initial commit

2026-04-16 23:36:34 +02:00
commit 6f48e5d2ed
32 changed files with 5505 additions and 0 deletions
--- a/.envrc
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,49 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
+
+### nix / direnv
+.direnv
+result
+
+### jetty
+**/.jetty/home
+**/.jetty/base
+
+### Angualr Demo ###
+**/node_modules
--- a/.idea/.gitignore
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
--- a/.idea/encodings.xml
+++ b/.idea/encodings.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_23" default="true" project-jdk-name="openjdk-23" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
--- a/.idea/uiDesigner.xml
+++ b/.idea/uiDesigner.xml
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
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+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
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+        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
+        <initial-values>
+          <property name="text" value="Button" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="RadioButton" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="CheckBox" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="Label" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
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+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
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+      </item>
+      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.svg" removable="false" auto-create-binding="true" can-attach-label="true">
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+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
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+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.svg" removable="false" auto-create-binding="false" can-attach-label="false">
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+      </item>
+      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
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+        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
+      </item>
+    </group>
+  </component>
+</project>
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
--- a/.mvn/wrapper/maven-wrapper.jar
+++ b/.mvn/wrapper/maven-wrapper.jar
--- a/.mvn/wrapper/maven-wrapper.properties
+++ b/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.3.0/maven-wrapper-3.3.0.jar
--- a/bin/Kapitel7_Angular_Teil2_Praktikum.war
+++ b/bin/Kapitel7_Angular_Teil2_Praktikum.war
--- a/docs/.gitignore
+++ b/docs/.gitignore
@@ -0,0 +1,4 @@
+out
+latexout
+latex.out
+direnv
--- a/docs/uebungen/.latexmkrc
+++ b/docs/uebungen/.latexmkrc
@@ -0,0 +1,2 @@
+$out_dir = "out";
+$pdf_mode = 4;            # lualatex
--- a/docs/uebungen/uebung-1.tex
+++ b/docs/uebungen/uebung-1.tex
@@ -0,0 +1,140 @@
+\documentclass{uebung}
+
+\author{Linus Nagel}
+\chapter{1}
+
+\usepackage{listings}
+\usepackage{xcolor}
+
+\lstset{
+    language=Java,
+    basicstyle=\ttfamily\small,
+    keywordstyle=\color{blue},
+    commentstyle=\color{green!60!black},
+    stringstyle=\color{red},
+    numbers=left,
+    numberstyle=\tiny,
+    frame=single,
+    breaklines=true,
+    showspaces=false,
+    showtabs=false,
+    tabsize=2
+}
+
+\begin{document}
+
+\maketitle
+
+\begin{exercises}
+    \item \textbf{Welche Nachteile ergeben sich durch bisherige Schichtentrennung bei der Client-Server-Programmierung mit Stand-Alone Clients?}
+
+    Bei Stand-Alone Clients ergeben sich folgende Nachteile:
+    \begin{itemize}
+        \item Jeder Client öffnet eigene Datenbankverbindungen, was bei vielen Clients zu einer hohen Belastung des Datenbankservers führt.
+        \item Die Datenbankverbindungsdaten liegen als \texttt{.class}-Dateien auf dem Client und können per Decompiler ausgelesen werden – ein erhebliches Sicherheitsrisiko.
+        \item Es fehlt eine zentrale Kontrolle über Transaktionen, Caching und Ressourcenpooling.
+    \end{itemize}
+
+    \item \textbf{Welche Nachteile ergeben sich durch bisherige Schichtentrennung bei der Client-Server-Programmierung mit Web Clients?}
+
+    Bei Web Clients treten folgende Nachteile auf:
+    \begin{itemize}
+        \item Kein einfaches Clustering (Lastverteilung und Ausfallsicherheit).
+        \item Kein zentraler Cache – häufig angefragte Daten müssen immer wieder neu aus der Datenbank geladen werden.
+        \item Threadinterferenzen müssen manuell durch den Programmierer verhindert werden.
