Add Java 22 test source

.gitignore

@@ -1,8 +1,5 @@
 # Ignore gradle files and folders at the root
 /.gradle/
-/gradle/
-/gradlew
-/gradlew.bat
 
 # Ignore bin folders at the root of each project
 /*/bin/

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -145,15 +145,15 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -202,11 +202,11 @@ fi
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
-# Collect all arguments for the java command;
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
-#     shell script including quotes and variable substitutions, so put them in
-#     double quotes to make sure that they get re-expanded; and
-#   * put everything else in single quotes, so that it's not re-expanded.
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \

io.openliberty.java.internal_fat_22/.gitignore

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

io.openliberty.java.internal_fat_22/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_22: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 22):
+
+- In **build.gradle**, set:
+
+```
+   languageVersion = JavaLanguageVersion.of(22)
+```
+
+- And then set the environment variable JDK22 to your Java 22 JDK home, for example:
+
+```
+(Mac)      export JDK22="/path/to/your/jdk22/home"
+(Unix)     JDK22="/path/to/your/jdk22/home"
+(Win DOS)  set JDK22="C:\path\to\your\jdk22\home"
+(Win PS)   $env:JDK22="C:\path\to\your\jdk22\home"
+```
+
+- To build the WAR file locally, from the root directory of the open-liberty-misc repository run:
+
+```
+./gradlew io.openliberty.java.internal_fat_22:build -P"org.gradle.java.installations.fromEnv=JDK22"
+```
+where **JDK22** is a system environment variable that reflects the location of your Java 22 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_22/'
+
+    <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_22/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(22)
+  }
+}
+
+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_22/'
+}

io.openliberty.java.internal_fat_22/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_22/run/server.env

@@ -0,0 +1,2 @@
+# Need to update the JAVA_HOME environment variable to point to your Java 22 JDK
+JAVA_HOME=/jdk/temurin/jdk22

io.openliberty.java.internal_fat_22/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_22/src/main/java/io/openliberty/java/internal/TestService.java

@@ -0,0 +1,80 @@
+/*******************************************************************************
+ * 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 22 testing");
+        ArrayList<String> favoriteShows = new ArrayList<String>(Arrays.asList("Outpost","Grimm","Community","Scrubs","Castle","Star Trek"));
+        int count = countElements(favoriteShows);
+
+        if (count != favoriteShows.size()) {
+            log("Failed testing");
+            throw new Exception("Number of elements counted in ArrayList (" + count + ") is not equal to the size (" + favoriteShows.size() + ")!");
+        }
+
+        log("Goodbye testing");
+    }
+
+    /**
+     * Demonstrate unnamed variables : JEP 456 -> https://openjdk.org/jeps/456
+     * 
+     * @param shows
+     * @return
+     */
+    public int countElements(ArrayList<String> list) {
+        int total = 0;
+        for (var _ : list) {    // Use _ for unnamed variable
+            total++;
+        }
+        return total;
+    }
+
+
+    public void log(String msg) {
+        System.out.println(msg);
+        sw.append(msg);
+        sw.append("<br/>");
+    }
+}

io.openliberty.java.internal_fat_22/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_22/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_22/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

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2021, 2023 IBM Corporation and others.
+ * Copyright (c) 2021, 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
@@ -17,3 +17,4 @@ include 'io.openliberty.java.internal_fat_18'
 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'