From 4e6161cfd72997ad803ca47dc12ea413e76e6acf Mon Sep 17 00:00:00 2001
From: Martin Goik <goik@hdm-stuttgart.de>
Date: Thu, 8 Oct 2015 22:17:51 +0200
Subject: [PATCH] Adding simplified GUI, part 2

---
 Doc/Sda1/jdbc.xml                             | 125 ++++++++--
 P/Sda1/InsertGui/V4/.gitignore                |   6 +
 P/Sda1/InsertGui/V4/README.md                 |  37 +++
 P/Sda1/InsertGui/V4/Schema/schema.sql         |   7 +
 P/Sda1/InsertGui/V4/pom.xml                   | 215 ++++++++++++++++++
 .../java/de/hdm_stuttgart/mi/LoginUI.java     | 134 +++++++++++
 .../hdm_stuttgart/mi/MyAppWidgetset.gwt.xml   |   6 +
 .../V4/src/main/resources/log4j2.xml          |  24 ++
 .../webapp/VAADIN/themes/mytheme/addons.scss  |   7 +
 .../webapp/VAADIN/themes/mytheme/favicon.ico  | Bin 0 -> 31005 bytes
 .../webapp/VAADIN/themes/mytheme/mytheme.scss |  36 +++
 .../webapp/VAADIN/themes/mytheme/styles.scss  |  11 +
 P/pom.xml                                     |   3 +
 13 files changed, 595 insertions(+), 16 deletions(-)
 create mode 100644 P/Sda1/InsertGui/V4/.gitignore
 create mode 100644 P/Sda1/InsertGui/V4/README.md
 create mode 100644 P/Sda1/InsertGui/V4/Schema/schema.sql
 create mode 100644 P/Sda1/InsertGui/V4/pom.xml
 create mode 100644 P/Sda1/InsertGui/V4/src/main/java/de/hdm_stuttgart/mi/LoginUI.java
 create mode 100644 P/Sda1/InsertGui/V4/src/main/resources/de/hdm_stuttgart/mi/MyAppWidgetset.gwt.xml
 create mode 100644 P/Sda1/InsertGui/V4/src/main/resources/log4j2.xml
 create mode 100644 P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/addons.scss
 create mode 100644 P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/favicon.ico
 create mode 100644 P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/mytheme.scss
 create mode 100644 P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/styles.scss

diff --git a/Doc/Sda1/jdbc.xml b/Doc/Sda1/jdbc.xml
index 62268ab56..6acdfa08c 100644
--- a/Doc/Sda1/jdbc.xml
+++ b/Doc/Sda1/jdbc.xml
@@ -1120,7 +1120,7 @@ public class SimpleInsert {
       </qandaset>
     </section>
 
-    <section xml:id="sectSimpleInsertGui">
+    <section xml:id="sda1SectSimpleInsertGui">
       <title>A first GUI sketch</title>
 
       <para>So far all data records being written to the database server by
@@ -1150,16 +1150,35 @@ public class SimpleInsert {
 
       <para>Based on your existing JavaFX GUI experience the subsequent GUI
       employs the <link xlink:href="https://vaadin.com/book/-/page">Vaadin
-      application framework</link>.</para>
+      application framework</link>. Suggested reading:</para>
 
-      <qandaset defaultlabel="qanda" xml:id="quandaentry_GuiDb">
+      <itemizedlist>
+        <listitem>
+          <para><link
+          xlink:href="https://vaadin.com/book/vaadin7/-/page/application.html">Writing
+          a Server-Side Web Application</link></para>
+        </listitem>
+
+        <listitem>
+          <para><link xlink:href="https://vaadin.com/maven">Creating a maven
+          based Vaadin project.</link></para>
+        </listitem>
+
+        <listitem>
+          <para><link
+          xlink:href="https://vaadin.com/book/-/page/application.notifications.html">Notifications</link></para>
+        </listitem>
+      </itemizedlist>
+
+      <qandaset defaultlabel="qanda" xml:id="sda1QandaSimpleInsertGui">
         <title>GUI for inserting Person data to a database server</title>
 