+    \end{itemize}
+
+    \item \textbf{Was ist ein Application Server?}
+
+    Ein Application Server ist eine Laufzeitumgebung für Jakarta EE-Komponenten. Er stellt Container (z.B. EJB-Container, Web-Container) bereit und bietet standardisierte Dienste wie Transaktionssteuerung (JTA), Sicherheit (JAAS), Namensdienst (JNDI), Messaging (JMS) und Persistenz (JPA). Bekannte Beispiele sind WildFly, WebSphere und WebLogic.
+
+    \item \textbf{Worum handelt es sich bei einer Session Bean?}
+
+    Eine Session Bean ist eine Komponente der Jakarta Enterprise Beans (EJB), die die Geschäftslogik einer verteilten Anwendung kapselt. Sie wird im EJB-Container des Application Servers ausgeführt und kann von Clients (lokal, remote oder als Webservice) aufgerufen werden. Es gibt drei Typen: Stateless, Stateful und Singleton Session Beans.
+
+    \item \textbf{Worin liegt der Unterschied zwischen Stateless und Stateful Session Beans?}
+
+    \begin{itemize}
+        \item \textbf{Stateless Session Bean:} Sie speichert keinen client-spezifischen Zustand. Der Container verwaltet einen Pool von Instanzen. Bei jedem Aufruf kann eine beliebige Instanz verwendet werden. Nach der Methode werden die Daten nicht aufbewahrt.
+        \item \textbf{Stateful Session Bean:} Sie behält über mehrere Aufrufe hinweg einen client-spezifischen Zustand. Für jeden Client wird eine eigene Instanz erzeugt und bei späteren Aufrufen dieselbe Instanz wiederverwendet.
+    \end{itemize}
+
+    \item \textbf{Welche Möglichkeiten gibt es für einen Aufruf einer Session Bean?}
+
+    \begin{itemize}
+        \item \textbf{Lokaler Aufruf:} Innerhalb derselben Java Virtual Machine (z.B. von einer anderen Bean).
+        \item \textbf{Remoter Aufruf:} Von einer anderen JVM (z.B. Standalone-Client).
+        \item \textbf{Webservice-Aufruf:} Nur für Stateless Session Beans möglich, über SOAP oder REST.
+    \end{itemize}
+
+    \item \textbf{Wie wird eine Stateless Session Bean erstellt?}
+
+    \begin{enumerate}
+        \item Erstellen eines Business-Interfaces (mit \texttt{@Remote} oder \texttt{@Local}), das die öffentlichen Methoden deklariert.
+        \item Erstellen einer Klasse, die das Interface implementiert und mit \texttt{@Stateless} annotiert wird.
+    \end{enumerate}
+
+    \item \textbf{Welche Schritte sind für einen Client notwendig, um eine Methode einer Stateless Session Bean aufzurufen?}
+
+    \begin{enumerate}
+        \item Erstellen eines \texttt{InitialContext} mit den nötigen Properties (z.B. Provider-URL, Context Factory).
+        \item Aufruf von \texttt{lookup()} mit dem JNDI-Namen der Bean.
+        \item Cast des zurückgegebenen Proxy-Objekts auf das Remote-Interface.
+        \item Aufruf der gewünschten Methode auf dem Proxy.
+    \end{enumerate}
+
+    \item \textbf{Wie muss eine Stateful Session Bean annotiert werden?}
+
+    Die Bean-Klasse wird mit \texttt{@Stateful} annotiert.
+
+    \item \textbf{Wie kann bei einer Stateful Session Bean angegeben werden, dass eine Bean-Instanz nicht mehr benötigt wird und vom Server zerstört werden kann?}
+
+    Eine Methode (z.B. \texttt{beenden()}) wird mit der Annotation \texttt{@Remove} versehen. Nach dem Aufruf dieser Methode zerstört der Container die Instanz.
