Created task 02.

.gitignore

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+**/.idea
+**/target

task02/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>task02</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>18</maven.compiler.source>
+        <maven.compiler.target>18</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.javalin</groupId>
+            <artifactId>javalin</artifactId>
+            <version>5.4.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>2.0.6</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.14.2</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.9.2</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.rest-assured</groupId>
+            <artifactId>rest-assured</artifactId>
+            <version>5.3.0</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

task02/src/main/java/de/hftstuttgart/vs/task02/Main.java

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+package de.hftstuttgart.vs.task02;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import io.javalin.Javalin;
+
+public class Main {
+
+    /**
+     * Record that represents a user.
+     *
+     * @param id find a better type the object (There are multiple solutions)
+     * @param firstName first name of user
+     * @param lastName last name of user
+     */
+    public record User(Object id, String firstName, String lastName) {}
+
+    /**
+     * Why do we need a synchronized list?
+     */
+    private final List<User> users = Collections.synchronizedList(new ArrayList<>());
+
+    /**
+     * Develop a rest api which can execute the following tasks:
+     * - get a list of all users (return empty array if there is no user stored)
+     * - return a single user by their id (return 404 if user doesn't exist)
+     * - create a new user (return the correct http status)
+     *
+     * Beside developing the functionalities you should also define the endpoints.
+     *
+     * Further Information about http status codes: https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
+     *
+     * @param args can be ignored
+     */
+    public static void main(final String[] args) {
+        final var app = Javalin.create()
+                .start(7070);
+
+        app.get("/", ctx -> ctx.json(new User("test_id", "Max", "Mustermann")));
+    }
+
+
+}

task02/src/test/java/de/hftstuttgart/vs/task02/MainTest.java

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+package de.hftstuttgart.vs.task02;
+
+import static io.restassured.RestAssured.given;
+
+import org.junit.jupiter.api.Test;
+
+class MainTest {
+
+    //TODO: Change path (and maybe the http method)
+    @Test
+    void getAllUsers() {
+        given()
+                .log().all()
+                .port(7070).
+        when().
+                get("").
+        then().
+                log().all();
+    }
+
+    //TODO: Change path (and maybe the http method)
+    @Test
+    void getSpecificUser() {
+        given()
+                .log().all()
+                .port(7070).
+        when().
+                get("").
+        then().
+                log().all();
+    }
+
+    //TODO: Change path (and maybe the http method)
+    @Test
+    void addUser() {
+        given()
+                .log().all()
+                .port(7070).
+        when().
+                get("").
+        then().
+                log().all();
+    }
+
+}