Drop SharedMetadataReaderFactoryContextInitializer

Closes gh-47687

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/SharedMetadataReaderFactoryContextInitializer.java

@@ -33,7 +33,6 @@ import org.springframework.beans.factory.support.BeanDefinitionBuilder;
 import org.springframework.beans.factory.support.BeanDefinitionRegistry;
 import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
 import org.springframework.beans.factory.support.RegisteredBean;
-import org.springframework.boot.type.classreading.ConcurrentReferenceCachingMetadataReaderFactory;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ApplicationListener;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -187,20 +186,19 @@ class SharedMetadataReaderFactoryContextInitializer implements
 	/**
 	 * {@link FactoryBean} to create the shared {@link MetadataReaderFactory}.
 	 */
-	static class SharedMetadataReaderFactoryBean
-			implements FactoryBean<ConcurrentReferenceCachingMetadataReaderFactory>, ResourceLoaderAware,
-			ApplicationListener<ContextRefreshedEvent> {
+	static class SharedMetadataReaderFactoryBean implements FactoryBean<CachingMetadataReaderFactory>,
+			ResourceLoaderAware, ApplicationListener<ContextRefreshedEvent> {
 
 		@SuppressWarnings("NullAway.Init")
-		private ConcurrentReferenceCachingMetadataReaderFactory metadataReaderFactory;
+		private CachingMetadataReaderFactory metadataReaderFactory;
 
 		@Override
 		public void setResourceLoader(ResourceLoader resourceLoader) {
-			this.metadataReaderFactory = new ConcurrentReferenceCachingMetadataReaderFactory(resourceLoader);
+			this.metadataReaderFactory = new CachingMetadataReaderFactory(resourceLoader);
 		}
 
 		@Override
-		public ConcurrentReferenceCachingMetadataReaderFactory getObject() throws Exception {
+		public CachingMetadataReaderFactory getObject() throws Exception {
 			return this.metadataReaderFactory;
 		}
 

core/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/SharedMetadataReaderFactoryContextInitializerTests.java

@@ -28,11 +28,11 @@ import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProce
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.autoconfigure.SharedMetadataReaderFactoryContextInitializer.CachingMetadataReaderFactoryPostProcessor;
-import org.springframework.boot.type.classreading.ConcurrentReferenceCachingMetadataReaderFactory;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.annotation.AnnotationConfigUtils;
 import org.springframework.context.annotation.ConfigurationClassPostProcessor;
 import org.springframework.context.support.GenericApplicationContext;
+import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
 import org.springframework.test.util.ReflectionTestUtils;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -83,7 +83,7 @@ class SharedMetadataReaderFactoryContextInitializerTests {
 		assertThat(bean).isSameAs(configurationAnnotationPostProcessor);
 		then(configurationAnnotationPostProcessor).should()
 			.setMetadataReaderFactory(assertArg((metadataReaderFactory) -> assertThat(metadataReaderFactory)
-				.isInstanceOf(ConcurrentReferenceCachingMetadataReaderFactory.class)));
+				.isInstanceOf(CachingMetadataReaderFactory.class)));
 	}
 
 	static class TestConfig {

core/spring-boot/src/main/java/org/springframework/boot/type/classreading/ConcurrentReferenceCachingMetadataReaderFactory.java