+
+    \item \textbf{Welchen Unterschied gibt es bei Stateful Session Beans bezüglich des JNDI-Namens?}
+
+    Beim Lookup muss an den JNDI-Namen \texttt{?stateful} angehängt werden. Beispiel: \texttt{ejb:/meineBean?stateful}
+
+    \item \textbf{Worum handelt es sich bei Singleton Session Beans?}
+
+    Eine Singleton Session Bean wird nur einmal pro Application Server instanziiert. Diese eine Instanz wird von allen Clients gemeinsam genutzt. Sie eignet sich für globale Ressourcen oder zentrale Dienste.
+
+    \item \textbf{Wie werden Singleton Session Beans erstellt?}
+
+    Die Klasse wird mit \texttt{@Singleton} annotiert. Optional kann \texttt{@Startup} hinzugefügt werden, damit die Instanz bereits beim Serverstart erzeugt wird (sonst beim ersten Lookup).
+
+    \item \textbf{Welche Probleme können durch einen gemeinsamen Zugriff von mehreren Clients auf eine Singleton Session Bean theoretisch entstehen?}
+
+    Da mehrere Threads gleichzeitig auf dieselbe Instanz zugreifen können, kommt es zu Threadinterferenzen, wenn sie lesend und schreibend auf gemeinsame Daten zugreifen. Dies kann zu Dateninkonsistenz und unerwartetem Verhalten führen.
+
+    \item \textbf{Wie kann diesen Problemen programmatisch entgegnet werden?}
+
+    Es gibt zwei Ansätze:
+    \begin{itemize}
+        \item \textbf{Container Managed Concurrency (Standard):} Mit \texttt{@Lock(LockType.READ)} für lesende und \texttt{@Lock(LockType.WRITE)} für schreibende Methoden. Der Container sorgt dann für die nötige Synchronisation.
+        \item \textbf{Bean Managed Concurrency:} Die Bean wird mit \texttt{@ConcurrencyManagement(ConcurrencyManagementType.BEAN)} annotiert und der Programmierer verwendet eigene Synchronisationsmechanismen (z.B. \texttt{synchronized}).
+    \end{itemize}
+
+    \item \textbf{Erstellen Sie eine Stateless Session Bean, die eine Methode zur Verschlüsselung eines Strings bereitstellt.}
+
+    \textbf{Remote-Interface:} \lstinputlisting{code/aufgabe16/EncryptorRemote.java}
+
+    \textbf{Bean-Klasse:} \lstinputlisting{code/aufgabe16/Encryptor.java}
+
+    \textbf{Standalone-Client:} \lstinputlisting{code/aufgabe16/Client.java}
+
+    \item \textbf{Erstellen Sie eine Stateful Session Bean, die einen Zähler zur Verfügung stellt.}
+
+    \textbf{Remote-Interface:} \lstinputlisting{code/aufgabe17/CounterRemote.java}
+
+    \textbf{Bean-Klasse:} \lstinputlisting{code/aufgabe17/Counter.java}
+
+    \textbf{Client (mehrfache Aufrufe auf derselben Instanz):} \lstinputlisting{code/aufgabe17/CounterClient.java}
+
+    \item \textbf{Warum liefert die get-Methode aus Aufgabe 17 bei einem erneuten Aufruf der Testklasse immer wieder den Startwert des Zählers?}
+
+    Bei jedem Aufruf der \texttt{main}-Methode wird eine neue Instanz der Stateful Session Bean erzeugt, da der \texttt{lookup} jedes Mal eine frische Bean-Instanz zurückgibt. Der alte Zustand (Zählerstand) ist nur innerhalb derselben Client-Sitzung gültig. Wird das Client-Programm neu gestartet, gibt es eine neue Instanz mit dem Anfangswert 0. Möchte man den Zähler über mehrere Programmstarts hinweg speichern, müsste man ihn in einer Datenbank oder Datei persistieren.
