Add sample for multiple input/output channels in an app
- This resolves #12
This commit is contained in:
Ilayaperumal Gopinathan
40
multi-io/README.md
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40
multi-io/README.md
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Spring Cloud Stream Stream Listener Sample
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=============================
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In this *Spring Cloud Stream* sample, the application shows how to use configure multiple input/output channels inside
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a single application.
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## Requirements
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To run this sample, you will need to have installed:
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* Java 8 or Above
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This example requires Redis to be running on localhost.
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## Code Tour
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This sample is a Spring Boot application that bundles multiple application together to showcase how to configure
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multiple input/output channels.
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* MultipleIOChannelsApplication - the Spring Boot Main Application
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* SampleSource - the app that configures two output channels (output1 and output2).
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* SampleSink - the app that configures two input channels (input1 and input2).
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The channels output1 and input1 connect to the same destination (test1) on the broker (Redis) and the channels output2 and
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input2 connect to the same destination (test2) on redis.
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For demo purpose, the apps `SampleSource` and `SampleSink` are bundled together. In practice they are separate applications
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unless bundled together by the `AggregateApplicationBuilder`.
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## Building with Maven
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Build the sample by executing:
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>$ mvn clean package
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## Running the Sample
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To start the source module execute the following:
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>$ java -jar target/spring-cloud-stream-sample-multi-io-1.0.0.BUILD-SNAPSHOT-exec.jar
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59
multi-io/pom.xml
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59
multi-io/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>spring-cloud-stream-sample-multi-io</artifactId>
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<packaging>jar</packaging>
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<name>spring-cloud-stream-sample-multi-io</name>
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<description>Demo project for multiple input/output channels binding</description>
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<parent>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-stream-samples</artifactId>
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<version>1.0.0.BUILD-SNAPSHOT</version>
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</parent>
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<properties>
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<start-class>demo.MultipleIOChannelsApplication</start-class>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-stream</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.cloud</groupId>
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<artifactId>spring-cloud-stream-binder-redis</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-redis</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-configuration-processor</artifactId>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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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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<configuration>
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<classifier>exec</classifier>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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/*
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* Copyright 2015 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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* http://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 demo;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class MultipleIOChannelsApplication {
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public static void main(String[] args) {
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SpringApplication.run(MultipleIOChannelsApplication.class, args);
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}
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}
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57
multi-io/src/main/java/demo/SampleSink.java
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57
multi-io/src/main/java/demo/SampleSink.java
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/*
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* Copyright 2015 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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* http://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 demo;
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import org.springframework.cloud.stream.annotation.EnableBinding;
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import org.springframework.cloud.stream.annotation.Input;
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import org.springframework.cloud.stream.annotation.StreamListener;
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import org.springframework.messaging.SubscribableChannel;
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/**
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* @author Ilayaperumal Gopinathan
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*/
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@EnableBinding(SampleSink.MultiInputSink.class)
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public class SampleSink {
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@StreamListener(MultiInputSink.INPUT1)
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public synchronized void receive1(String message) {
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System.out.println("******************");
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System.out.println("At Sink1");
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System.out.println("******************");
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System.out.println("Received message " + message);
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}
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@StreamListener(MultiInputSink.INPUT2)
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public synchronized void receive2(String message) {
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System.out.println("******************");
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System.out.println("At Sink2");
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System.out.println("******************");
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System.out.println("Received message " + message);
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}
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public interface MultiInputSink {
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String INPUT1 = "input1";
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String INPUT2 = "input2";
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@Input(INPUT1)
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SubscribableChannel input1();
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@Input(INPUT2)
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SubscribableChannel input2();
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}
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}
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76
multi-io/src/main/java/demo/SampleSource.java
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76
multi-io/src/main/java/demo/SampleSource.java
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/*
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* Copyright 2016 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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* http://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 demo;
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import org.springframework.cloud.stream.annotation.EnableBinding;
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import org.springframework.cloud.stream.annotation.Output;
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import org.springframework.context.annotation.Bean;
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import org.springframework.integration.annotation.InboundChannelAdapter;
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import org.springframework.integration.annotation.Poller;
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import org.springframework.integration.core.MessageSource;
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import org.springframework.messaging.Message;
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import org.springframework.messaging.MessageChannel;
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import org.springframework.messaging.support.GenericMessage;
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/**
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* @author Ilayaperumal Gopinathan
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*/
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@EnableBinding(SampleSource.MultiOutputSource.class)
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public class SampleSource {
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@Bean
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@InboundChannelAdapter(value = MultiOutputSource.OUTPUT1, poller = @Poller(fixedDelay = "1000", maxMessagesPerPoll = "1"))
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public synchronized MessageSource<String> messageSource1() {
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return new MessageSource<String>() {
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public Message<String> receive() {
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String message = "FromSource1";
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System.out.println("******************");
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System.out.println("From Source1");
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System.out.println("******************");
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System.out.println("Sending value: " + message);
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return new GenericMessage(message);
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}
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};
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}
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@Bean
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@InboundChannelAdapter(value = MultiOutputSource.OUTPUT2, poller = @Poller(fixedDelay = "1000", maxMessagesPerPoll = "1"))
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public synchronized MessageSource<String> timerMessageSource() {
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return new MessageSource<String>() {
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public Message<String> receive() {
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String message = "FromSource2";
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System.out.println("******************");
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System.out.println("From Source2");
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System.out.println("******************");
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System.out.println("Sending value: " + message);
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return new GenericMessage(message);
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}
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};
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}
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public interface MultiOutputSource {
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String OUTPUT1 = "output1";
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String OUTPUT2 = "output2";
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@Output(OUTPUT1)
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MessageChannel output1();
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@Output(OUTPUT2)
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MessageChannel output2();
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}
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}
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14
multi-io/src/main/resources/application.yml
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14
multi-io/src/main/resources/application.yml
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server:
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port: 8082
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spring:
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cloud:
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stream:
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bindings:
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output1:
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destination: test1
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output2:
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destination: test2
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input1:
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destination: test1
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input2:
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destination: test2
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36
multi-io/src/test/java/demo/ModuleApplicationTests.java
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36
multi-io/src/test/java/demo/ModuleApplicationTests.java
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/*
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* Copyright 2015 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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* http://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 demo;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.test.annotation.DirtiesContext;
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import org.springframework.test.context.web.WebAppConfiguration;
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import org.springframework.boot.test.SpringApplicationConfiguration;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
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@RunWith(SpringJUnit4ClassRunner.class)
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@SpringApplicationConfiguration(classes = MultipleIOChannelsApplication.class)
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@WebAppConfiguration
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@DirtiesContext
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public class ModuleApplicationTests {
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@Test
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public void contextLoads() {
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}
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}
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2
pom.xml
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pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>spring-cloud-stream-samples</artifactId>
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<packaging>pom</packaging>
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<url>https://github.com/spring-cloud/spring-cloud-stream-samples</url>
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<module>multibinder</module>
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<module>multibinder-differentsystems</module>
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<module>rxjava-processor</module>
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<module>multi-io</module>
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</modules>
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<dependencyManagement>
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<dependencies>
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