         <qandadiv>
           <qandaentry>
             <question>
-              <para>Write a WEB GUI application as being outlined in <xref
-              linkend="simpleInsertGui"/>. You may proceed as follows:</para>
+              <para>Write a WEB GUI based application as being outlined in
+              <xref linkend="simpleInsertGui"/>. You may proceed as
+              follows:</para>
 
               <orderedlist>
                 <listitem>
@@ -1175,17 +1194,19 @@ public class SimpleInsert {
                   button. Return this string to the user as being shown in the
                   message window of <xref linkend="simpleInsertGui"/>.</para>
 
-                  <para>At this point you still do not need a database
-                  connection. The message shown to the user is just a fake, so
-                  the GUI <emphasis role="bold">appears</emphasis> to be
+                  <para>You do not (yet) need a database connection. The
+                  message shown to the user is just a mock up making the GUI
+                  <emphasis role="bold">appear</emphasis> to be
                   working.</para>
                 </listitem>
 
                 <listitem>
                   <para>Establish a <classname>java.sql.Connection</classname>
-                  and create a <classname>java.sql.Statement</classname>
-                  instance when launching your application. Use the latter in
-                  your <classname>java.awt.event.ActionListener</classname> to
+                  to your favourite database server (providing a suitable
+                  table) and create a
+                  <classname>java.sql.Statement</classname> instance when
+                  launching your application. Use the latter in your
+                  <classname>java.awt.event.ActionListener</classname> to
                   actually insert datasets into your database.</para>
                 </listitem>
 
@@ -1198,10 +1219,12 @@ public class SimpleInsert {
             </question>
 
             <answer>
-              <para>The complete implementation resides in
-              <classname>P/Sda1/InsertGui/V2</classname>. The included
-              README.md contains hints with respect to starting this
-              application.</para>
+              <annotation role="make">
+                <para role="eclipse">P/Sda1/InsertGui/V2</para>
+              </annotation>
+
+              <para>The included README.md contains hints with respect to
+              starting this application.</para>
 
               <para>Notice the separation of problem related messages:</para>
 
@@ -1222,7 +1245,9 @@ public class SimpleInsert {
 
                 <callout arearefs="sda1JdbcMsgEnduserProgrammer-2-co"
                          xml:id="sda1JdbcMsgEnduserProgrammer-2">
-                  <para>Detailed message to the application developer.</para>
+                  <para>Detailed message to the application developer being
+                  directed to the log file <filename>A1.log</filename> as
+                  being configured in <filename>log4j2.xml</filename>. </para>
                 </callout>
               </calloutlist>
             </answer>
@@ -1231,6 +1256,74 @@ public class SimpleInsert {
       </qandaset>
     </section>
 
+    <section xml:id="sda1SectSimpleInsertGuiErrorHandling">
+      <title>Input validation and error handling</title>
+
+      <qandaset defaultlabel="qanda"
+                xml:id="sda1QandaSimpleInsertGuiErrorHandling">
+        <qandadiv>
+          <qandaentry>
+            <question>
+              <para>The solution of <xref linkend="sda1QandaSimpleInsertGui"/>
+              does have deficiencies:</para>
+
+              <orderedlist>
+                <listitem>
+                  <para>There is no input data validation. Even if both fields
+                  remain blank hitting Insert will still trigger a database
+                  <code>INSERT INTO Person VALUES('', '')</code>
+                  attempt.</para>
+
+                  <tip>
+                    <para>Read about <link
+                    xlink:href="https://vaadin.com/book/vaadin7/-/page/components.fields.html#components.fields.validation">input
+                    field valuators</link>. Then use <methodname
+                    xlink:href="https://vaadin.com/api/com/vaadin/ui/Component.html#setEnabled(boolean)">setEnabled(...)</methodname>
+                    to activate and de-activate the <code>Insert</code> button
+                    accordingly.</para>
+                  </tip>
+                </listitem>
+
+                <listitem>
+                  <para>Trying to insert a second record having identical
+                  email address will fail due to a primary key violation. This
+                  exception type should be explained to the end user in a
+                  meaningful fashion.</para>
+
+                  <tip>
+                    <para>There are various ways to deal with this problem.
+                    Analyzing the precise type of SQLException allows for
+                    distinguishing primary key constraint violations from
+                    other problem types like e.g. database (link layer)
+                    communication failures. Examine the instance's precise
+                    exception class. Then modify your <code>try {} catch
+                    {}</code> code.</para>
+                  </tip>
+                </listitem>
+              </orderedlist>
+            </question>
+
+            <answer>
+              <annotation role="make">
+                <para role="eclipse">P/Sda1/InsertGui/V4</para>
+              </annotation>
+
+              <para>Creating appropriate primary key violation messages will
+              only work for databases of type
+              <productname>Mysql</productname>. Other database type require
+              different classes.</para>
+
+              <para>A more general way to deal with this problem is trying to
+              <code>SELECT</code> a dataset having the email address in
+              question. If the result is non-empty the INSERT will not happen
+              thus avoiding the attempt in the first place rather than giving
+              rise to an exception.</para>
+            </answer>
+          </qandaentry>
+        </qandadiv>
+      </qandaset>
+    </section>
+
     <section xml:id="jdbcExceptions">
       <title>Handling possible exceptions</title>
 
