particular order ... Continue to read The Aquarium. Through this blog, we are relaying Java EE news but we are also doing our best to highlight relevant technical contents such as articles, community tutorials, etc. Watch the GlassFish YouTube channel. Amongst others, it contains the different videos of the Java EE 7 launch, those videos will give you good technical update on Java EE and its different components specifications (JMS 2.0, JAX-RS 2.0, EJB 3.2, etc.) Take a formal training. Oracle University is starting to roll-out Java EE 7 trainings like the 'Java EE 7: New Features' class.  Attend conferences and JUGs sessions. On that note, we have spent a lot of time to create a strong JavaOne 'Server-Side Java' track. It's still possible to benefit from the early bird JavaOne pricing but don't wait too much! Read books. There are more than 25 (!) books related to Java EE 7 or to one of the Java EE 7 component specification.  There are many more ways to learn Java EE but if I have to suggest one and only one way, I would recommend the Java EE 7 Tutorial. It's exhaustive and clear, it's free and it continues to evolve. And finally as the introductory quote suggest, participation is key to learning. Participate in JUGs,  participate in Adopt-a-JSR, get involved in the different open source communities evolving around Java EE, participate in the JCP... in one word, participate!

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  • Oracle WebCenter: Composite Applications & Mash-Ups

    - by kellsey.ruppel(at)oracle.com
    We’ve talked in previous weeks about the key goals of the new release of WebCenter are providing a Modern User Experience, unparalleled Application Integration, converging all the best of the existing portal platforms into WebCenter and delivering a Common User Experience Architecture.  We’ve provided an overview of Oracle WebCenter and discussed some of the other key goals in previous weeks, and this week, we’ll focus on how with the new release of Oracle WebCenter you can create composite applications and mashups.We recently talked with Sachin Agarwal, Director of Product Management of Enterprise 2.0 at Oracle around the topic of Composite Applications and Mashups. Oracle WebCenter provides a rich set of tools and capabilities for pulling in content, applications and collaboration functionality from various different sources and weaving them together into what we call Mashups. Mashups that also consists of transactional applications from multiple sources are specifically called Composite Applications. With the latest release of Oracle WebCenter one can develop highly productive tasked based interfaces that aggregate a related set of applications that are part of a business process and provide in context collaboration tools so that users don’t have to navigate away to different tabs to achieve these tasks. For instance, a call center representative (CSR), not only needs to be able to pull customer information from a CRM application like Siebel, but also related information from Oracle E-Business Suite about whether a specific order has shipped. The CSR will be far more efficient if he or she does not have to open different tabs to login into multiple applications while the customer is waiting, but can access all this information in one mashup.Oracle WebCenter Suite provides a comprehensive set of tooling that enables a business user to quickly aggregate together a mashup and wire-in different backend applications to create a custom dashboard. Not only does Oracle WebCenter supports a wide set of standards (WSRP 1.0, 2.0, JSR 168, JSR 286) that allow portlets  from other applications to be surfaced within WebCenter, but it also provides tools to bring in other web applications such as .Net Applications  as well as SharePoint webparts. The new Business Mash-up editor allows business users to take any Oracle Application or 3rd party application and wire the backend data sources or APIs to a rich set of visualizations and reuse them in mashups.  Moreover, Business users can customize or personalize any page using Oracle WebCenter Composer’s on-the-fly visual page editing features. Users access and select different resource components available in Oracle WebCenter’s Business Dictionary in order to add new content to the page. The Business Dictionary provides a role-based view of available components or resources, and these components can include information from a variety of enterprise resources such as enterprise applications, managed content, rich media, business processes, or business intelligence systems. Together, Oracle WebCenter’s Composer and Business Dictionary give users access to a powerful, yet easy to use, set of tools to personalize and extend their Oracle WebCenter portals and applications without involving IT.Keep checking back this week as we share more information on how you can easily create Commposite Applications and Mashups with Oracle WebCenter .Technorati Tags: UXP, collaboration, enterprise 2.0, modern user experience, oracle, portals, webcenter, applications, mashups, composite applications

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  • Oracle WebCenter: Composite Applications & Mash-Ups

