Friday, October 17, 2014

NetBeans PrimeFaces Lightning Talk

During JavaOne 2014, I had the pleasure to present a lightning talk covering the excellent PrimeFaces support that is offered by NetBeans 8 IDE.  Thanks to Geertjan Wielenga for inviting me to present.

I have recorded a screencast covering the lightning talk content, just in case you missed it.

Tuesday, October 14, 2014

Reflecting on JavaOne 2014 - Java 8, JavaFX 8, IoT, and Java EE 8

There were many buzz-words flying around JavaOne 2014: Java 8, JavaFX8, IoT, Java EE 8, NetBeans, Lambdas, Streams, Parallel Processing, JavaScript, DukeScript, Groovy, Scala, Drones...

To sum it all up:  Java is everywhere, and it is a dominant player in IoT, desktop, and Enterprise.

In Reflection:

After having a few days to reflect on my experiences at JavaOne 2014, a few things come to mind.

First, this was by far the most jam-packed JavaOne that I've attended.  Not only were there more attendees this year, but there also seemed to be more great sessions.  In many cases, I did not know which direction to turn, as there was usually more than one session that I wished to attend in any given time slot.

Second, the networking opportunities at JavaOne are world-class.  There are so many knowledgeable resources at JavaOne, it is worth the trip just to have the chance to speak with the industry leaders.

Third, the community really is driving Java forward.  I just recently joined the JCP, and also the JSF 2.3 Expert Group...so this year I paid particular attention to the JCP sessions.  That said, the JCP is doing an outstanding job of driving community participation, with the Java EE 8 specifications, in particular.  Throughout the conference, there were dozens of examples from around the world that spoke to the great work that the JCP has been doing...keep up the great work!

Finally, the Java ecosystem is strong, and it is gaining momentum.  Java really is everywhere...and even though I primarily focus on enterprise, it is great to see all of the many areas in which Java is being utilized.  There were many great examples and presentations of embedded Java in the IoT space specifically...can't wait to see what's in store for years to come.  All that said, this year's trip to JavaOne was great.  I was delighted to have the fortunate opportunity to present during a few different sessions this year, which made it all the better!

In the next few sections, I will provide a brief overview on most of the sessions that I attended.  Hope you will find it useful and utilize the information to help you determine which slides to download and sessions to watch on Parleys once the videos are added.

Duke's Cafe


Sunday, Sept 28:

The conference began with a bang, as the attendees in registration were talking about the days to come.  Excitement filled Moscone South, as NetBeans Day was jam packed full of useful information, and sessions covering all areas of Java.  I attended a few NetBeans community panels, which were all filled with interesting use-cases and success stories revolving around Java and the NetBeans IDE.  It was great to see all of the many different ways that people are utilizing NetBeans.

GlassFish RoadMmap and Executive Panel

This has become an annual session for me, as I am a huge fan of GlassFish. This panel was hosted by Reza Rahman, and attendees learned about the future of the application server from John Clingan, Mike Lehman, and Cameron Purdy.  GlassFish 5 is slated for release with Java EE 8, and therefore GlassFish will remain the reference implementation of Java EE.  There were questions regarding the adoption rate of Java EE...specifically around Java EE 7, since there were only a handful of compatible containers at the time.  The panel remarked that they hope to reduce the adoption time for Java EE 8, with hopes that WebLogic will release a Java EE 8 compatibility within 6 months of the Java EE 8 reference implementation release.  Glad to hear that GlassFish has a vibrant future as the reference implementation for Java EE.

GlassFish Adoption Story

Next up, I attended the GlassFish Adoption Story to learn that Mohamed Taman's team had implemented a Java card system very rapidly via GlassFish and Java EE 7.  Martin Mares, one of the talented GlassFish developers, then provided a brief demo of the powerful GlassFish admin utility.  It was great to see how others are making use of GlassFish, and it was also nice to have the opportunity to hear from one of the GlassFish developers first hand.

Java Strategy and Technical Keynote

I attended the Java Strategy and Technical keynote next.  Although it was not quite as exciting as JavaOne 2013...which included great announcements like Java EE 7 and coverage if Java 8 and JavaFX 8 new features...this keynote was inspiring, as there were many examples demonstrating great things that people are achieving with Java technology.  Watch here...

Java Strategy and Technical Keynote


NetBeans Day Sessions

I finished off the day with a couple of more NetBeans day sessions, learning how companies such as Boeing and the oil industry is making great use of NetBeans IDE.  I was privileged enough to present a lightning talk, covering some of the great NetBeans and PrimeFaces integration.  During these NetBeans Day events, I ran into some great Java minds...too many to name!  In my session alone, I had the honor to present with Tim Boudreau, Kirk Pepperdine, Stephen Reinert, and Martijn Verburg.  It was a great experience to have the opportunity to network with these brilliant people.

