Disable the Kafka Connector graceful shutdown in dev mode

extensions/smallrye-reactive-messaging-kafka/deployment/src/main/java/io/quarkus/smallrye/reactivemessaging/kafka/deployment/SmallRyeReactiveMessagingKafkaProcessor.java

@@ -1,5 +1,6 @@
 package io.quarkus.smallrye.reactivemessaging.kafka.deployment;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.function.BiConsumer;
@@ -22,9 +23,11 @@
 import io.quarkus.deployment.annotations.Consume;
 import io.quarkus.deployment.builditem.CombinedIndexBuildItem;
 import io.quarkus.deployment.builditem.FeatureBuildItem;
+import io.quarkus.deployment.builditem.LaunchModeBuildItem;
 import io.quarkus.deployment.builditem.RunTimeConfigurationDefaultBuildItem;
 import io.quarkus.deployment.builditem.RuntimeConfigSetupCompleteBuildItem;
 import io.quarkus.deployment.builditem.nativeimage.ReflectiveClassBuildItem;
+import io.quarkus.smallrye.reactivemessaging.kafka.ReactiveMessagingKafkaConfig;
 import io.vertx.kafka.client.consumer.impl.KafkaReadStreamImpl;
 
 public class SmallRyeReactiveMessagingKafkaProcessor {
@@ -46,18 +49,41 @@ public void build(BuildProducer<ReflectiveClassBuildItem> reflectiveClass) {
                         .build());
     }
 
+    /**
+     * Handles the serializer/deserializer detection and whether or not the graceful shutdown should be used in dev mode.
+     */
     @BuildStep
-    public void defaultSerdeConfig(ReactiveMessagingKafkaBuildTimeConfig buildTimeConfig,
+    public void defaultChannelConfiguration(
+            LaunchModeBuildItem launchMode,
+            ReactiveMessagingKafkaBuildTimeConfig buildTimeConfig,
+            ReactiveMessagingKafkaConfig runtimeConfig,
             CombinedIndexBuildItem combinedIndex,
             BuildProducer<RunTimeConfigurationDefaultBuildItem> defaultConfigProducer) {
 
-        if (!buildTimeConfig.serializerAutodetectionEnabled) {
-            return;
-        }
-
         DefaultSerdeDiscoveryState discoveryState = new DefaultSerdeDiscoveryState(combinedIndex.getIndex());
+        if (buildTimeConfig.serializerAutodetectionEnabled) {
+            discoverDefaultSerdeConfig(discoveryState, defaultConfigProducer);
+        }
 
-        discoverDefaultSerdeConfig(discoveryState, defaultConfigProducer);
+        if (launchMode.getLaunchMode().isDevOrTest()) {
+            if (!runtimeConfig.enableGracefulShutdownInDevAndTestMode) {
+                List<AnnotationInstance> incomings = discoveryState.findAnnotationsOnMethods(DotNames.INCOMING);
+                List<AnnotationInstance> channels = discoveryState.findAnnotationsOnInjectionPoints(DotNames.CHANNEL);
+                List<AnnotationInstance> annotations = new ArrayList<>();
+                annotations.addAll(incomings);
+                annotations.addAll(channels);
+                for (AnnotationInstance annotation : annotations) {
+                    String channelName = annotation.value().asString();
+                    if (!discoveryState.isKafkaConnector(true, channelName)) {
+                        continue;
+                    }
+                    String key = "mp.messaging.incoming." + channelName + ".graceful-shutdown";
+                    discoveryState.ifNotYetConfigured(key, () -> {
+                        defaultConfigProducer.produce(new RunTimeConfigurationDefaultBuildItem(key, "false"));
+                    });
+                }
+            }
+        }
     }
 
     // visible for testing

extensions/smallrye-reactive-messaging-kafka/runtime/src/main/java/io/quarkus/smallrye/reactivemessaging/kafka/ReactiveMessagingKafkaConfig.java

@@ -0,0 +1,19 @@
+package io.quarkus.smallrye.reactivemessaging.kafka;
+
+import org.eclipse.microprofile.config.inject.ConfigProperty;
+
+import io.quarkus.runtime.annotations.ConfigRoot;
+
+@ConfigRoot(name = "reactive-messaging.kafka")
+public class ReactiveMessagingKafkaConfig {
+
+    /**
+     * Enables the graceful shutdown in dev and test modes.
+     * The graceful shutdown waits until the inflight records have been processed and the offset committed to Kafka.
+     * While this setting is highly recommended in production, in dev and test modes, it's disabled by default.
+     * This setting allows to re-enable it.
+     */
+    @ConfigProperty(defaultValue = "false")
+    public boolean enableGracefulShutdownInDevAndTestMode;
+
+}