Click here to close now.

Welcome!

AJAX & REA Authors: Elizabeth White, XebiaLabs Blog, Cloud Best Practices Network, Liz McMillan, Lori MacVittie

Related Topics: Web 2.0, AJAX & REA

Web 2.0: Blog Feed Post

Three Steps to Build a Killer WebSocket App with JavaFX

The app I wanted to build consumes the same data source as the lightning fast Kaazing portfolio demo


Here’s the source for my Sample.fxml file:

 

<?xml version="1.0" encoding="UTF-8"?>

<?import fxmltableview.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.collections.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.control.cell.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.text.*?>
<?import javafxapplication4.*?>

<AnchorPane id="AnchorPane" prefHeight="443.999755859375" prefWidth="656.9998779296875" xmlns:fx="http://javafx.com/fxml" fx:controller="javafxapplication4.SampleController">
  <children>
    <BorderPane prefHeight="706.0" prefWidth="717.0" snapToPixel="false" AnchorPane.bottomAnchor="14.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="14.0" AnchorPane.topAnchor="0.0">
      <right>
        <TableView fx:id="tableView" editable="true" prefHeight="393.999755859375" prefWidth="555.9998779296875">
          <columns>
            <TableColumn prefWidth="240.0" text="Company" fx:id="company">
              <cellValueFactory>
                <PropertyValueFactory property="company" />
              </cellValueFactory>
            </TableColumn>
            <TableColumn prefWidth="100.0" text="Ticker" fx:id="ticker">
              <cellValueFactory>
                <PropertyValueFactory property="ticker" />
              </cellValueFactory>
            </TableColumn>
            <TableColumn prefWidth="100.0" text="Price" fx:id="price">
              <cellValueFactory>
                <PropertyValueFactory property="price" />
              </cellValueFactory>
            </TableColumn>
            <TableColumn prefWidth="100.0" text="Change" fx:id="change">
              <cellValueFactory>
                <PropertyValueFactory property="change" />
              </cellValueFactory>
            </TableColumn>
          </columns>
          <BorderPane.margin>
            <Insets bottom="50.0" left="50.0" right="50.0" top="50.0" />
          </BorderPane.margin>
        </TableView>
      </right>
      <top>
        <Pane prefHeight="32.0" prefWidth="745.0">
          <children>
            <Label alignment="CENTER" contentDisplay="CENTER" layoutX="14.0" layoutY="5.0" prefWidth="614.9998779296875" text="WebSocket Portfolio Demo" textAlignment="CENTER" textFill="#cc6200">
              <font>
                <Font name="System Bold" size="24.0" />
              </font>
            </Label>
          </children>
        </Pane>
      </top>
    </BorderPane>
  </children>
</AnchorPane>

 

Then, I defined the data model driving my TableView. I created a JavaBean, called Stock, with four private variables. The first three: company, ticker, and price, represent the first three columns of my TableView. The fourth one is a computed value, displaying the change of the price of a stock.

 

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package javafxapplication4;

import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;

/**
 *
 * @author pmoskovi
 */
public class Stock {

    private SimpleStringProperty company;
    private SimpleStringProperty ticker;
    private SimpleStringProperty price;
    private SimpleStringProperty change;

    public Stock () {
        setCompany("");
        setTicker("");
        setPrice("");
    }

    public Stock(String company, String ticker, String price, String shares, String value) {
        setCompany(company);
        setTicker (ticker);
        setPrice (price);
    }

    public String getCompany() {
        return companyProperty().get();
    }

    public void setCompany(String company) {
        companyProperty().set(company);
    }

    public StringProperty companyProperty() {
        if (company == null) {
            company = new SimpleStringProperty(this, "company");
        }
         return company;
    }

    public String getTicker() {
        return tickerProperty().get();
    }

    public void setTicker(String ticker) {
        tickerProperty().set(ticker);
    }

    public StringProperty tickerProperty() {
        if (ticker == null) {
            ticker = new SimpleStringProperty(this, "ticker");
        }
         return ticker;
    }

    public String getPrice() {
        return priceProperty().get();
    }

    public void setPrice(String price) {
        priceProperty().set(price);
    }

    public StringProperty priceProperty() {
        if (price == null) {
            price = new SimpleStringProperty(this, "price");
        }
         return price;
    }

    public String getChange() {
        return changeProperty().get();
    }

    public void setChange(String change) {
        changeProperty().set(change);
    }

    public StringProperty changeProperty() {
        if (change == null) {
            change = new SimpleStringProperty(this, "change");
        }
         return change;
    }
}

 

Step 3 – Feeding the application with data through WebSockets

Lastly, by simply following the How to Build Java Client Using Kaazing WebSocket Gateway I created the WebSocket connection, subscribed to the stock data feed, and updated my model which in turn refreshed the TableView in the screen.

