diff --git a/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-consumer/src/main/java/sample/consumer/ConfluentAvroConsumerApplication.java b/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-consumer/src/main/java/sample/consumer/ConfluentAvroConsumerApplication.java
index c727a96c9..8dc55bc21 100644
--- a/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-consumer/src/main/java/sample/consumer/ConfluentAvroConsumerApplication.java
+++ b/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-consumer/src/main/java/sample/consumer/ConfluentAvroConsumerApplication.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2020-2022 the original author or authors.
+ *
+ * Licensed 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.
+ */
+
package sample.consumer;
import java.util.function.Consumer;
diff --git a/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer1/src/main/java/sample/producer1/ConfluentAvroProducer1Application.java b/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer1/src/main/java/sample/producer1/ConfluentAvroProducer1Application.java
index 6dc0a6e16..59e45d03b 100644
--- a/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer1/src/main/java/sample/producer1/ConfluentAvroProducer1Application.java
+++ b/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer1/src/main/java/sample/producer1/ConfluentAvroProducer1Application.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2020-2022 the original author or authors.
+ *
+ * Licensed 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.
+ */
+
package sample.producer1;
import java.util.Random;
@@ -40,6 +56,3 @@ public class ConfluentAvroProducer1Application {
return sensor;
}
}
-
-
-
diff --git a/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer2/src/main/java/sample/producer2/ConfluentAvroProducer2Application.java b/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer2/src/main/java/sample/producer2/ConfluentAvroProducer2Application.java
index bbc19465f..1c3bd90c0 100644
--- a/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer2/src/main/java/sample/producer2/ConfluentAvroProducer2Application.java
+++ b/samples/confluent-schema-registry-integration/confluent-schema-registry-integration-producer2/src/main/java/sample/producer2/ConfluentAvroProducer2Application.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2020-2022 the original author or authors.
+ *
+ * Licensed 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.
+ */
+
package sample.producer2;
import java.util.Random;
@@ -42,4 +58,3 @@ public class ConfluentAvroProducer2Application {
return sensor;
}
}
-
diff --git a/samples/confluent-schema-registry-integration/pom.xml b/samples/confluent-schema-registry-integration/pom.xml
index 936c87b3f..d676915be 100644
--- a/samples/confluent-schema-registry-integration/pom.xml
+++ b/samples/confluent-schema-registry-integration/pom.xml
@@ -42,20 +42,6 @@
-
-
-
- org.apache.maven.plugins
- maven-deploy-plugin
-
- true
-
-
-
- org.springframework.boot
- spring-boot-maven-plugin
-
-
diff --git a/samples/kafka-native-serialization/src/test/java/com/example/kafkanativeserialization/MyJsonDeserializer.java b/samples/kafka-native-serialization/src/test/java/com/example/kafkanativeserialization/MyJsonDeserializer.java
index 2f434d1d2..b2532ebf3 100644
--- a/samples/kafka-native-serialization/src/test/java/com/example/kafkanativeserialization/MyJsonDeserializer.java
+++ b/samples/kafka-native-serialization/src/test/java/com/example/kafkanativeserialization/MyJsonDeserializer.java
@@ -1,5 +1,5 @@
/*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2022 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
diff --git a/samples/kafka-streams-branching/README.adoc b/samples/kafka-streams-branching/README.adoc
new file mode 100644
index 000000000..a6d4d903d
--- /dev/null
+++ b/samples/kafka-streams-branching/README.adoc
@@ -0,0 +1,110 @@
+== Spring Cloud Stream Kafka Streams with branching
+
+This sample demonstrates a Spring Cloud Stream processor using Kafka Streams branching support.
+
+=== Application
+The app is based on the word count application from the Confluent https://github.com/confluentinc/kafka-streams-examples/blob/5.3.0-post/src/main/java/io/confluent/examples/streams/WordCountLambdaExample.java[Kafka Streams examples] and does the following:
+
+In essence, the application receives text messages from an input topic, filters them by language (English, French, Spanish
+and ignoring the rest), and computes word occurrence counts in a configurable time window and finally report that in
+the corresponding output topics.
+
+It uses a single input topic and 3 output topics.
+
+[[build-app]]
+=== Building
+To build the app simply execute the following command:
+[source,bash]
+----
+./mvnw clean install
+----
+
+=== Running
+The sample is exercised via the provided link:./src/test/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSampleTests.java[@SpringBootTest].