diff --git a/P/Sda1/InsertGui/V4/.gitignore b/P/Sda1/InsertGui/V4/.gitignore
new file mode 100644
index 000000000..c761c2a94
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/.gitignore
@@ -0,0 +1,6 @@
+/target/
+/.settings/
+src/main/webapp/VAADIN/themes/mytheme/styles.scss.cache
+A1.log
+.classpath
+.project
diff --git a/P/Sda1/InsertGui/V4/README.md b/P/Sda1/InsertGui/V4/README.md
new file mode 100644
index 000000000..9c49b3ff9
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/README.md
@@ -0,0 +1,37 @@
+addressinsert
+==============
+
+Inserting address records into a relational database.
+
+Workflow
+========
+
+To compile the entire project, run "mvn install".
+To run the application, run "mvn jetty:run" and open http://localhost:8080/ .
+
+To develop the theme, simply update the relevant theme files and reload the application.
+Pre-compiling a theme eliminates automatic theme updates at runtime - see below for more information.
+
+Debugging client side code
+  - run "mvn vaadin:run-codeserver" on a separate console while the application is running
+  - activate Super Dev Mode in the debug window of the application
+
+To produce a deployable production mode WAR:
+- change productionMode to true in the servlet class configuration (nested in the UI class)
+- run "mvn clean vaadin:compile-theme package"
+  - See below for more information. Running "mvn clean" removes the pre-compiled theme.
+- test with "mvn jetty:run-war
+
+Using a precompiled theme
+-------------------------
+
+When developing the application, Vaadin can compile the theme on the fly when needed,
+or the theme can be precompiled to speed up page loads.
+
+To precompile the theme run "mvn vaadin:compile-theme". Note, though, that once
+the theme has been precompiled, any theme changes will not be visible until the
+next theme compilation or running the "mvn clean" target.
+
+When developing the theme, running the application in the "run" mode (rather than
+in "debug") in the IDE can speed up consecutive on-the-fly theme compilations
+significantly.
diff --git a/P/Sda1/InsertGui/V4/Schema/schema.sql b/P/Sda1/InsertGui/V4/Schema/schema.sql
new file mode 100644
index 000000000..327a0f5ea
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/Schema/schema.sql
@@ -0,0 +1,7 @@
+CREATE TABLE Person (
+   name CHAR(20) NOT NULL,
+   email CHAR(20) PRIMARY KEY
+
+);
+
+SELECT * FROM Person;
\ No newline at end of file
diff --git a/P/Sda1/InsertGui/V4/pom.xml b/P/Sda1/InsertGui/V4/pom.xml
new file mode 100644
index 000000000..4f730bcd8
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/pom.xml
@@ -0,0 +1,215 @@
+<?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>
+
+	<parent>
+		<groupId>de.hdm-stuttgart.mi</groupId>
+		<artifactId>lecturenotes-pom</artifactId>
+		<version>1.0</version>
+		<relativePath>../../../pom.xml</relativePath>
+	</parent>
+
+	<groupId>de.hdm_stuttgart.mi</groupId>
+	<artifactId>addressinsert</artifactId>
+	<packaging>war</packaging>
+	<version>4.0</version>
+	<name>addressinsert</name>
+
+	<properties>
+		<vaadin.version>7.5.7</vaadin.version>
+		<vaadin.plugin.version>${vaadin.version}</vaadin.plugin.version>
+		<jetty.plugin.version>9.2.3.v20140905</jetty.plugin.version>
+		<project.source.version>1.8</project.source.version>
+		<project.target.version>1.8</project.target.version>
+		<project.encoding>UTF-8</project.encoding>
+	</properties>
+
+	<repositories>
+		<repository>
+			<id>vaadin-addons</id>
+			<url>http://maven.vaadin.com/vaadin-addons</url>
+		</repository>
+		<repository>
+			<id>vaadin-snapshots</id>
+			<url>https://oss.sonatype.org/content/repositories/vaadin-snapshots/</url>
+			<releases>
+				<enabled>false</enabled>
+			</releases>
+			<snapshots>
+				<enabled>true</enabled>
+			</snapshots>
+		</repository>
+	</repositories>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>com.vaadin</groupId>
+				<artifactId>vaadin-bom</artifactId>
+				<version>${vaadin.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+	<dependencies>
