Migrates KafkaStreams branching sample (#2427)
* Migrate Kafka Streams branching sample * Cleanup some Kafka samples * copyright header added to several files * Spring Boot Maven plugin put into parent samples pom.xml * Removed unused dependency and fixed title in README.adoc
This commit is contained in:
Chris Bono
@@ -1,3 +1,19 @@
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/*
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* Copyright 2020-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.consumer;
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import java.util.function.Consumer;
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@@ -1,3 +1,19 @@
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/*
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* Copyright 2020-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.producer1;
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import java.util.Random;
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@@ -40,6 +56,3 @@ public class ConfluentAvroProducer1Application {
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return sensor;
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}
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}
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@@ -1,3 +1,19 @@
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/*
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* Copyright 2020-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.producer2;
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import java.util.Random;
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@@ -42,4 +58,3 @@ public class ConfluentAvroProducer2Application {
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return sensor;
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}
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}
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@@ -42,20 +42,6 @@
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</plugin>
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</plugins>
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</pluginManagement>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-deploy-plugin</artifactId>
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<configuration>
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<skip>true</skip>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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@@ -1,5 +1,5 @@
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/*
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* Copyright 2020 the original author or authors.
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* Copyright 2020-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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110
samples/kafka-streams-branching/README.adoc
Normal file
110
samples/kafka-streams-branching/README.adoc
Normal file
@@ -0,0 +1,110 @@
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== Spring Cloud Stream Kafka Streams with branching
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This sample demonstrates a Spring Cloud Stream processor using Kafka Streams branching support.
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=== Application
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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:
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In essence, the application receives text messages from an input topic, filters them by language (English, French, Spanish
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and ignoring the rest), and computes word occurrence counts in a configurable time window and finally report that in
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the corresponding output topics.
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It uses a single input topic and 3 output topics.
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[[build-app]]
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=== Building
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To build the app simply execute the following command:
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[source,bash]
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----
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./mvnw clean install
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----
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=== Running
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The sample is exercised via the provided link:./src/test/java/com/example/kafka/streams/branching/KafkaStreamsBranchingSampleTests.java[@SpringBootTest].
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However, it can also be run manually as follows:
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==== Ensure these pre-requisites
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****
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* The app has been built by following the <<build-app>> steps
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* Apache Kafka broker available at `localhost:9092`
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[[kafka-tools]]
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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
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****
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==== Start the streams app
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[source,bash]
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----
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java -jar target/kafka-streams-branching-4.0.0-SNAPSHOT.jar
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----
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===== Start output topic consumers
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Leverage the Kafka command line tool `kafka-console-consumer` to watch events on each output topic.
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Issue the following commands, each on a separate terminal:
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NOTE: The commands reference `broker1` and `broker1:29091` as they assume the aforementioned <<kafka-tools,Kafka Tools>> are used to create the cluster. If you start up your own cluster you will need to adjust the coordinates accordingly.
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NOTE: Also note that the port is `29091` as that is the internal port configured on the cluster (rather than the expected `9091`)
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[source,bash]
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----
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docker exec -it broker1 /bin/kafka-console-consumer --bootstrap-server broker1:29091 --topic english-counts
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----
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[source,bash]
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----
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docker exec -it broker1 /bin/kafka-console-consumer --bootstrap-server broker1:29091 --topic french-counts
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----
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[source,bash]
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----
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docker exec -it broker1 /bin/kafka-console-consumer --bootstrap-server broker1:29091 --topic spanish-counts
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----
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At this point each of the consumers is just waiting for events to be sent to the output topics.
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===== Send input messages
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Leverage the Kafka command line tool `kafka-console-producer` to send messges (words) to the input topic.
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Issue the following command on a separate terminal:
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[source,bash]
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----
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docker exec -it broker1 /bin/kafka-console-producer --broker-list broker1:29091 --topic words
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----
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Type one of the expected words and click "<Enter>". Repeat a few times. Something like the following:
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[source,bash]
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----
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>english
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>english
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>english
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>french
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>french
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>foo
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>spanish
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----
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===== View output messages
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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).