+However, it can also be run manually as follows:
+
+==== Ensure these pre-requisites
+****
+* The app has been built by following the <> steps
+* Apache Kafka broker available at `localhost:9092`
+
+[[kafka-tools]]
+TIP: The included link:../../../tools/kafka/docker-compose/README.adoc#_all_the_things[Kafka tools] can be used to easily start a broker at the required coordinates
+****
+
+==== Start the streams app
+[source,bash]
+----
+java -jar target/kafka-streams-branching-4.0.0-SNAPSHOT.jar
+----
+
+===== Start output topic consumers
+Leverage the Kafka command line tool `kafka-console-consumer` to watch events on each output topic.
+
+Issue the following commands, each on a separate terminal:
+
+NOTE: The commands reference `broker1` and `broker1:29091` as they assume the aforementioned <> are used to create the cluster. If you start up your own cluster you will need to adjust the coordinates accordingly.
+
+NOTE: Also note that the port is `29091` as that is the internal port configured on the cluster (rather than the expected `9091`)
+[source,bash]
+----
+docker exec -it broker1 /bin/kafka-console-consumer --bootstrap-server broker1:29091 --topic english-counts
+----
+
+[source,bash]
+----
+docker exec -it broker1 /bin/kafka-console-consumer --bootstrap-server broker1:29091 --topic french-counts
+----
+
+[source,bash]
+----
+docker exec -it broker1 /bin/kafka-console-consumer --bootstrap-server broker1:29091 --topic spanish-counts
+----
+At this point each of the consumers is just waiting for events to be sent to the output topics.
+
+===== Send input messages
+Leverage the Kafka command line tool `kafka-console-producer` to send messges (words) to the input topic.
+
+Issue the following command on a separate terminal:
+
+[source,bash]
+----
+docker exec -it broker1 /bin/kafka-console-producer --broker-list broker1:29091 --topic words
+----
+
+Type one of the expected words and click "". Repeat a few times. Something like the following:
+
+[source,bash]
+----
+>english
+>english
+>english
+>french
+>french
+>foo
+>spanish
+----
+
+===== View output messages
+As you enter words in the console producer (input into Kafka streams processor) the corresponding console consumer will log the processed word count event (output from the Kafka Streams processor).
+
+The word "english" goes to topic english-counts, "french" goes to topic french-counts and "spanish" goes to spanish-counts. Something like the following:
+
+.english-counts
+[source,bash]
+----
+{"word":"english","count":1,"start":1654923396000,"end":1654923402000}
+{"word":"english","count":1,"start":1654923402000,"end":1654923408000}
+{"word":"english","count":1,"start":1654923422000,"end":1654923424000}
+----
+.french-counts
+[source,bash]
+----
+{"word":"french","count":1,"start":1654923396000,"end":1654923402000}
+{"word":"french","count":1,"start":1654923402000,"end":1654923408000}
+----
+.spanish-counts
+[source,bash]
+----
+{"word":"spanish","count":1,"start":1654923396000,"end":1654923402000}
+----
diff --git a/samples/kafka-streams-branching/mvnw b/samples/kafka-streams-branching/mvnw
new file mode 100755
index 000000000..a16b5431b
--- /dev/null
+++ b/samples/kafka-streams-branching/mvnw
@@ -0,0 +1,310 @@
+#!/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 "$MAVEN_SKIP_RC" ] ; then
+
+ if [ -f /etc/mavenrc ] ; then
+ . /etc/mavenrc
+ fi
+
+ if [ -f "$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="`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
+ if [ -n "$MVNW_REPOURL" ]; then
+ jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+ else
+ jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.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 "$wrapperJarPath"
+ else
+ wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+ fi
+ elif command -v curl > /dev/null; then
+ if [ "$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" \
+ $MAVEN_OPTS \
+ -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+ "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+ ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/samples/kafka-streams-branching/mvnw.cmd b/samples/kafka-streams-branching/mvnw.cmd
new file mode 100644
index 000000000..c8d43372c
--- /dev/null
+++ b/samples/kafka-streams-branching/mvnw.cmd
@@ -0,0 +1,182 @@
+@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 "%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/0.5.6/maven-wrapper-0.5.6.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% (
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Found %WRAPPER_JAR%
+ )
+) else (
+ if not "%MVNW_REPOURL%" == "" (
+ SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.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 "%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/samples/kafka-streams-branching/pom.xml b/samples/kafka-streams-branching/pom.xml
new file mode 100644
index 000000000..d9e72acab
--- /dev/null
+++ b/samples/kafka-streams-branching/pom.xml
@@ -0,0 +1,37 @@
+
+
+ 4.0.0
+ com.example
+ kafka-streams-branching
+ kafka-streams-branching
+
+
+ org.springframework.cloud
+ spring-cloud-stream-samples-parent
+ 4.0.0-SNAPSHOT
+
+
+
+
+ org.springframework.boot
+ spring-boot-starter-web
+
+
+ org.springframework.cloud
+ spring-cloud-stream-binder-kafka-streams
+
+
+
+ org.springframework.boot
+ spring-boot-starter-test
+ test
+
+
+ org.springframework.kafka
+ spring-kafka-test
+ test
+
+
+
+
diff --git a/samples/kafka-streams-branching/src/main/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSample.java b/samples/kafka-streams-branching/src/main/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSample.java
new file mode 100644
index 000000000..26928528d
--- /dev/null
+++ b/samples/kafka-streams-branching/src/main/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSample.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2020-2022 the original author or authors.