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>javax.servlet-api</artifactId>
+			<version>3.0.1</version>
+			<scope>provided</scope>
+		</dependency>
+		<dependency>
+			<groupId>com.vaadin</groupId>
+			<artifactId>vaadin-server</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.vaadin</groupId>
+			<artifactId>vaadin-push</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.vaadin</groupId>
+			<artifactId>vaadin-client</artifactId>
+			<scope>provided</scope>
+		</dependency>
+		<!-- Needed when using the widgetset optimizer (custom ConnectorBundleLoaderFactory). 
+			For widgetset compilation, vaadin-client-compiler is automatically added 
+			on the compilation classpath by vaadin-maven-plugin so normally there is 
+			no need for an explicit dependency. -->
+		<!-- <dependency> <groupId>com.vaadin</groupId> <artifactId>vaadin-client-compiler</artifactId> 
+			<scope>provided</scope> </dependency> -->
+		<dependency>
+			<groupId>com.vaadin</groupId>
+			<artifactId>vaadin-themes</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+			<version>5.1.35</version>
+		</dependency>
+
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-resources-plugin</artifactId>
+				<version>2.6</version>
+				<configuration>
+					<encoding>${project.encoding}</encoding>
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-war-plugin</artifactId>
+				<version>2.3</version>
+				<configuration>
+					<failOnMissingWebXml>false</failOnMissingWebXml>
+					<!-- Exclude some unnecessary files generated by the GWT compiler. -->
+					<packagingExcludes>WEB-INF/classes/VAADIN/gwt-unitCache/**,
+						WEB-INF/classes/VAADIN/widgetsets/WEB-INF/**</packagingExcludes>
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>com.vaadin</groupId>
+				<artifactId>vaadin-maven-plugin</artifactId>
+				<version>${vaadin.plugin.version}</version>
+				<configuration>
+					<extraJvmArgs>-Xmx512M -Xss1024k</extraJvmArgs>
+					<webappDirectory>${basedir}/target/classes/VAADIN/widgetsets</webappDirectory>
+					<draftCompile>false</draftCompile>
+					<compileReport>false</compileReport>
+					<style>OBF</style>
+					<strict>true</strict>
+				</configuration>
+				<executions>
+					<execution>
+						<goals>
+							<goal>update-theme</goal>
+							<goal>update-widgetset</goal>
+							<goal>compile</goal>
+							<!-- disabled by default to use on-the-fly theme compilation -->
+							<!-- <goal>compile-theme</goal> -->
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-source-plugin</artifactId>
+				<version>2.4</version>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-clean-plugin</artifactId>
+				<version>2.6.1</version>
+				<!-- Clean up also any pre-compiled themes -->
+				<configuration>
+					<filesets>
+						<fileset>
+							<directory>src/main/webapp/VAADIN/themes</directory>
+							<includes>
+								<include>**/styles.css</include>
+								<include>**/styles.scss.cache</include>
+							</includes>
+						</fileset>
+					</filesets>
+				</configuration>
+			</plugin>
+
+			<!-- The Jetty plugin allows us to easily test the development build by 
+				running jetty:run on the command line. -->
+			<plugin>
+				<groupId>org.eclipse.jetty</groupId>
+				<artifactId>jetty-maven-plugin</artifactId>
+				<version>${jetty.plugin.version}</version>
+				<configuration>
+					<scanIntervalSeconds>2</scanIntervalSeconds>
+				</configuration>
+			</plugin>
+		</plugins>
+
+		<pluginManagement>
+			<plugins>
+				<!--This plugin's configuration is used to store Eclipse m2e settings 
+					only. It has no influence on the Maven build itself. -->
+				<!-- TODO Remove when http://dev.vaadin.com/ticket/14924 is resolved -->
+				<plugin>
+					<groupId>org.eclipse.m2e</groupId>
+					<artifactId>lifecycle-mapping</artifactId>
+					<version>1.0.0</version>
+					<configuration>
+						<lifecycleMappingMetadata>
+							<pluginExecutions>
+								<pluginExecution>