@@ -1,109 +0,0 @@
-/*
- * Copyright 2012-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.boot.type.classreading;
-
-import java.io.IOException;
-import java.util.Map;
-
-import org.springframework.core.io.Resource;
-import org.springframework.core.io.ResourceLoader;
-import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
-import org.springframework.core.type.classreading.MetadataReader;
-import org.springframework.core.type.classreading.MetadataReaderFactory;
-import org.springframework.core.type.classreading.SimpleMetadataReaderFactory;
-import org.springframework.util.ConcurrentReferenceHashMap;
-
-/**
- * Caching implementation of the {@link MetadataReaderFactory} interface backed by a
- * {@link ConcurrentReferenceHashMap}, caching {@link MetadataReader} per Spring
- * {@link Resource} handle (i.e. per ".class" file).
- *
- * @author Phillip Webb
- * @since 1.4.0
- * @see CachingMetadataReaderFactory
- */
-public class ConcurrentReferenceCachingMetadataReaderFactory extends SimpleMetadataReaderFactory {
-
-	private final Map<String, MetadataReader> classNameCache = new ConcurrentReferenceHashMap<>();
-
-	private final Map<Resource, MetadataReader> resourceCache = new ConcurrentReferenceHashMap<>();
-
-	/**
-	 * Create a new {@link ConcurrentReferenceCachingMetadataReaderFactory} instance for
-	 * the default class loader.
-	 */
-	public ConcurrentReferenceCachingMetadataReaderFactory() {
-	}
-
-	/**
-	 * Create a new {@link ConcurrentReferenceCachingMetadataReaderFactory} instance for
-	 * the given resource loader.
-	 * @param resourceLoader the Spring ResourceLoader to use (also determines the
-	 * ClassLoader to use)
-	 */
-	public ConcurrentReferenceCachingMetadataReaderFactory(ResourceLoader resourceLoader) {
-		super(resourceLoader);
-	}
-
-	/**
-	 * Create a new {@link ConcurrentReferenceCachingMetadataReaderFactory} instance for
-	 * the given class loader.
-	 * @param classLoader the ClassLoader to use
-	 */
-	public ConcurrentReferenceCachingMetadataReaderFactory(ClassLoader classLoader) {
-		super(classLoader);
-	}
-
-	@Override
-	public MetadataReader getMetadataReader(String className) throws IOException {
-		MetadataReader metadataReader = this.classNameCache.get(className);
-		if (metadataReader == null) {
-			metadataReader = super.getMetadataReader(className);
-			this.classNameCache.put(className, metadataReader);
-		}
-		return metadataReader;
-	}
-
-	@Override
-	public MetadataReader getMetadataReader(Resource resource) throws IOException {
-		MetadataReader metadataReader = this.resourceCache.get(resource);
-		if (metadataReader == null) {
-			metadataReader = createMetadataReader(resource);
-			this.resourceCache.put(resource, metadataReader);
-		}
-		return metadataReader;
-	}
-
-	/**
-	 * Create the meta-data reader.
-	 * @param resource the source resource.
-	 * @return the meta-data reader
-	 * @throws IOException on error
-	 */
-	protected MetadataReader createMetadataReader(Resource resource) throws IOException {
-		return super.getMetadataReader(resource);
-	}
-
-	/**
-	 * Clear the entire MetadataReader cache, removing all cached class metadata.
-	 */
-	public void clearCache() {
-		this.classNameCache.clear();
-		this.resourceCache.clear();
-	}
-
-}

core/spring-boot/src/main/java/org/springframework/boot/type/classreading/package-info.java

@@ -1,23 +0,0 @@
-/*
- * Copyright 2012-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.
- */
-
-/**
- * Support classes for reading annotation and class-level metadata.
- */
-@NullMarked
-package org.springframework.boot.type.classreading;
-
-import org.jspecify.annotations.NullMarked;

core/spring-boot/src/test/java/org/springframework/boot/type/classreading/ConcurrentReferenceCachingMetadataReaderFactoryTests.java

@@ -1,69 +0,0 @@
-/*
- * Copyright 2012-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.boot.type.classreading;
-
-import org.junit.jupiter.api.Test;
-
-import org.springframework.core.io.Resource;
-import org.springframework.core.type.classreading.MetadataReader;
-
-import static org.assertj.core.api.Assertions.assertThat;
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.BDDMockito.then;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.times;
-
-/**
- * Tests for {@link ConcurrentReferenceCachingMetadataReaderFactory}.
- *
- * @author Phillip Webb
- */
-class ConcurrentReferenceCachingMetadataReaderFactoryTests {
-
-	@Test
-	void getMetadataReaderUsesCache() throws Exception {
-		TestConcurrentReferenceCachingMetadataReaderFactory factory = spy(
-				new TestConcurrentReferenceCachingMetadataReaderFactory());
-		MetadataReader metadataReader1 = factory.getMetadataReader(getClass().getName());
-		MetadataReader metadataReader2 = factory.getMetadataReader(getClass().getName());
-		assertThat(metadataReader1).isSameAs(metadataReader2);
-		then(factory).should().createMetadataReader(any(Resource.class));
-	}
-
-	@Test
-	void clearResetsCache() throws Exception {
-		TestConcurrentReferenceCachingMetadataReaderFactory factory = spy(
-				new TestConcurrentReferenceCachingMetadataReaderFactory());
-		MetadataReader metadataReader1 = factory.getMetadataReader(getClass().getName());
-		factory.clearCache();
-		MetadataReader metadataReader2 = factory.getMetadataReader(getClass().getName());
-		assertThat(metadataReader1).isNotSameAs(metadataReader2);
-		then(factory).should(times(2)).createMetadataReader(any(Resource.class));
-	}
-
-	static class TestConcurrentReferenceCachingMetadataReaderFactory
-			extends ConcurrentReferenceCachingMetadataReaderFactory {
-
-		@Override
-		public MetadataReader createMetadataReader(Resource resource) {
-			return mock(MetadataReader.class);
-		}
-
-	}
-
-}