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rieckpil
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update GraalVM blog post
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‎graalvm-intro/.java-version

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11.0

‎graalvm-intro/.vscode/launch.json

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‎graalvm-intro/Dockerfile

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FROM oracle/graalvm-ce:1.0.0-rc13
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COPY src/main/java/*.java /tmp/
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COPY prettyMe.json /tmp/
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# compile the Java source code to byte code
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RUN javac /tmp/HelloWorld.java
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RUN javac /tmp/PrettyPrintJSON.java
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# create native images
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WORKDIR /tmp
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RUN native-image HelloWorld
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RUN native-image --language:js PrettyPrintJSON
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RUN ./helloworld
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RUN ./prettyprintjson < /tmp/prettyMe.json
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FROM oracle/graalvm-ce:20.1.0
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RUN gu install native-image
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COPY src/main/java/*.java /tmp/
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COPY prettyMe.json /tmp/
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# compile the Java source code to byte code
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RUN javac /tmp/HelloWorld.java
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RUN javac /tmp/PrettyPrintJSON.java
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# create native images
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WORKDIR /tmp
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RUN native-image HelloWorld
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RUN native-image --language:js PrettyPrintJSON
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RUN ./helloworld
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RUN ./prettyprintjson < /tmp/prettyMe.json

‎graalvm-intro/README.md

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# Codebase for the blog post [#WHATIS? GraalVM](https://rieckpil.de/whatis-graalvm/)
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Steps to run this project:
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1. Clone this Git repository
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2. Navigate to the folder `graalvm-intro`
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3. Start your docker engine
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4. Build the image with `docker build -t graalvmintro .` and see the native image creation and execution during build
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5. Optional update `src/main/java` for a new Java class of your choice and add it to the `Dockerfile`
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# Codebase for the blog post [GraalVM – an introduction to the next level JVM](https://rieckpil.de/whatis-graalvm/)
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Steps to run this project:
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1. Clone this Git repository
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2. Navigate to the folder `graalvm-intro`
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3. Start your docker engine
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4. Build the image with `docker build -t graalvmintro .` and see the native image creation and execution during build
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5. Optional update `src/main/java` for a new Java class of your choice and add it to the `Dockerfile`

‎graalvm-intro/pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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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>de.rieckpil.blog</groupId>
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<artifactId>graalvm-intro</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>Introduction into GraalVM</name>
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<description>Simple quickstart for GraalVM</description>
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<properties>
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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<failOnMissingWebXml>false</failOnMissingWebXml>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<graalvm.version>1.0.0-rc13</graalvm.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.graalvm.sdk</groupId>
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<artifactId>graal-sdk</artifactId>
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<version>${graalvm.version}</version>
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</dependency>
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</dependencies>
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<build>
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<finalName>graalvm-intro</finalName>
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</build>
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</project>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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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>de.rieckpil.blog</groupId>
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<artifactId>graalvm-intro</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>Introduction into GraalVM</name>
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<description>Simple quickstart for GraalVM</description>
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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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<failOnMissingWebXml>false</failOnMissingWebXml>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<graalvm.version>20.1.0</graalvm.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.graalvm.sdk</groupId>
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<artifactId>graal-sdk</artifactId>
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<version>${graalvm.version}</version>
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</dependency>
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</dependencies>
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<build>
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<finalName>graalvm-intro</finalName>
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</build>
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</project>

‎graalvm-intro/src/main/java/PrettyPrintJSON.java

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import org.graalvm.polyglot.*;
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public class PrettyPrintJSON {
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public static void main(String[] args) throws java.io.IOException {
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BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
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String input = reader.lines().collect(Collectors.joining(System.lineSeparator()));
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try (Context context = Context.create("js")) {
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Value parse = context.eval("js", "JSON.parse");
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Value stringify = context.eval("js", "JSON.stringify");
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Value result = stringify.execute(parse.execute(input));
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System.out.println(result.asString());
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}
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}
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public static void main(String[] args) {
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BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
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String input = reader.lines().collect(Collectors.joining(System.lineSeparator()));
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try (Context context = Context.create("js")) {
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Value parse = context.eval("js", "JSON.parse");
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Value stringify = context.eval("js", "JSON.stringify");
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Value result = stringify.execute(parse.execute(input));
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System.out.println(result.asString());
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}
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}
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}

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