[GR-60094] Review and move native-netty-plot demo to archive.

.github/workflows/native-netty-plot.yml → .github/workflows/archive-native-netty-plot.yml

@@ -1,38 +1,33 @@
-name: native-netty-plot
+name: archive/native-netty-plot
 on:
   push:
     paths:
-      - 'native-netty-plot/**'
-      - '.github/workflows/native-netty-plot.yml'
+      - 'archive/native-netty-plot/**'
+      - '.github/workflows/archive-native-netty-plot.yml'
   pull_request:
     paths:
-      - 'native-netty-plot/**'
-      - '.github/workflows/native-netty-plot.yml'
-  schedule:
-    - cron: "0 0 1 * *" # run every month
+      - 'archive/native-netty-plot/**'
+      - '.github/workflows/archive-native-netty-plot.yml'
   workflow_dispatch:
 permissions:
   contents: read
 jobs:
   run:
-    name: Run 'native-netty-plot'
+    name: Run 'archive/native-netty-plot'
     runs-on: ubuntu-latest
     timeout-minutes: 20
-    strategy:
-      matrix:
-        java-version: ['21', 'dev']
     steps:
       - uses: actions/checkout@v4
       - uses: graalvm/setup-graalvm@v1
         with:
-          java-version: ${{ matrix.java-version }}
+          java-version: '21'
           distribution: 'graalvm'
           github-token: ${{ secrets.GITHUB_TOKEN }}
           cache: 'maven'
           native-image-job-reports: 'true'
-      - name: Run 'native-netty-plot'
+      - name: Run 'archive/native-netty-plot'
         run: |
-          cd native-netty-plot
+          cd archive/native-netty-plot
           mvn --no-transfer-progress package
           java -agentlib:native-image-agent=config-output-dir=src/main/resources/META-INF/native-image/com.oracle.substratevm/netty-plot -jar target/netty-plot-0.1-jar-with-dependencies.jar &
           pid=$!

README.md

@@ -56,8 +56,8 @@ cd graalvm-demos
       <td align="left" width="70%">Demonstrates how you can influence the classes initialization at the image build time<br><strong>Technologies: </strong>Native Image, Maven<br><strong>Reference: </strong><a href="https://medium.com/graalvm/understanding-class-initialization-in-graalvm-native-image-generation-d765b7e4d6ed">Understanding Class Initialization in GraalVM Native Image Generation</a></td>
     </tr>
     <tr>
-      <td align="left" width="30%"><a href="/native-netty-plot/">native-netty-plot</a><br><a href="https://github.com/graalvm/graalvm-demos/actions/workflows/native-netty-plot.yml"><img alt="native-netty-plot" src="https://github.com/graalvm/graalvm-demos/actions/workflows/native-netty-plot.yml/badge.svg" /></a></td>
-      <td align="left" width="70%">A web server application, using the Netty framework, to demonstrate the use of isolates with Native Image<br><strong>Technologies: </strong>Native Image, Maven, Netty<br><strong>Reference: </strong><a href="https://medium.com/graalvm/instant-netty-startup-using-graalvm-native-image-generation-ed6f14ff7692">Instant Netty Startup using GraalVM Native Image Generation</a></td>
+      <td align="left" width="30%"><a href="/javagdbnative/">javagdbnative</a><br><a href="https://github.com/graalvm/graalvm-demos/actions/workflows/javagdbnative.yml"><img alt="javagdbnative" src="https://github.com/graalvm/graalvm-demos/actions/workflows/javagdbnative.yml/badge.svg" /></a></td>
+      <td align="left" width="70%">Demonstrates how to debug a Java application, built into a native executable in VS Code<br><strong>Technologies: </strong>Native Image, Maven, GraalVM Tools for Java<br><strong>Reference: </strong><a href="https://medium.com/graalvm/native-image-debugging-in-vs-code-2d5dda1989c1">Native Image Debugging in VS Code</a></td>
     </tr>
     <tr>
       <td align="left" width="30%"><a href="/native-image/add-logging/">native-image/add-logging</a><br><a href="https://github.com/graalvm/graalvm-demos/blob/ni-logging-demo/.github/workflows/native-image-add-logging.yml"><img alt="add-logging" src="https://github.com/graalvm/graalvm-demos/actions/workflows/native-image-add-logging.yml/badge.svg" /></a></td>

archive/native-netty-plot/.gitignore

@@ -0,0 +1,2 @@
+target/
+netty-plot

native-netty-plot/README.md → archive/native-netty-plot/README.md

@@ -1,4 +1,4 @@
-# Isolates for GraalVM Native Images
+# Use of Isolates with Native Image
 
 This application demonstrates the use of _isolates_ with [GraalVM Native Image](https://www.graalvm.org/latest/reference-manual/native-image/).
 The code implements a web service that renders plots of mathematical functions, such as _sin(x)_.
@@ -22,33 +22,34 @@ There is also the [Maven plugin for GraalVM Native Image building](https://graal
     git clone https://github.com/graalvm/graalvm-demos
     ```
     ```bash
-    cd graalvm-demos/native-netty-plot
+    cd graalvm-demos/archive/native-netty-plot
     ```
+
 For compilation, the `native-image` depends on the local toolchain.
-Please make sure that `glibc-devel`, `zlib-devel` (header files for the C library and zlib), and `gcc` are available on your system. Some Linux distributions may additionally require `libstdc++-static`.
+Make sure that `glibc-devel`, `zlib-devel` (header files for the C library and zlib), and `gcc` are available on your system. Some Linux distributions may additionally require `libstdc++-static`.
 See [Prerequisites for Native Image](https://www.graalvm.org/latest/reference-manual/native-image/#prerequisites).
 