Java EE Appreciation Event

On Sunday evening, the excellent networking continued as I met up with the Jython leads: Frank Wierzbicki and Jim Baker, followed by the annual Java EE Appreciation Event at Thirsty Bear.  I was lucky enough to have in-depth conversations with people like Freddy Guime, John Clingan, David Heffelfinger, Sven Reimers, and more.  I also had the privilege of meeting Ed Burns for the first time since joining the JSR 372 expert group.  One of my favorite networking events of JavaOne, by far...thanks Oracle!


Monday, Sept 29

Monday was a full day...starting at 7:30 and going until 10:00 in the evening.  Of course, the day actually started at 8:30 am, but I had to get to Duke's Cafe for my morning coffee fix first!  I started my day off right with a JSR-107 (JCACHE) Tutorial.  This was an excellent 2 hour tutorial that was led by Steve Millidge of C2B2.  He had a few slides, but delved into lots of code examples.  We did not cover a server-side scenario, but instead we focused on a Java SE-based solution with Oracle Coherence.  I got a lot out of the session, and it was jam packed with information for the full two hours.

Next up was a session on Java EE 8, led by Linda DeMichiel, Java EE 8 Specification Lead.  This was an informational session regarding ideas and concepts that are being kicked around (and some already implemented) for Java EE 8.  Nice indeed to learn about the possible future of Java EE by the leaders themselves.

Parc 55 Lounge


My afternoon was full of great sessions (including one of my own). The schedule went like this:

HTTP 2.0 Comes to Java:  What Servlet 4.0 Means To You

Excellent session hosted by Ed Burns and Shing Wai Chan discussing the future with Servlet 4.0.  HTTP 2 will make quite a difference behind the scenes...sounds like these two have a great strategy for moving forward.  If you work with Java EE and you missed this talk, I recommend checking out the slides.

Java EE 7 Recipes (My Talk)

I covered 25 different topics in this talk, spanning across most of the Java EE 7 APIs.  I gave a similar talk for the Chicago Coder Conference a couple of months back, but I changed a few recipes a bit and added a recipe covering JAX-RS AsyncResponse.  I feel that my Java EE 7 Recipes talk was well received, but I tried to pack too much into it.  I ended up stumbling a bit because I was a bit too rushed...I'll have to cut back on the content a bit next time so that I have more time to answer questions.  I was honored to have a full room, along with Reza Rahman (Oracle Java EE Evangelist) in the audience.

Slides:  http://www.slideshare.net/javajuneau/java-ee-7-recipes
Coder Conference Video:  https://www.youtube.com/watch?v=o9gdu1D4Bc0

Java API for JSON Binding

This talk was given by Martin Grebac, and it discussed the upcoming JSON-B API for Java EE.  Well attended, and very informative...looking forward to working with this API!

What's Next for WebSocket API

I was unable to attend the entire WebSocket session, although I did make most of it.  Throughout the session, Pavel Bucek went through the history of the API, usage, and then touched upon a few of the updates that we will see in the next release.

JCP Community Party

No doubt, this was a highlight of the trip for me!  The JCP Community is celebrating 15 years, and the party was great.  Held on the top floor of the Hilton, this party was located in a fantastic setting, and I met up with many brilliant minds there...David Heffelfinger, Freddy Guime, Bob Paulin, Jim Weaver, Geertjan Wielenga...just to name a few.  It was a quick visit, as I had to be off to the GlassFish BOF over at Moscone!

Top of the Hilton at the JCP Community Party


GlassFish BOF

I came in toward the end of this BoF, as I was late arriving from the JCP Party.  Always great to speak with the leaders of GlassFish...including Reza Rahman, John Clingan, David Delebasse, and more.  It was great to learn the needs that others in the industry have with respect to GlassFish.

What's Next for JSF?

Excellent BoF, hosted by Ed Burns and Manfred Riem.  Discussed the future of JSF...focused efforts on tidying up via Oracle, but more of a community-driven effort to add new features.  Kito Mann discussed how he'd like to add JSON Rendering to the spec, and Ian Hlavats presented an excellent talk on adding Twitter bootstrap support and/or RenderKits that target AngularJS directives.

Calling all GlassFish Users and Groups

This was a small-sized BoF, as there were only a handful of attendees since it was so late in the evening.  We were able to engage in conversation with Reza Rahman, Steve Millidge, John Clingan, and others to learn about how we can help GlassFish to move forward.  Most important things we can do are testing bug repairs, clean up the issue tracker, download and test the builds, etc.  Take a look at https://glassfish.java.net/fishcat
to learn more about getting involved.

