Add a cleanup SPI for the REST Client

extensions/resteasy-reactive/rest-client-jackson/deployment/src/main/java/io/quarkus/rest/client/reactive/jackson/deployment/RestClientReactiveJacksonProcessor.java

@@ -10,6 +10,7 @@
 import jakarta.ws.rs.core.MediaType;
 
 import org.jboss.jandex.DotName;
+import org.jboss.resteasy.reactive.client.impl.RestClientClosingTask;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 
@@ -18,10 +19,12 @@
 import io.quarkus.deployment.annotations.BuildProducer;
 import io.quarkus.deployment.annotations.BuildStep;
 import io.quarkus.deployment.builditem.FeatureBuildItem;
+import io.quarkus.deployment.builditem.nativeimage.ServiceProviderBuildItem;
 import io.quarkus.rest.client.reactive.deployment.AnnotationToRegisterIntoClientContextBuildItem;
 import io.quarkus.rest.client.reactive.jackson.ClientObjectMapper;
 import io.quarkus.rest.client.reactive.jackson.runtime.serialisers.ClientJacksonMessageBodyReader;
 import io.quarkus.rest.client.reactive.jackson.runtime.serialisers.ClientJacksonMessageBodyWriter;
+import io.quarkus.rest.client.reactive.jackson.runtime.serialisers.JacksonCleanupRestClientClosingTask;
 import io.quarkus.resteasy.reactive.jackson.deployment.processor.ResteasyReactiveJacksonProviderDefinedBuildItem;
 import io.quarkus.resteasy.reactive.jackson.runtime.serialisers.vertx.VertxJsonArrayBasicMessageBodyReader;
 import io.quarkus.resteasy.reactive.jackson.runtime.serialisers.vertx.VertxJsonArrayBasicMessageBodyWriter;
@@ -116,4 +119,10 @@ void additionalProviders(
                                 .setRuntimeType(RuntimeType.CLIENT)
                                 .build());
     }
+
+    @BuildStep
+    void nativeSupport(BuildProducer<ServiceProviderBuildItem> serviceProviderProducer) {
+        serviceProviderProducer.produce(new ServiceProviderBuildItem(RestClientClosingTask.class.getName(),
+                JacksonCleanupRestClientClosingTask.class.getName()));
+    }
 }

extensions/resteasy-reactive/rest-client-jackson/runtime/src/main/java/io/quarkus/rest/client/reactive/jackson/runtime/serialisers/JacksonCleanupRestClientClosingTask.java

@@ -0,0 +1,17 @@
+package io.quarkus.rest.client.reactive.jackson.runtime.serialisers;
+
+import org.jboss.resteasy.reactive.client.impl.RestClientClosingTask;
+
+import io.quarkus.rest.client.reactive.jackson.ClientObjectMapper;
+
+/**
+ * Cleans up the mappings that is needed to support {@link ClientObjectMapper}
+ */
+public class JacksonCleanupRestClientClosingTask implements RestClientClosingTask {
+
+    @Override
+    public void close(Context context) {
+        JacksonUtil.contextResolverMap
+                .remove(new ResolverMapKey(context.baseTarget().getConfiguration(), context.restApiClass()));
+    }
+}

extensions/resteasy-reactive/rest-client-jackson/runtime/src/main/java/io/quarkus/rest/client/reactive/jackson/runtime/serialisers/JacksonUtil.java

@@ -14,7 +14,7 @@
 
 final class JacksonUtil {
 
-    private static final ConcurrentMap<ResolverMapKey, ObjectMapper> contextResolverMap = new ConcurrentHashMap<>();
+    static final ConcurrentMap<ResolverMapKey, ObjectMapper> contextResolverMap = new ConcurrentHashMap<>();
 
     private JacksonUtil() {
     }

extensions/resteasy-reactive/rest-client-jackson/runtime/src/main/resources/META-INF/services/org.jboss.resteasy.reactive.client.impl.RestClientClosingTask

@@ -0,0 +1 @@
+io.quarkus.rest.client.reactive.jackson.runtime.serialisers.JacksonCleanupRestClientClosingTask

extensions/resteasy-reactive/rest-client-jaxrs/deployment/src/main/java/io/quarkus/jaxrs/client/reactive/deployment/JaxrsClientReactiveProcessor.java

@@ -89,6 +89,7 @@
 import org.jboss.resteasy.reactive.client.impl.ClientBuilderImpl;
 import org.jboss.resteasy.reactive.client.impl.ClientImpl;
 import org.jboss.resteasy.reactive.client.impl.MultiInvoker;
+import org.jboss.resteasy.reactive.client.impl.RestClientClosingTask;
 import org.jboss.resteasy.reactive.client.impl.SseEventSourceBuilderImpl;
 import org.jboss.resteasy.reactive.client.impl.StorkClientRequestFilter;
 import org.jboss.resteasy.reactive.client.impl.UniInvoker;
@@ -1214,6 +1215,15 @@ A more full example of generated client (with sub-resource) can is at the bottom
                     .getMethodCreator(MethodDescriptor.ofMethod(Closeable.class, "close", void.class));
             ResultHandle webTarget = closeCreator.readInstanceField(baseTargetField, closeCreator.getThis());
             ResultHandle webTargetImpl = closeCreator.checkCast(webTarget, WebTargetImpl.class);
+            ResultHandle restApiClass = closeCreator.loadClassFromTCCL(restClientInterface.getClassName());
+            ResultHandle context = closeCreator.newInstance(
+                    MethodDescriptor.ofConstructor(RestClientClosingTask.Context.class, Class.class, WebTargetImpl.class),
+                    restApiClass,
+                    webTargetImpl);
+            closeCreator.invokeStaticInterfaceMethod(
+                    MethodDescriptor.ofMethod(RestClientClosingTask.class, "invokeAll", void.class,
+                            RestClientClosingTask.Context.class),
+                    context);
             ResultHandle restClient = closeCreator.invokeVirtualMethod(
                     MethodDescriptor.ofMethod(WebTargetImpl.class, "getRestClient", ClientImpl.class), webTargetImpl);
             closeCreator.invokeVirtualMethod(MethodDescriptor.ofMethod(ClientImpl.class, "close", void.class), restClient);

independent-projects/resteasy-reactive/client/runtime/src/main/java/org/jboss/resteasy/reactive/client/impl/RestClientClosingTask.java

@@ -0,0 +1,30 @@
+package org.jboss.resteasy.reactive.client.impl;
+
+import java.util.ServiceLoader;
+
+import org.jboss.logging.Logger;
+
+/**
+ * This represents a task that will be called by the implementation class of the REST Client when the {@code close}
+ * method is called.
+ */
+public interface RestClientClosingTask {
+
+    Logger log = Logger.getLogger(RestClientClosingTask.class);
+
+    void close(Context context);
+
+    record Context(Class<?> restApiClass, WebTargetImpl baseTarget) {
+    }
+
+    @SuppressWarnings("unused") // this is called by the implementation class of the REST Client when the {@code close} method is called
+    static void invokeAll(Context context) {
+        for (RestClientClosingTask restClientClosingTask : ServiceLoader.load(RestClientClosingTask.class)) {
+            try {
+                restClientClosingTask.close(context);
+            } catch (Exception e) {
+                log.warn("Error running RestClientClosingTask", e);
+            }
+        }
+    }
+}