For Native compilation getTaskRepository for SimpleTaskAC has to be narrowed

it has to be set to the specific SimpleTaskRepository
Removed proxy-target-class flag from demos.

Added comments for which hints can be removed

spring-cloud-task-batch/src/main/java/org/springframework/cloud/task/batch/configuration/TaskBatchRuntimeHints.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2022-2022 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.task.batch.configuration;
+
+import org.springframework.aop.SpringProxy;
+import org.springframework.aop.framework.Advised;
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.RuntimeHintsRegistrar;
+import org.springframework.aot.hint.TypeReference;
+import org.springframework.core.DecoratingProxy;
+
+/**
+ * Native Hints for Spring Cloud Task Batch.
+ *
+ * To be removed when batch adds its hints.
+ *
+ * @author Glenn Renfro
+ * @since 3.0
+ */
+public class TaskBatchRuntimeHints implements RuntimeHintsRegistrar {
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+
+		hints.resources().registerPattern("org/springframework/batch/core/schema-h2.sql");
+
+		hints.proxies()
+				.registerJdkProxy(builder -> builder
+						.proxiedInterfaces(TypeReference.of("org.springframework.batch.core.repository.JobRepository"))
+						.proxiedInterfaces(SpringProxy.class, Advised.class, DecoratingProxy.class));
+
+	}
+
+}

spring-cloud-task-batch/src/main/resources/META-INF/spring/aot.factories

@@ -0,0 +1,2 @@
+org.springframework.aot.hint.RuntimeHintsRegistrar=\
+org.springframework.cloud.task.batch.configuration.TaskBatchRuntimeHints

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/configuration/SimpleTaskAutoConfiguration.java

@@ -33,6 +33,7 @@ import org.springframework.cloud.task.repository.TaskExplorer;
 import org.springframework.cloud.task.repository.TaskNameResolver;
 import org.springframework.cloud.task.repository.TaskRepository;
 import org.springframework.cloud.task.repository.support.SimpleTaskNameResolver;
+import org.springframework.cloud.task.repository.support.SimpleTaskRepository;
 import org.springframework.cloud.task.repository.support.TaskRepositoryInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
@@ -80,8 +81,8 @@ public class SimpleTaskAutoConfiguration {
 	private TaskExplorer taskExplorer;
 
 	@Bean
-	public TaskRepository taskRepository() {
-		return this.taskRepository;
+	public SimpleTaskRepository taskRepository() {
+		return (SimpleTaskRepository) this.taskRepository;
 	}
 
 	@Bean

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/configuration/TaskRuntimeHints.java

@@ -24,9 +24,12 @@ import org.springframework.aot.hint.MemberCategory;
 import org.springframework.aot.hint.RuntimeHints;
 import org.springframework.aot.hint.RuntimeHintsRegistrar;
 import org.springframework.aot.hint.TypeReference;
+import org.springframework.aot.hint.support.RuntimeHintsUtils;
+import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.cloud.task.repository.TaskExplorer;
 import org.springframework.cloud.task.repository.TaskRepository;
 import org.springframework.core.DecoratingProxy;
+import org.springframework.core.annotation.SynthesizedAnnotation;
 import org.springframework.util.ClassUtils;
 
 /**
@@ -52,11 +55,16 @@ public class TaskRuntimeHints implements RuntimeHintsRegistrar {
 				TypeReference.of("org.springframework.boot.jdbc.init.DataSourceScriptDatabaseInitializer"),
 				hint -> hint.withMembers(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
 						MemberCategory.INVOKE_DECLARED_METHODS));
+
 		hints.proxies().registerJdkProxy(builder -> builder.proxiedInterfaces(TaskRepository.class)
 				.proxiedInterfaces(SpringProxy.class, Advised.class, DecoratingProxy.class));
 		hints.proxies().registerJdkProxy(builder -> builder.proxiedInterfaces(TaskExplorer.class)
 				.proxiedInterfaces(SpringProxy.class, Advised.class, DecoratingProxy.class));
 
+		// Remove Qualifier hints once SCSt can be natively compiled.
+		hints.reflection().registerType(Qualifier.class, RuntimeHintsUtils.ANNOTATION_HINT);
+		hints.proxies().registerJdkProxy(Qualifier.class, SynthesizedAnnotation.class);
+
 		if (!ClassUtils.isPresent("com.zaxxer.hikari.HikariDataSource", classLoader)) {
 			return;
 		}

spring-cloud-task-samples/task-events/pom.xml

@@ -58,6 +58,10 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+		</dependency>
 	</dependencies>
 
 	<build>

spring-cloud-task-samples/task-events/src/main/resources/application.properties

@@ -1,3 +1,4 @@
 spring.application.name=Event Emitting Task
 logging.level.org.springframework.cloud.stream=DEBUG
 logging.level.org.springframework.cloud.task=DEBUG
+

spring-cloud-task-samples/timestamp/src/main/resources/application.properties

@@ -1,4 +1,4 @@
 spring.application.name=Demo Timestamp Task
 logging.level.org.springframework.cloud.task=DEBUG
-spring.aop.proxy-target-class=false
+#spring.aop.proxy-target-class=false