+
+\end{exercises}
+
+\end{document}
--- a/docs/uebungen/uebung.cls
+++ b/docs/uebungen/uebung.cls
@@ -0,0 +1,146 @@
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesClass{uebung}[Sem3 Web Engineering Exercise Sheet Class]
+
+% Base class with options
+\LoadClass[11pt,a4paper]{article}
+
+% Required packages
+\RequirePackage[german]{babel}
+\RequirePackage{geometry}
+\RequirePackage{fancyhdr}
+\RequirePackage{titlesec}
+\RequirePackage{enumitem}
+\RequirePackage{listings}
+\RequirePackage{xcolor}
+\RequirePackage{graphicx}
+\RequirePackage{amsmath}
+\RequirePackage{hyperref}
+\RequirePackage{minted}
+
+% Minted config
+\usemintedstyle{default}
+
+% Define chapter counter for exercise sheets
+\newcounter{chapter}
+\renewcommand{\thechapter}{\arabic{chapter}}
+
+% Page geometry
+\geometry{a4paper, left=2.5cm, right=2.5cm, top=2.5cm, bottom=2.5cm}
+
+% Colors for code listings
+\definecolor{codegreen}{rgb}{0,0.6,0}
+\definecolor{codegray}{rgb}{0.5,0.5,0.5}
+\definecolor{codepurple}{rgb}{0.58,0,0.82}
+\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
+
+% Code listing style
+\lstdefinestyle{mystyle}{
+    backgroundcolor=\color{backcolour},
+    commentstyle=\color{codegreen},
+    keywordstyle=\color{magenta},
+    numberstyle=\tiny\color{codegray},
+    stringstyle=\color{codepurple},
+    basicstyle=\ttfamily\footnotesize,
+    breakatwhitespace=false,
+    breaklines=true,
+    captionpos=b,
+    keepspaces=true,
+    numbers=left,
+    numbersep=5pt,
+    showspaces=false,
+    showstringspaces=false,
+    showtabs=false,
+    tabsize=2,
+    frame=single,
+    framesep=5pt
+}
+
+\lstset{style=mystyle}
+
+% Header and footer setup
+\pagestyle{fancy}
+\fancyhf{}
+\fancyhead[L]{\textbf{Übung Web-Engineering}}
+\fancyhead[R]{\textbf{Aufgabenblatt zu Kapitel \thechapter}}
+\fancyfoot[C]{\thepage}
+
+% Title format
+\renewcommand{\maketitle}{
+    \begin{center}
+        \LARGE\textbf{Übung Web-Engineering}\\
+        \Large\textbf{Aufgabenblatt zu Kapitel \thechapter}
+        \vspace{1cm}
+
+        \large\textbf{Aufgaben – \@author}
+    \end{center}
+    \vspace{0.5cm}
+}
+
+% Section formatting
+\titleformat{\section}
+    {\large\bfseries}
+    {}
+    {0em}
+    {}
+    [\titlerule]
+
+% Exercise item formatting
+\newlist{exercises}{enumerate}{1}
+\setlist[exercises]{
+    label=\arabic*),
+    leftmargin=*,
+    itemsep=1em,
+    before=\vspace{1.0cm}
+}
+
+% Java code environment
+\lstnewenvironment{javaCode}[1][]
+    {\lstset{style=mystyle, language=Java, #1}}
+    {}
+
+% JSP/HTML code environment
+\lstnewenvironment{htmlCode}[1][]
+    {\lstset{style=mystyle, language=HTML, #1}}
+    {}
+
+% XML code environment
+\lstnewenvironment{xmlCode}[1][]
+    {\lstset{style=mystyle, language=XML, #1}}
+    {}
+
+% Subsection for code examples
+\newcommand{\codeexample}[1]{
+    \vspace{0.5em}
+    \noindent\textbf{Beispiel:}
+    \vspace{0.3em}
+    #1
+}
+
+% Environment for multi-page content
+\newenvironment{multipagecontent}
+    {\par\vspace{1em}}
+    {\par\vspace{1em}}
+
+% Command for page breaks with continuation marker
+\newcommand{\continuepage}{
+    \vfill
+    \centerline{\textit{Fortsetzung auf nächster Seite...}}
+    \newpage
+    \centerline{\textit{Fortsetzung von vorheriger Seite...}}
+    \vspace{1em}
+}
+
+% Hyperref setup
+\hypersetup{
+    colorlinks=true,
+    linkcolor=blue,
+    filecolor=magenta,
+    urlcolor=cyan,
+    pdftitle={Web Engineering Übungen},
+    pdfauthor={Linus Nagel}
+}
+
+% Chapter command for exercise sheets
+\newcommand{\chapter}[1]{\setcounter{chapter}{#1}}
+
+\endinput
--- a/flake.lock
+++ b/flake.lock
@@ -0,0 +1,78 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1763759067,
+        "narHash": "sha256-LlLt2Jo/gMNYAwOgdRQBrsRoOz7BPRkzvNaI/fzXi2Q=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "2cccadc7357c0ba201788ae99c4dfa90728ef5e0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1762844143,