The app uses the JMS Edition of Kaazing WebSocket Gateway, allowing you to invoke JMS APIs directly in the JavaFX application code.

 

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package javafxapplication4;

import java.net.URL;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;
import java.util.Properties;
import java.util.ResourceBundle;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Label;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.jms.Topic;
import javax.naming.Context;
import javax.naming.InitialContext;

/**
 *
 * @author pmoskovi
 */
public class SampleController implements Initializable {

    private ObservableList data;
    @FXML
    private Label label;
    @FXML
    private TableView tableView;
    @FXML
    private TableColumn<Stock, String> change;
    ListIterator it;

    public void startRendering() {

        addStock("3mCo", "MMM", "", "", "");
        addStock("AT&T Inc", "T", "", "", "");
        addStock("Boeing Co", "BA", "", "", "");
        addStock("Citigroup", "C", "", "", "");
        addStock("Hewlett-Packard Co", "HPQ", "", "", "");
        addStock("Intel Corporation", "INTC", "", "", "");
        addStock("International Business Machines", "IBM", "", "", "");
        addStock("McDonald's Cororation", "MCD", "", "", "");
        addStock("Microsoft Corporation", "MSFT", "", "", "");
        addStock("Verizon Communications", "VZ", "", "", "");
        addStock("Wal-Mart Stores Inc", "WMT", "", "", "");

        doConnect();
    }

    protected void addStock(String company, String ticker, String price, String shares, String value) {
        ObservableList data = tableView.getItems();
        data.add(new Stock(company, ticker, price, shares, value));
    }

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        startRendering();
    }

    protected void doConnect() {
        Properties props = new Properties();
        props.put(InitialContext.INITIAL_CONTEXT_FACTORY,
                "com.kaazing.gateway.jms.client.stomp.StompInitialContextFactory");

        //WebSocket end-point
        props.put(Context.PROVIDER_URL, "ws://demo.kaazing.com/jms");
        InitialContext ctx;
        final ObservableList data = tableView.getItems();

        try {
            ctx = new InitialContext(props);
            ConnectionFactory connectionFactory;
            connectionFactory = (ConnectionFactory) ctx.lookup("ConnectionFactory");

            //Creating WebSocket connection
            Connection connection = connectionFactory.createConnection(null, null);
            connection.setExceptionListener(new ExceptionListener() {
                @Override
                public void onException(JMSException jmse) {
                    jmse.printStackTrace();
                }
            });

            //Creating JMS session
            Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);

            //Creating JMS topic
            Topic topic = (Topic) ctx.lookup("/topic/portfolioStock");

            //Creating JMS consumer
            MessageConsumer consumer = session.createConsumer(topic);
            consumer.setMessageListener(new MessageListener() {
                @Override
                public void onMessage(Message msg) {
                    it = data.listIterator();

                    try {
                        // Creating a String array out of the incoming message: ticker, company, price
                        String[] stockMsgArr = parseList(((TextMessage) msg).getText(), ":");

//                        System.out.println(stockMsgArr[0] + ":" + stockMsgArr[1] + ":" + stockMsgArr[2]);
                        // Loop through all the elements of the viewTable model
                        while (it.hasNext()) {
                            // st holds the current row of tableView
                            Stock st = (Stock)it.next();
//                            System.out.println("st.getTicker() " + st.getTicker() + " | " + "stockMsgArr[1] " + stockMsgArr[1]);

