Add GraalVM native image support for Fabric8 autoconfig module

spring-cloud-kubernetes-fabric8-autoconfig/src/main/java/org/springframework/cloud/kubernetes/fabric8/Fabric8RuntimeHints.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright 2013-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.cloud.kubernetes.fabric8;
+
+import io.fabric8.kubernetes.api.model.ConfigMap;
+import io.fabric8.kubernetes.api.model.ConfigMapList;
+import io.fabric8.kubernetes.api.model.ObjectMeta;
+import io.fabric8.kubernetes.api.model.Secret;
+import io.fabric8.kubernetes.api.model.SecretList;
+import io.fabric8.kubernetes.client.Config;
+import io.fabric8.kubernetes.client.ConfigBuilder;
+import io.fabric8.kubernetes.client.KubernetesClientBuilder;
+import io.fabric8.kubernetes.client.impl.KubernetesClientImpl;
+
+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.cloud.kubernetes.commons.config.ConfigMapConfigProperties;
+import org.springframework.cloud.kubernetes.commons.config.SecretsConfigProperties;
+
+/**
+ * {@link RuntimeHintsRegistrar} for Spring Cloud Kubernetes Fabric8 native image support.
+ *
+ * <p>
+ * Registers reflection hints required for GraalVM native image compilation when using the
+ * Fabric8 Kubernetes client with Spring Cloud Kubernetes.
+ *
+ * @author Abu Hena Mostafa Kamal
+ * @since 5.0.3
+ */
+public class Fabric8RuntimeHints implements RuntimeHintsRegistrar {
+
+	@Override
+	public void registerHints(RuntimeHints hints, ClassLoader classLoader) {
+		// ===== FABRIC8 CLIENT CLASSES =====
+		// Fabric8 client impl - loaded reflectively via KubernetesClientBuilder
+		hints.reflection()
+			.registerType(TypeReference.of(KubernetesClientImpl.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.INVOKE_DECLARED_METHODS, MemberCategory.ACCESS_DECLARED_FIELDS);
+
+		// KubernetesClientBuilder - used in Fabric8AutoConfiguration
+		hints.reflection()
+			.registerType(TypeReference.of(KubernetesClientBuilder.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.INVOKE_DECLARED_METHODS);
+
+		// Fabric8 Config - used in Fabric8AutoConfiguration
+		hints.reflection()
+			.registerType(TypeReference.of(Config.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.INVOKE_DECLARED_METHODS, MemberCategory.ACCESS_DECLARED_FIELDS);
+
+		// ConfigBuilder - used in Fabric8AutoConfiguration.kubernetesClientConfig()
+		hints.reflection()
+			.registerType(TypeReference.of(ConfigBuilder.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.INVOKE_DECLARED_METHODS);
+
+		// ===== KUBERNETES RESOURCES (CRITICAL FOR CONFIGMAP READING) =====
+		// ConfigMap - the actual resource being read
+		hints.reflection()
+			.registerType(TypeReference.of(ConfigMap.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.ACCESS_DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS);
+
+		// ConfigMapList - for listing ConfigMaps
+		hints.reflection()
+			.registerType(TypeReference.of(ConfigMapList.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.ACCESS_DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS);
+
+		// ObjectMeta - metadata for all Kubernetes resources
+		hints.reflection()
+			.registerType(TypeReference.of(ObjectMeta.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.ACCESS_DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS);
+
+		// Secret - if using secrets
+		hints.reflection()
+			.registerType(TypeReference.of(Secret.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.ACCESS_DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS);
+
+		hints.reflection()
+			.registerType(TypeReference.of(SecretList.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
+					MemberCategory.ACCESS_DECLARED_FIELDS, MemberCategory.INVOKE_DECLARED_METHODS);
+
+		hints.reflection()
+			.registerType(TypeReference.of(ConfigMapConfigProperties.class),
+					MemberCategory.INVOKE_DECLARED_CONSTRUCTORS);
+
+		hints.reflection()
+			.registerType(TypeReference.of(SecretsConfigProperties.class), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS);
+
+		// ===== RESOURCE HINTS =====
+		// Kubernetes service account and Fabric8 service files
+		hints.resources().registerPattern("classpath*:META-INF/services/io.fabric8.kubernetes.client.*");
+
+		hints.resources().registerPattern("classpath*:META-INF/fabric8/*");
+	}
+
+}

spring-cloud-kubernetes-fabric8-autoconfig/src/main/resources/META-INF/spring/aot.factories

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+org.springframework.aot.hint.RuntimeHintsRegistrar=\
+org.springframework.cloud.kubernetes.fabric8.Fabric8RuntimeHints

spring-cloud-kubernetes-fabric8-autoconfig/src/test/java/org/springframework/cloud/kubernetes/fabric8/Fabric8RuntimeHintsTests.java

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+/*
+ * Copyright 2013-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.cloud.kubernetes.fabric8;
+
+import io.fabric8.kubernetes.api.model.ConfigMap;
+import io.fabric8.kubernetes.api.model.ConfigMapList;
+import io.fabric8.kubernetes.api.model.ObjectMeta;
+import io.fabric8.kubernetes.api.model.Secret;
+import io.fabric8.kubernetes.api.model.SecretList;
+import io.fabric8.kubernetes.client.Config;
+import io.fabric8.kubernetes.client.ConfigBuilder;
+import io.fabric8.kubernetes.client.KubernetesClientBuilder;
+import io.fabric8.kubernetes.client.impl.KubernetesClientImpl;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.aot.hint.RuntimeHints;
+import org.springframework.aot.hint.predicate.RuntimeHintsPredicates;
+import org.springframework.cloud.kubernetes.commons.config.ConfigMapConfigProperties;
+import org.springframework.cloud.kubernetes.commons.config.SecretsConfigProperties;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link Fabric8RuntimeHints}.
+ *
+ * @author Abu Hena Mostafa Kamal
+ * @since 5.0.3
+ */
+class Fabric8RuntimeHintsTests {
+
+	private final Fabric8RuntimeHints hintsRegistrar = new Fabric8RuntimeHints();
+
+	@Test
+	void fabric8ClientClassesShouldBeRegistered() {
+		RuntimeHints hints = new RuntimeHints();
+		hintsRegistrar.registerHints(hints, null);
+
+		assertThat(RuntimeHintsPredicates.reflection().onType(KubernetesClientImpl.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(KubernetesClientBuilder.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(Config.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(ConfigBuilder.class)).accepts(hints);
+	}
+
+	@Test
+	void kubernetesResourcesShouldBeRegistered() {
+		RuntimeHints hints = new RuntimeHints();
+		hintsRegistrar.registerHints(hints, null);
+
+		assertThat(RuntimeHintsPredicates.reflection().onType(ConfigMap.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(ConfigMapList.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(ObjectMeta.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(Secret.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(SecretList.class)).accepts(hints);
+	}
+
+	@Test
+	void configPropertiesShouldBeRegistered() {
+		RuntimeHints hints = new RuntimeHints();
+		hintsRegistrar.registerHints(hints, null);
+
+		assertThat(RuntimeHintsPredicates.reflection().onType(ConfigMapConfigProperties.class)).accepts(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(SecretsConfigProperties.class)).accepts(hints);
+	}
+
+	@Test
+	void unrelatedClassesShouldNotBeRegistered() {
+		RuntimeHints hints = new RuntimeHints();
+		hintsRegistrar.registerHints(hints, null);
+
+		assertThat(RuntimeHintsPredicates.reflection().onType(String.class)).rejects(hints);
+		assertThat(RuntimeHintsPredicates.reflection().onType(Integer.class)).rejects(hints);
+	}
+
+}