+ *
+ * Licensed 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.
+ */
+
+package com.example.kafka.streams.branching;
+
+import java.time.Duration;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.function.Function;
+
+import org.apache.kafka.streams.KeyValue;
+import org.apache.kafka.streams.kstream.KStream;
+import org.apache.kafka.streams.kstream.Materialized;
+import org.apache.kafka.streams.kstream.Predicate;
+import org.apache.kafka.streams.kstream.TimeWindows;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+@SpringBootApplication(proxyBeanMethods = false)
+class KafkaStreamsBranchingSample {
+
+ public static void main(String[] args) {
+ SpringApplication.run(KafkaStreamsBranchingSample.class, args);
+ }
+
+ public static class WordCountProcessorApplication {
+
+ @Bean
+ @SuppressWarnings("unchecked")
+ public Function, KStream[]> process() {
+
+ Predicate isEnglish = (k, v) -> v.word.equals("english");
+ Predicate isFrench = (k, v) -> v.word.equals("french");
+ Predicate isSpanish = (k, v) -> v.word.equals("spanish");
+
+ return input -> input
+ .flatMapValues(value -> Arrays.asList(value.toLowerCase().split("\\W+")))
+ .groupBy((key, value) -> value)
+ .windowedBy(TimeWindows.of(Duration.ofSeconds(6)))
+ .count(Materialized.as("WordCounts-1"))
+ .toStream()
+ .map((key, value) -> new KeyValue<>(null,
+ new WordCount(key.key(), value, new Date(key.window().start()), new Date(key.window().end()))))
+ .split()
+ .branch(isEnglish)
+ .branch(isFrench)
+ .branch(isSpanish)
+ .noDefaultBranch()
+ .values().toArray(new KStream[0]);
+ }
+ }
+
+ static class WordCount {
+
+ private String word;
+
+ private long count;
+
+ private Date start;
+
+ private Date end;
+
+ WordCount(String word, long count, Date start, Date end) {
+ this.word = word;
+ this.count = count;
+ this.start = start;
+ this.end = end;
+ }
+
+ public String getWord() {
+ return word;
+ }
+
+ public void setWord(String word) {
+ this.word = word;
+ }
+
+ public long getCount() {
+ return count;
+ }
+
+ public void setCount(long count) {
+ this.count = count;
+ }
+
+ public Date getStart() {
+ return start;
+ }
+
+ public void setStart(Date start) {
+ this.start = start;
+ }
+
+ public Date getEnd() {
+ return end;
+ }
+
+ public void setEnd(Date end) {
+ this.end = end;
+ }
+ }
+}
diff --git a/samples/kafka-streams-branching/src/main/resources/application.yml b/samples/kafka-streams-branching/src/main/resources/application.yml
new file mode 100644
index 000000000..19b9229ee
--- /dev/null
+++ b/samples/kafka-streams-branching/src/main/resources/application.yml
@@ -0,0 +1,18 @@
+spring:
+ application.name: kafka-streams-branching-sample
+ cloud:
+ stream:
+ kafka.streams.binder:
+ configuration:
+ commit.interval.ms: 1000
+ default.key.serde: org.apache.kafka.common.serialization.Serdes$StringSerde
+ default.value.serde: org.apache.kafka.common.serialization.Serdes$StringSerde
+ bindings:
+ process-in-0:
+ destination: words
+ process-out-0:
+ destination: english-counts
+ process-out-1:
+ destination: french-counts
+ process-out-2:
+ destination: spanish-counts
diff --git a/samples/kafka-streams-branching/src/test/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSampleTests.java b/samples/kafka-streams-branching/src/test/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSampleTests.java
new file mode 100644
index 000000000..106a7a329
--- /dev/null
+++ b/samples/kafka-streams-branching/src/test/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSampleTests.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2018 the original author or authors.
+ *
+ * Licensed 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.
