In Tomcat, we have to move the war file to the CATALINA_BASE/webapps directory. The sample TomCat application we will be using for this exercise is included in a git repository so that you can run through this tutorial easily. Apache Tomcat software powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations. The Tomcat server is the most widely used open source implementation of the Java Servlet, JavaServer Pages, Java Expression Language, and Java WebSocket technologies. In this post, we are going to step through a basic tutorial on getting a web application running on Tomcat Docker Container. As we explained in the previous post, Docker containers wrap up software and its dependencies into a standardized unit for software development that includes everything it needs to run: code, runtime, system tools, and libraries. This post was originally written for TechTownTraining blog.ĭocker is a platform for developers and sysadmins to develop, deploy, and run applications with containers. In addition, in our HelloResource.java file, our Path is set to /hello-world.Deploying Your First Web App to Tomcat on Docker SoftwareYogaĭeploying Your First Web App to Tomcat on Docker If we go back to our application code, we can find the ApplicationPath in our HelloApplication.java - which is /api. In the next step, we will figure out how to reach our application’s endpoint that displays the Hello World message. (because it's a simple service with some REST APIs). For example, we don't currently have an index.jsp file. We get this 404 page because Tomcat is running and listening for requests, but our application has no view to display. In the Run window ⌘4 (macOS), Alt+4 (Windows/Linux), you can check the logs to ensure that your Tomcat server is being deployed, however, IntelliJ IDEA automatically opens a browser when the URL of the application's root context - You should receive a 404 error: We can run our application with ⌃⇧R (macOS) / Ctrl+Shift+F10 (Windows/Linux) and this starts our Tomcat server. You can open the Services window with ⌘8 (macOS) / Alt+8 (Windows/Linux) to see the Tomcat server we just configured along with our web application. IntelliJ IDEA will now create our simple web application which will output “Hello, World!” when it receives a GET request. The Eclipse Jersey Server and Weld SE have been preselected for us because we selected REST service as the template in the previous step. Click Next to go to the next step in the tutorial and select Jakarta EE 9 from the Version drop-down.This is the name of your project by default. You can change this if required or leave it as the default com.example. This will also populate the Tomcat base directory. For the Tomcat Home, browse to the directory where you have Tomcat installed. We want to create a RESTful web application so leave the REST service template selected. Select this checkbox if you want to use Git to version control the files in this project. The name of your project, such as HelloWebApp. Select Java Enterprise on the left-hand menu and enter the following details: If you have an existing project open, click File > New.From the Welcome Screen select New Project.We're going to create a small web application that runs on Tomcat to demonstrate the integration in IntelliJ IDEA Ultimate:
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