add main class from helidon MP with JPMS

Signed-off-by: tvallin <thibault.vallin@oracle.com>
tvallin · Jan 31, 2024 · 09fce31 · 09fce31
1 parent ca711ba
commit 09fce31
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Showing 6 changed files with 170 additions and 108 deletions.
diff --git a/archetypes/helidon/src/main/archetype/common/extra.xml b/archetypes/helidon/src/main/archetype/common/extra.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2022, 2023 Oracle and/or its affiliates.
+    Copyright (c) 2022, 2024 Oracle and/or its affiliates.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -72,12 +72,12 @@
                                 <value if="${flavor} == 'mp'">io.helidon.common.reactive</value>
                                 <value if="${flavor} == 'se'">io.helidon.faulttolerance</value>
                             </list>
-                            <list key="Main-helidon-imports">
+                            <list key="Main-helidon-imports" if="${flavor} == 'se'">
                                 <value>io.helidon.common.http.Http</value>
                                 <value>io.helidon.faulttolerance.BulkheadException</value>
                                 <value>io.helidon.faulttolerance.CircuitBreakerOpenException</value>
                             </list>
-                            <list key="Main-other-imports">
+                            <list key="Main-other-imports" if="${flavor} == 'se'">
                                 <value>java.util.concurrent.TimeoutException</value>
                             </list>
                             <list key="Main-routingBuilder">

diff --git a/archetypes/helidon/src/main/archetype/common/files/src/main/java/__pkg__/Main.java.mustache b/archetypes/helidon/src/main/archetype/common/files/src/main/java/__pkg__/Main.java.mustache
@@ -0,0 +1,35 @@
+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}}
+}
diff --git a/archetypes/helidon/src/main/archetype/common/observability.xml b/archetypes/helidon/src/main/archetype/common/observability.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2022, 2023 Oracle and/or its affiliates.
+    Copyright (c) 2022, 2024 Oracle and/or its affiliates.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -66,12 +66,6 @@ curl -H 'Accept: application/json' -X GET http://localhost:8080/metrics
                                             <value key="artifactId">helidon-microprofile-metrics</value>
                                         </map>
                                     </list>
-                                    <list key="Main-helidon-imports">
-                                        <value>io.helidon.metrics.MetricsSupport</value>
-                                    </list>
-                                    <list key="Main-routingBuilder">
-                                        <value><![CDATA[                .register(MetricsSupport.create()) // Metrics at "/metrics"]]></value>
-                                    </list>
                                     <list key="SimpleGreetService-imports">
                                         <value>org.eclipse.microprofile.metrics.MetricUnits</value>
                                         <value>org.eclipse.microprofile.metrics.annotation.Counted</value>
@@ -355,7 +349,7 @@ curl -H 'Accept: application/json' -X GET http://localhost:8080/metrics
                                     <value>io.helidon.health</value>
                                     <value if="${flavor} == 'se'">io.helidon.health.checks</value>
                                 </list>
-                                <list key="Main-helidon-imports">
+                                <list key="Main-helidon-imports" if="${flavor} == 'se'">
                                     <value>io.helidon.health.HealthSupport</value>
                                     <value>io.helidon.health.checks.HealthChecks</value>
                                 </list>

diff --git a/archetypes/helidon/src/main/archetype/common/packaging.xml b/archetypes/helidon/src/main/archetype/common/packaging.xml
@@ -102,9 +102,46 @@ kubectl delete -f app.yaml
                     <templates engine="mustache" transformations="mustache,packaged">
                         <directory>files</directory>
                         <includes>
-                            <include>src/main/java/**/module-info.java.mustache</include>
+                            <include>src/main/java/module-info.java.mustache</include>
+                            <include if="${flavor} == 'mp'">src/**/Main.java.mustache</include>
                         </includes>
                     </templates>
+                    <model if="${flavor} == 'mp'">
+                        <value key="mainClass">${package}.Main</value>
+                        <value key="Main-class-javadoc"><![CDATA[
+/**
+ * Main entry point of the application.
+ * <p>
+ * Note that this class is required when using modules as the module main class must be in a package that is either exported
+ * or opened by the module, see {@link java.lang.module.ModuleDescriptor#read(java.io.InputStream, java.util.function.Supplier)}.
+ * <p>
+ * This class provides a proper module main class and calls the {@link io.helidon.Main#main(String[]) built-in main class}.
+ */]]>
+                        </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.microprofile.cdi.Main.main(args);]]></value>
+                        </list>
+                        <list key="modules">
+                            <value>io.helidon.microprofile.cdi</value>
+                        </list>
+                    </model>
                 </output>
             </boolean>
         </inputs>

diff --git a/archetypes/helidon/src/main/archetype/se/common/common-se.xml b/archetypes/helidon/src/main/archetype/se/common/common-se.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2021, 2022 Oracle and/or its affiliates.
+    Copyright (c) 2021, 2024 Oracle and/or its affiliates.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -23,6 +23,12 @@
     <exec src="/common/common.xml"/>
     <source src="/common/sources.xml"/>
     <output>
+        <templates engine="mustache" transformations="mustache,packaged">
+            <directory>/common/files</directory>
+            <includes>
+                <include>src/**/Main.java.mustache</include>
+            </includes>
+        </templates>
         <model>
             <value key="mainClass">${package}.Main</value>
             <value key="parent-artifactId">helidon-se</value>
@@ -88,6 +94,91 @@
                 <value>io.helidon.common.http</value>
                 <value>io.helidon.config</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><![CDATA[        startServer();]]>
+                </value>
+            </list>
+            <list key="Main-class-content">
+                <value template="mustache"><![CDATA[
+    /**
+     * Start the server.
+     * @return the created {@link WebServer} instance
+     */
+    static Single<WebServer> startServer() {
+
+        // load logging configuration
+        LogConfig.configureRuntime();
+
+        // By default this will pick up application.yaml from the classpath
+        Config config = Config.create();
+
+        WebServer server = WebServer.builder(createRouting(config))
+                .config(config.get("server"))
+{{#Main-serverBuilder}}
+{{.}}
+{{/Main-serverBuilder}}
+                .build();
+
+        Single<WebServer> webserver = server.start();
+
+        // Try to start the server. If successful, print some info and arrange to
+        // print a message at shutdown. If unsuccessful, print the exception.
+        webserver.forSingle(ws -> {
+            {{Main-readyMessage}}
+            ws.whenShutdown().thenRun(() -> System.out.println("WEB server is DOWN. Good bye!"));
+        })
+        .exceptionallyAccept(t -> {
+            System.err.println("Startup failed: " + t.getMessage());
+            t.printStackTrace(System.err);
+        });
+
+        return webserver;
+    }
+
+    /**
+     * Creates new {@link Routing}.
+     *
+     * @return routing configured with JSON support, a health check, and a service
+     * @param config configuration of this server
+     */
+    private static Routing createRouting(Config config) {
+{{#Main-createRouting}}
+{{.}}
+{{/Main-createRouting}}
+
+        Routing.Builder builder = Routing.builder()
+{{#Main-routingBuilder}}
+{{.}}{{#last}}; {{/last}}
+{{/Main-routingBuilder}}
+
+{{#Main-security-routing-section}}
+{{.}}
+{{/Main-security-routing-section}}
+
+        return builder.build();
+    }]]>
+                </value>
+            </list>
         </model>
     </output>
 </archetype-script>
diff --git a/...types/helidon/src/main/archetype/se/common/files/src/main/java/__pkg__/Main.java.mustache b/...types/helidon/src/main/archetype/se/common/files/src/main/java/__pkg__/Main.java.mustache