diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..153c933
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,29 @@
+HELP.md
+/target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+/build/
+
+### VS Code ###
+.vscode/
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..3c7a6ee
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,18 @@
+FROM maven:3.6-jdk-8-alpine as builder
+WORKDIR /app
+
+#Cache dependencies
+COPY pom.xml .
+RUN mvn -B dependency:go-offline
+
+COPY src src
+RUN mvn -B clean package -DskipTests=true
+RUN mkdir -p target/dependency && (cd target/dependency; jar -xf ../*.jar)
+
+FROM openjdk:8-jre-alpine
+ENV JAVA_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap"
+ARG DEPENDENCY=/app/target/dependency
+COPY --from=builder ${DEPENDENCY}/BOOT-INF/lib /app/lib
+COPY --from=builder ${DEPENDENCY}/META-INF /app/META-INF
+COPY --from=builder ${DEPENDENCY}/BOOT-INF/classes /app
+ENTRYPOINT ["java","-cp","app:app/lib/*","-Djava.security.egd=file:/dev/./urandom","io.github.ust.mico.msgvalidator.MsgValidatorApplication"]
diff --git a/README.md b/README.md
index 4183a08..a15e475 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,6 @@
-# premium-loyalty-service
\ No newline at end of file
+# Premium Loyalty Service
+Provides an example component which reads messages from a Kafka topic and provides them via HTTP for user inspection
+
+# Webview
+
+Provides a message view at http://localhost:8090/messageViewer.html
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..30620a3
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,29 @@
+version: '2'
+services:
+ zookeeper:
+ image: wurstmeister/zookeeper
+ container_name: zookeeper
+ ports:
+ - "2181"
+ kafka:
+ image: wurstmeister/kafka
+ container_name: kafka
+ depends_on:
+ - zookeeper
+ ports:
+ - "9092:9092"
+ environment:
+ HOSTNAME_COMMAND: "curl -s ifconfig.co"
+ #KAFKA_ADVERTISED_HOST_NAME: host.docker.internal
+ KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
+ volumes:
+ - /var/run/docker.sock:/var/run/docker.sock
+ msg-validator:
+ build: .
+ container_name: msg-validator
+ depends_on:
+ - kafka
+ ports:
+ - "8090:8090"
+ environment:
+ kafka.bootstrapServers: kafka:9092
diff --git a/mvnw b/mvnw
new file mode 100644
index 0000000..8b9da3b
--- /dev/null
+++ b/mvnw
@@ -0,0 +1,286 @@
+#!/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.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven2 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 /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 "$JAVA_HOME"; pwd)`"
+ # TODO classpath?
+fi
+
+if [ -z "$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="`which 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
+ jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar"
+ 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 command -v wget > /dev/null; then
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Found wget ... using wget"
+ fi
+ wget "$jarUrl" -O "$wrapperJarPath"
+ elif command -v curl > /dev/null; then
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Found curl ... using curl"
+ fi
+ curl -o "$wrapperJarPath" "$jarUrl"
+ else
+ if [ "$MVNW_VERBOSE" = true ]; then
+ echo "Falling back to using Java to download"
+ fi
+ javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+ 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 "$MAVEN_PROJECTBASEDIR"`
+fi
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+ $MAVEN_OPTS \
+ -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+ "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+ ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/mvnw.cmd b/mvnw.cmd
new file mode 100644
index 0000000..fef5a8f
--- /dev/null
+++ b/mvnw.cmd
@@ -0,0 +1,161 @@
+@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 Maven2 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 key stroke 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 my 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 "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\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/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar"
+FOR /F "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% (
+ echo Found %WRAPPER_JAR%
+) else (
+ echo Couldn't find %WRAPPER_JAR%, downloading it ...