+        "narHash": "sha256-SlybxLZ1/e4T2lb1czEtWVzDCVSTvk9WLwGhmxFmBxI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9da7f1cf7f8a6e2a7cb3001b048546c92a8258b4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9da7f1cf7f8a6e2a7cb3001b048546c92a8258b4",
+        "type": "github"
+      }
+    },
+    "nixpkgs-angular-cli": {
+      "locked": {
+        "lastModified": 1764947035,
+        "narHash": "sha256-EYHSjVM4Ox4lvCXUMiKKs2vETUSL5mx+J2FfutM7T9w=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a672be65651c80d3f592a89b3945466584a22069",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a672be65651c80d3f592a89b3945466584a22069",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1761765539,
+        "narHash": "sha256-b0yj6kfvO8ApcSE+QmA6mUfu8IYG6/uU28OFn4PaC8M=",
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "rev": "719359f4562934ae99f5443f20aa06c2ffff91fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nixpkgs.lib",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-angular-cli": "nixpkgs-angular-cli"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
--- a/flake.nix
+++ b/flake.nix
@@ -0,0 +1,172 @@
+{
+  description = "Web Engineering";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/9da7f1cf7f8a6e2a7cb3001b048546c92a8258b4";
+    nixpkgs-angular-cli.url = "github:NixOS/nixpkgs/a672be65651c80d3f592a89b3945466584a22069";
+  };
+
+  outputs = inputs @ {
+    flake-parts,
+    self,
+    ...
+  }:
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      imports = [];
+      systems = ["x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin"];
+      perSystem = {
+        config,
+        self',
+        inputs',
+        pkgs,
+        system,
+        ...
+      }:
+        with pkgs.lib; let
+          latexPackages = with pkgs; [
+            latexrun
+            (texlive.withPackages
+              (ps:
+                with ps; [
+                  amsmath
+                  biber
+                  biblatex
+                  changepage
+                  csquotes
+                  enumitem
+                  fontaxes
+                  latexmk
+                  listings
+                  minted
+                  newtx
+                  newtxsf
+                  newtxtt
+                  scheme-medium
+                  textpos
+                  times
+                  titlesec
+                  transparent
+                  upquote
+                ]))
+          ];
+
+          wildfly = pkgs.stdenvNoCC.mkDerivation {
+            name = "wildfly-39.0.0.Final";
+            src = pkgs.fetchzip {
+              url = "https://github.com/wildfly/wildfly/releases/download/39.0.0.Final/wildfly-39.0.0.Final.zip";
+              hash = "sha256-nfdb4doRRn4AwMQZkNYwIDBKIq4iY6diFX/WlPFQqZI=";
+            };
+            installPhase = ''
+              mkdir -p $out
+              cp -r $src/* $out/
+            '';
+          };
+
+          wildfly-fhs = pkgs.buildFHSEnv {
+            name = "wildfly-fhs";
+            targetPkgs = pkgs:
+              with pkgs; [
+                openjdk21
+                bash
+                coreutils
+              ];
+            runScript = "${wildfly}/bin/standalone.sh";
+            profile =
+              # bash
+              ''
+                export WILDFLY_BASE_DIR="$HOME/.wildfly-fhs-base"
+                mkdir -p "$WILDFLY_BASE_DIR"/{log,data,deployments,tmp,configuration}
+                if [ ! -f "$WILDFLY_BASE_DIR/configuration/standalone.xml" ]; then
+                  cp -r ${wildfly}/standalone/configuration/* "$WILDFLY_BASE_DIR/configuration/"
+                  chmod -R u+w "$WILDFLY_BASE_DIR/configuration/"
+                fi
+                export JBOSS_HOME=${wildfly}
+                export JBOSS_BASE_DIR="$WILDFLY_BASE_DIR"
+              '';
+          };
+        in {
+          # Per-system attributes can be defined here. The self' and inputs'
+          # module parameters provide easy access to attributes of the same
+          # system.
