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‎spring-aot/src/main/java/io/kubernetes/client/spring/aot/KubernetesBeanFactoryInitializationAotProcessor.java

Lines changed: 75 additions & 61 deletions
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@@ -1,8 +1,24 @@
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/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package io.kubernetes.client.spring.aot;
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import com.google.gson.annotations.JsonAdapter;
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import io.kubernetes.client.extended.controller.Controller;
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import io.swagger.annotations.ApiModel;
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import java.lang.annotation.Annotation;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.Set;
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import org.jetbrains.annotations.NotNull;
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import org.reflections.Reflections;
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import org.slf4j.Logger;
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import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
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import org.springframework.boot.autoconfigure.AutoConfigurationPackages;
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import java.lang.annotation.Annotation;
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import java.util.Collection;
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import java.util.HashSet;
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import java.util.Set;
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/**
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* GraalVM native images need to know about when you might reflectively work with types at runtime. The Kubernetes Java
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* client works with several types reflectively at runtime. This code uses the third-party Reflections library to
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* reflect upon all the code in your Spring Boot application or in the official Kubernetes Java client that has
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* {@link ApiModel}, {@link JsonAdapter}, and registers them. It also registers a few other specific handful of
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* classes that should be accounted for, in specific cases.
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* GraalVM native images need to know about when you might reflectively work with types at runtime.
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* The Kubernetes Java client works with several types reflectively at runtime. This code uses the
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* third-party Reflections library to reflect upon all the code in your Spring Boot application or
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* in the official Kubernetes Java client that has {@link ApiModel}, {@link JsonAdapter}, and
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* registers them. It also registers a few other specific handful of classes that should be
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* accounted for, in specific cases.
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*
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* @author Josh Long
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*/
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@SuppressWarnings("unused")
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public class KubernetesBeanFactoryInitializationAotProcessor
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implements BeanFactoryInitializationAotProcessor {
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implements BeanFactoryInitializationAotProcessor {
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private static final Logger LOGGER = LoggerFactory.getLogger(KubernetesBeanFactoryInitializationAotProcessor.class);
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private static final Logger LOGGER =
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LoggerFactory.getLogger(KubernetesBeanFactoryInitializationAotProcessor.class);
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private final MemberCategory[] allMemberCategories = MemberCategory.values();
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private final MemberCategory[] allMemberCategories = MemberCategory.values();
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@Override
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public BeanFactoryInitializationAotContribution processAheadOfTime(
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@NotNull ConfigurableListableBeanFactory beanFactory) {
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return (generationContext, beanFactoryInitializationCode) -> {
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RuntimeHints hints = generationContext.getRuntimeHints();
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String[] classNames = new String[]{
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"com.google.gson.JsonElement",//
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"io.kubernetes.client.informer.cache.ProcessorListener", //
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"io.kubernetes.client.extended.controller.Controller", //
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"io.kubernetes.client.util.generic.GenericKubernetesApi$StatusPatch", //
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"io.kubernetes.client.util.Watch$Response" //
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};
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for (String className : classNames) {
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LOGGER.info("registering " + className + " for reflection");
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hints.reflection().registerType(TypeReference.of(className), allMemberCategories);
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}
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registerForPackage("io.kubernetes", hints);
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Collection<String> packages = AutoConfigurationPackages.get(beanFactory);
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for (String packageName : packages) {
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registerForPackage(packageName, hints);
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}
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};
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}
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@Override
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public BeanFactoryInitializationAotContribution processAheadOfTime(
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@NotNull ConfigurableListableBeanFactory beanFactory) {
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return (generationContext, beanFactoryInitializationCode) -> {
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RuntimeHints hints = generationContext.getRuntimeHints();
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String[] classNames =
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new String[] {
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"com.google.gson.JsonElement", //
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"io.kubernetes.client.informer.cache.ProcessorListener", //
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"io.kubernetes.client.extended.controller.Controller", //
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"io.kubernetes.client.util.generic.GenericKubernetesApi$StatusPatch", //
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"io.kubernetes.client.util.Watch$Response" //
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};
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for (String className : classNames) {
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LOGGER.info("registering " + className + " for reflection");
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hints.reflection().registerType(TypeReference.of(className), allMemberCategories);
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}
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registerForPackage("io.kubernetes", hints);
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Collection<String> packages = AutoConfigurationPackages.get(beanFactory);
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for (String packageName : packages) {
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registerForPackage(packageName, hints);
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}
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};
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}
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private void registerForPackage(String packageName, RuntimeHints hints) {
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Reflections reflections = new Reflections(packageName);
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Set<Class<?>> apiModels = reflections.getTypesAnnotatedWith(ApiModel.class);
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Set<Class<? extends Controller>> controllers = reflections.getSubTypesOf(Controller.class);
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Set<Class<?>> jsonAdapters = findJsonAdapters(reflections);
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Set<Class<?>> all = new HashSet<>();
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all.addAll(jsonAdapters);
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all.addAll(controllers);
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all.addAll(apiModels);
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for (Class<?> clazz : all) {
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LOGGER.info("registering " + clazz.getName() + " for reflection");
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hints.reflection().registerType(clazz, allMemberCategories);
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}
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private void registerForPackage(String packageName, RuntimeHints hints) {
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Reflections reflections = new Reflections(packageName);
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Set<Class<?>> apiModels = reflections.getTypesAnnotatedWith(ApiModel.class);
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Set<Class<? extends Controller>> controllers = reflections.getSubTypesOf(Controller.class);
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Set<Class<?>> jsonAdapters = findJsonAdapters(reflections);
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Set<Class<?>> all = new HashSet<>();
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all.addAll(jsonAdapters);
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all.addAll(controllers);
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all.addAll(apiModels);
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for (Class<?> clazz : all) {
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LOGGER.info("registering " + clazz.getName() + " for reflection");
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hints.reflection().registerType(clazz, allMemberCategories);
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}
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}
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private <R extends Annotation> Set<Class<?>> findJsonAdapters(Reflections reflections) {
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Class<JsonAdapter> jsonAdapterClass = JsonAdapter.class;
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Set<Class<?>> classes = new HashSet<>();
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for (Class<?> clazz : reflections.getTypesAnnotatedWith(jsonAdapterClass)) {
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JsonAdapter annotation = clazz.getAnnotation(jsonAdapterClass);
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if (null != annotation) {
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classes.add(annotation.value());
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}
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classes.add(clazz);
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}
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return classes;
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private <R extends Annotation> Set<Class<?>> findJsonAdapters(Reflections reflections) {
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Class<JsonAdapter> jsonAdapterClass = JsonAdapter.class;
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Set<Class<?>> classes = new HashSet<>();
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for (Class<?> clazz : reflections.getTypesAnnotatedWith(jsonAdapterClass)) {
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JsonAdapter annotation = clazz.getAnnotation(jsonAdapterClass);
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if (null != annotation) {
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classes.add(annotation.value());
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}
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classes.add(clazz);
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}
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}
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return classes;
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}
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}

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