+ echo Downloading from: %DOWNLOAD_URL%
+ powershell -Command "(New-Object Net.WebClient).DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"
+ echo Finished downloading %WRAPPER_JAR%
+)
+@REM End of extension
+
+%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 "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\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%
+
+exit /B %ERROR_CODE%
diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..604642a
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,85 @@
+
+
+ 4.0.0
+
+ org.springframework.boot
+ spring-boot-starter-parent
+ 2.1.5.RELEASE
+
+
+ io.github.ust-mico
+ msg-validator
+ 0.0.1-SNAPSHOT
+ msg-validator
+ Receives messages from Kafka and displays them to the user
+
+
+ 1.8
+
+
+
+
+ org.springframework.boot
+ spring-boot-starter-web
+
+
+ org.springframework.kafka
+ spring-kafka
+
+
+
+ org.springframework.boot
+ spring-boot-starter-websocket
+
+
+
+ org.projectlombok
+ lombok
+ true
+
+
+ org.springframework.boot
+ spring-boot-starter-actuator
+
+
+ org.springframework.boot
+ spring-boot-starter-test
+ test
+
+
+ org.springframework.kafka
+ spring-kafka-test
+ test
+
+
+ io.cloudevents
+ cloudevents-api
+ 0.2.1
+
+
+ org.webjars
+ webjars-locator-core
+
+
+ org.webjars
+ sockjs-client
+ 1.1.2
+
+
+ org.webjars
+ stomp-websocket
+ 2.3.3-1
+
+
+
+
+
+
+ org.springframework.boot
+ spring-boot-maven-plugin
+
+
+
+
+
diff --git a/src/main/java/io/github/ust/mico/msgvalidator/MessageListener.java b/src/main/java/io/github/ust/mico/msgvalidator/MessageListener.java
new file mode 100644
index 0000000..d314654
--- /dev/null
+++ b/src/main/java/io/github/ust/mico/msgvalidator/MessageListener.java
@@ -0,0 +1,30 @@
+package io.github.ust.mico.msgvalidator;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.kafka.annotation.KafkaListener;
+import org.springframework.messaging.simp.SimpMessagingTemplate;
+import org.springframework.stereotype.Component;
+@Slf4j
+@Component
+public class MessageListener {
+
+
+ /**
+ * Used for messaging via stomp and websockets
+ */
+ @Autowired
+ SimpMessagingTemplate websocketsTemplate;
+
+ /**
+ * Entry point for incoming messages from kafka.
+ *
+ * @param message
+ */
+ @KafkaListener(topics = "${kafka.input-topic}", groupId = "${kafka.group-id}")
+ public void receive(String message) {
+ log.debug("Received CloudEvent message: {}", message);
+ websocketsTemplate.convertAndSend("/topic/messaging-bridge", message);
+ }
+
+}
diff --git a/src/main/java/io/github/ust/mico/msgvalidator/MsgValidatorApplication.java b/src/main/java/io/github/ust/mico/msgvalidator/MsgValidatorApplication.java
new file mode 100644
index 0000000..bc40749
--- /dev/null
+++ b/src/main/java/io/github/ust/mico/msgvalidator/MsgValidatorApplication.java
@@ -0,0 +1,16 @@
+package io.github.ust.mico.msgvalidator;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.client.RestTemplate;
+
+@SpringBootApplication
+public class MsgValidatorApplication {
+
+ public static void main(String[] args) {
+ SpringApplication.run(MsgValidatorApplication.class, args);
+ }
+
+}
diff --git a/src/main/java/io/github/ust/mico/msgvalidator/configuration/KafkaConfig.java b/src/main/java/io/github/ust/mico/msgvalidator/configuration/KafkaConfig.java
new file mode 100644
index 0000000..e08dbf5
--- /dev/null
+++ b/src/main/java/io/github/ust/mico/msgvalidator/configuration/KafkaConfig.java
@@ -0,0 +1,37 @@
+package io.github.ust.mico.msgvalidator.configuration;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+import javax.validation.constraints.NotBlank;
+
+/**
+ * Configuration of the kafka connection.
+ */
+@Component
+@Setter
+@Getter
+@ConfigurationProperties("kafka")
+public class KafkaConfig {
+
+ /**
+ * The URL of the Kafka bootstrap server.
+ */
+ @NotBlank
+ private String bootstrapServer;
+
+ /**
+ * The Kafka input topic.
+ */
+ @NotBlank
+ private String inputTopic;
+
+ /**
+ * The group id is a string that uniquely identifies the group
+ * of consumer processes to which this consumer belongs.
