Task 1: Java Backend and REST API Example

This task involves implementing a Java application that provides a REST API for managing "task" objects. These task objects represent shell commands that can be executed within a Kubernetes pod.

Project Structure

• task-api/: The Java Spring Boot application (to be implemented).
• README.md: This documentation file.

Task Object Structure

Each task object should have the following properties:

• id (String): Task ID
• name (String): Task name
• owner (String): Task owner
• command (String): Shell command to be run
• taskExecutions (List): A list of task execution records.

TaskExecution Object Structure

Each TaskExecution object should contain:

• startTime (Date): Execution start date/time
• endTime (Date): Execution end date/time
• output (String): Command output

Sample JSON Object

{
  "id": "123",
  "name": "Print Hello",
  "owner": "John Smith",
  "command": "echo Hello World again!",
  "taskExecutions": [
    {
      "startTime": "2023-04-21 15:51:42.276Z",
      "endTime": "2023-04-21 15:51:43.276Z",
      "output": "Hello World!"
    },
    {
      "startTime": "2023-04-21 15:52:42.276Z",
      "endTime": "2023-04-21 15:52:43.276Z",
      "output": "Hello World again!"
    }
  ]
}

REST API Endpoints

The application should expose the following REST API endpoints:

• GET /tasks

  • Returns all task objects if no parameters are passed.
  • If a task ID is passed as a parameter, it should return a single task or a 404 Not Found error if no such task exists.

• PUT /tasks

  • Accepts a task object as a JSON-encoded message body.
  • The application must validate the command provided in the request to ensure it does not contain unsafe or malicious code.

How to Access and Run the Project

1. Clone the Repository: If you haven't already, clone this repository to your local machine.

   git clone <repository-url>
   cd task1-java-backend

2. Navigate to the task-api directory: The core Java backend application will be located in the task-api subdirectory.

   cd task-api

3. Build the Application: Use Maven to build the project.

   ./mvnw clean install

4. Run the Application: Once built, you can run the Spring Boot application.

   java -jar target/taskmanager-1.0.0.jar

   (Note: The exact JAR name might vary based on your pom.xml configuration.)

5. Access the API: Once the application is running, the REST API will typically be accessible at http://localhost:8080 (or another port if configured differently).