first commit

.gitignore

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+target/
+.idea/
+*.iml

deployment/Jenkinsfile

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+pipeline{
+    agent none
+    options {
+        skipDefaultCheckout()
+    }
+
+    stages {
+        stage('Build') {
+            stages{
+                stage('Check out') {
+                    steps {
+                        checkout scm
+                        stash(name: 'hello_world', includes: '**', excludes: '**/.git/**')
+                    }
+                }
+                stage('Maven build') {
+                    steps {
+                        unstash 'hello_world'
+                        sh(script: 'mvn -B -f pom.xml clean package -Pdeploy -pl :hello-world -am')
+                        stash(name: 'war', includes: '**')
+                    }
+                }
+                stage('Create Build Config'){
+                    when {
+                        expression {
+                            openshift.withCluster(){
+                                return !openshift.selector("bc", "")
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

deployment/buildconfig.yaml

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+apiVersion: v1
+kind: List
+metadata:
+  name: hello-world
+items:
+- kind: BuildConfig
+  apiVersion: build.openshift.io/v1
+  metadata:
+    name: hello-world
+    labels:
+      build: hello-world
+  spec:
+    output:
+      to:
+        kind: ImageStreamTag
+        name: 'hello-world:latest'
+    resources:
+      limits:
+        cpu: 700m
+        memory: 800Mi
+    succesfulBuildsHistoryLimit: 5
+    failedBuildsHistoryLimit: 5
+    strategy:
+      type: Source
+      sourceStrategy:
+        from:
+          kind: DockerImage
+          name: 'open-liberty:19.0.0.9-kernel-java11'
+    postCommit: {}
+    source:
+      type: Binary
+      binary: {}
+    triggers:
+      - type: GitHub
+      github:
+        secret: 6FCAFBB9756846ED
+    runPolicy: Serial
+- kind: ImageStream
+  apiVersion: image.openshift.io/v1
+  metadata:
+    labels:
+      build: hello-world
+    name: hello-world
+  spec: {}

deployment/hello-world-template.yaml

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+kind: Template
+metadata:
+  name: hello-world
+  annotations:
+    description: "Deployment Config for Hello World application"
+apiVersion: v1
+objects:
+- apiVersion: apps.openshift.io/v1
+  kind: DeploymentConfig
+  metadata:
+    annotations:
+      openshift.io/generated-by: OpenShiftNewApp
+    labels:
+      app: hello-world
+      component: hello-world
+    name: hello-world
+  spec:
+    replicas: 1
+    revisionHistoryLimit: 10
+    selector:
+      app: hello-world
+      deploymentconfig: hello-world
+    strategy:
+      activeDeadlineSeconds: 21600
+      resources: {}
+      rollingParams:
+        intervalSeconds: 1
+        maxSurge: 25%
+        maxUnavailable: 25%
+        timeoutSeconds: 600
+        updatePeriodSeconds: 1
+      type: Rolling
+    template:
+      metadata:
+        annotations:
+          openshift.io/generated-by: OpenShiftNewApp
+        labels:
+          app: hello-world
+          component: hello-world
+          deploymentconfig: hello-world
+      spec:
+        containers:
+        - envFrom:
+          image: ' '
+          imagePullPolicy: Always
+          name: hello-world
+          ports:
+          - containerPort: 9080
+            protocol: TCP
+          - containerPort: 9443
+            protocol: TCP
+          resources: {}
+          terminationMessagePath: /dev/termination-log
+          terminationMessagePolicy: File
+        dnsPolicy: ClusterFirst
+        restartPolicy: Always
+        scheduler-name: default-scheduler
+        securityContext: {}
+        terminationGracePeriodSeconds: 30
+    test: false
+    triggers:
+    - imageChangeParams:
+        containerNames:
+        - hello-world
+        from:
+          kind: ImageStreamTag
+          name: hello-world:latest
+      type: ImageChange
+    - type: ConfigChange
+- apiVersion: route.openshift.io/v1
+  kind: Route
+  metadata:
+    annotations:
+      openshift.io/host.generated: "true"
+    labels:
+      app: hello-world
+      component: hello-world
+    name: hello-world
+  spec:
+    port:
+      targetPort: 9080-tcp
+    to:
+      kind: Service
+      name: hello-world
+      weight: 100
+    wildcardPolicy: None
+- apiVersion: v1
+  kind: Service
+  metadata:
+    annotations:
+      openshift.io/generated-by: OpenShiftNewApp
+    labels:
+      app: hello-world
+      component: hello-world
+    name: hello-world
+  spec:
+    ports:
+    - name: 9080-tcp
+      port: 9080
+      protocol: TCP
+      targetPort: 9080
+    - name: 9443-tcp
+      port: 9443
+      protocol: TCP
+      targetPort: 9080
+    selector:
+      app: hello-world
+      deploymentconfig: hello-world
+    sessionAffinity: None
+    type: ClusterIP

deployment/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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.sander</groupId>
+    <artifactId>hello-world-deployment</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.sander</groupId>
+            <artifactId>hello-world</artifactId>
+            <version>${project.version}</version>
+            <type>war</type>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>copy</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>copy-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>${basedir}/target</outputDirectory>
+                            <stripVersion>true</stripVersion>
+                            <overWriteReleases>true</overWriteReleases>
+                            <overWriteSnapshots>true</overWriteSnapshots>
+                            <overWriteIfNewer>true</overWriteIfNewer>
+                            <includeTypes>war</includeTypes>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.sander</groupId>
+    <artifactId>hello-world</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>war</packaging>
+    <name>${project.artifactId}</name>
+    <description>Simple application to demonstrate deployment on openshift</description>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>javax</groupId>
+            <artifactId>javaee-api</artifactId>
+            <version>7.0</version>
+        </dependency>
+    </dependencies>
+</project>

src/main/java/org/sander/hello/HelloWorldController.java

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+package org.sander.hello;
+
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+
+@Path("/hello")
+public class HelloWorldController {
+
+    @GET
+    @Produces(MediaType.TEXT_PLAIN)
+    public String getHello(){
+        return "Hello World";
+    }
+}