+									<pluginExecutionFilter>
+										<groupId>com.vaadin</groupId>
+										<artifactId>
+											vaadin-maven-plugin
+										</artifactId>
+										<versionRange>[7.1.11,)</versionRange>
+										<goals>
+											<goal>resources</goal>
+											<goal>update-widgetset</goal>
+											<goal>compile</goal>
+											<goal>compile-theme</goal>
+											<goal>update-theme</goal>
+										</goals>
+									</pluginExecutionFilter>
+									<action>
+										<ignore></ignore>
+									</action>
+								</pluginExecution>
+							</pluginExecutions>
+						</lifecycleMappingMetadata>
+					</configuration>
+				</plugin>
+			</plugins>
+		</pluginManagement>
+
+	</build>
+
+</project>
diff --git a/P/Sda1/InsertGui/V4/src/main/java/de/hdm_stuttgart/mi/LoginUI.java b/P/Sda1/InsertGui/V4/src/main/java/de/hdm_stuttgart/mi/LoginUI.java
new file mode 100644
index 000000000..a81e57eab
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/src/main/java/de/hdm_stuttgart/mi/LoginUI.java
@@ -0,0 +1,134 @@
+package de.hdm_stuttgart.mi;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import javax.servlet.annotation.WebServlet;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException;
+import com.vaadin.annotations.Theme;
+import com.vaadin.annotations.VaadinServletConfiguration;
+import com.vaadin.annotations.Widgetset;
+import com.vaadin.data.validator.EmailValidator;
+import com.vaadin.server.VaadinRequest;
+import com.vaadin.server.VaadinServlet;
+import com.vaadin.server.ClientConnector.DetachListener;
+import com.vaadin.ui.Button;
+import com.vaadin.ui.GridLayout;
+import com.vaadin.ui.Label;
+import com.vaadin.ui.Notification;
+import com.vaadin.ui.TextField;
+import com.vaadin.ui.UI;
+
+@Theme("mytheme")
+@Widgetset("de.hdm_stuttgart.mi.MyAppWidgetset")
+public class LoginUI extends UI implements DetachListener {
+
+   private static final long serialVersionUID = 9013400739498375365L;
+   
+   private static Logger log = LogManager.getLogger(LoginUI.class);
+
+   Statement stmt;
+   
+   private final TextField
+      nameField = new TextField(), 
+      emailField = new TextField();
+
+   private Button
+      insertButton = new Button("Insert");
+
+	public LoginUI () {
+	   final String jdbcUrl = "jdbc:mysql://localhost:3306/hdm";
+	   try {
+		final Connection conn = DriverManager.getConnection(
+				jdbcUrl, "hdmuser", "XYZ");
+		stmt = conn.createStatement();
+	   } catch (SQLException ex) {
+	      log.error("Unable to connect to database using '" + jdbcUrl + "':", ex);
+	      stmt = null;
+	   }
+	}
+	
+	@Override
+	public void detach(DetachEvent event) {
+	   if (null != stmt) {
+	      try {
+	         stmt.getConnection().close();
+	      } catch (final SQLException ex) {
+	         log.error("Unable to disconnect from database:", ex);
+	      }
+	      stmt = null;
+	   }
+	}
+
+   void conditionallyActivateInsertButton() {
+      final boolean isValid = 
+            0 < nameField.getValue().trim().length() &&
+            0 < emailField.getValue().trim().length() &&
+            emailField.isValid();
+      
+      insertButton.setEnabled(isValid);
+   }
+	
+	@Override
+	protected void init(final VaadinRequest vaadinRequest) {
+	   
+		final GridLayout layout = new GridLayout(2, 3);
+		layout.setMargin(true);
+		setContent(layout);
+
+		
+      if (null == stmt) { // Database access failed? No hope ...
+         layout.addComponent(new Label("Unable to connect to database server, see log for details"), 0, 0);
+         return;
+      }
+      // Assembling GUI components
+		layout.addComponent(new Label("Name:"), 0, 0);
+		layout.addComponent(nameField, 1, 0);
+
+		layout.addComponent(new Label("Email:"), 0, 1);
+		layout.addComponent(emailField, 1, 1);
+
+		layout.addComponent(insertButton, 1, 2);
+		
+		// Inserting requires valid user input.
+		insertButton.setEnabled(false);
+
+		// Caveat: Vaadin's validator will refuse e.g. "domainregistry@de"
+		// and may generally be non-RFC compliant.