+          packages = with pkgs; let
+            fmtNum = strings.fixedWidthNumber 2;
+            fmtReleaseName = sem: author: chap: "${fmtNum sem} - ${fmtNum chap} - ${author.lastName}, ${author.firstName}.pdf";
+            fmtRelease = fmtReleaseName 3 {
+              firstName = "Linus";
+              lastName = "Nagel";
+            };
+            mkUebungPdf = n: args:
+              stdenvNoCC.mkDerivation rec {
+                name = fmtRelease n;
+                version = "1.0.0";
+                src = ./.;
+                buildInputs = latexPackages;
+                buildPhase =
+                  # sh
+                  ''
+                    cd docs/uebungen
+
+                    latexmk \
+                      -pdf \
+                      -l -dir-report -file-line-error -verbose \
+                      -interaction=nonstopmode \
+                      "uebung-${toString n}.tex"
+                  '';
+                installPhase =
+                  # sh
+                  ''
+                    mkdir -p $out/share $out/log $out/artifacts
+                    cp out/uebung-${toString n}.pdf "$out/share/${name}"
+                    cp out/*.log $out/log/
+                    cp -r out/* $out/artifacts
+                  '';
+              }
+              // args;
+          in {
+            "uebung-5" = mkUebungPdf 5 {};
+            "uebung-6" = mkUebungPdf 6 {};
+            "uebung-7" = mkUebungPdf 7 {};
+          };
+
+          devShells.default = with pkgs;
+            mkShell {
+              buildInputs = [wildfly-fhs pkgs.openjdk21];
+              nativeBuildInputs = [];
+              packages =
+                [
+                  mermaid-cli
+                  openjdk
+                  jetty
+                  maven
+                ]
+                ++ latexPackages;
+
+              shellHook =
+                # bash
+                ''
+                  export WILDFLY_BASE_DIR="$HOME/.wildfly-fhs-base"
+
+                  build() {
+                    # builds target/demo.war
+                    mvn clean package
+                  }
+
+                  # e.g. 'deploy target/demo.war'
+                  deploy() {
+                    cp -v "$1" "$WILDFLY_BASE_DIR/deployments/"
+                  }
+
+                  start() {
+                    wildfly-fhs
+                  }
+                '';
+            };
+        };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+      };
+    };
+}
--- a/316
+++ b/316
@@ -0,0 +1,316 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`\\unset -f command; \\command -v java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
--- a/mvnw.cmd
+++ b/mvnw.cmd
@@ -0,0 +1,188 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "@angular/cli": "^21.0.2",
+    "@angular/core": "^21.0.3"
+  }
+}
--- a/pom.xml
+++ b/pom.xml
@@ -0,0 +1,76 @@
+<?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>
+  <groupId>org.example</groupId>
+  <artifactId>demo</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <name>demo</name>
+  <packaging>war</packaging>
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.report.sourceEncoding>UTF-8</project.report.sourceEncoding>
+    <maven.compiler.release>21</maven.compiler.release>
+    <junit.version>5.11.0-M2</junit.version>
+    <compiler-plugin.version>3.13.0</compiler-plugin.version>
+    <war-plugin.version>3.4.0</war-plugin.version>
+  </properties>
+  <dependencies>
+    <dependency>
+      <groupId>jakarta.platform</groupId>
+      <artifactId>jakarta.jakartaee-web-api</artifactId>
+      <version>11.0.0</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.glassfish</groupId>
