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Hello World samples for Java 11 (GoogleCloudPlatform#1380)
* simple hello world * Simple fat jar hello world * Reduce instance size * Add parent to pom.xml * Linting
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‎appengine-java11/hello-world/Main.java‎

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/*
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* Copyright 2019 Google Inc.
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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 com.sun.net.httpserver.HttpServer;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.net.InetSocketAddress;
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public class Main {
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public static void main(String[] args) throws IOException {
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// Create an instance of HttpServer bound to port 8080.
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HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0);
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// Set root URI path.
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server.createContext("/", (var t) -> {
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byte[] response = "Hello World from Google App Engine Java 11.".getBytes();
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t.sendResponseHeaders(200, response.length);
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try (OutputStream os = t.getResponseBody()) {
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os.write(response);
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}
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});
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// Start the server.
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server.start();
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}
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}

‎appengine-java11/hello-world/README.md‎

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# Hello World App for Google App Engine Standard with Java 11
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This sample shows how to deploy an application to Google App Engine, using the
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`entrypoint` element in the [app.yaml](app.yaml) to start your application. The
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sample uses the `java` command is used to compile and execute the Java source code.
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## Setup
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See [Prerequisites](../README.md#Prerequisites).
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## Deploy to App Engine Standard
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```
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gcloud app deploy
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```
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To view your app, use command:
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```
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gcloud app browse
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```
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Or navigate to http://<project-id>.appspot.com URL.

‎appengine-java11/hello-world/app.yaml‎

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runtime: java11
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entrypoint: java Main.java

‎appengine-java11/http-server/README.md‎

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# Single Fat Jar Application on Google App Engine Standard with Java 11
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This sample shows how to deploy an application to Google App Engine using the
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a fat jar. There is no `entrypoint` field listed in the [`app.yaml`](src/main/appengine/app.yaml),
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as the application is a single fat jar with the correct MainClass field in the MANIFEST.
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## Setup
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See [Prerequisites](../README.md#Prerequisites).
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## Deploy to App Engine Standard
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```
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mvn clean package appengine:deploy -Dapp.deploy.projectId=<your-project-id>
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```
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To view your app, use command:
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```
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gcloud app browse
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```
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Or navigate to http://<project-id>.appspot.com URL.

‎appengine-java11/http-server/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">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example.appengine</groupId>
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<artifactId>http-server</artifactId>
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<version>0.1</version>
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<!--
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The parent pom defines common style checks and testing strategies for our samples.
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Removing or replacing it should not effect the execution of the samples in anyway.
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-->
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<parent>
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<groupId>com.google.cloud.samples</groupId>
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<artifactId>shared-configuration</artifactId>
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<version>1.0.11</version>
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</parent>
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<properties>
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<maven.compiler.source>11</maven.compiler.source>
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<maven.compiler.target>11</maven.compiler.target>
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</properties>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-jar-plugin</artifactId>
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<version>3.1.1</version>
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<configuration>
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<archive>
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<manifest>
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<mainClass>com.example.appengine.Main</mainClass>
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</manifest>
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</archive>
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</configuration>
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</plugin>
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<plugin>
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<groupId>com.google.cloud.tools</groupId>
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<artifactId>appengine-maven-plugin</artifactId>
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<version>2.0.0-rc5</version>
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<configuration>
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<version>http-server</version>
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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>

‎appengine-java11/http-server/src/main/appengine/app.yaml‎

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runtime: java11
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# No need for an entrypoint with single fatjar with correct manifest class-path entry.

‎appengine-java11/http-server/src/main/java/com/example/appengine/Main.java‎

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/*
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* Copyright 2019 Google Inc.
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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 com.example.appengine;
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import com.sun.net.httpserver.HttpServer;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.net.InetSocketAddress;
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public class Main {
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public static void main(String[] args) throws IOException {
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// Create an instance of HttpServer with port 8080.
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HttpServer server = HttpServer.create(new InetSocketAddress(8080), 0);
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// Set root URI path.
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server.createContext("/", (var t) -> {
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byte[] response = "Hello World!".getBytes();
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t.sendResponseHeaders(200, response.length);
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try (OutputStream os = t.getResponseBody()) {
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os.write(response);
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}
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});
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// Create a second URI path.
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server.createContext("/foo", (var t) -> {
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byte[] response = "Foo!".getBytes();
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t.sendResponseHeaders(200, response.length);
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try (OutputStream os = t.getResponseBody()) {
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os.write(response);
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}
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});
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server.start();
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}
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}

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