How to build an app in the Play Framework
Using the Play Framework is a reliable and effective method for creating web apps in Java or Scala. Play Framework offers developers a successful and pleasurable development experience with its reactive and lightweight architecture.
You can use Play's extensive feature set, which includes integrated support for RESTful APIs, real-time updates, asynchronous programming, and a strong community of plugins and modules. Create scalable, responsive, and extremely fast apps with the Play Framework, whether starting a new project or updating an existing one.
Building an application in Play
To build a Play Framework application using Java 11, you can follow these steps.
Install Java 11
sudo apt updatesudo apt install openjdk-11-jdk
Verify Java installation
java --version
The output should indicate that Java 11 is installed.
Download and install scala build tool (sbt)
curl -L -o sbt.deb https://repo.scala-sbt.org/scalasbt/debian/sbt-1.5.5.debsudo dpkg -i sbt.debsudo apt updatesudo apt install sbt
Verify sbt installation
sbt --version
The output should indicate the sbt version that is installed.
Create a new Play Framework application
sbt new playframework/play-java-seed.g8 --name=my-play-app
You can replace my-play-app with the desired name for your Play application.
Change into the project directory
cd my-play-app
Run the Play application
sbt run
This command will start the Play development server, and you should see an output indicating that the application is running.
Congratulations! You have successfully created and run a Play Framework application using Java 11. You can access the application in your web browser at http://localhost:9000.
Running the application on custom port number
If you don't want the output displayed on this port number, you can run the application at your desired port number by making the following changes.
To specify a custom port for your Play application, follow these steps:
Open the
application.conffile located in theconfdirectory.Add or modify the
play.http.portproperty in the file to specify the desired port number. For example:
play.http.port = 9300
The application is configured to run on port 9300 in the above code. You can replace it with your preferred port number.
Save the
application.conffile.Run the Play application with the modified port configuration.
Now your Play application will be running on the specified port (e.g., http://localhost:9300). You can access it in your web browser using the custom port number you configured.
You can do this by defining it in your run command
sbt 'run -Dhttp.port=9300'
Play application
This runs the application on http://localhost:9300 and displays a "Welcome to Play!" prompt on the server.
Please add your host link to the application.conf file in the list
play.filters.hosts.allowed = ["localhost", "ed-5934822110003200.educative.run"]
As shown here
package controllers;
import play.mvc.*;
/**
* This controller contains an action to handle HTTP requests
* to the application's home page.
*/
public class HomeController extends Controller {
/**
* An action that renders an HTML page with a welcome message.
* The configuration in the <code>routes</code> file means that
* this method will be called when the application receives a
* <code>GET</code> request with a path of <code>/</code>.
*/
public Result index() {
return ok(views.html.index.render());
}
}
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