+	   emailField.addValidator(new EmailValidator("Not a valid email"));
+		
+		// Check for global user input validity 
+		nameField.addValueChangeListener(event -> conditionallyActivateInsertButton());
+		emailField.addValueChangeListener(event -> conditionallyActivateInsertButton());
+				
+		insertButton.addClickListener(event -> {
+		   final String sql = "INSERT INTO Person VALUES('" + nameField.getValue() + "', '" 
+               + emailField.getValue() +  "')";
+         try {
+            final int updateCount = stmt.executeUpdate(sql);
+            emailField.clear();
+            nameField.clear();
+            Notification.show("Successfully executed \n'" + sql + "'\ninserting "
+                  + updateCount + " dataset");
+
+         } catch (final MySQLIntegrityConstraintViolationException ex) {// Duplicate email?
+            Notification.show("E-Mail already in database", Notification.Type.ERROR_MESSAGE);
+         }	catch(final SQLException ex) {// Other SQL problems
+            Notification.show("Failed to insert record, see log for details", Notification.Type.ERROR_MESSAGE);
+            log.error("JDBC exception on data insert:", ex);
+         }
+		});
+	}
+
+	@WebServlet(urlPatterns = "/*", name = "LoginUIServlet", asyncSupported = true)
+	@VaadinServletConfiguration(ui = LoginUI.class, productionMode = false)
+	public static class LoginUIServlet extends VaadinServlet {
+		private static final long serialVersionUID = -8657597788907698974L;
+	}
+}
diff --git a/P/Sda1/InsertGui/V4/src/main/resources/de/hdm_stuttgart/mi/MyAppWidgetset.gwt.xml b/P/Sda1/InsertGui/V4/src/main/resources/de/hdm_stuttgart/mi/MyAppWidgetset.gwt.xml
new file mode 100644
index 000000000..763aa41e8
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/src/main/resources/de/hdm_stuttgart/mi/MyAppWidgetset.gwt.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.5.1//EN"
+        "http://google-web-toolkit.googlecode.com/svn/tags/2.5.1/distro-source/core/src/gwt-module.dtd">
+<module>
+    <inherits name="com.vaadin.DefaultWidgetSet"/>
+</module>
diff --git a/P/Sda1/InsertGui/V4/src/main/resources/log4j2.xml b/P/Sda1/InsertGui/V4/src/main/resources/log4j2.xml
new file mode 100644
index 000000000..436cd31a9
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/src/main/resources/log4j2.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration>
+    
+    <Appenders>
+        
+        <File name="A1" fileName="A1.log" append="false">
+            <PatternLayout pattern="%t %-5p %c{2} - %m%n"/>
+        </File>
+        <Console name="STDOUT" target="SYSTEM_OUT">
+            <PatternLayout pattern="%C{2} (%F:%L) - %m%n"/>
+        </Console>
+    </Appenders>
+    <Loggers>
+
+        <!-- You my want to define class or package level per-logger rules -->
+        <Logger name="de.hdm_stuttgart.mi.sda1.xmlstatistics.App" level="info">
+            <AppenderRef ref="STDOUT"/>
+        </Logger>
+        <Root level="info">
+            <AppenderRef ref="STDOUT"/>
+            <AppenderRef ref="A1"/>
+        </Root>
+    </Loggers>
+</Configuration>
\ No newline at end of file
diff --git a/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/addons.scss b/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/addons.scss
new file mode 100644
index 000000000..a5670b70c
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/addons.scss
@@ -0,0 +1,7 @@
+/* This file is automatically managed and will be overwritten from time to time. */
+/* Do not manually edit this file. */
+
+/* Import and include this mixin into your project theme to include the addon themes */
+@mixin addons {
+}
+
diff --git a/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/favicon.ico b/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/favicon.ico
new file mode 100644
index 0000000000000000000000000000000000000000..ffb34a65c73eb1b3d59dcbb8f18ec78a8b0fc767
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literal 0
HcmV?d00001

