org.springframework.boot.autoconfigure.SharedMetadataReaderFactoryContextInitializer Maven / Gradle / Ivy
/*
* Copyright 2012-2016 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
*
* http://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.autoconfigure;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.boot.type.classreading.ConcurrentReferenceCachingMetadataReaderFactory;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ApplicationListener;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigUtils;
import org.springframework.context.annotation.ConfigurationClassPostProcessor;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.Ordered;
import org.springframework.core.PriorityOrdered;
import org.springframework.core.type.classreading.CachingMetadataReaderFactory;
import org.springframework.core.type.classreading.MetadataReaderFactory;
/**
* {@link ApplicationContextInitializer} to create a shared
* {@link CachingMetadataReaderFactory} between the
* {@link ConfigurationClassPostProcessor} and Spring Boot.
*
* @author Phillip Webb
* @since 1.4.0
*/
class SharedMetadataReaderFactoryContextInitializer
implements ApplicationContextInitializer {
public static final String BEAN_NAME = "org.springframework.boot.autoconfigure."
+ "internalCachingMetadataReaderFactory";
@Override
public void initialize(ConfigurableApplicationContext applicationContext) {
applicationContext.addBeanFactoryPostProcessor(
new CachingMetadataReaderFactoryPostProcessor());
}
/**
* {@link BeanDefinitionRegistryPostProcessor} to register the
* {@link CachingMetadataReaderFactory} and configure the
* {@link ConfigurationClassPostProcessor}.
*/
private static class CachingMetadataReaderFactoryPostProcessor
implements BeanDefinitionRegistryPostProcessor, PriorityOrdered {
@Override
public int getOrder() {
// Must happen before the ConfigurationClassPostProcessor is created
return Ordered.HIGHEST_PRECEDENCE;
}
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
throws BeansException {
}
@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry)
throws BeansException {
register(registry);
configureConfigurationClassPostProcessor(registry);
}
private void register(BeanDefinitionRegistry registry) {
RootBeanDefinition definition = new RootBeanDefinition(
SharedMetadataReaderFactoryBean.class);
registry.registerBeanDefinition(BEAN_NAME, definition);
}
private void configureConfigurationClassPostProcessor(
BeanDefinitionRegistry registry) {
try {
BeanDefinition definition = registry.getBeanDefinition(
AnnotationConfigUtils.CONFIGURATION_ANNOTATION_PROCESSOR_BEAN_NAME);
definition.getPropertyValues().add("metadataReaderFactory",
new RuntimeBeanReference(BEAN_NAME));
}
catch (NoSuchBeanDefinitionException ex) {
}
}
}
/**
* {@link FactoryBean} to create the shared {@link MetadataReaderFactory}.
*/
static class SharedMetadataReaderFactoryBean
implements FactoryBean,
BeanClassLoaderAware, ApplicationListener {
private ConcurrentReferenceCachingMetadataReaderFactory metadataReaderFactory;
@Override
public void setBeanClassLoader(ClassLoader classLoader) {
this.metadataReaderFactory = new ConcurrentReferenceCachingMetadataReaderFactory(
classLoader);
}
@Override
public ConcurrentReferenceCachingMetadataReaderFactory getObject()
throws Exception {
return this.metadataReaderFactory;
}
@Override
public Class getObjectType() {
return CachingMetadataReaderFactory.class;
}
@Override
public boolean isSingleton() {
return true;
}
@Override
public void onApplicationEvent(ContextRefreshedEvent event) {
this.metadataReaderFactory.clearCache();
}
}
}