Runtime init the cleaner instance in ResourceCleaner

Inject an accessor for the ResourceCleaner.CLEANER static variable so
that the associated cleaner won't get initialized at build time.

Closes: quarkusio#31440

extensions/resteasy-classic/resteasy-common/runtime/src/main/java/io/quarkus/resteasy/common/runtime/graal/ResourceCleanerReplacement.java

@@ -0,0 +1,44 @@
+package io.quarkus.resteasy.common.runtime.graal;
+
+import java.lang.ref.Cleaner;
+
+import com.oracle.svm.core.annotate.Alias;
+import com.oracle.svm.core.annotate.InjectAccessors;
+import com.oracle.svm.core.annotate.TargetClass;
+
+/**
+ * For GraalVM native we runtime-inject the Cleaner instance via an injected
+ * accessor. This awkward pattern over say, the initialize on demand holder
+ * pattern, is necessary so that the Graal compiler doesn't inline the accessor
+ * itself.
+ */
+@TargetClass(className = "org.jboss.resteasy.spi.ResourceCleaner")
+public final class ResourceCleanerReplacement {
+
+ @Alias
+ @InjectAccessors(CleanerAccessor.class) //
+ private static Cleaner CLEANER;
+
+ static class CleanerAccessor {
+ private static volatile Cleaner INSTANCE;
+
+ static Cleaner get() {
+ Cleaner result = INSTANCE;
+ if (result == null) {
+ // lazily initialize instance
+ result = initializeOnce();
+ }
+ return result;
+ }
+
+ private static synchronized Cleaner initializeOnce() {
+ if (INSTANCE == null) {
+ // double checked locking is ok as INSTANCE is volatile
+ INSTANCE = Cleaner.create();
+ }
+ return INSTANCE;
+ }
+
+ }
+
+}