                            if (st.getTicker().equals(stockMsgArr[1])) {
                                Float oldValue, newValue;
                                newValue = Float.parseFloat(stockMsgArr[2]);
                                oldValue = Float.parseFloat((st.getPrice().equals("")) ? "0" : st.getPrice());
//                                System.out.println ("oldValue: " + oldValue + " | newValue: " + newValue);
                                ((Stock)(it.previous())).setChange(new DecimalFormat("#.##").format((newValue-oldValue)));
                                st.setPrice (newValue.toString());
                                break;
                            }
                        }
                    } catch (JMSException e) {
                        e.printStackTrace();
                    }
                }
            });
            connection.start();
        } catch (Exception ex) {
            Logger.getLogger(SampleController.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static String[] parseList(String list, String delim) {
        List result = new ArrayList();
        StringTokenizer tokenizer = new StringTokenizer(list, delim);
        while (tokenizer.hasMoreTokens()) {
            result.add(tokenizer.nextToken());
        }
        return (String[]) result.toArray(new String[0]);
    }

}

 

If you’re attending JavaOne this year, come to our session for goodies and cool demos on WebSockets.

To learn more about the JMS APIs exposed to Web clients, or if you want to see step-by-step instructions on building a true HTML5 WebSocket app using the JavaScript API, check out these Kaazing tutorials.


Read the original blog entry...

More Stories By Jonas Jacobi

Jonas has 21 years of experience leading the development of innovative technology products and services. Together with Kaazing’s Co-Founder & CTO John Fallows, he pioneered and championed the groundbreaking HTML5 WebSocket standard. Prior to co-founding Kaazing he served as VP of Product Management for Brane Corporation, a Silicon Valley startup dedicated to developing a market-leading enterprise platform for building model-driven apps. Before Brane, he spent 8+ years at Oracle where he served as a Java EE and open source Evangelist, and was Product Manager in the Oracle Application Server division for JavaServer Faces, Oracle ADF Faces, and Oracle ADF Faces Rich Client. He is a frequent speaker at international conferences on accelerating and scaling secure enterprise-grade WebComms (Web Communications).

