Add a Java Spring Boot example

Along with supporting CI/CD jobs.

Change-Id: I068831ff1cce00c79f358c298333c9d749d1fbdf

java-spring-boot-demo/.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

java-spring-boot-demo/Dockerfile

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+#
+# Build stage
+#
+FROM docker.io/library/maven:3.9.2-eclipse-temurin-17 AS build
+COPY src /home/app/src
+COPY pom.xml /home/app
+RUN mvn -f /home/app/pom.xml clean package
+
+#
+# Package stage
+#
+FROM docker.io/library/eclipse-temurin:17-jre
+COPY --from=build /home/app/target/demo-0.0.1-SNAPSHOT.jar /usr/local/lib/demo.jar
+EXPOSE 8080
+ENTRYPOINT ["java","-jar","/usr/local/lib/demo.jar"]

java-spring-boot-demo/pom.xml

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+<?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>3.1.0</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>com.example</groupId>
+    <artifactId>demo</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>demo</name>
+    <description>Demo project for Spring Boot</description>
+    <properties>
+        <java.version>17</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

java-spring-boot-demo/src/main/java/com/example/demo/DemoApplication.java

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+package com.example.demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class DemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoApplication.class, args);
+    }
+
+}

java-spring-boot-demo/src/test/java/com/example/demo/DemoApplicationTests.java

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+package com.example.demo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class DemoApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}

zuul.d/jobs.yaml

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+- secret:
+    name: nebulous-opendev-quay.io
+    data:
+      quay.io:
+        username: nebulous+opendev
+        password: !encrypted/pkcs1-oaep
+          - GBkjBjEWyZXkCGKTaNF8e7A2SwGfOuLMHV27+GReJjgh2+shxVfYyXwhVW3ZhP2/ICl4Q
+            vHPKtkqEYUNsUMLkPTWA7VEljZoyKUIZjEBJO9VoMWt79VYC0oS6qzjVmuCblev2nPFQT
+            jJLvdhyXh/uNbVlQ4X8H2ha0+8a7ClBneW6jA0Wu77cuAYnQRmHhtD+Mob+pTrxzyta37
+            wjA/97DMLqKd62M285LFdE1GGh2+PhfUuP//+wz7Ha3XJw1sMQziUWcEAWW7puUDpPI5b
+            Qpx3NCGInXH3utIpuFo76lTeN5OVAvjotqNWrngA2FRsNKUtH9DEqv5Prl0CuJRs9QEZm
+            PTJRwN/2LG97VtNCUdW4J5laNTCUR/cVIgTbh+YIvJWjAn4HqgUjS5SXBkR5nVA9pSlGJ
+            lu1y4WCuxieRdNBZfLcMJUSuLrbRY1De5c5cTcz6R64/2D+h2YTSdp4WzlzHvsEL97eZI
+            gNRhv3vOHKcWdWeVMXiaAjcBSuuXZGtcuH+pWte+cRYHjRIgjxlQMHAltgfA71JZI+xnh
+            SB6gmEwff5LL0fB1KULXBKhePnlC8xcr80hwubFzmAa4VcCQ+Fv/v6zbajUV9RfkAm26F
+            dp5S9xBoTTAlmcJ/cEz4Eq+URYe9jiU/PKYqEzLGhpKpGWzH86kpkWXJOzceCA=
+
+- job:
+    name: nebulous-component-template-build-container-images
+    parent: opendev-build-container-image
+    description: Build the container images.
+    vars: &image_vars
+      promote_container_image_method: intermediate-registry
+      promote_container_image_job: nebulous-component-template-upload-container-image
+      container_images:
+        - context: java-spring-boot-demo
+          registry: quay.io
+          repository: quay.io/nebulous/component-template-java-spring-boot-demo
+
+- job:
+    name: nebulous-component-template-upload-container-images
+    parent: opendev-upload-container-image
+    description: Build and upload the container images.
+    vars: *image_vars
+    secrets:
+      - name: container_registry_credentials
+        secret: nebulous-opendev-quay.io
+        pass-to-parent: true
+
+- job:
+    name: nebulous-component-template-promote-container-images
+    parent: opendev-promote-container-image
+    description: Promote previously uploaded container images.
+    vars: *image_vars
+    secrets:
+      - name: container_registry_credentials
+        secret: nebulous-opendev-quay.io
+        pass-to-parent: true

zuul.d/project.yaml

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+- project:
+    check:
+      jobs:
+        - nebulous-component-template-build-container-images
+    gate:
+      jobs:
+        - nebulous-component-template-upload-container-images
+    promote:
+      jobs:
+        - nebulous-component-template-promote-container-images