Tuesday,  Sept 30

Another day full of excellent tutorials, sessions, and BoFs.  I had no scheduled talks on Tuesday, so I was open to take in the conference...and I did just that.  I started the morning with another 2 hour tutorial given by Michael Finocchiaro and Ryan Cuprak on getting applications to mobile using Cordova.  Very detailed, and based around a real life application deployment.

Adopt-a-JSR for Java EE 8

In this talk, Heather Vancura, Reza Rahman, Ed Burns, and Mohamad Taman discussed the different ways in which JUGs could assist if their organization were to join the Adopt-a-JSR program.  This was very beneficial to me personally because I am going to be helping the Chicago Java User Group with their efforts in adopting JSR 366.  Heather provided an excellent overview of the program.  Reza discussed about the focus points for Java EE 8.  Ed spoke to his experience with user groups adopting JSRs that he has led in the past.  Mohamed discussed how he and his organization had successfully rolled out a major enterprise system utilizing Java EE technologies and Java Card.

Stop! or My Duke Will Shoot!

The excellent Dierk Konig presented on OpenDolphin and communications with IoT devices.  During the presentation, he utilized a mobile phone to target and shoot the audience with foam darts.  OpenDolphin is an open source framework for constructing JavaFX applications using an MVC architecture.  In summary: have a look at OpenDolphin...looks great!

** Lunch with Apress:  I was lucky enough to grab lunch at Duke's cafe with my Apress editor, Jonathan Gennick.

** Creating Our Robot Overlords

This one gets two stars, as it was one of my most enjoyed sessions of the conference.  Jim Weaver hosted the IoT and JavaFX experts: Mark Heckler and Sean Phillips, who demonstrated how to program Drone devices with Java.  Mark presented a very amusing and brilliant session with a drone that he ended up programming to fly in several different patterns.  During his presentation, he mentioned that he did not achieve the end result without injury or ruin in his living room.  The drone took flight in front of the audience, all the while presenting data that was displayed in real time via a JavaFX GUI written by Jens Deters.  Sean was in charge of constructing a 3D JavaFX fly pattern simulator, with which he did an outstanding job.  The simulator showed a TIE Fighter flying the same pattern as the drone just flew in front of the crowd.  The entire presentation was impressive!

About to Put Drone Into Flight


Simplifying HTML5/JavaScript Rich Clients with Java EE

In this session, Geertjan Wielenga demonstrated how to easily construct a JSF application from entity classes using NetBeans.  Johannes Wiegend then demonstrated how to do the same with AngularJS.  Informative, and it makes me love JSF, NetBeans, and PrimeFaces even more.  While there is benefit to being diverse with choice in development frameworks, I'll continue to use JSF where possible, and leave AngularJS and other client side frameworks to those that tend to weigh more on the client or require more statelessness than JSF offers.

Model-View-Controller in Java EE 8

I have been curious to see how the new MVC framework for Java EE evolves.  I am happy to know that it is in the good hands of Manfred Riem, Spec lead.  In this BoF, Manfred covered where he believes the JSR will focus, and re-iterated that it is not meant to be a JSF replacement.  It will be good to have a standard in Java EE for this style of web development.  More tools for the job!

Meet the Java EE Specification Leads

I arrived a bit late for this BoF, but it was very important for Java EE.  In this BoF, Linda DeMichiel and Bill Shannon outlined what is in store for Java EE 8, thus far.  All Java EE 8 spec leads were on the panel, and answered various questions regarding their specifications.  I had the honor of speaking with Bill Shannon after the BoF for a few minutes regarding the Adopt-a-JSR program.


Wednesday, Oct 1

I was energized when I woke up on Wednesday because I was really looking forward to my Java EE Recipes for Concurrency talk later that afternoon.  This was the mood of the day, as I only attended a few sessions, but had the opportunity to take in the best of JavaOne...the networking.

PrimeTime JSF with PrimeFaces 5.0

Kito Mann is an excellent speaker.  What's better than to have an excellent speaker talk on an excellent topic.  Hands down (IMO), the best JSF framework available today, PrimeFaces was covered from top to bottom via Kito's presentation.  While I am already very familiar with the framework, I did learn a few new tips from Kito...very insightful.  Also very surprised to receive a tweet from Cagatay Civici (PrimeFaces Lead) during the presentation, requesting a photo.  I have the honor of sitting on the JSF 2.3 Expert Group with both Kito and Cagatay.

