Prevent AOT code generation for Reactive repositories.

Closes: #1611

Author: christophstrobl

spring-data-cassandra/src/main/java/org/springframework/data/cassandra/repository/config/CassandraRepositoryConfigurationExtension.java

@@ -133,6 +133,10 @@ public static class CassandraRepositoryRegistrationAotProcessor extends Reposito
 				return null;
 			}
 
+			if(repositoryContext.getRepositoryInformation().isReactiveRepository()) {
+				return null;
+			}
+
 			return new CassandraRepositoryContributor(repositoryContext);
 		}
 

spring-data-cassandra/src/test/java/org/springframework/data/cassandra/repository/config/CassandraRepositoryRegistrationAotProcessorUnitTests.java

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2025-present 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.data.cassandra.repository.config;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.DefaultBeanNameGenerator;
+import org.springframework.beans.factory.support.DefaultListableBeanFactory;
+import org.springframework.core.env.StandardEnvironment;
+import org.springframework.core.io.DefaultResourceLoader;
+import org.springframework.core.type.AnnotationMetadata;
+import org.springframework.data.cassandra.repository.aot.TestCassandraAotRepositoryContext;
+import org.springframework.data.cassandra.repository.config.CassandraRepositoryConfigurationExtension.CassandraRepositoryRegistrationAotProcessor;
+import org.springframework.data.repository.config.AnnotationRepositoryConfigurationSource;
+import org.springframework.data.repository.core.support.RepositoryComposition;
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
+
+/**
+ * @author Christoph Strobl
+ */
+class CassandraRepositoryRegistrationAotProcessorUnitTests {
+
+	@Test // GH-1611
+	void shouldNotAttemptToProcessReactiveRepository() {
+
+		AnnotationRepositoryConfigurationSource configSource = new AnnotationRepositoryConfigurationSource(
+			AnnotationMetadata.introspect(ReactiveCassandraRepositoryConfiguration.class), EnableReactiveCassandraRepositories.class, new DefaultResourceLoader(),
+			new StandardEnvironment(), Mockito.mock(BeanDefinitionRegistry.class), DefaultBeanNameGenerator.INSTANCE);
+
+		TestCassandraAotRepositoryContext<?> context = new TestCassandraAotRepositoryContext<>(new DefaultListableBeanFactory(), ReactiveCassandraRepo.class, RepositoryComposition.empty(), configSource);
+
+		CassandraRepositoryRegistrationAotProcessor processor = new CassandraRepositoryRegistrationAotProcessor();
+		assertThat(processor.contributeAotRepository(context)).isNull();
+	}
+
+	interface ReactiveCassandraRepo extends ReactiveCrudRepository<SampleEntity, Long> {
+
+	}
+
+	static class SampleEntity {
+
+	}
+
+	@EnableReactiveCassandraRepositories
+	static class ReactiveCassandraRepositoryConfiguration {
+
+	}
+}