diff --git a/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/mytheme.scss b/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/mytheme.scss
new file mode 100644
index 000000000..c6aa865f2
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/mytheme.scss
@@ -0,0 +1,36 @@
+// Global variable overrides. Must be declared before importing Valo.
+
+// Defines the plaintext font size, weight and family. Font size affects general component sizing.
+//$v-font-size: 16px;
+//$v-font-weight: 300;
+//$v-font-family: "Open Sans", sans-serif;
+
+// Defines the border used by all components.
+//$v-border: 1px solid (v-shade 0.7);
+//$v-border-radius: 4px;
+
+// Affects the color of some component elements, e.g Button, Panel title, etc
+//$v-background-color: hsl(210, 0%, 98%);
+// Affects the color of content areas, e.g  Panel and Window content, TextField input etc
+//$v-app-background-color: $v-background-color;
+
+// Affects the visual appearance of all components
+//$v-gradient: v-linear 8%;
+//$v-bevel-depth: 30%;
+//$v-shadow-opacity: 5%;
+
+// Defines colors for indicating status (focus, success, failure)
+//$v-focus-color: valo-focus-color(); // Calculates a suitable color automatically
+//$v-friendly-color: #2c9720;
+//$v-error-indicator-color: #ed473b;
+
+// For more information, see: https://vaadin.com/book/-/page/themes.valo.html
+// Example variants can be copy/pasted from https://vaadin.com/wiki/-/wiki/Main/Valo+Examples
+
+@import "../valo/valo.scss";
+
+@mixin mytheme {
+  @include valo;
+
+  // Insert your own theme rules here
+}
diff --git a/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/styles.scss b/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/styles.scss
new file mode 100644
index 000000000..bba1d493c
--- /dev/null
+++ b/P/Sda1/InsertGui/V4/src/main/webapp/VAADIN/themes/mytheme/styles.scss
@@ -0,0 +1,11 @@
+@import "mytheme.scss";
+@import "addons.scss";
+
+// This file prefixes all rules with the theme name to avoid causing conflicts with other themes.
+// The actual styles should be defined in mytheme.scss
+
+.mytheme {
+  @include addons;
+  @include mytheme;
+
+}
diff --git a/P/pom.xml b/P/pom.xml
index 5c2bdc652..2f8402e93 100644
--- a/P/pom.xml
+++ b/P/pom.xml
@@ -115,6 +115,9 @@
     <module>Sda1/catalog2rdbms</module>
     <module>Sda1/catalog2rdbmsPrepare</module>
 
+    <module>Sda1/InsertGui/V2</module>
+    <module>Sda1/InsertGui/V4</module>
+
     <module>Sda1/Jpa/HibernateStandalone</module>
 
     <module>Sda1/NoCast</module>
-- 
GitLab