8000 Add GCF JVM language samples (Kotlin/Scala/Groovy) (#2485) · georg78sf/java-docs-samples@41fa541 · GitHub
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Ace Nassri
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Add GCF JVM language samples (Kotlin/Scala/Groovy) (GoogleCloudPlatform#2485)
* Add Kotlin/Scala samples * Add region tags * Downgrade kotlin version to match build environment * Add Groovy sample + remove cruft from Kotlin * Add missing region tags * pom.xml: move surefire after Kotlin compilation * Move non-Java languages into separate paths + fix test failures * Follow DRIFT test naming convention * Add newlines where appropriate
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‎functions/snippets/pom.xml

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<maven.compiler.target>11</maven.compiler.target>
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<maven.compiler.source>11</maven.compiler.source>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<kotlin.version>1.2.41</kotlin.version>
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<groovy.version>3.0.2</groovy.version>
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</properties>
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<dependencies>
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<version>3.4.2</version>
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</dependency>
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<!-- Required for scala samples -->
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<dependency>
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<groupId>org.scala-lang</groupId>
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<artifactId>scala-library</artifactId>
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<version>2.13.1</version>
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</dependency>
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<!-- Required for groovy samples -->
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<dependency>
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<groupId>org.codehaus.groovy</groupId>
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<artifactId>groovy-all</artifactId>
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<version>${groovy.version}</version>
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<type>pom</type>
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</dependency>
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<!-- The following dependencies are only required for testing -->
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<dependency>
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<groupId>junit</groupId>
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<version>1.0.0-alpha-2-rc3</version>
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<type>jar</type>
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</dependency>
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<dependency>
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<groupId>org.jetbrains.kotlin</groupId>
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<artifactId>kotlin-stdlib-jdk8</artifactId>
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<version>${kotlin.version}</version>
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</dependency>
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<dependency>
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<groupId>org.jetbrains.kotlin</groupId>
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<artifactId>kotlin-test</artifactId>
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<version>${kotlin.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<!-- Disable tests during GCF builds -->
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<build>
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<plugins>
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<plugin>
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<groupId>org.codehaus.gmavenplus</groupId>
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<artifactId>gmavenplus-plugin</artifactId>
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<version>1.7.0</version>
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<executions>
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<execution>
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<id>groovy-compile</id>
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<phase>process-resources</phase>
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<goals>
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<goal>addSources</goal>
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<goal>compile</goal>
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</goals>
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</execution>
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</executions>
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<dependencies>
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<dependency>
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<groupId>org.codehaus.groovy</groupId>
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<artifactId>groovy-all</artifactId>
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<!-- any version of Groovy \>= 1.5.0 should work here -->
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<version>${groovy.version}</version>
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<scope>runtime</scope>
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<type>pom</type>
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</dependency>
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</dependencies>
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</plugin>
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<plugin>
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<groupId>net.alchim31.maven</groupId>
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<artifactId>scala-maven-plugin</artifactId>
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<version>4.3.1</version>
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<executions>
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<execution>
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<id>scala-compile</id>
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<phase>process-resources</phase>
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<goals>
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<goal>add-source</goal>
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<goal>compile</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.jetbrains.kotlin</groupId>
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<artifactId>kotlin-maven-plugin</artifactId>
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<version>${kotlin.version}</version>
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<executions>
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<execution>
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<id>compile</id>
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<phase>compile</phase>
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<goals>
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<goal>compile</goal>
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</goals>
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<configuration>
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<sourceDirs>
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<source>src/main/kotlin</source>
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<source>target/generated-sources/annotations</source>
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</sourceDirs>
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</configuration>
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</execution>
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<execution>
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<id>test-compile</id>
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<phase>test-compile</phase>
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<goals>
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<goal>test-compile</goal>
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</goals>
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</execution>
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</executions>
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<configuration>
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<jvmTarget>1.8</jvmTarget>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-surefire-plugin</artifactId>
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<plugin> <!-- Required for Java 8 (Alpha) functions in the inline editor -->
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<executions>
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<execution>
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<id>compile</id>
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<phase>compile</phase>
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<goals>
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<goal>compile</goal>
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</goals>
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</execution>
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<execution>
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<id>testCompile</id>
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<phase>test-compile</phase>
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<goals>
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<goal>testCompile</goal>
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</goals>
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</execution>
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</executions>
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<configuration>
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<excludes>
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<exclude>.google/</exclude>

‎functions/snippets/src/main/groovy/com/example/functions/GroovyHelloBackground.groovy

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package com.example.functions
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// [START functions_helloworld_background_groovy]
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import com.google.cloud.functions.BackgroundFunction
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import com.google.cloud.functions.Context
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import com.google.cloud.functions.HttpRequest
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import java.util.logging.Logger;
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class GroovyHelloBackground implements BackgroundFunction<HttpRequest> {
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private static final Logger LOGGER = Logger.getLogger(GroovyHelloBackground.class.name)
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@Override
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void accept(HttpRequest request, Context context) {
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String name = "world"
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if (request.getFirstQueryParameter("name").isPresent()) {
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name = request.getFirstQueryParameter("name").get()
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}
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LOGGER.info(String.format("Hello %s!", name))
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}
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}
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// [END functions_helloworld_background_groovy]

‎functions/snippets/src/main/groovy/com/example/functions/GroovyHelloWorld.groovy

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package com.example.functions
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// [START functions_helloworld_get_groovy]
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import com.google.cloud.functions.HttpFunction
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import com.google.cloud.functions.HttpRequest
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import com.google.cloud.functions.HttpResponse
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class GroovyHelloWorld implements HttpFunction {
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@Override
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void service(HttpRequest request, HttpResponse response) {
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response.writer.write("Hello World!")
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}
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}
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// [END functions_helloworld_get_groovy]