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@CloudExpo Stories
Business as usual for IT is evolving into a “Make or Buy” decision on a service-by-service conversation with input from the LOBs. How does your organization move forward with cloud? In his general session at 16th Cloud Expo, Paul Maravei, Regional Sales Manager, Hybrid Cloud and Managed Services at Cisco, discusses how Cisco and its partners offer a market-leading portfolio and ecosystem of cloud infrastructure and application services that allow you to uniquely and securely combine cloud busi...
Docker is an excellent platform for organizations interested in running microservices. It offers portability and consistency between development and production environments, quick provisioning times, and a simple way to isolate services. In his session at DevOps Summit at 16th Cloud Expo, Shannon Williams, co-founder of Rancher Labs, will walk through these and other benefits of using Docker to run microservices, and provide an overview of RancherOS, a minimalist distribution of Linux designed...
Businesses are looking to empower employees and departments to do more, go faster, and streamline their processes. For all workers – but mobile workers especially – utilizing the cloud to reconnect documents and improve processes without destructing existing workflows can have a dramatic impact on productivity. In his session at 16th Cloud Expo, Mark Grilli, vice president of Acrobat Solutions marketing at Adobe Systems Incorporated, will outline new ways that the cloud is changing the way peo...
SYS-CON Events announced today that Vitria Technology, Inc. will exhibit at SYS-CON’s @ThingsExpo, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. Vitria will showcase the company’s new IoT Analytics Platform through live demonstrations at booth #330. Vitria’s IoT Analytics Platform, fully integrated and powered by an operational intelligence engine, enables customers to rapidly build and operationalize advanced analytics to deliver timely business outcomes ...
Are your applications getting in the way of your business strategy? It’s time to rethink your IT approach. In his session at 16th Cloud Expo, Madhukar Kumar, Vice President, Product Management at Liaison Technologies, will discuss a new data-centric approach to IT that allows your data, not applications, to inform business strategy. By moving away from an application-centric IT model where data integration and analysis are subservient to the constraints of applications, your organization will b...
SYS-CON Events announced today that Solgenia will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY, and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Solgenia is the global market leader in Cloud Collaboration and Cloud Infrastructure software solutions. Designed to “Bridge the Gap” between Personal and Professional S...
SYS-CON Events announced today that QTS Realty Trust, one of the nation’s largest and fastest-growing providers of data center facilities and cloud services and a leader in security and compliance, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. QTS Realty Trust, Inc. (NYSE: QTS) is a leading national provider of data center solutions and fully managed services, and a leader in security and compliance...
SYS-CON Events announced today that WSM International (WSM), the world’s leading cloud and server migration services provider, will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY. WSM is a solutions integrator with a core focus on cloud and server migration, transformation and DevOps services.
SYS-CON Events announced today that Liaison Technologies, a leading provider of data management and integration cloud services and solutions, has been named "Silver Sponsor" of SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York, NY. Liaison Technologies is a recognized market leader in providing cloud-enabled data integration and data management solutions to break down complex information barriers, enabling enterprises to make sm...
SYS-CON Events announced today that MangoApps will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY., and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. MangoApps provides private all-in-one social intranets allowing workers to securely collaborate from anywhere in the world and from any device. Social, mobile, and eas...
WSM International has launched a DevOps services division that offers assessment, consulting and implementation to large enterprises and organizations with complex infrastructures. The concept of DevOps is to blend information technology (IT) software development with operations to optimize the computing infrastructure according to the specific needs of the organization. According to a recent press release from Gartner, "By 2016, DevOps will evolve from a niche strategy employed by large cloud ...
Sematext is a globally distributed organization that builds innovative Cloud and On Premises solutions for performance monitoring, alerting and anomaly detection (SPM), log management and analytics (Logsene), and search analytics (SSA). We also provide Search and Big Data consulting services and offer 24/7 production support for Solr and Elasticsearch.
The WebRTC Summit 2014 New York, to be held June 9-11, 2015, at the Javits Center in New York, NY, announces that its Call for Papers is open. Topics include all aspects of improving IT delivery by eliminating waste through automated business models leveraging cloud technologies. WebRTC Summit is co-located with 16th International Cloud Expo, @ThingsExpo, Big Data Expo, and DevOps Summit.
The speed of software changes in growing and large scale rapid-paced DevOps environments presents a challenge for continuous testing. Many organizations struggle to get this right. Practices that work for small scale continuous testing may not be sufficient as the requirements grow. In his session at DevOps Summit, Marc Hornbeek, Sr. Solutions Architect of DevOps continuous test solutions at Spirent Communications, will explain the best practices of continuous testing at high scale, which is r...
@ThingsExpo has been named the Top 5 Most Influential M2M Brand by Onalytica in the ‘Machine to Machine: Top 100 Influencers and Brands.' Onalytica analyzed the online debate on M2M by looking at over 85,000 tweets to provide the most influential individuals and brands that drive the discussion. According to Onalytica the "analysis showed a very engaged community with a lot of interactive tweets. The M2M discussion seems to be more fragmented and driven by some of the major brands present in the...
Countless business models have spawned from the IaaS industry. Resell Web hosting, blogs, public cloud, and on and on. With the overwhelming amount of tools available to us, it's sometimes easy to overlook that many of them are just new skins of resources we've had for a long time. In his General Session at 16th Cloud Expo, Phil Jackson, Lead Developer Advocate at SoftLayer, will break down what we've got to work with and discuss the benefits and pitfalls to discover how we can best use them t...
SYS-CON Events announced today Arista Networks will exhibit at SYS-CON's DevOps Summit 2015 New York, which will take place June 9-11, 2015, at the Javits Center in New York City, NY. Arista Networks was founded to deliver software-driven cloud networking solutions for large data center and computing environments. Arista’s award-winning 10/40/100GbE switches redefine scalability, robustness, and price-performance, with over 3,000 customers and more than three million cloud networking ports depl...
Hosted PaaS providers have given independent developers and startups huge advantages in efficiency and reduced time-to-market over their more process-bound counterparts in enterprises. Software frameworks are now available that allow enterprise IT departments to provide these same advantages for developers in their own organization. In his workshop session at DevOps Summit, Troy Topnik, ActiveState’s Technical Product Manager, will show how on-prem or cloud-hosted Private PaaS can enable organ...
The world's leading Cloud event, Cloud Expo has launched Microservices Journal on the SYS-CON.com portal, featuring over 19,000 original articles, news stories, features, and blog entries. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. Microservices Journal offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. Follow new article posts on T...
Plutora provides enterprise release management and test environment SaaS solutions to clients in North America, Europe and Asia Pacific. Leading companies across a variety of industries, including financial services, telecommunications, retail, pharmaceutical and media, rely on Plutora's SaaS solutions to orchestrate releases and environments faster and with integrity. Products include Plutora Release Manager, Plutora Test Environment Manager and Plutora Deployment Manager.