Author: Rafael Benevides
Level: Beginner
Technologies: CDI, WebSocket, JSON-P
Summary: Shows how to use WebSockets with JSON to broadcast information to all open WebSocket sessions in WildFly.
Target Product: WildFly
Source: https://github.com/wildfly/quickstart/
The websocket-endpoint
quickstart demonstrates how to use Java API for WebSockets to create server endpoints in WildFly Application Server.
The BidWebSocketEndpoint
provides the WebSocket endpoint that receives Message
instances from clients/browsers and replies with the current Bidding
instance. The conversion from JSON content to the specific instances are made by MessageDecoder
and BiddingEncode
classes.
Every update made on the Bidding
are immediately propagated to all opened WebSocket sessions without any browser submission or AJAX polling mechanism.
The application this project produces is designed to be run on WildFly Application Server 11 or later.
All you need to build this project is Java 8.0 (Java SDK 1.8) or later and Maven 3.3.1 or later. See Configure Maven for WildFly 11 to make sure you are configured correctly for testing the quickstarts.
In the following instructions, replace WILDFLY_HOME
with the actual path to your WildFly installation. The installation path is described in detail here: Use of WILDFLY_HOME and JBOSS_HOME Variables.
For Linux: WILDFLY_HOME/bin/standalone.sh
For Windows: WILDFLY_HOME\bin\standalone.bat
mvn clean package wildfly:deploy
target/websocket-endpoint.war
to the running instance of the server.Access the running application in a browser at the following URL: http://localhost:8080/websocket-endpoint/
You are presented with a simple form that shows a bidding with the status NOT_STARTED
.
Click on Do a bid!
button. That will start the bidding and trigger the 1 minute countdown timer. You can also notice that every Bid will be listed under the List of bids
section.
You should open the application URL in other browsers or tabs. You will notice that every change on the bidding is automatically update in all opened browser or tabs. The item will be SOLD once that it reaches the Buy now price
. At the countdown timeout, the bidding will be EXPIRED. You can click on Buy it now
button to immediately buy the item.
You can restart the bidding if you click on Reset bidding
button.
mvn wildfly:undeploy
You can also start the server and deploy the quickstarts or run the Arquillian tests from Eclipse using JBoss tools. For general information about how to import a quickstart, add a WildFly server, and build and deploy a quickstart, see Use JBoss Developer Studio or Eclipse to Run the Quickstarts.
If you want to debug the source code of any library in the project, run the following command to pull the source into your local repository. The IDE should then detect it.
mvn dependency:sources