Java EE 7 Hands On Lab

David Heffelfinger and Mark Heckler were the presenters for this year's Java EE Hands On Lab, and they did a terrific job.  I had the opportunity to help answer questions for the class, along with Sven Reimers and Bob Larson.  It was great to interact with the students, learning the areas in which they develop and why they are trying to learn Java EE.  For those who began their journey into Java EE with this class, they couldn't have begun a better way.

David Heffelfinger Teaching JSF

Mark Heckler Spreading Knowledge of JavaEE


Debugging and Profiling Robots

Int his session, the great James Gosling presented along with other JavaFX and IoT experts:  Mark Heckler, Jose Pereda, and Jens Deters.  Geertjan Wiengela ran interference during this session that provided some good tips, "lessons learned", and great tooling tips from the IoT masters.  James Gosling told some tales regarding his experiences with the wave gliders.  I was surprised to learn that the biggest issue is fishermen.  Mark Heckler flew the drone and spoke about NetBeans for debugging and profiling.  Jose and Jens demoed their Raspberry Pi tablets and controlled devices over seas in a live session.  All in all....great!

James Gosling's Wave Runner in the Exhibition Hall


Project Avatar:  Server-Side JavaScript on the JVM

John Clingan led this talk, followed by some discussion with the Project Avatar team members.  During this session, Project Avatar 2.0 was announced, which virtually enables Node.js applications to run on the JVM.  They call Avatar "serverside JavaScript for the JVM", and I can see its use-case.  I'll certainly keep an eye on this project, as it seems to have a great team behind it.

Java EE 7 Recipes for Concurrency

I was honored to present on the Concurrency Utilities for Java EE as the last presentation time slot for the day.  The room was jam packed, and it was full of smart individuals who asked great questions.  I was very happy with the way that this session went, and I was happy with the great crowd of attendees.  Thanks, and I hope that it was useful.

Slides: http://www.slideshare.net/javajuneau/java-ee-7-recipes-for-concurrency-javaone-2014

JavaOne Appreciation Event

I had the privilege to attend the JavaOne Appreciation Event with some of the smartest minds in the business.  It was great to get out for the evening and see one of the classics, Aerosmith, and also to engage in some highly technical collaboration.

Oracle Appreciation Event



Thursday, Oct 2

Final day...what a week!  It flew by, and I barely had a moment to sit down and take a breather in Duke's Cafe (although I did catch the NullPointers playing there for about 1/2 hour and they were excellent).

JavaOne Community Keynote

The keynote was great, and I was lucky enough to sit only a few rows back, right in the center.  I was happy that the technical session was presented again, and Mark Reinhold and Brian Goetz did a great job.  Jim Weaver is always a great presenter, as were all of the others on stage.  This is truly a great time to be a Java developer...exciting times in all areas of the platform!

Mark Reinhold
JavaOne Q&A with the Experts


Java EE 8 Community Update and Panel

The panel in this session was comprised of Java application server product leads (David Blevins, John Clingan, Cameron Purdy, Bruno Borges, Kevin Sutter, Mark Little), as well as the expert community voice of Adam Bien.  In this session, the leads gave their thoughts on Java EE 8, and what features or ideas are most important from their perspective.  The community had a voice in that the audience was invited to ask questions and raise comments/discussions on what features the community feels are needed for Java EE 8 compliant containers.

Building Java Applications with JavaFX 8 and Java EE 7

Bruno Borges presented some ideas around different integration points for JavaFX8 applications with the Java EE 7 stack.  He outlined which Java EE 7 APIs are likely useful for use with JavaFX applications, and which would be less useful.  He also touched upon some ideas on how to achieve integration, as well as highlighted some frameworks that are currently in existence to help fill the gaps.

Enterprise Nashorn

This talk was presented by Adam Bien, and he delved into some real-life use-cases for Nashorn within Java Enterprise environments.  It was interesting to hear how his projects have made use of Nashorn and also how easy the integration between Java and JavaScript can be achieved.

Applying Groovy Closures for Fun and Productivity

I closed out the conference by attending this talk, which was presented by the great Venkat Subramaniam.  In this talk, Venkat did an excellent job of showing how useful Groovy closures can be.  He also went into some detail on other useful features, such as currying and memoization, both of which Groovy has to offer.

Summary

JavaOne 2014 was well worth the trip.  Not only was it chocked full of great session content and tutorials, but it also provided a world-class collaboration composed of some of the greatest minds in Java.

Thursday, August 28, 2014

JavaOne 2014 Sessions

I am delighted to be presenting on Java EE topics this year at JavaOne.  In particular, I will be presenting on Concurrency Utilities for Java EE, as well as presenting recipes covering some of the new features in Java EE 7.