+ */
+ @NotBlank
+ private String groupId;
+}
diff --git a/src/main/java/io/github/ust/mico/msgvalidator/configuration/WebSocketConfig.java b/src/main/java/io/github/ust/mico/msgvalidator/configuration/WebSocketConfig.java
new file mode 100644
index 0000000..3916371
--- /dev/null
+++ b/src/main/java/io/github/ust/mico/msgvalidator/configuration/WebSocketConfig.java
@@ -0,0 +1,24 @@
+package io.github.ust.mico.msgvalidator.configuration;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.messaging.simp.config.MessageBrokerRegistry;
+import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
+import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
+import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;
+
+@Configuration
+@EnableWebSocketMessageBroker
+public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
+
+ @Override
+
+ public void registerStompEndpoints(StompEndpointRegistry registry) {
+ registry.addEndpoint("/messaging-bridge").withSockJS();
+ }
+
+ @Override
+
+ public void configureMessageBroker(MessageBrokerRegistry registry) {
+ registry.enableSimpleBroker("/topic");
+ }
+}
diff --git a/src/main/java/io/github/ust/mico/msgvalidator/kafka/KafkaConsumerConfig.java b/src/main/java/io/github/ust/mico/msgvalidator/kafka/KafkaConsumerConfig.java
new file mode 100644
index 0000000..fcdc821
--- /dev/null
+++ b/src/main/java/io/github/ust/mico/msgvalidator/kafka/KafkaConsumerConfig.java
@@ -0,0 +1,76 @@
+package io.github.ust.mico.msgvalidator.kafka;
+
+import io.github.ust.mico.msgvalidator.MessageListener;
+import io.github.ust.mico.msgvalidator.configuration.KafkaConfig;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.common.serialization.StringDeserializer;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.kafka.annotation.EnableKafka;
+import org.springframework.kafka.config.ConcurrentKafkaListenerContainerFactory;
+import org.springframework.kafka.config.KafkaListenerContainerFactory;
+import org.springframework.kafka.core.ConsumerFactory;
+import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.listener.ConcurrentMessageListenerContainer;
+import org.springframework.kafka.listener.SeekToCurrentErrorHandler;
+import org.springframework.kafka.support.serializer.ErrorHandlingDeserializer2;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@EnableKafka
+@Configuration
+@Slf4j
+public class KafkaConsumerConfig {
+
+ @Value("${kafka.bootstrap-servers}")
+ private String bootstrapServers;
+
+ @Value("${kafka.group-id}")
+ private String groupId;
+
+ @Bean
+ public Map consumerConfigs() {
+ log.info("Using '{}' as bootstrap server", bootstrapServers);
+ Map properties = new HashMap<>();
+ properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
+ bootstrapServers);
+ properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,
+ ErrorHandlingDeserializer2.class);
+ properties.put(ErrorHandlingDeserializer2.KEY_DESERIALIZER_CLASS,
+ StringDeserializer.class);
+ //https://docs.spring.io/spring-kafka/docs/2.2.0.RELEASE/reference/html/_reference.html#error-handling-deserializer
+ properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,
+ ErrorHandlingDeserializer2.class);
+ properties.put(ErrorHandlingDeserializer2.VALUE_DESERIALIZER_CLASS,
+ StringDeserializer.class);
+ properties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "latest");
+ properties.put(ConsumerConfig.GROUP_ID_CONFIG, groupId);
+
+ return properties;
+ }
+
+ @Bean
+ public ConsumerFactory consumerFactory() {
+ return new DefaultKafkaConsumerFactory<>(consumerConfigs());
+ }
+
+ @Bean
+ public KafkaListenerContainerFactory> kafkaListenerContainerFactory() {
+ ConcurrentKafkaListenerContainerFactory factory =
+ new ConcurrentKafkaListenerContainerFactory<>();
+ factory.setConsumerFactory(consumerFactory());
+ factory.setErrorHandler(new SeekToCurrentErrorHandler(1));
+ //TODO Add DeadLetterPublishingRecoverer later
+ return factory;
+ }
+
+ @Bean
+ public MessageListener receiver() {
+ return new MessageListener();
+ }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
new file mode 100644
index 0000000..b0a16ca
--- /dev/null
+++ b/src/main/resources/application.properties
@@ -0,0 +1,10 @@
+# Application
+spring.application.name=msg-validator
+server.port=8090
+
+# Actuator
+management.endpoints.web.exposure.include=configprops,env,health,info,loggers,metrics
+
+kafka.bootstrap-servers=${KAFKA_BOOTSTRAP_SERVERS:localhost:9092}
+kafka.group-id=${KAFKA_GROUP_ID:msg-validator}
+kafka.input-topic=${KAFKA_TOPIC_INPUT:inputTopic}
diff --git a/src/main/resources/public/messageViewer.html b/src/main/resources/public/messageViewer.html
new file mode 100644
index 0000000..950bfcd
--- /dev/null
+++ b/src/main/resources/public/messageViewer.html
@@ -0,0 +1,27 @@
+
+
+
+
+ Premium Loyalty Service
+
+
+
+
+
+Messages:
+
+
+
\ No newline at end of file