    - by kellsey.ruppel(at)oracle.com
    We’ve talked in previous weeks about the key goals of the new release of WebCenter are providing a Modern User Experience, unparalleled Application Integration, converging all the best of the existing portal platforms into WebCenter and delivering a Common User Experience Architecture.  We’ve provided an overview of Oracle WebCenter and discussed some of the other key goals in previous weeks, and this week, we’ll focus on how with the new release of Oracle WebCenter you can create composite applications and mashups.We recently talked with Sachin Agarwal, Director of Product Management of Enterprise 2.0 at Oracle around the topic of Composite Applications and Mashups. Oracle WebCenter provides a rich set of tools and capabilities for pulling in content, applications and collaboration functionality from various different sources and weaving them together into what we call Mashups. Mashups that also consists of transactional applications from multiple sources are specifically called Composite Applications. With the latest release of Oracle WebCenter one can develop highly productive tasked based interfaces that aggregate a related set of applications that are part of a business process and provide in context collaboration tools so that users don’t have to navigate away to different tabs to achieve these tasks. For instance, a call center representative (CSR), not only needs to be able to pull customer information from a CRM application like Siebel, but also related information from Oracle E-Business Suite about whether a specific order has shipped. The CSR will be far more efficient if he or she does not have to open different tabs to login into multiple applications while the customer is waiting, but can access all this information in one mashup.Oracle WebCenter Suite provides a comprehensive set of tooling that enables a business user to quickly aggregate together a mashup and wire-in different backend applications to create a custom dashboard. Not only does Oracle WebCenter supports a wide set of standards (WSRP 1.0, 2.0, JSR 168, JSR 286) that allow portlets  from other applications to be surfaced within WebCenter, but it also provides tools to bring in other web applications such as .Net Applications  as well as SharePoint webparts. The new Business Mash-up editor allows business users to take any Oracle Application or 3rd party application and wire the backend data sources or APIs to a rich set of visualizations and reuse them in mashups.  Moreover, Business users can customize or personalize any page using Oracle WebCenter Composer’s on-the-fly visual page editing features. Users access and select different resource components available in Oracle WebCenter’s Business Dictionary in order to add new content to the page. The Business Dictionary provides a role-based view of available components or resources, and these components can include information from a variety of enterprise resources such as enterprise applications, managed content, rich media, business processes, or business intelligence systems. Together, Oracle WebCenter’s Composer and Business Dictionary give users access to a powerful, yet easy to use, set of tools to personalize and extend their Oracle WebCenter portals and applications without involving IT.Keep checking back this week as we share more information on how you can easily create Commposite Applications and Mashups with Oracle WebCenter .Technorati Tags: UXP, collaboration, enterprise 2.0, modern user experience, oracle, portals, webcenter, applications, mashups, composite applications

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  • Oracle WebCenter: Composite Applications & Mash-Ups

    - by kellsey.ruppel(at)oracle.com
    We’ve talked in previous weeks about the key goals of the new release of WebCenter are providing a Modern User Experience, unparalleled Application Integration, converging all the best of the existing portal platforms into WebCenter and delivering a Common User Experience Architecture.  We’ve provided an overview of Oracle WebCenter and discussed some of the other key goals in previous weeks, and this week, we’ll focus on how with the new release of Oracle WebCenter you can create composite applications and mashups.We recently talked with Sachin Agarwal, Director of Product Management of Enterprise 2.0 at Oracle around the topic of Composite Applications and Mashups. Oracle WebCenter provides a rich set of tools and capabilities for pulling in content, applications and collaboration functionality from various different sources and weaving them together into what we call Mashups. Mashups that also consists of transactional applications from multiple sources are specifically called Composite Applications. With the latest release of Oracle WebCenter one can develop highly productive tasked based interfaces that aggregate a related set of applications that are part of a business process and provide in context collaboration tools so that users don’t have to navigate away to different tabs to achieve these tasks. For instance, a call center representative (CSR), not only needs to be able to pull customer information from a CRM application like Siebel, but also related information from Oracle E-Business Suite about whether a specific order has shipped. The CSR will be far more efficient if he or she does not have to open different tabs to login into multiple applications while the customer is waiting, but can access all this information in one mashup.Oracle WebCenter Suite provides a comprehensive set of tooling that enables a business user to quickly aggregate together a mashup and wire-in different backend applications to create a custom dashboard. Not only does Oracle WebCenter supports a wide set of standards (WSRP 1.0, 2.0, JSR 168, JSR 286) that allow portlets  from other applications to be surfaced within WebCenter, but it also provides tools to bring in other web applications such as .Net Applications  as well as SharePoint webparts. The new Business Mash-up editor allows business users to take any Oracle Application or 3rd party application and wire the backend data sources or APIs to a rich set of visualizations and reuse them in mashups.  Moreover, Business users can customize or personalize any page using Oracle WebCenter Composer’s on-the-fly visual page editing features. Users access and select different resource components available in Oracle WebCenter’s Business Dictionary in order to add new content to the page. The Business Dictionary provides a role-based view of available components or resources, and these components can include information from a variety of enterprise resources such as enterprise applications, managed content, rich media, business processes, or business intelligence systems. Together, Oracle WebCenter’s Composer and Business Dictionary give users access to a powerful, yet easy to use, set of tools to personalize and extend their Oracle WebCenter portals and applications without involving IT.Keep checking back this week as we share more information on how you can easily create Commposite Applications and Mashups with Oracle WebCenter .Technorati Tags: UXP, collaboration, enterprise 2.0, modern user experience, oracle, portals, webcenter, applications, mashups, composite applications

    Read the article

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