Servlet und Web

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>at.aydin.academy</groupId>
        <artifactId>09servletweb-pair</artifactId>
        <version>1.0.0</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <artifactId>servlet-web-legacy</artifactId>
    <packaging>jar</packaging>
    <name>Servlet Web Legacy (Jetty 10 / javax)</name>
    <dependencies>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-server</artifactId>
            <version>${jetty10.version}</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-servlet</artifactId>
            <version>${jetty10.version}</version>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
            </plugin>

        </plugins>
    </build>
</project>

package at.aydin.lab.web.legacy;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;

public final class ServletLegacyApplication {
    private ServletLegacyApplication() {
    }

    public static void main(String[] args) throws Exception {
        Server server = new Server(8083);
        ServletContextHandler context = new ServletContextHandler();
        context.setContextPath("/");
        context.addServlet(new ServletHolder(new StatusServlet()), "/status");
        server.setHandler(context);
        server.start();
        System.out.println("Legacy Servlet: http://localhost:8083/status");
        server.join();
    }
}

package at.aydin.lab.web.legacy;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class StatusServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setStatus(200);
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().write(statusJson());
    }

    // Design Pattern: Front Controller (kleine Demonstration)
    // Zweck: Ein zentraler Servlet-Endpunkt verarbeitet den HTTP-Aufruf.
    static String statusJson() {
        return "{\"status\":\"UP\",\"stack\":\"javax.servlet\"}";
    }
}

package at.aydin.lab.web.legacy;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertTrue;

class StatusServletTest {
    @Test
    void statusIsUp() {
        assertTrue(StatusServlet.statusJson().contains("UP"));
    }
}