I want to thank Geertjan Wielenga, who has asked me to present a lightning talk for NetBeans Day (September 28), where I will be covering some of the great NetBeans support for the PrimeFaces JSF Framework.  Looking forward to it!

Session Details:

Session ID: UGF8906
Session Title: Lightning Talks: Even More Productivity with Free Java Tools
Venue / Room: Moscone South - 200
Date and Time:  9/28/14, 17:30 - 18:15

Session ID: CON2038
Session Title: Java EE 7 Recipes
Venue / Room: Parc 55 - Cyril Magnin I
Date and Time: 9/29/14, 14:30 - 15:30

Session ID: CON2258
Session Title: Java EE 7 Recipes for Concurrency
Venue / Room: Parc 55 - Cyril Magnin I
Date and Time: 10/1/14, 16:30 - 17:30


David Heffelfinger and Mark Heckler will be hosting the Java EE Hands On Lab for JavaOne.  I want to thank them for asking me to be on-hand to help out, as needed.  Looking forward to helping promote Java EE.  The details are as follows:

Session ID:  HOL1827
Session Title:  Java Platform, Enterprise Edition Lab 101:  An Introduction
Venue / Room:  Hilton - Franciscan A/B
Date and Time:  10/1/14, 10:00 - 12:00

Looking forward to seeing everyone at the conference!

Friday, August 22, 2014

Getting Started with PrimeFaces Mobile


Introduction

If you have developed an application that utilizes PrimeFaces, or if you are planning to develop a web application for use on desktop and mobile devices, then consider PrimeFaces Mobile for your mobile implementation. This blog post will cover some basics to help you get started developing a mobile interface for an existing PrimeFaces application. However, the same procedures can be applied to an application that is being written from scratch. This article is a precursor to an article that I am currently writing for OTN, which will cover the PrimeFaces Mobile API in more detail.  That article will be published later this year.

Getting in the Mobile Mindset

One of the most important pieces of a mobile project is getting into the mobile mindset.  While you may have a set of components that you are comfortable using on standard web applications, these components may not provide the best experience when transferred to the smaller screen.  For that reason, you need to think about how your user is going to be interacting with your application on the small screen, and provide them with the most convenient user interface as possible.  Some things to consider are the amount of text that you will want your users to be typing.  If they are on a small device, it may be cumbersome to type lots of text, so we will want to provide them with easy to use components, allowing them to type as little as possible, and even selecting from lists instead.  We also need to consider real estate (no not the housing market).  Adding a menu to the top or bottom of the screen may not be beneficial to the user if they do not have enough screen left to easily navigate an application.

These are just a couple of the issues tat are presented when developing applications for a mobile device.  PrimeFaces Mobile is well suited to assist in these areas since it is built upon one of the leading mobile HTML5 based UI frameworks.  PrimeFaces Mobile consists of many UI components that can enable users to be highly productive on a mobile device.  If you take a look at the PrimeFaces Showcase, you can see many of these mobile components in action.  This enables you to get an idea of how these components look, and how they react for the user.  It is recommended to visit the PrimeFaces mobile showcase on a mobile device such as a smartphone or tablet gain the best understanding of how they'll react.

Creating a Mobile Root

Now that you have a basic understanding of some mobile design concepts, let's take a look at how easy it is to get started creating mobile views using PrimeFaces mobile.  Before PrimeFaces 5, mobile was a separate download that needed to be included in your project.  Now it is easier than ever to get going with PrimeFaces Mobile, as it is packaged as part of PrimeFaces 5.  This makes it easy to build enterprise web applications on PrimeFaces for the standard browser, and then build separate views for use on mobile devices, oftentimes utilizing the same back-end business methods for each.  I recommend creating a view that is dedicated as a starting point or "root" for mobile device users.  I also recommend creating a separate MobileNavigationController class to handle navigation throughout the mobile views, as needed.  We can utilize the mobile root view to set the hook for using the MobileNavigationController vs. the standard web application navigation.

For the purposes of this article, let's simply call our mobile root mobileRoot.xhtml.  In this case, mobleRoot.xhtml may look something like the following:
<html xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
      xmlns="http://www.w3.org/1999/xhtml">


    <f:metadata>
        <f:viewaction action="#{mobileNavigationController.doMobile()}" id="useMobile">
    </f:viewaction>
    </f:metadata>

    <h:head>
        <h:outputscript library="js" name="addtohomescreen.js">
        <h:outputstylesheet library="css" name="addtohomescreen.css">
        <script>
            addToHomescreen();
        </script>
    </h:outputstylesheet></h:outputscript></h:head>
    <h:body>

    </h:body>
</html>

In the view above, a JSF viewAction is used to initiate the MobileNavigationController doMobile() method, which sets the mobile UI into motion.  From this point, the navigation can take the user to the primary movile view of the application, and it can also set any other necessary configurations.  The addtohomescreen.js script (http://cubiq.org/add-to-home-screen) can be also be used to supply a nice button to recommend mobile device users to add the mobile application to their homescreen for a more rich experience.  I will address some additional custom configurations for full screen web applications in a future post or the upcoming OTN article.

