Merge pull request #25776 from geoand/loom-warnings

Improve virtual thread related validation in RESTEasy Reactive

core/deployment/src/main/java/io/quarkus/deployment/pkg/builditem/CompiledJavaVersionBuildItem.java

@@ -30,6 +30,8 @@ public interface JavaVersion {
 
         Status isJava17OrHigher();
 
+        Status isJava19OrHigher();
+
         enum Status {
             TRUE,
             FALSE,
@@ -57,12 +59,18 @@ public Status isJava11OrHigher() {
             public Status isJava17OrHigher() {
                 return Status.UNKNOWN;
             }
+
+            @Override
+            public Status isJava19OrHigher() {
+                return Status.UNKNOWN;
+            }
         }
 
         final class Known implements JavaVersion {
 
             private static final int JAVA_11_MAJOR = 55;
             private static final int JAVA_17_MAJOR = 61;
+            private static final int JAVA_19_MAJOR = 63;
 
             private final int determinedMajor;
 
@@ -85,6 +93,11 @@ public Status isJava17OrHigher() {
                 return higherOrEqualStatus(JAVA_17_MAJOR);
             }
 
+            @Override
+            public Status isJava19OrHigher() {
+                return higherOrEqualStatus(JAVA_19_MAJOR);
+            }
+
             private Status higherOrEqualStatus(int javaMajor) {
                 return determinedMajor >= javaMajor ? Status.TRUE : Status.FALSE;
             }

core/deployment/src/main/java/io/quarkus/deployment/steps/CompiledJavaVersionBuildStep.java

@@ -23,6 +23,10 @@ public class CompiledJavaVersionBuildStep {
      */
     @BuildStep
     public CompiledJavaVersionBuildItem compiledJavaVersion(BuildSystemTargetBuildItem buildSystemTarget) {
+        if ((buildSystemTarget.getOutputDirectory() == null) || (!Files.exists(buildSystemTarget.getOutputDirectory()))) {
+            // needed for Arquillian TCK tests
+            return CompiledJavaVersionBuildItem.unknown();
+        }
         AtomicReference<Integer> majorVersion = new AtomicReference<>(null);
         try {
             Files.walkFileTree(buildSystemTarget.getOutputDirectory(), new SimpleFileVisitor<>() {

extensions/resteasy-reactive/quarkus-resteasy-reactive/deployment/src/main/java/io/quarkus/resteasy/reactive/server/deployment/ResteasyReactiveProcessor.java

@@ -58,6 +58,7 @@
 import org.jboss.resteasy.reactive.common.processor.DefaultProducesHandler;
 import org.jboss.resteasy.reactive.common.processor.EndpointIndexer;
 import org.jboss.resteasy.reactive.common.processor.ResteasyReactiveDotNames;
+import org.jboss.resteasy.reactive.common.processor.TargetJavaVersion;
 import org.jboss.resteasy.reactive.common.processor.scanning.ApplicationScanningResult;
 import org.jboss.resteasy.reactive.common.processor.scanning.ResourceScanningResult;
 import org.jboss.resteasy.reactive.common.processor.transformation.AnnotationsTransformer;
@@ -117,6 +118,7 @@
 import io.quarkus.deployment.builditem.nativeimage.ReflectiveClassBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.ReflectiveHierarchyBuildItem;
 import io.quarkus.deployment.configuration.ConfigurationError;
+import io.quarkus.deployment.pkg.builditem.CompiledJavaVersionBuildItem;
 import io.quarkus.deployment.recording.RecorderContext;
 import io.quarkus.gizmo.ClassCreator;
 import io.quarkus.gizmo.MethodCreator;
@@ -359,6 +361,7 @@ public void setupEndpoints(ApplicationIndexBuildItem applicationIndexBuildItem,
             List<MethodScannerBuildItem> methodScanners,
             List<AnnotationsTransformerBuildItem> annotationTransformerBuildItems,
             List<ContextTypeBuildItem> contextTypeBuildItems,
+            CompiledJavaVersionBuildItem compiledJavaVersionBuildItem,
             Capabilities capabilities)
             throws NoSuchMethodException {
 