+      <artifactId>jakarta.faces</artifactId>
+      <version>4.1.3</version>
+    </dependency>
+    <dependency>
+      <groupId>jakarta.enterprise</groupId>
+      <artifactId>jakarta.enterprise.cdi-api</artifactId>
+      <version>4.1.0</version>
+    </dependency>
+    <dependency>
+      <groupId>jakarta.enterprise</groupId>
+      <artifactId>jakarta.enterprise.cdi-el-api</artifactId>
+      <version>4.1.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.jboss.weld.servlet</groupId>
+      <artifactId>weld-servlet-core</artifactId>
+      <version>5.1.2.Final</version>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <version>${junit.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <version>1.18.30</version>
+    </dependency>
+    <dependency>
+      <groupId>org.primefaces</groupId>
+      <artifactId>primefaces</artifactId>
+      <version>15.0.3</version>
+      <classifier>jakarta</classifier>
+    </dependency>
+  </dependencies>
+  <build>
+    <finalName>demo</finalName>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>${compiler-plugin.version}</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-war-plugin</artifactId>
+        <version>${war-plugin.version}</version>
+      </plugin>
+    </plugins>
+  </build>
+</project>
--- a/src/main/java/org/example/demo/uebung1/aufgabe16/Client.java
+++ b/src/main/java/org/example/demo/uebung1/aufgabe16/Client.java
@@ -0,0 +1,22 @@
+package org.example.demo.uebung1.aufgabe16;
+import javax.naming.InitialContext;
+import javax.naming.Context;
+import java.util.Properties;
+
+public class Client {
+    public static void main(String[] args) throws Exception {
+        Properties props = new Properties();
+        props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
+                          "org.wildfly.naming.client.WildFlyInitialContextFactory");
+        props.setProperty(Context.PROVIDER_URL, "http-remoting://localhost:8080");
+
+        InitialContext ctx = new InitialContext(props);
+        EncryptorRemote encryptor = (EncryptorRemote) ctx.lookup(
+            "ejb:/IhrProjektname/Encryptor!encryption.EncryptorRemote");
+
+        String original = "Hallo Welt";
+        String encrypted = encryptor.encrypt(original);
+        System.out.println("Original: " + original);
+        System.out.println("Verschlüsselt: " + encrypted);
+    }
+}
--- a/src/main/java/org/example/demo/uebung1/aufgabe16/Encryptor.java
+++ b/src/main/java/org/example/demo/uebung1/aufgabe16/Encryptor.java
@@ -0,0 +1,14 @@
+package org.example.demo.uebung1.aufgabe16;
+import jakarta.ejb.Stateless;
+
+@Stateless
+public class Encryptor implements EncryptorRemote {
+    @Override
+    public String encrypt(String input) {
+        StringBuilder result = new StringBuilder();
+        for (char c : input.toCharArray()) {
+            result.append((char)(c + 5));
+        }
+        return result.toString();
+    }
+}
--- a/src/main/java/org/example/demo/uebung1/aufgabe16/EncryptorRemote.java
+++ b/src/main/java/org/example/demo/uebung1/aufgabe16/EncryptorRemote.java
@@ -0,0 +1,7 @@
+package org.example.demo.uebung1.aufgabe16;
+import jakarta.ejb.Remote;
+
+@Remote
+public interface EncryptorRemote {
+    String encrypt(String input);
+}
--- a/src/main/java/org/example/demo/uebung1/aufgabe17/Counter.java
+++ b/src/main/java/org/example/demo/uebung1/aufgabe17/Counter.java
@@ -0,0 +1,12 @@
+package org.example.demo.uebung1.aufgabe17;
+import jakarta.ejb.Stateful;
+
+@Stateful
+public class Counter implements CounterRemote {
+    private int value = 0;
+
+    @Override
+    public int getAndIncrement() {
+        return value++;