Creating a Simple Mobile View

Once we've provided our users with a clear path to access the mobile views, we need to ensure that the PrimeFaces mobile render kit is being used to display the mobile views.  To flag a view for use with PrimeFaces Mobile, supply the "renderKitId" attribute in the <f:view> tag of your view, and apply PRIMEFACES_MOBILE as the value.

<f:view renderKitId="PRIMEFACES_MOBILE">


Another requirement or building a PrimeFaces Mobile view is to add the mobile namespace (xmlns:pm="http://primefaces.org/mobile"), as it will be used for each of the PrimeFaces Mobile specific components.  It is also a good idea to include the JSF passthrough (xmlns:pt="http://xmlns.jcp.org/jsf/passthrough") namespace, as we may wish to make use of some HTML5-specific features.

A mobile page consists of a header, content, and a footer.  Each mobile page is enclosed within the <pm:page> tag.  A mobile view can consist of a single page enclosed in <pm:page>, or multiple pages, each with their own identifiers.  In this example, we will create two views that constitute two mobile pages, the second page is accessed via a link on the first page.  It is possible to utilize Facelets templates to build an entire mobile application solution, but in this example we will create each view separately.  It is also possible to develop using the "single page" application strategy that is currently quite popular...we will cover more on that in the OTN article.

The PrimeFaces Mobile example in this post and also the upcoming OTN article builds upon the Acme Pools example that was used in my "PrimeFaces in the Enterprise" article for OTN (http://www.oracle.com/technetwork/articles/java/java-primefaces-2191907.html).  In the full web version, the root view includes a listing of Acme Pool customers in a table view (Figure 1).  We would like to transform this view (and the others) to work better on a mobile device, and also allow selection of each row, which will take us to more information on the selected customer.

Figure 1:  Standard Acme Pools View

For the purposes of this post, we will work with the initial customer view to convert it into a mobile view.  The view will contain a list of customers, and if you select a particular row in the view, then more information on the selected customer will be displayed.  To display a table using PrimeFaces mobile, you must make use of the DataList component, which provides a convenient "clickable" link or button for each row of data.  The DataList differs from a DataTable in that there are no columns in a DataList, but rather, there is one group of related data for each row of data.  The group of data should be wrapped with a clickable link, which will then provide navigation for the user to the second view displaying more details on the selected item.  The following code is used to develop the mobile UI for the customer data list.

Listing 1:  Mobile View (mobile/index.xhtml)
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:pm="http://primefaces.org/mobile"
      xmlns:pt="http://xmlns.jcp.org/jsf/passthrough">
    <f:view renderKitId="PRIMEFACES_MOBILE">
        <h:head></h:head>
        <h:body>
            <pm:page id="customerListing">
                <pm:header>
                    Acme Pools
                </pm:header>
                <pm:content>
                    <h:form id="indexForm">
                        <p:panel header="Acme Pools Customer Listing">
                            <p:dataList id="datalist"
                                 value="#{customerController.items}"
                                 var="item"    
                                 paginator="true"
                                 pt:data-role="listview" pt:data-filter="true"
                                 rows="10"
                                 rowsPerPageTemplate="10,20,30,40,50"
                                        >
                                
                                <p:commandLink
                                   action="#{customerController.loadCustomer}">
                                  <f:param name="customer" value="#{item.customerId}"/>
                                    <h:panelGroup>

                                    <h:outputText value="#{item.customerId} - #{item.name}"/>

                                    <br/>
                                    <h:outputText value="#{item.email}"/>


                                    </h:panelGroup>
                                </p:commandLink>
                            </p:dataList>
                        </p:panel>
                    </h:form>
                </pm:content>
                <pm:footer>
                    Author: Josh Juneau
                </pm:footer>
            </pm:page>
 
        </h:body>
    </f:view>
</html>

As you can see, we flag the view for PrimeFaces Mobile use via the specification in the <f:view> tag.  We then create a <pm:page>, and inside of the page we have sections for <pm:header>, <pm:content>, and <pm:footer>.  The main content consists of a PrimeFaces mobile DataList that displays customer data, and the data is wrapped in a p:commandLink component.  When the link is clicked, the #{customerController.loadCustomer} method is invoked, passing the ID of the selected customer.  Note that the DataList component uses passthrough attributes to specify the data-role and data-filter HTML5 attributes.  These are used to provide the user with a more rich experience.  The filter makes it easy for the user to begin typing a value into a filter textbox, and have the list shortened to contain only the records that contain the typed text.  The resulting view looks like Figure 2.
Figure 2:  Mobile View

The code in Listing 2 contains the implementation for loadCustomer().  The customer ID is passed to the find() method of the EJB, which then returns the selected customer data.

