Add Java 23 test source

.github/workflows/CI.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     strategy:
       matrix:
-        java-version: [ '17', '18', '19', '20', '21', '22' ]
+        java-version: [ '17', '18', '19', '20', '21', '22', '23-ea' ]
 
     runs-on: ubuntu-latest
 
@@ -36,14 +36,14 @@ jobs:
       uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4.2.1
       with:
         java-version: ${{ matrix.java-version }}
-        distribution: 'oracle'
+        distribution: 'temurin'
 
     # This is the JDK gradle will use since gradle does not always support the -ea version
     - name: Set up JDK 17
       uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4.2.1
       with:
         java-version: '17'
-        distribution: 'oracle'
+        distribution: 'temurin'
         cache: gradle    
 
     - name: Toolchain debug

.github/workflows/scripts/ClassVersionChecker.java

@@ -34,6 +34,7 @@ public static void main(String[] args) throws IOException {
         majorCodeMap.put("20", 64);
         majorCodeMap.put("21", 65);
         majorCodeMap.put("22", 66);
+        majorCodeMap.put("23", 67);
 
         String filename = args[0];
         int expected = majorCodeMap.get(args[1]);

io.openliberty.java.internal_fat_23/.gitignore

@@ -0,0 +1,5 @@
+.gradle/
+/bin/
+/build/
+/generated/
+/wlp

io.openliberty.java.internal_fat_23/README.md

@@ -0,0 +1,48 @@
+# Repo for quick testing of Liberty apps
+Especially useful for new Java versions
+
+
+### For versions of Java that already have gradle support
+To build the WAR file locally, from the root directory of the open-liberty-misc repository run:
+
+```
+./gradlew io.openliberty.java.internal_fat_23:build
+```
+
+
+### For versions of Java that do not have gradle support yet
+Make the following updates in the following files (example given here as if you were working with pre-gradle support for Java 23):
+
+- In **build.gradle**, set:
+
+```
+   languageVersion = JavaLanguageVersion.of(23)
+```
+
+- And then set the environment variable JDK23 to your Java 23 JDK home, for example:
+
+```
+(Mac)      export JDK23="/path/to/your/jdk23/home"
+(Unix)     JDK23="/path/to/your/jdk23/home"
+(Win DOS)  set JDK23="C:\path\to\your\jdk23\home"
+(Win PS)   $env:JDK23="C:\path\to\your\jdk23\home"
+```
+
+- To build the WAR file locally, from the root directory of the open-liberty-misc repository run:
+
+```
+./gradlew io.openliberty.java.internal_fat_23:build -P"org.gradle.java.installations.fromEnv=JDK23"
+```
+where **JDK23** is a system environment variable that reflects the location of your Java 23 JDK to use to compile the source (see last step).
+
+
+### When moving to a new release of Java
+- **build.gradle**
+
+```
+    appUrl = 'http://localhost:9080/io.openliberty.java.internal_fat_23/'
+
+    <Make sure to add any new dependencies or update existing ones to the proper levels>
+```
+
+Then add new code to **TestServices.java** either directly or via another class and make sure **TestApp.java** is in the same directory.

io.openliberty.java.internal_fat_23/build.gradle

@@ -0,0 +1,57 @@
+/*******************************************************************************
+ * Copyright (c) 2024 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+// To create this WAR file (ex: ./gradlew build...) for newer versions of Java (typically early access ones) before gradle supports it
+// See the README.md file
+
+apply plugin: 'war'
+
+description = "Basic Liberty repo"
+
+tasks.withType(JavaCompile) {
+    options.encoding = 'UTF-8'
+}
+
+compileJava {
+    doFirst {
+        options.compilerArgs = [
+            '--module-path', classpath.asPath,
+            '--enable-preview'
+        ]
+        classpath = files()
+        options.warnings = true
+        options.deprecation = true
+        options.debug = true
+        options.incremental = false
+    }
+}
+
+java {
+  toolchain {
+    languageVersion = JavaLanguageVersion.of(23)
+  }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compileOnly group: 'javax.ws.rs', name: 'javax.ws.rs-api', version: '2.1.1'
+    compileOnly group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1'
+    compileOnly group: 'javax.enterprise', name: 'cdi-api', version: '2.0'
+}
+
+// This is the URL the test application will be available at
+ext {
+	appUrl = 'http://localhost:9080/io.openliberty.java.internal_fat_23/'
+}

io.openliberty.java.internal_fat_23/run/jvm.options

@@ -0,0 +1,5 @@
+# Enable Java preview features
+--enable-preview
+
+# Enable Java incubator modules
+--add-modules=jdk.incubator.foreign

io.openliberty.java.internal_fat_23/run/server.env

@@ -0,0 +1,2 @@
+# Need to update the JAVA_HOME environment variable to point to your Java 23 JDK
+JAVA_HOME=/jdk/temurin/jdk23

io.openliberty.java.internal_fat_23/src/main/java/io/openliberty/java/internal/TestApp.java

