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‎.gitignore

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### IntelliJ IDEA ###
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.idea
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!.idea/
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.idea/*
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!.idea/runConfigurations/
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*.iws
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*.iml
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*.ipr
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*.log*
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target/
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### NetBeans ###
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/nbproject/private/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/
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build/
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### VS Code ###
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.vscode/

‎.idea/runConfigurations/GatewayApplication1.xml

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‎.idea/runConfigurations/GatewayApplication2.xml

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‎.idea/runConfigurations/PingApplication1.xml

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‎.idea/runConfigurations/PingApplication2.xml

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‎.idea/runConfigurations/PongApplication.xml

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‎.java-version

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11.0

‎.mvn/wrapper/MavenWrapperDownloader.java

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/*
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* Copyright 2007-present 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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import java.net.*;
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import java.io.*;
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import java.nio.channels.*;
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import java.util.Properties;
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public class MavenWrapperDownloader {
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private static final String WRAPPER_VERSION = "0.5.5";
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/**
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* Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
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*/
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private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
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+ WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
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/**
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* Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
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* use instead of the default one.
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*/
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private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
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".mvn/wrapper/maven-wrapper.properties";
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/**
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* Path where the maven-wrapper.jar will be saved to.
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*/
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private static final String MAVEN_WRAPPER_JAR_PATH =
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".mvn/wrapper/maven-wrapper.jar";
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/**
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* Name of the property which should be used to override the default download url for the wrapper.
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*/
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private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
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public static void main(String args[]) {
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System.out.println("- Downloader started");
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File baseDirectory = new File(args[0]);
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System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
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// If the maven-wrapper.properties exists, read it and check if it contains a custom
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// wrapperUrl parameter.
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File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
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String url = DEFAULT_DOWNLOAD_URL;
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if(mavenWrapperPropertyFile.exists()) {
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FileInputStream mavenWrapperPropertyFileInputStream = null;
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try {
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mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
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Properties mavenWrapperProperties = new Properties();
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mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
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url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
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} catch (IOException e) {
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System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
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} finally {
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try {
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if(mavenWrapperPropertyFileInputStream != null) {
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mavenWrapperPropertyFileInputStream.close();
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}
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} catch (IOException e) {
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// Ignore ...
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}
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}
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}
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System.out.println("- Downloading from: " + url);
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File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
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if(!outputFile.getParentFile().exists()) {
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if(!outputFile.getParentFile().mkdirs()) {
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System.out.println(
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"- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
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}
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}
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System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
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try {
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downloadFileFromURL(url, outputFile);
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System.out.println("Done");
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System.exit(0);
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} catch (Throwable e) {
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System.out.println("- Error downloading");
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e.printStackTrace();
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System.exit(1);
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}
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}
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private static void downloadFileFromURL(String urlString, File destination) throws Exception {
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if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
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String username = System.getenv("MVNW_USERNAME");
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char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
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Authenticator.setDefault(new Authenticator() {
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@Override
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protected PasswordAuthentication getPasswordAuthentication() {
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return new PasswordAuthentication(username, password);
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}
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});
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}
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URL website = new URL(urlString);
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ReadableByteChannel rbc;
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rbc = Channels.newChannel(website.openStream());
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FileOutputStream fos = new FileOutputStream(destination);
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fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
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fos.close();
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rbc.close();
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}
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}

‎.mvn/wrapper/maven-wrapper.jar

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‎.mvn/wrapper/maven-wrapper.properties

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distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
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wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar

‎README.md

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# spring-cloud-gateway-rsocket example
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Polyglot RSocket clients communication via RSocket gateway cluster...
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```
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+------+ +------+
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+~-*-~--~> | gw 2 | <~-~> | pong |
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| +------+ +------+
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Client V | Server
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+------+ +------+ +------+
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| ping | <~-~> | gw 1 | <~-~> | gw 3 |
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+------+ +------+ +------+
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```
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* no service mesh
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* no sidecar
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* no circuit breaker
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```bash
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./mvnw
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SPRING_PROFILES_ACTIVE=gateway1 java -jar ./gateway/target/*.jar
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SPRING_PROFILES_ACTIVE=gateway2 java -jar ./gateway/target/*.jar
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java -jar ./ping-pong/pong/target/*.jar
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java -jar ./ping-pong/ping/target/*.jar
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```
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## Versions
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* `spring-cloud` -> `Hoxton.RELEASE`
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* `spring-cloud-gateway-rsocket` -> `2.2.0.M2`
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* `spring-cloud-rsocket-broker` -> `0.2.0.BUILD-SNAPSHOT`
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* `spring-cloud-rsocket-client` -> `0.2.0.BUILD-SNAPSHOT`
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## Resources
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* https://www.infoq.com/presentations/rsocket-spring-cloud-gateway
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* https://github.com/spencergibb/rsocket-routing-sample

‎gateway/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"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<groupId>daggerok</groupId>
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<artifactId>spring-cloud-gateway-rsocket-example</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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<relativePath>..</relativePath>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<artifactId>gateway</artifactId>
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<packaging>jar</packaging>
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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-rsocket-broker</artifactId>
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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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</plugin>
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</plugins>
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</build>
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</project>

‎gateway/src/main/java/daggerok/gateway/GatewayApplication.java

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package daggerok.gateway;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import reactor.core.publisher.Hooks;
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@SpringBootApplication
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public class GatewayApplication {
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public static void main(String[] args) {
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Hooks.onOperatorDebug();
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SpringApplication.run(GatewayApplication.class, args);
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}
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}

‎gateway/src/main/resources/application.yaml

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spring:
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output:
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ansi:
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enabled: always
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application:
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name: gateway
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logging:
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level:
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org.springframework.cloud.gateway.rsocket: DEBUG
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---
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spring:
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profiles: gateway1
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rsocket:
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server:
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port: 7001
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cloud:
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gateway:
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rsocket:
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id: ${spring.profiles}
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route-id: 111
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service-name: ${spring.application.name}
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brokers:
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- host: gateway2-127-0-0-1.nip.io
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port: 7002
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- host: gateway3-127-0-0-1.nip.io
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port: 7003
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---
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spring:
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profiles: >
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gateway2
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rsocket:
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server:
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port: 7002
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cloud:
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gateway:
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rsocket:
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id: ${spring.profiles}
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route-id: 222
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service-name: ${spring.application.name}
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brokers:
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- host: gateway1-127-0-0-1.nip.io
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port: 7001
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- host: gateway3-127-0-0-1.nip.io
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#host: 127.0.0.1
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port: 7003
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#---
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#spring:
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# profiles:
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# - gateway3
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# rsocket:
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# server:
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# port: 7003
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# cloud:
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# gateway:
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# rsocket:
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# id: ${spring.profiles}
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# route-id: 333
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# service-name: ${spring.application.name}
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# brokers:
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# - host: gateway1-127-0-0-1.nip.io
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# port: 7001
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# - host: gateway2-127-0-0-1.nip.io
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# port: 7002

‎gateway/src/test/java/daggerok/gateway/GatewayApplicationTests.java

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package daggerok.gateway;
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import org.junit.jupiter.api.Test;
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import org.springframework.boot.test.context.SpringBootTest;
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@SpringBootTest
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class GatewayApplicationTests {
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@Test
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void contextLoads() { }
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}

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