Listing 2:  CustomerController loadCustomer()


    public String loadCustomer() {

        Map requestMap = FacesContext.getCurrentInstance().

                getExternalContext().getRequestParameterMap();

        String customer = (String) requestMap.get("customer");

        selected = ejbFacade.find(Integer.valueOf(customer));

        return "customerInfo";


    }

When a customer is selected in the DataList, the loadCustomer() method is invoked, and it results in the navigation to our second mobile view, customerInfo.xhtml (Figure 3).  The second mobile view basically displays customer details, and provides a link to go back to the DataList of customers.  The code for customerInfo looks like that in Listing 3.

Listing 3:  customerInfo.xhtml View


<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:pm="http://primefaces.org/mobile">
    <f:view renderKitId="PRIMEFACES_MOBILE">
        <h:head></h:head>
        <h:body>
           
            <pm:page id="customerInfo">
                <pm:header>
                    Acme Pools
                </pm:header>
                <pm:content>
                    <h:form>
                        <p:panel header="Acme Pools Customer Information">
                           
                            #{customerController.selected.name}
                            <br/>
                            #{customerController.selected.addressline1}
                            <br/>
                            #{customerController.selected.addressline2}
                            <br/>
                            #{customerController.selected.phone}
                            
                        </p:panel>
                    <p:commandLink action="index?transition=slide" value="Go Back"/>
                    </h:form>
                </pm:content>
                <pm:footer>
                    Author: Josh Juneau
                </pm:footer>
            </pm:page>
        </h:body>
    </f:view>
</html>


As you can see, the customerInfo view contains the same structure as the original mobile view.  There are no special mobile components added, but as you can see from Figure 3, the standard PrimeFaces panel is styled to display nicely on the mobile device.
Figure 3:  Mobile View Selection
Conclusion

That wraps it up for this brief look into using PrimeFaces mobile.  As you can see, it is easy to develop a mobile interface for your applications.  The PrimeFaces mobile suite also includes custom frameworks for navigation, events, and more, making it easy to provide a nice mobile experience.  For instance, the events framework includes some swipe events, as well as taphold.  It is even possible to hook into the JQuery Mobile framework to provide even more mobile events to your application.  

The PrimeFaces mobile navigation framework consists of transitions, which ultimately provide your application with a smoother feel.  For instance, one can provide a transition of "slide" to a button navigation, which will result in a UI view that slides into focus when the button is clicked.  All of this can be tested using the PrimeFaces Showcase.

For more information on these and other important features of PrimeFaces mobile, please watch for my upcoming OTN article.

Resources


JQuery Mobile:  http://jquerymobile.com/

Saturday, August 02, 2014

Chicago Coder Conference Trip Report

The Chicago Coder Conference was held on Friday, August 5th.  The conference venue was a sleek downtown facility on Wacker Drive.  There were breakfast bagels and great coffee to start the day, along with some good networking opportunity.  The keynote began at 8:30 am, where JUG member Scott Kramer spoke about the events of the day, and introduced the keynote speakers.  The keynote included two speakers, each of which were executives from Chicago based companies.  The cars.com executive got into some technical detail covering Hadoop, and how it works, which was quite interesting.

The sessions I attended were led by excellent speakers.  Oracle’s own John Clingan spoke to Java EE 7 and Java EE 8 in his first session.  His talk detailed how Java EE has evolved over the years, and he discussed some of the ideas for the future of Java EE.  Those ideas encompassed a JSON-B API, incremental enhancements to many of the other APIs, continued focus on HTML5, more focus on the cloud, and some key enhancements to Java EE security.  Some of the security concepts looked quite interesting, as it may be possible in the future to utilize annotation based security, rather than configuration.

Next, I attended a session by Davinder Kohli entitled “Unclouding the Cloud”.  In this session, we learned the inner workings of several private and public cloud infrastructures.  He and his colleague then gave a demo of OpenStack, which was interesting, as we learned how easy it was to start and deploy new WordPress sites.

The lunch was great…good food and more great networking.  I then gave a talk on Java EE 7 entitled “Java EE 7 Recipes”.  The talk was well received, and I had quite a few people come and ask questions after the session.  I learned that many people are still not very familiar with the new Java EE, but they remember how difficult J2EE was in the past.  I will be giving a similar presentation at JavaOne...what would you like for me to cover??

