4.x: Fix several issue in archetype and add native-image.properties to generated projects

archetypes/helidon/src/main/archetype/common/common.xml

@@ -40,12 +40,16 @@
         <transformation id="multipart-mustache">
             <replace regex="\.multipart.mustache$" replacement=""/>
         </transformation>
-        <templates engine="mustache" transformations="mustache">
+        <transformation id="native-image">
+            <replace regex="groupid" replacement="${groupId/\./\/}"/>
+            <replace regex="artifactid" replacement="${artifactId/\./\/}"/>
+        </transformation>
+        <templates engine="mustache" transformations="mustache,packaged">
             <directory>files</directory>
             <includes>
                 <include>.helidon.mustache</include>
                 <include>README.md.mustache</include>
-                <include>src/main/java/module-info.java.mustache</include>
+                <include>src/main/java/**/*.java.mustache</include>
             </includes>
         </templates>
         <model>

archetypes/helidon/src/main/archetype/common/docker.xml

@@ -31,7 +31,16 @@
                          name="GraalVM Native Image Support"
                          description="Add a native-image capable Dockerfile to your project"
                          default="false"
-                         optional="true"/>
+                         optional="true">
+                    <output>
+                        <templates engine="mustache" transformations="mustache,native-image">
+                            <directory>files</directory>
+                            <includes>
+                                <include>src/*/resources/META-INF/**/*.mustache</include>
+                            </includes>
+                        </templates>
+                    </output>
+                </boolean>
                 <boolean id="jlink-image" name="JLink Support"
                          description="Add a JLink capable Dockerfile to your project"
                          default="false"

archetypes/helidon/src/main/archetype/common/extra.xml

@@ -110,9 +110,6 @@ java -cp "target/classes:target/libs/*" {{package}}.WebClientMain PORT
                             <list key="modules">
                                 <value if="${flavor} == 'mp'">io.helidon.microprofile.faulttolerance</value>
                             </list>
-                            <list key="Main-other-imports" if="${flavor} == 'mp'">
-                                <value>java.util.concurrent.TimeoutException</value>
-                            </list>
                             <list key="maven-plugins" if="${flavor} == 'mp'">
                                 <value><![CDATA[
             <plugin>
@@ -289,7 +286,7 @@ restrictive-cors:
                                 <value><![CDATA[        .register("/cors-greet", corsSupportForGreeting(config), new GreetService())
 ]]></value>
                             </list>
-                            <list key="Main-content" if="${flavor} == 'se'">
+                            <list key="main-class-content" if="${flavor} == 'se'">
                                 <value><![CDATA[
     private static CorsSupport corsSupportForGreeting(Config config) {
         Config restrictiveConfig = config.get("restrictive-cors");

archetypes/helidon/src/main/archetype/common/files/src/main/java/__pkg__/Main.java.mustache

@@ -0,0 +1,37 @@
+
+package {{package}};
+
+{{#Main-java-imports}}
+import {{.}};
+{{/Main-java-imports}}
+
+{{#Main-helidon-imports}}
+import {{.}};
+{{/Main-helidon-imports}}
+
+{{#Main-other-imports}}
+import {{.}};
+{{/Main-other-imports}}
+
+{{#Main-static-imports}}
+import {{.}};
+{{/Main-static-imports}}
+
+{{main-class-javadoc}}
+public class Main {
+
+{{#main-class-fields}}
+{{.}}
+{{/main-class-fields}}
+
+    {{main-method-javadoc}}
+    public static void main(String[] args) {
+        {{#main-method-content}}
+        {{.}}
+        {{/main-method-content}}
+    }
+
+{{#main-class-content}}
+{{.}}
+{{/main-class-content}}
+}

archetypes/helidon/src/main/archetype/common/files/src/main/resources/META-INF/groupid/artifactid/native-image.properties.mustache