‎functions/snippets/src/main/java/com/example/functions/ScalaHelloBackground.scala

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package com.example.functions
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// [START functions_helloworld_background]
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import com.google.cloud.functions.{BackgroundFunction, Context, HttpRequest}
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import java.util.logging.Logger
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class ScalaHelloBackground extends BackgroundFunction[HttpRequest] {
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val LOGGER = Logger.getLogger(this.getClass.getName)
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override def accept(t: HttpRequest, context: Context): Unit = {
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var name = "world"
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if (t.getFirstQueryParameter("name").isPresent) {
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name = t.getFirstQueryParameter("name").get()
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}
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LOGGER.info(String.format("Hello %s!", name))
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}
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}
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// [END functions_helloworld_background]

‎functions/snippets/src/main/java/com/example/functions/ScalaHelloWorld.scala

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package com.example.functions
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import com.google.cloud.functions.{HttpFunction, HttpRequest, HttpResponse}
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// [START functions_helloworld_get]
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class ScalaHelloWorld extends HttpFunction {
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override def service(httpRequest: HttpRequest, httpResponse: HttpResponse): Unit = {
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httpResponse.getWriter.write("Hello World!")
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}
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}
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// [END functions_helloworld_get]

‎functions/snippets/src/main/kotlin/com/example/functions/KotlinHelloBackground.kt

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/*
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* Copyright 2020 Google LLC
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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.functions
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// [START functions_helloworld_background_kotlin]
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import com.google.cloud.functions.BackgroundFunction
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import com.google.cloud.functions.Context
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import com.google.cloud.functions.HttpRequest
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import java.util.logging.Logger
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class KotlinHelloBackground : BackgroundFunction<HttpRequest> {
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override fun accept(request: HttpRequest, context: Context) {
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var name = "world"
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if (request.getFirstQueryParameter("name").isPresent) {
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name = request.getFirstQueryParameter("name").get()
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}
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LOGGER.info(String.format("Hello %s!", name))
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}
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companion object {
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private val LOGGER = Logger.getLogger(KotlinHelloBackground::class.java.name)
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}
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}
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// [END functions_helloworld_background_kotlin]

‎functions/snippets/src/main/kotlin/com/example/functions/KotlinHelloWorld.kt

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/*
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* Copyright 2020 Google LLC
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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.functions
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// [START functions_helloworld_get_kotlin]
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import com.google.cloud.functions.HttpFunction
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import com.google.cloud.functions.HttpRequest
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import com.google.cloud.functions.HttpResponse
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import java.io.IOException
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import java.util.logging.Logger
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class KotlinHelloWorld : HttpFunction {
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// Simple function to return "Hello World"
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@Throws(IOException::class)
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override fun service(request: HttpRequest, response: HttpResponse) {
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response.writer.write("Hello World!")
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}
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}
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// [END functions_helloworld_get_kotlin]

‎functions/snippets/src/test/java/com/example/functions/GroovyTests.java

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/*
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* Copyright 2020 Google LLC
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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.functions;
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import static com.google.common.truth.Truth.assertThat;
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import static org.mockito.Mockito.when;
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import com.google.cloud.functions.HttpRequest;
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import com.google.cloud.functions.HttpResponse;
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import com.google.common.testing.TestLogHandler;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.IOException;
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import java.io.StringReader;
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import java.io.StringWriter;
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import java.util.Optional;
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import java.util.logging.Logger;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.JUnit4;
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import org.mockito.Mock;
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import org.mockito.Mockito;
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import org.powermock.api.mockito.PowerMockito;
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@RunWith(JUnit4.class)
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public class GroovyTests {
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@Mock private HttpRequest request;
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@Mock private HttpResponse response;
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private static final Logger BACKGROUND_LOGGER = Logger.getLogger(
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GroovyHelloBackground.class.getName());
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private static final TestLogHandler logHandler = new TestLogHandler();
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private BufferedWriter writerOut;
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private StringWriter responseOut;
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@BeforeClass
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public static void beforeClass() {
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BACKGROUND_LOGGER.addHandler(logHandler);
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}
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@Before
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public void beforeTest() throws IOException {
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Mockito.mockitoSession().initMocks(this);
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request = PowerMockito.mock(HttpRequest.class);
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response = PowerMockito.mock(HttpResponse.class);
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BufferedReader reader = new BufferedReader(new StringReader("{}"));
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PowerMockito.when(request.getReader()).thenReturn(reader);
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responseOut = new StringWriter();
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writerOut = new BufferedWriter(responseOut);
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PowerMockito.when(response.getWriter()).thenReturn(writerOut);
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logHandler.clear();
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}
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@After
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public void afterTest() {
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System.out.flush();
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logHandler.flush();
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}
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@Test
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public void functionsHelloworldGetGroovy_shouldPrintHelloWorld() throws IOException {
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new GroovyHelloWorld().service(request, response);
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writerOut.flush();
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assertThat(responseOut.toString()).contains("Hello World!");
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}
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@Test
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public void functionsHelloworldBackgroundGroovy_shouldPrintName() throws Exception {
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when(request.getFirstQueryParameter("name")).thenReturn(Optional.of("John"));
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new GroovyHelloBackground().accept(request, new MockContext());
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String message = logHandler.getStoredLogRecords().get(0).getMessage();
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assertThat("Hello John!").isEqualTo(message);
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}
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@Test
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public void functionsHelloworldBackgroundGroovy_shouldPrintHelloWorld() throws Exception {
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new GroovyHelloBackground().accept(request, new MockContext());
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String message = logHandler.getStoredLogRecords().get(0).getMessage();
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assertThat("Hello world!").isEqualTo(message);
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}
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}

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