@@ -514,7 +517,28 @@ private boolean hasAnnotation(MethodInfo method, short paramPosition, DotName an
                                 }
                             })
                             .setResteasyReactiveRecorder(recorder)
-                            .setApplicationClassPredicate(applicationClassPredicate);
+                            .setApplicationClassPredicate(applicationClassPredicate)
+                            .setTargetJavaVersion(new TargetJavaVersion() {
+
+                                private final Status result;
+
+                                {
+                                    CompiledJavaVersionBuildItem.JavaVersion.Status status = compiledJavaVersionBuildItem
+                                            .getJavaVersion().isJava19OrHigher();
+                                    if (status == CompiledJavaVersionBuildItem.JavaVersion.Status.FALSE) {
+                                        result = Status.FALSE;
+                                    } else if (status == CompiledJavaVersionBuildItem.JavaVersion.Status.TRUE) {
+                                        result = Status.TRUE;
+                                    } else {
+                                        result = Status.UNKNOWN;
+                                    }
+                                }
+
+                                @Override
+                                public Status isJava19OrHigher() {
+                                    return result;
+                                }
+                            });
 
             if (!serverDefaultProducesHandlers.isEmpty()) {
                 List<DefaultProducesHandler> handlers = new ArrayList<>(serverDefaultProducesHandlers.size());

independent-projects/resteasy-reactive/common/processor/src/main/java/org/jboss/resteasy/reactive/common/processor/EndpointIndexer.java

@@ -118,6 +118,7 @@
 import org.jboss.resteasy.reactive.common.model.ParameterType;
 import org.jboss.resteasy.reactive.common.model.ResourceClass;
 import org.jboss.resteasy.reactive.common.model.ResourceMethod;
+import org.jboss.resteasy.reactive.common.processor.TargetJavaVersion.Status;
 import org.jboss.resteasy.reactive.common.processor.scanning.ApplicationScanningResult;
 import org.jboss.resteasy.reactive.common.processor.transformation.AnnotationStore;
 import org.jboss.resteasy.reactive.common.processor.transformation.AnnotationsTransformer;
@@ -159,6 +160,8 @@ public abstract class EndpointIndexer<T extends EndpointIndexer<T, PARAM, METHOD
     public static final String METHOD_CONTEXT_ANNOTATION_STORE = "ANNOTATION_STORE";
     public static final String METHOD_PRODUCES = "METHOD_PRODUCES";
 
+    private static final boolean JDK_SUPPORTS_VIRTUAL_THREADS;
+
     static {
         Map<String, String> prims = new HashMap<>();
         prims.put(byte.class.getName(), Byte.class.getName());
@@ -195,6 +198,14 @@ public abstract class EndpointIndexer<T extends EndpointIndexer<T, PARAM, METHOD
         supportedReaderJavaTps.put(BIG_DECIMAL, BigDecimal.class);
         supportedReaderJavaTps.put(BIG_INTEGER, BigInteger.class);
         supportedReaderJavaTypes = Collections.unmodifiableMap(supportedReaderJavaTps);
+
+        boolean isJDKCompatible = true;
+        try {
+            Class.forName("java.lang.ThreadBuilders");
+        } catch (ClassNotFoundException e) {
+            isJDKCompatible = false;
+        }
+        JDK_SUPPORTS_VIRTUAL_THREADS = isJDKCompatible;
     }
 
     protected final IndexView index;
@@ -217,6 +228,7 @@ public abstract class EndpointIndexer<T extends EndpointIndexer<T, PARAM, METHOD
     private final Set<DotName> contextTypes;
     private final MultipartReturnTypeIndexerExtension multipartReturnTypeIndexerExtension;
     private final MultipartParameterIndexerExtension multipartParameterIndexerExtension;
+    private final TargetJavaVersion targetJavaVersion;
 