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The word "english" goes to topic english-counts, "french" goes to topic french-counts and "spanish" goes to spanish-counts. Something like the following:
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.english-counts
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[source,bash]
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----
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{"word":"english","count":1,"start":1654923396000,"end":1654923402000}
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{"word":"english","count":1,"start":1654923402000,"end":1654923408000}
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{"word":"english","count":1,"start":1654923422000,"end":1654923424000}
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----
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.french-counts
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[source,bash]
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----
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{"word":"french","count":1,"start":1654923396000,"end":1654923402000}
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{"word":"french","count":1,"start":1654923402000,"end":1654923408000}
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----
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.spanish-counts
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[source,bash]
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----
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{"word":"spanish","count":1,"start":1654923396000,"end":1654923402000}
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----
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310
samples/kafka-streams-branching/mvnw
vendored
Executable file
310
samples/kafka-streams-branching/mvnw
vendored
Executable file
@@ -0,0 +1,310 @@
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#!/bin/sh
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# ----------------------------------------------------------------------------
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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# ----------------------------------------------------------------------------
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# ----------------------------------------------------------------------------
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# Maven Start Up Batch script
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#
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# Required ENV vars:
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# ------------------
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# JAVA_HOME - location of a JDK home dir
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#
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# Optional ENV vars
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# -----------------
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# M2_HOME - location of maven2's installed home dir
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# MAVEN_OPTS - parameters passed to the Java VM when running Maven
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# e.g. to debug Maven itself, use
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# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
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# MAVEN_SKIP_RC - flag to disable loading of mavenrc files
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# ----------------------------------------------------------------------------
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if [ -z "$MAVEN_SKIP_RC" ] ; then
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if [ -f /etc/mavenrc ] ; then
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. /etc/mavenrc
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fi
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if [ -f "$HOME/.mavenrc" ] ; then
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. "$HOME/.mavenrc"
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fi
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fi
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# OS specific support. $var _must_ be set to either true or false.
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cygwin=false;
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darwin=false;
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mingw=false
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case "`uname`" in
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CYGWIN*) cygwin=true ;;
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MINGW*) mingw=true;;
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Darwin*) darwin=true
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# Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
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# See https://developer.apple.com/library/mac/qa/qa1170/_index.html
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if [ -z "$JAVA_HOME" ]; then
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if [ -x "/usr/libexec/java_home" ]; then
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export JAVA_HOME="`/usr/libexec/java_home`"
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else
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export JAVA_HOME="/Library/Java/Home"
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fi
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fi
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;;
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esac
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if [ -z "$JAVA_HOME" ] ; then
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if [ -r /etc/gentoo-release ] ; then
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JAVA_HOME=`java-config --jre-home`
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fi
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fi
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if [ -z "$M2_HOME" ] ; then
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## resolve links - $0 may be a link to maven's home
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PRG="$0"
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# need this for relative symlinks
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while [ -h "$PRG" ] ; do
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ls=`ls -ld "$PRG"`
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link=`expr "$ls" : '.*-> \(.*\)$'`
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if expr "$link" : '/.*' > /dev/null; then
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PRG="$link"
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else
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PRG="`dirname "$PRG"`/$link"
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fi
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done
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saveddir=`pwd`
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M2_HOME=`dirname "$PRG"`/..
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# make it fully qualified
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M2_HOME=`cd "$M2_HOME" && pwd`
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cd "$saveddir"
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# echo Using m2 at $M2_HOME
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fi
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# For Cygwin, ensure paths are in UNIX format before anything is touched
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if $cygwin ; then
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[ -n "$M2_HOME" ] &&
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M2_HOME=`cygpath --unix "$M2_HOME"`
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[ -n "$JAVA_HOME" ] &&
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JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
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[ -n "$CLASSPATH" ] &&
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CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
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fi
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# For Mingw, ensure paths are in UNIX format before anything is touched
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if $mingw ; then
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[ -n "$M2_HOME" ] &&
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M2_HOME="`(cd "$M2_HOME"; pwd)`"
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[ -n "$JAVA_HOME" ] &&
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JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
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fi
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if [ -z "$JAVA_HOME" ]; then
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javaExecutable="`which javac`"
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if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
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# readlink(1) is not available as standard on Solaris 10.