The next session was an excellent presentation by Simon Maple entitled “Guide to JVM Languages”.  In this session, he demoed Java 8 lambdas, functional interfaces, and default methods in a live-coding demonstration.  He then covered how to use some similar features in Groovy, Scala, Kotlin, Ceylon, and Xtend.  This session was great, as Simon is an excellent speaker who involved the audience throughout the session.  We were able to compare each of the different languages, and learn a bit about each one.  The overall concept was that the JVM has many great languages…we should try to learn a few of them.

The last session I attended was presented by John Clingan, and it was covering Project Avatar.  Avatar.js is meant to be a node.js solution for the JVM.  In fact, most node.js applications can now be run on the JVM using Avatar.js.  John talked to the reasons why Oracle wanted to develop this solution, and why it was important for the community.  Node.js users could port their applications, and make use of all Java libraries since they are on the JVM with Avatar.js.  Many of the Java EE APIs are being wrapped in JavaScript so that they are accessible to clients using 100% JavaScript.  Oracle knows that Knockout JS and Angular JS are leading the way in single page application frameworks…and they want to enable easy development against Java EE and other JVM technologies for these front end technologies.

Overall, this was an excellent conference.  Kudos go out to the Chicago Java Users Group, and the Illinois Java Users Group for doing such a great job.  Big thanks to Scott Kramer for nudging me to submit a presentation for this conference…it was a great time.

Tuesday, July 22, 2014

JSF 2.3 on the Horizon

Work on the JavaServer Faces 2.3 Specification has begun.  According to the specification summary:

This JSR aims to improve the clarity of the existing JavaServer Faces
(JSF) specification and introduce a small, targeted set of new features
as directed by community contribution.

To summarize, JSF 2.3 will target small scale new features, community driven improvements, and platform integration.

Summary of features from the JSR text:

- Ajax method invocation:  Ability to make direct CDI method invocations from Ajax
- Multi-field validation
- Ability to @Inject FacesContext
- EL Performance Optimizations
- Cross-form Ajax Clarifications
- Platform Integration:  Ability to leverage platform features from Java EE 8 and Java SE 8

Proposed Timeline

Q3 2014  Expert Group formed
Q1 2015  Early Draft
Q3 2015  Public Review
Q4 2015  Proposed Final Draft
Q3 2016  Final Release

Specification leads:  Edward Burns and Manfred Riem

JSR Text:  https://java.net/downloads/javaserverfaces-spec-public/JSF_2_3/PreJsrFiling/20140706-jsf23-jsr.txt

Follow @jsf_spec on Twitter for JSF 2.3 updates.

Wednesday, June 11, 2014

JavaOne 2014 On the Horizon

This year, I submitted three proposals for the JavaOne conference, which takes place September 28 - October 2nd in San Francisco.  I am thrilled that two of them were accepted, and I am looking forward to presenting.  Here are a few details on the selected submissions:

Session ID: CON2038
Session Title: Java EE 7 Recipes
Abstract:
Learn important features of Java EE 7 through a number of examples, using a hands on approach, including working code demonstrations.  The examples are presented in a Problem, Solution, and How it Works recipe-style format, correlating usage of the APIs to real-life scenarios.  The presentation introduces topics using an easy-to-understand approach, and the examples showcase new features of Java EE 7, as well as mature Java EE features.  Recipes cover a variety of APIs from JSF to JPA to WebSockets, providing an overview of Java EE 7, along with examples using APIs together.  The talk explains server-side resources using GlassFish 4.
Attendees will walk away with a solid understanding of some of the most important features of Java EE 7.


Session ID: CON2258
Session Title: Java EE 7 Recipes for Concurrency
Abstract:
This session will demonstrate how to make use of the Concurrency Utilities for Java EE using a hands on approach, including working code demonstrations.  The examples will be presented in a Problem, Solution, and How it Works recipe-style format, which will correlate usage of the API to real-life scenarios.  Attendees will learn how to make use of ManagedExecutorService, ManagedScheduledExecutorService, ContextService, and ManagedThreadFactory resources via practical examples.  The talk will explain server-side resources and configuration via GlassFish, submitting tasks for asynchronous processing, and handling results.  In the end, attendees will be able to go back to the office and start making use of the Concurrency Utilities.

I want to thank all of the JavaOne content reviewers for their hard work, and I appreciate the opportunity to present!  I've seen lots of Twitter posts mentioning excellent sessions that have been selected from very prominent speakers.  I am grateful to be included as a presenter at one of the best Java conferences in the world, and I am looking forward to seeing all of the great presentations from others.  

See you in San Francisco this September!