Landmark Technology — Maven Web Application (DevOps Class 42)

A Java web application built with Maven for DevOps Class 42 by Landmark Technology. Runs on port 8081 and serves a styled web page.

Project Overview

This application starts an embedded HTTP server on port 8081 and serves a web page about Landmark Technology's DevOps Class 42. Built with Java 17 and Apache Maven.

Project Structure

├── pom.xml                                  # Maven build configuration
├── README.md                                # This file
└── src/
    ├── main/java/com/example/
    │   └── Main.java                        # Web server entry point
    └── test/java/com/example/
        └── MainTest.java                    # Unit tests (JUnit 5)

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Prerequisites

On Amazon Linux (EC2):

sudo yum update -y
sudo yum install java-17-amazon-corretto-devel -y
sudo yum install maven -y

Verify installations:

java -version
mvn -version

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Build the Project

git clone https://github.com/LandmakTechnology/landmark_javaapp.git
cd landmark_javaapp
mvn clean package

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Run the Application

java -jar target/simple-java-app-1.0-SNAPSHOT.jar

Expected terminal output:

Hello from Landmark Technology!
Server started on port 8081
Access the application at http://localhost:8081

Then open your browser and go to:

http://localhost:8081

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Run the Tests

mvn test

Expected output:

[INFO] Tests run: 8, Failures: 0, Errors: 0, Skipped: 0
[INFO] BUILD SUCCESS

Test Cases

Test	Description
testGreetingMessage	Verifies the greeting returns the exact expected string
testGreetingIsNotNull	Ensures the greeting is never null
testGreetingIsNotEmpty	Ensures the greeting is not an empty string
testGreetingContainsLandmark	Verifies the greeting mentions "Landmark"
testFormattedTimeContainsPrefix	Checks output starts with "Current Time: "
testFormattedTimeContainsDate	Verifies the date appears in the output
testFormattedTimeExactMatch	Validates exact output for a known date/time
testHtmlPageContainsDevOpsClass42	Verifies the HTML page includes "DevOps Class 42"

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Deploy on an EC2 Instance

Step 1 — SSH into your EC2 instance:

ssh -i <your-key.pem> ec2-user@<your-ec2-public-ip>

Step 2 — Install Java and Maven:

sudo yum update -y
sudo yum install java-17-amazon-corretto-devel -y
sudo yum install maven -y

Step 3 — Clone, build, and run:

git clone https://github.com/LandmakTechnology/landmark_javaapp.git
cd landmark_javaapp
mvn clean package
java -jar target/simple-java-app-1.0-SNAPSHOT.jar

Step 4 — Open port 8081 in your Security Group:

1. Go to AWS Console → EC2 → Security Groups
2. Select the Security Group attached to your instance
3. Click Edit inbound rules → Add rule
4. Set: Type: Custom TCP | Port: 8081 | Source: 0.0.0.0/0
5. Click Save rules

Step 5 — Access the application in your browser:

http://<your-ec2-public-ip>:8081

Tip: To run the application in the background so it stays running after you close SSH:

nohup java -jar target/simple-java-app-1.0-SNAPSHOT.jar &

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Landmark Technology — Maven Web Application | DevOps Class 42 | Open Source