spring-cloud-bus example

.gitignore

@@ -1 +1,2 @@
 .idea
+.DS_Store

README.md

@@ -5,11 +5,16 @@ Not intended for production usage, but to reproduce issues or to try out things.
 
 ## Discovery
 
-### Kubernetes
 - [kubernetes](kubernetes)
 
-### Nacos
 - [nacos](nacos)
 
+- [eureka](eureka)
+
 ## Proxy
+
 - [nginx](nginx)
+
+## Cloud
+
+- [Spring Cloud Bus](spring-cloud-bus)

eureka/README.md

@@ -22,5 +22,5 @@ Admin UI: http://localhost:8080/
 
 ## Stop Everything
 ```bash
-docker-compose down -v
+docker compose down -v
 ```

eureka/buildAndRunAll.sh

@@ -12,4 +12,4 @@ cd apps/hello-world
 ./build.sh
 cd ../..
 
-docker-compose up -d
+docker compose up -d

nacos/README.md

@@ -21,7 +21,7 @@ http://localhost:8080/
 
 ## Stop Everything
 ```bash
-docker-compose down -v
+docker compose down -v
 ```
 
 ## Step-by-step Guide

nacos/buildAndRunAll.sh

@@ -12,4 +12,4 @@ cd apps/health-simulator
 ./build.sh
 cd ../..
 
-docker-compose up -d
+docker compose up -d

nginx/README.md

@@ -23,5 +23,5 @@ chmod u+x buildAndRunAll.sh
 
 ## Stop Everything
 ```bash
-docker-compose down -v
+docker compose down -v
 ```

nginx/buildAndRunAll.sh

@@ -8,4 +8,4 @@ cd apps/hello-world
 ./build.sh
 cd ../..
 
-docker-compose up -d
+docker compose up -d

spring-cloud-bus/README.md

@@ -0,0 +1,30 @@
+Sample for [Spring Cloud Bus](https://docs.spring.io/spring-cloud-bus/docs/current/reference/html/)
+
+Starts 
+- RabbitMQ (http://localhost:15672, credentials: guest/guest)
+- a Spring Boot Admin Server (http://localhost:8080)
+- a Hello World app (http://localhost:8081)
+
+If a bus-refresh is triggered on one of the spring boot apps, spring cloud sends a message to all other apps to 
+refresh their configuration (visible in the logs, currently there is nothing to refresh).
+
+Bus-refresh is now also available in the Spring Boot Admin UI on the environment page. 
+Bus-env and bus-shutdown are not yet supported.
+
+## Prerequisites
+
+- Java
+- Maven
+- Docker and Docker Compose
+
+## Run Everything
+You can run the whole build and start all apps in docker containers with the following script
+```bash
+chmod u+x buildAndRunAll.sh
+./buildAndRunAll.sh
+```
+
+## Stop Everything
+```bash
+docker compose down -v
+```

spring-cloud-bus/apps/hello-world/.gitignore

@@ -0,0 +1,5 @@
+target
+.idea
+*.iml
+*.log
+*.gz

spring-cloud-bus/apps/hello-world/Dockerfile

@@ -0,0 +1,8 @@
+# https://hub.docker.com/_/eclipse-temurin/
+FROM eclipse-temurin:17
+
+VOLUME /tmp
+
+COPY target/app.jar /opt/app/app.jar
+
+CMD ["bash", "-c", "java $JAVA_OPTS -jar /opt/app/app.jar"]

spring-cloud-bus/apps/hello-world/build.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Build App
+mvn package
+# Build Docker Image
+docker build --tag hello-world-cloudbus .

spring-cloud-bus/apps/hello-world/pom.xml

@@ -0,0 +1,86 @@
+<?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>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.4.1</version>
+	</parent>
+
+	<groupId>de.codecentric</groupId>
+	<artifactId>hello-world-cloud-bus</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<name>hello-world-cloud-bus</name>
+	<description>hello world with spring cloud-bus</description>
+
+	<properties>
+		<java.version>17</java.version>
+		<spring-boot-admin.version>3.4.2-SNAPSHOT</spring-boot-admin.version>
+		<spring-cloud.version>2024.0.0</spring-cloud.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-bus-amqp</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>de.codecentric</groupId>
+			<artifactId>spring-boot-admin-starter-client</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>de.codecentric</groupId>
+				<artifactId>spring-boot-admin-dependencies</artifactId>
+				<version>${spring-boot-admin.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-dependencies</artifactId>
+				<version>${spring-cloud.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+	<build>
+		<finalName>app</finalName>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<id>repackage</id>
+						<goals>
+							<goal>repackage</goal>
+							<!-- Build-Info for Info-Actuator -->
+							<goal>build-info</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

spring-cloud-bus/apps/hello-world/src/main/java/de/codecentric/helloworld/cloudbus/HelloWorld.java

@@ -0,0 +1,14 @@
+package de.codecentric.helloworld.cloudbus;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloWorld {
+
+  @GetMapping("/")
+  public String hello() {
+    return "Hello World!";
+  }
+
+}

spring-cloud-bus/apps/hello-world/src/main/java/de/codecentric/helloworld/cloudbus/HelloWorldCloudBusApplication.java

@@ -0,0 +1,13 @@
+package de.codecentric.helloworld.cloudbus;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class HelloWorldCloudBusApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(HelloWorldCloudBusApplication.class, args);
+	}
+
+}

spring-cloud-bus/apps/hello-world/src/main/resources/application.yml

@@ -0,0 +1,45 @@
+server:
+  port: 8081
+spring:
+  application: # Application-Info for the Info-Actuator
+    name: "@pom.artifactId@"
+  boot:
+    admin:
+      client:
+        url: "http://localhost:8080"
+  rabbitmq:
+    host: localhost
+    port: 5672
+    username: guest
+    password: guest
+management: # Actuator Configuration
+  endpoints:
+    web:
+      exposure:
+        include: "*"
+  endpoint: # Health-Actuator
+    health:
+      show-details: always
+    env:
+      post:
+        enabled: true
+  info: # Info-Actuator
+    java:
+      enabled: true
+    os:
+      enabled: true
+    build:
+      enabled: true
+    env:
+      enabled: true
+info: # Application-Info for the Info-Actuator
+  group: "@pom.groupId@"
+  artifact: "@pom.artifactId@"
+  description: "@pom.description@"
+  version: "@pom.version@"
+  spring-boot: "@pom.parent.version@"
+  # Tags for the Spring Boot Admin UI
+  tags:
+    spring-boot: "@pom.parent.version@"
+  level:
+    de.codecentric.boot.admin: DEBUG

spring-cloud-bus/apps/hello-world/src/test/java/de/codecentric/helloworld/cloudbus/HelloWorldCloudBusApplicationTests.java

@@ -0,0 +1,13 @@
+package de.codecentric.helloworld.cloudbus;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class HelloWorldCloudBusApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

spring-cloud-bus/apps/spring-boot-admin/.gitignore

@@ -0,0 +1,5 @@
+target
+.idea
+*.iml
+*.log
+*.gz

spring-cloud-bus/apps/spring-boot-admin/Dockerfile

@@ -0,0 +1,8 @@
+# https://hub.docker.com/_/eclipse-temurin/
+FROM eclipse-temurin:17
+
+VOLUME /tmp
+
+COPY target/app.jar /opt/app/app.jar
+
+CMD ["bash", "-c", "java $JAVA_OPTS -jar /opt/app/app.jar"]

spring-cloud-bus/apps/spring-boot-admin/build.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Build App
+mvn package
+# Build Docker Image
+docker build --tag spring-boot-admin-cloudbus .