@@ -0,0 +1 @@
+Args=--initialize-at-build-time={{package}}

archetypes/helidon/src/main/archetype/common/observability.xml

@@ -401,13 +401,13 @@ curl -s -X GET http://localhost:8080/health
                                 <list key="Main-java-imports" if="${flavor} == 'se'">
                                     <value>java.time.Duration</value>
                                 </list>
-                                <list key="Main-fields" if="${flavor} == 'se'">
+                                <list key="main-class-fields" if="${flavor} == 'se'">
                                     <value><![CDATA[    private static long serverStartTime;]]></value>
                                 </list>
                                 <list key="Main-main" if="${flavor} == 'se'">
                                     <value><![CDATA[serverStartTime = System.currentTimeMillis();]]></value>
                                 </list>
-                                <list key="Main-content" if="${flavor} == 'se'">
+                                <list key="main-class-content" if="${flavor} == 'se'">
                                     <value><![CDATA[
     private static boolean isStarted() {
         return Duration.ofMillis(System.currentTimeMillis() - serverStartTime).getSeconds() >= 8;

archetypes/helidon/src/main/archetype/mp/common/common-mp.xml

@@ -81,6 +81,34 @@
                 <value>static org.hamcrest.MatcherAssert.assertThat</value>
                 <value>static org.hamcrest.Matchers.is</value>
             </list>
+            <value key="main-class-javadoc"><![CDATA[
+/**
+ * Main entry point of the application.
+ * This class is required when using modules with Helidon MP.
+ * Since version 3.1.2, the maven-jar-plugin set module attribute such as `ModuleMainClass`. The main class must be
+ * in a package that is either exported or opened by the module. This means we cannot reference a built-in class and
+ * therefore this Main class is created with a simple implementation that calls the built-in one.
+ * See the Documentation for `--main-class` option used by maven-jar-plugin:
+ * <a href="https://docs.oracle.com/en/java/javase/21/docs/specs/man/jar.html#operation-modifiers-valid-only-in-create-and-update-modes">documentation</a>
+ */]]></value>
+            <value key="main-method-javadoc"><![CDATA[
+    /**
+     * Main method. Starts CDI (and the application).
+     *
+     * @param args ignored
+     */]]></value>
+            <list key="main-class-fields">
+                <value><![CDATA[
+    /**
+    * Cannot be instantiated.
+    */
+    private Main() {
+    }
+]]></value>
+            </list>
+            <list key="main-method-content">
+                <value><![CDATA[        io.helidon.Main.main(args);]]></value>
+            </list>
         </model>
     </output>
 </archetype-script>

archetypes/helidon/src/main/archetype/se/common/common-se.xml

@@ -92,6 +92,62 @@ app:
 app:
     greeting: "Hello"]]></value>
             </list>
+            <value key="main-class-javadoc"><![CDATA[
+/**
+ * The application main class.
+ */]]></value>
+            <value key="main-method-javadoc"><![CDATA[/**
+     * Application main entry point.
+     * @param args command line arguments.
+     */]]></value>
+            <list key="main-class-fields">
+                <value order="0"><![CDATA[
+   /**
+     * Cannot be instantiated.
+     */
+   private Main() {
+   }
+]]></value>
+            </list>
+            <list key="main-method-content">
+                <value template="mustache"><![CDATA[
+         // load logging configuration
+        LogConfig.configureRuntime();
+
+        {{#Main-main}}
+        {{.}}
+        {{/Main-main}}
+
+        // initialize global config from default configuration
+        Config config = Config.create();
+        Config.global(config);
+
+        WebServer server = WebServer.builder()
+                .config(Config.global().get("server"))
+                .routing(Main::routing)
+                .build()
+                .start();
+
+        System.out.println("WEB server is up! http://localhost:" + server.port() + "/simple-greet");
+                    ]]></value>
+            </list>
+            <list key="main-class-content">
+                <value template="mustache"><![CDATA[
+    /**
+     * Updates HTTP Routing.
+     */
+    static void routing(HttpRouting.Builder routing) {
+        Config config = Config.global();
+        {{#Main-routing}}
+        {{.}}
+        {{/Main-routing}}
+
+        routing
+               {{#Main-routing-builder}}
+               {{.}}{{#last}}; {{/last}}
+               {{/Main-routing-builder}}
+    }]]></value>
+            </list>
         </model>
     </output>
 </archetype-script>

archetypes/helidon/src/main/archetype/se/custom/observability.xml

@@ -76,7 +76,7 @@
                 <value><![CDATA[Tracer tracer = TracerBuilder.create("server").build();
 ]]></value>
             </list>
-            <list key="Main-content" if="${tracing}">
+            <list key="main-class-content" if="${tracing}">
                 <value><![CDATA[
     private static class TracedHandler implements Handler {
         private final Tracer tracer;