-## Build the Project
+## Build the Application
 
 The example is built with Maven:
   ```bash
   mvn package
   ```
 
-This creates a JAR file with all dependencies embedded: `target/netty-plot-0.1-jar-with-dependencies.jar`.
+This creates a JAR file with all dependencies embedded in the _target/_ directory.
 
 ## Generate a Native Executable
 
 If the application is expected to use some dynamic features at run time (e.g., Reflection, Java Native Interface, class path resources), they have to be provided to the `native-image` tool in the form of configuration files.
 To avoid writing the configuration file yourself, apply the [tracing agent](https://www.graalvm.org/latest/reference-manual/native-image/metadata/AutomaticMetadataCollection/) when running on the Java HotSpot VM.
 It will observe the application behavior and create configuration files (_jni-config.json_, _reflect-config.json_, _proxy-config.json_ and _resource-config.json_) in the _META-INF/native-image_ directory on the class path.
-The _reflect-config.json_ file specifies classes which must be available via Java reflection at runtime.
+The _reflect-config.json_ file specifies classes which must be available via Java reflection at run time.
 
-1. Run the application on GraalVM JDK applying the tracing agent:
+1. Run the application on the GraalVM JDK applying the tracing agent:
     ```bash
     java -agentlib:native-image-agent=config-output-dir=src/main/resources/META-INF/native-image -jar target/netty-plot-0.1-jar-with-dependencies.jar
     ```
-    The server is started. Open _http://127.0.0.1:8080/?useIsolate=false_ in the browser to see the output.
+    The server is started. Open [http://127.0.0.1:8080/?useIsolate=false](http://127.0.0.1:8080/?useIsolate=false) in the browser to see the output.
 
 2. Terminate the application, `CTRL+C`.
 
@@ -58,33 +59,34 @@ The _reflect-config.json_ file specifies classes which must be available via Jav
     ```
     The result is an executable file that is around 22 MByte in size:
     ```bash
-    du -h netty-plot
-    22M    netty-plot
+    du -h target/netty-plot
     ```
 
 4. You can now run the executable:
     ```bash
     ./netty-plot
     ```
-    Open your web browser and navigate to http://127.0.0.1:8080/
+    Open your web browser and navigate to [http://127.0.0.1:8080/](http://127.0.0.1:8080/)
 
-5. Finally, you can open your browser and request rendering of a function, for example, by browsing to `http://127.0.0.1:8080/?function=abs((x-31.4)sin(x-pi/2))&xmin=0&xmax=31.4`.
+5. Finally, you can open your browser and request rendering of a function, for example, by browsing to [http://127.0.0.1:8080/?function=abs((x-31.4)sin(x-pi/2))&xmin=0&xmax=31.4](http://127.0.0.1:8080/?function=abs((x-31.4)sin(x-pi/2))&xmin=0&xmax=31.4).
 
 ### Background Information
 
 Instead of specifying any additional parameters on the command line, they may provided in a properties file in the input JAR file.
-The `native-image` builder automatically looks for files named `native-image.properties` and for any other configuration file under `META-INF/native-image` including subdirectories, and processes their contents.
+The `native-image` builder automatically looks for files named _native-image.properties_ and for any other configuration file under _META-INF/native-image_ including subdirectories, and processes their contents.
 The tracing agent writes the _reflect-config.json_ file specifying classes which must be available via Java reflection at run time.
 
-With Maven projects, the path convention is `META-INF/native-image/${groupId}/${artifactId}/native-image.properties`.
-In this example, the `META-INF/native-image/com.oracle.substratevm/netty-plot/native-image.properties` file contains the following:
+With Maven projects, the path convention is _META-INF/native-image/${groupId}/${artifactId}/native-image.properties_.
+In this example, the _META-INF/native-image/com.oracle.substratevm/netty-plot/native-image.properties_ file contains the following:
 ```bash
 ImageName = netty-plot
 Args = --link-at-build-time
 ```
 The `ImageName` property specifies the name of the resulting executable, while `Args` are treated like additional command-line arguments.
 
-### A note about the application
+#### A note about the application
 
-This example cannot run as a regular Java application (on the JVM) and it cannot be profiled.
+This example cannot run as a regular Java application (on HotSpot) and it cannot be profiled.
 It will fail because the program tries to create an [isolate which is a Native Image specific feature](https://medium.com/graalvm/isolates-and-compressed-references-more-flexible-and-efficient-memory-management-for-graalvm-a044cc50b67e).
+
+Read more in the blog post [Instant Netty Startup using GraalVM Native Image Generation](https://medium.com/graalvm/instant-netty-startup-using-graalvm-native-image-generation-ed6f14ff7692).

native-netty-plot/pom.xml → archive/native-netty-plot/pom.xml

@@ -9,7 +9,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>21</java.version>
-    <native.maven.plugin.version>0.9.28</native.maven.plugin.version>
+    <native.maven.plugin.version>0.10.4</native.maven.plugin.version>
     <maven.compiler.source>${java.specification.version}</maven.compiler.source>
     <maven.compiler.target>${java.specification.version}</maven.compiler.target>
   </properties>
@@ -60,7 +60,7 @@
                             <imageName>${imageName}</imageName>
                             <fallback>false</fallback>
                             <buildArgs>
-                                --no-fallback
+                                <buildArg>--no-fallback</buildArg>
                             </buildArgs>
                             <agent>
                                 <enabled>true</enabled>

archive/native-netty-plot/src/main/resources/META-INF/native-image/com.oracle.substratevm/netty-plot/native-image.properties

@@ -0,0 +1,2 @@
+ImageName = netty-plot
+Args = --link-at-build-time=com.oracle.svm.nettyplot