+ */
+
+package com.example.kafka.streams.branching;
+
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.kafka.clients.consumer.Consumer;
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.assertj.core.api.InstanceOfAssertFactories;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.kafka.config.StreamsBuilderFactoryBean;
+import org.springframework.kafka.core.DefaultKafkaConsumerFactory;
+import org.springframework.kafka.core.DefaultKafkaProducerFactory;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.test.EmbeddedKafkaBroker;
+import org.springframework.kafka.test.context.EmbeddedKafka;
+import org.springframework.kafka.test.utils.KafkaTestUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)
+@EmbeddedKafka(
+ topics = { "words", "english-counts", "french-counts", "spanish-counts" },
+ bootstrapServersProperty = "spring.cloud.stream.kafka.streams.binder.brokers",
+ controlledShutdown = true)
+class KafkaStreamsBranchingSampleTests {
+
+ @BeforeEach
+ void setKafkaStreamsCloseTimeout(@Autowired StreamsBuilderFactoryBean streamsBuilderFactoryBean) {
+ streamsBuilderFactoryBean.setCloseTimeout(0);
+ }
+
+ @Test
+ void wordEventsDirectedToProperTopic(@Autowired EmbeddedKafkaBroker embeddedKafka) throws InterruptedException {
+ Map senderProps = KafkaTestUtils.producerProps(embeddedKafka);
+ DefaultKafkaProducerFactory pf = new DefaultKafkaProducerFactory<>(senderProps);
+ try {
+ KafkaTemplate template = new KafkaTemplate<>(pf, true);
+ template.setDefaultTopic("words");
+ template.sendDefault("english");
+ template.sendDefault("french");
+ template.sendDefault("spanish");
+ }
+ finally {
+ pf.destroy();
+ }
+
+ TimeUnit.SECONDS.sleep(2);
+
+ Map consumerProps = KafkaTestUtils.consumerProps("wordEventsTest", "false", embeddedKafka);
+ consumerProps.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
+ DefaultKafkaConsumerFactory cf = new DefaultKafkaConsumerFactory<>(consumerProps);
+ try (Consumer consumer = cf.createConsumer()) {
+ embeddedKafka.consumeFromEmbeddedTopics(consumer, "english-counts", "french-counts", "spanish-counts");
+ assertThat(KafkaTestUtils.getSingleRecord(consumer, "english-counts", 5000L))
+ .extracting(ConsumerRecord::value)
+ .asInstanceOf(InstanceOfAssertFactories.STRING)
+ .contains("english");
+ assertThat(KafkaTestUtils.getSingleRecord(consumer, "french-counts", 5000L))
+ .extracting(ConsumerRecord::value)
+ .asInstanceOf(InstanceOfAssertFactories.STRING)
+ .contains("french");
+ assertThat(KafkaTestUtils.getSingleRecord(consumer, "spanish-counts", 5000L))
+ .extracting(ConsumerRecord::value)
+ .asInstanceOf(InstanceOfAssertFactories.STRING)
+ .contains("spanish");
+ }
+ }
+}
diff --git a/samples/pom.xml b/samples/pom.xml
index 98e39b510..4552c1a41 100644
--- a/samples/pom.xml
+++ b/samples/pom.xml
@@ -24,6 +24,7 @@
confluent-schema-registry-integration
kafka-native-serialization
+ kafka-streams-branching
stream-bridge-avro
@@ -48,6 +49,10 @@
true
+
+ org.springframework.boot
+ spring-boot-maven-plugin
+
diff --git a/samples/stream-bridge-avro/pom.xml b/samples/stream-bridge-avro/pom.xml
index 7467d5dd0..5daa676d4 100644
--- a/samples/stream-bridge-avro/pom.xml
+++ b/samples/stream-bridge-avro/pom.xml
@@ -67,10 +67,6 @@
-
- org.springframework.boot
- spring-boot-maven-plugin
-
diff --git a/samples/stream-bridge-avro/src/main/java/com/example/stream/bridge/avro/StreamBridgeAvroApplication.java b/samples/stream-bridge-avro/src/main/java/com/example/stream/bridge/avro/StreamBridgeAvroApplication.java
index 121cb5429..532279a88 100644
--- a/samples/stream-bridge-avro/src/main/java/com/example/stream/bridge/avro/StreamBridgeAvroApplication.java
+++ b/samples/stream-bridge-avro/src/main/java/com/example/stream/bridge/avro/StreamBridgeAvroApplication.java
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2020-2022 the original author or authors.
+ *
+ * Licensed 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.
+ */
+
package com.example.stream.bridge.avro;
import java.util.Random;