@@ -0,0 +1,20 @@
+/*******************************************************************************
+ * Copyright (c) 2024 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package io.openliberty.java.internal;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.core.Application;
+
+@ApplicationPath("/")
+public class TestApp extends Application {
+}

io.openliberty.java.internal_fat_23/src/main/java/io/openliberty/java/internal/TestService.java

@@ -0,0 +1,90 @@
+/* Copyright (c) 2024 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package io.openliberty.java.internal;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import javax.enterprise.context.ApplicationScoped;
+import javax.ws.rs.GET;
+import javax.ws.rs.Path;
+
+@Path("/")
+@ApplicationScoped
+public class TestService {
+
+    private StringWriter sw = new StringWriter();
+
+    @GET
+    public String test() {
+        try {
+            log(">>> ENTER");
+            doTest();
+            log("<<< EXIT SUCCESSFUL");
+        } catch (Exception e) {
+            e.printStackTrace(System.out);
+            e.printStackTrace(new PrintWriter(sw));
+            log("<<< EXIT FAILED");
+        }
+        String result = sw.toString();
+        sw = new StringWriter();
+        return result;
+    }
+
+
+    private void doTest() throws Exception {
+        log("Beginning Java 23 testing");
+
+        double f = Math.random()/Math.nextDown(1.0);
+        int milesRun = (int)(0 * (1.0 - f) + 101*f);    // Random integer between 0 and 100
+        String comment = eval(milesRun);
+        log(comment);
+
+        if (comment == null || !comment.toLowerCase().contains("you")) {
+            log("Failed testing");
+            throw new Exception("Comment did not contain the string \"you\"!.  It was: " + comment);
+        }
+
+        log("Goodbye testing");
+    }
+
+    /**
+     * Primitive Types in Patterns, instanceof, and switch (Preview) : JEP 455 -> https://openjdk.org/jeps/455
+     * 
+     * @param miles
+     * @return
+     */
+    private static String eval(int miles) {
+        return switch (miles) {
+            case 0 -> "Are you Still sleeping?";
+            case 1 -> "You have a long ways to go...";
+            case 2 -> "Have you warmed up yet?";
+            case int i when i >= 3 && i < 8 -> "Feeling it, aren't you?";
+            case int i when i >= 8 && i < 13 -> "Pacing yourself";
+            case 13 -> "You are halfway!";
+            case int i when i >= 14 && i < 20 -> "Your legs are burning";
+            case int i when i >= 20 && i < 26 -> "You're almost there!";
+            case 26 -> "You are done!";
+            case int i when i > 26 -> "Ultra marathon runner, you are!";
+            case int i -> "Huh? Don't know what to do with value: " + i;    // default
+        };
+    }
+
+
+    public void log(String msg) {
+        System.out.println(msg);
+        sw.append(msg);
+        sw.append("<br/>");
+    }
+}

io.openliberty.java.internal_fat_23/src/main/java/io/openliberty/java/internal/package-info.java

@@ -0,0 +1,13 @@
+/*******************************************************************************
+ * Copyright (c) 2024 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package io.openliberty.java.internal;

io.openliberty.java.internal_fat_23/src/main/java/module-info.java

@@ -0,0 +1,17 @@
+/*******************************************************************************
+ * Copyright (c) 2024 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+open module io.openliberty.java.internal.basic_app {
+
+    requires java.ws.rs;
+
+}

io.openliberty.java.internal_fat_23/src/main/liberty/config/server.xml

@@ -0,0 +1,6 @@
+<server>
+    <featureManager>
+        <feature>servlet-4.0</feature>
+        <feature>jaxrs-2.1</feature>
+    </featureManager>
+</server>

settings.gradle

@@ -18,3 +18,4 @@ include 'io.openliberty.java.internal_fat_19'
 include 'io.openliberty.java.internal_fat_20'
 include 'io.openliberty.java.internal_fat_21'
 include 'io.openliberty.java.internal_fat_22'
+include 'io.openliberty.java.internal_fat_23'