+    }
+}
--- a/src/main/java/org/example/demo/uebung1/aufgabe17/CounterClient.java
+++ b/src/main/java/org/example/demo/uebung1/aufgabe17/CounterClient.java
@@ -0,0 +1,21 @@
+package org.example.demo.uebung1.aufgabe17;
+import javax.naming.InitialContext;
+import javax.naming.Context;
+import java.util.Properties;
+
+public class CounterClient {
+    public static void main(String[] args) throws Exception {
+        Properties props = new Properties();
+        props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
+                          "org.wildfly.naming.client.WildFlyInitialContextFactory");
+        props.setProperty(Context.PROVIDER_URL, "http-remoting://localhost:8080");
+
+        InitialContext ctx = new InitialContext(props);
+        CounterRemote counter = (CounterRemote) ctx.lookup(
+            "ejb:/IhrProjektname/Counter!counter.CounterRemote?stateful");
+
+        System.out.println(counter.getAndIncrement());
+        System.out.println(counter.getAndIncrement());
+        System.out.println(counter.getAndIncrement());
+    }
+}
--- a/src/main/java/org/example/demo/uebung1/aufgabe17/CounterRemote.java
+++ b/src/main/java/org/example/demo/uebung1/aufgabe17/CounterRemote.java
@@ -0,0 +1,7 @@
+package org.example.demo.uebung1.aufgabe17;
+import jakarta.ejb.Remote;
+
+@Remote
+public interface CounterRemote {
+    int getAndIncrement();
+}
--- a/src/main/resources/META-INF/beans.xml
+++ b/src/main/resources/META-INF/beans.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="https://jakarta.ee/xml/ns/jakartaee"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/beans_4_1.xsd">
+
+</beans>
--- a/src/main/resources/META-INF/persistence.xml
+++ b/src/main/resources/META-INF/persistence.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<persistence xmlns="https://jakarta.ee/xml/ns/persistence"
+             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+             xsi:schemaLocation="https://jakarta.ee/xml/ns/persistence https://jakarta.ee/xml/ns/persistence/persistence_3_2.xsd"
+             version="3.2">
+  <persistence-unit name="default">
+
+  </persistence-unit>
+</persistence>
--- a/src/main/webapp/WEB-INF/beans.xml
+++ b/src/main/webapp/WEB-INF/beans.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="https://jakarta.ee/xml/ns/jakartaee"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/beans_4_0.xsd"
+       version="4.0" bean-discovery-mode="annotated">
+</beans>
--- a/src/main/webapp/WEB-INF/faces-config.xml
+++ b/src/main/webapp/WEB-INF/faces-config.xml
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faces-config xmlns="https://jakarta.ee/xml/ns/jakartaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="4.0" xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee                                   https://jakarta.ee/xml/ns/jakartaee/web-facesconfig_4_0.xsd">
+</faces-config>
--- a/src/main/webapp/WEB-INF/web.xml
+++ b/src/main/webapp/WEB-INF/web.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns="https://jakarta.ee/xml/ns/jakartaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_6_0.xsd"
+         version="6.0">
+
+    <context-param>
+        <param-name>jakarta.faces.CONFIG_FILES</param-name>
+        <param-value>/WEB-INF/faces-config.xml</param-value>
+    </context-param>
+
+    <servlet>
+        <servlet-name>Faces Servlet</servlet-name>
+        <servlet-class>jakarta.faces.webapp.FacesServlet</servlet-class>
+        <load-on-startup>1</load-on-startup>
+    </servlet>
+
+    <servlet-mapping>
+        <servlet-name>Faces Servlet</servlet-name>
+        <url-pattern>*.xhtml</url-pattern>
+    </servlet-mapping>
+</web-app>