     protected EndpointIndexer(Builder<T, ?, METHOD> builder) {
         this.index = builder.index;
@@ -238,6 +250,7 @@ protected EndpointIndexer(Builder<T, ?, METHOD> builder) {
         this.contextTypes = builder.contextTypes;
         this.multipartReturnTypeIndexerExtension = builder.multipartReturnTypeIndexerExtension;
         this.multipartParameterIndexerExtension = builder.multipartParameterIndexerExtension;
+        this.targetJavaVersion = builder.targetJavaVersion;
     }
 
     public Optional<ResourceClass> createEndpoints(ClassInfo classInfo, boolean considerApplication) {
@@ -700,20 +713,6 @@ private String getAnnotationValueAsString(AnnotationTarget target, DotName annot
 
     private boolean isRunOnVirtualThread(MethodInfo info, BlockingDefault defaultValue) {
         boolean isRunOnVirtualThread = false;
-        boolean isJDKCompatible = true;
-        try {
-            Class.forName("java.lang.ThreadBuilders");
-        } catch (ClassNotFoundException e) {
-            isJDKCompatible = false;
-        }
-
-        if (!isJDKCompatible) {
-            log.warn("Your version of the JDK is '" + Runtime.version() +
-                    "' and doesn't support Loom's virtual threads" +
-                    ", your runtime will have to use jdk-19-loom or superior to leverage virtual threads " +
-                    "(else java platform threads will be used instead).");
-        }
-
         Map.Entry<AnnotationTarget, AnnotationInstance> runOnVirtualThreadAnnotation = getInheritableAnnotation(info,
                 RUN_ON_VIRTUAL_THREAD);
 
@@ -725,6 +724,15 @@ private boolean isRunOnVirtualThread(MethodInfo info, BlockingDefault defaultVal
         }
 
         if (runOnVirtualThreadAnnotation != null) {
+            if (!JDK_SUPPORTS_VIRTUAL_THREADS) {
+                throw new DeploymentException("Method '" + info.name() + "' of class '" + info.declaringClass().name()
+                        + "' uses @RunOnVirtualThread but the JDK version '" + Runtime.version() +
+                        "' and doesn't support virtual threads");
+            }
+            if (targetJavaVersion.isJava19OrHigher() == Status.FALSE) {
+                throw new DeploymentException("Method '" + info.name() + "' of class '" + info.declaringClass().name()
+                        + "' uses @RunOnVirtualThread but the target JDK version doesn't support virtual threads. Please configure your build tool to target Java 19 or above");
+            }
             isRunOnVirtualThread = true;
         }
 
@@ -1403,6 +1411,7 @@ public boolean handleMultipartForReturnType(AdditionalWriters additionalWriters,
             public void handleMultipartParameter(ClassInfo multipartClassInfo, IndexView indexView) {
             }
         };
+        private TargetJavaVersion targetJavaVersion = new TargetJavaVersion.Unknown();
 
         public B setMultipartReturnTypeIndexerExtension(MultipartReturnTypeIndexerExtension multipartReturnTypeHandler) {
             this.multipartReturnTypeIndexerExtension = multipartReturnTypeHandler;
@@ -1504,6 +1513,11 @@ public B setApplicationScanningResult(ApplicationScanningResult applicationScann
             return (B) this;
         }
 
+        public B setTargetJavaVersion(TargetJavaVersion targetJavaVersion) {
+            this.targetJavaVersion = targetJavaVersion;
+            return (B) this;
+        }
+
         public abstract T build();
     }
 

independent-projects/resteasy-reactive/common/processor/src/main/java/org/jboss/resteasy/reactive/common/processor/TargetJavaVersion.java

@@ -0,0 +1,28 @@
+package org.jboss.resteasy.reactive.common.processor;
+
+/**
+ * Used to determine the java version of the compiled Java code
+ */
+public interface TargetJavaVersion {
+
+    Status isJava19OrHigher();
+
+    enum Status {
+        TRUE,
+        FALSE,
+        UNKNOWN
+    }
+
+    final class Unknown implements TargetJavaVersion {
+
+        public static final Unknown INSTANCE = new Unknown();
+
+        Unknown() {
+        }
+
+        @Override
+        public Status isJava19OrHigher() {
+            return Status.UNKNOWN;
+        }
+    }
+}