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readLink=`which readlink`
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if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
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if $darwin ; then
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javaHome="`dirname \"$javaExecutable\"`"
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javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
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else
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javaExecutable="`readlink -f \"$javaExecutable\"`"
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fi
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javaHome="`dirname \"$javaExecutable\"`"
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javaHome=`expr "$javaHome" : '\(.*\)/bin'`
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JAVA_HOME="$javaHome"
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export JAVA_HOME
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fi
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fi
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fi
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if [ -z "$JAVACMD" ] ; then
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if [ -n "$JAVA_HOME" ] ; then
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if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
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# IBM's JDK on AIX uses strange locations for the executables
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JAVACMD="$JAVA_HOME/jre/sh/java"
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else
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JAVACMD="$JAVA_HOME/bin/java"
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fi
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else
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JAVACMD="`which java`"
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fi
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fi
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if [ ! -x "$JAVACMD" ] ; then
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echo "Error: JAVA_HOME is not defined correctly." >&2
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echo " We cannot execute $JAVACMD" >&2
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exit 1
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||||
fi
|
||||
|
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if [ -z "$JAVA_HOME" ] ; then
|
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echo "Warning: JAVA_HOME environment variable is not set."
|
||||
fi
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CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
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# traverses directory structure from process work directory to filesystem root
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# first directory with .mvn subdirectory is considered project base directory
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find_maven_basedir() {
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if [ -z "$1" ]
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then
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echo "Path not specified to find_maven_basedir"
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return 1
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||||
fi
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basedir="$1"
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wdir="$1"
|
||||
while [ "$wdir" != '/' ] ; do
|
||||
if [ -d "$wdir"/.mvn ] ; then
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basedir=$wdir
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break
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||||
fi
|
||||
# workaround for JBEAP-8937 (on Solaris 10/Sparc)
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if [ -d "${wdir}" ]; then
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wdir=`cd "$wdir/.."; pwd`
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||||
fi
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||||
# end of workaround
|
||||
done
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||||
echo "${basedir}"
|
||||
}
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||||
|
||||
# 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 "$BASE_DIR" ]; then
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||||
exit 1;
|
||||
fi
|
||||
|
||||
##########################################################################################
|
||||
# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
|
||||
# This allows using the maven wrapper in projects that prohibit checking in binary data.
|
||||
##########################################################################################
|
||||
if [ -r "$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} $MAVEN_CONFIG "$@"
|
||||
182
samples/kafka-streams-branching/mvnw.cmd
vendored
Normal file
182
samples/kafka-streams-branching/mvnw.cmd
vendored
Normal file
@@ -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%
|
||||
37
samples/kafka-streams-branching/pom.xml
Normal file
37
samples/kafka-streams-branching/pom.xml
Normal file
@@ -0,0 +1,37 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
|
||||
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
<groupId>com.example</groupId>
|
||||
<artifactId>kafka-streams-branching</artifactId>
|
||||
<name>kafka-streams-branching</name>
|
||||
|
||||
<parent>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-stream-samples-parent</artifactId>
|
||||
<version>4.0.0-SNAPSHOT</version>
|
||||
</parent>
|
||||
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-starter-web</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-stream-binder-kafka-streams</artifactId>
|
||||
</dependency>
|
||||
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-starter-test</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.springframework.kafka</groupId>
|
||||
<artifactId>spring-kafka-test</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
|
||||
</project>
|
||||
@@ -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<Object, String>, KStream<?, WordCount>[]> process() {
|
||||
|
||||
Predicate<Object, WordCount> isEnglish = (k, v) -> v.word.equals("english");
|
||||
Predicate<Object, WordCount> isFrench = (k, v) -> v.word.equals("french");
|
||||
Predicate<Object, WordCount> 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;
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -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
|
||||
@@ -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<String, Object> senderProps = KafkaTestUtils.producerProps(embeddedKafka);
|
||||
DefaultKafkaProducerFactory<Integer, String> pf = new DefaultKafkaProducerFactory<>(senderProps);
|
||||
try {
|
||||
KafkaTemplate<Integer, String> 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<String, Object> consumerProps = KafkaTestUtils.consumerProps("wordEventsTest", "false", embeddedKafka);
|
||||
consumerProps.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
|
||||
DefaultKafkaConsumerFactory<String, String> cf = new DefaultKafkaConsumerFactory<>(consumerProps);
|
||||
try (Consumer<String, String> 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");
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -24,6 +24,7 @@
|
||||
<modules>
|
||||
<module>confluent-schema-registry-integration</module>
|
||||
<module>kafka-native-serialization</module>
|
||||
<module>kafka-streams-branching</module>
|
||||
<module>stream-bridge-avro</module>
|
||||
</modules>
|
||||
|
||||
@@ -48,6 +49,10 @@
|
||||
<skip>true</skip>
|
||||
</configuration>
|
||||
</plugin>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
|
||||
|
||||
@@ -67,10 +67,6 @@
|
||||
</execution>
|
||||
</executions>
|
||||
</plugin>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
|
||||
|
||||
@@ -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;
|
||||
|
||||
Reference in New Issue
Block a user