org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration Maven / Gradle / Ivy
/*
* Copyright 2012-2019 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.autoconfigure;
import org.springframework.beans.factory.SmartInitializingSingleton;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.SearchStrategy;
import org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata;
import org.springframework.boot.context.properties.ConfigurationPropertiesBindingPostProcessor;
import org.springframework.cloud.context.properties.ConfigurationPropertiesBeans;
import org.springframework.cloud.context.properties.ConfigurationPropertiesRebinder;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* Auto-configuration for {@link ConfigurationPropertiesRebinder}.
*
* @author Dave Syer
*/
@Configuration
@ConditionalOnBean(ConfigurationPropertiesBindingPostProcessor.class)
public class ConfigurationPropertiesRebinderAutoConfiguration
implements ApplicationContextAware, SmartInitializingSingleton {
private ApplicationContext context;
@Override
public void setApplicationContext(ApplicationContext applicationContext) {
this.context = applicationContext;
}
@Bean
@ConditionalOnMissingBean(search = SearchStrategy.CURRENT)
public ConfigurationPropertiesBeans configurationPropertiesBeans() {
// Since this is a BeanPostProcessor we have to be super careful not to
// cause a cascade of bean instantiation. Knowing the *name* of the beans we
// need is super optimal, but a little brittle (unfortunately we have no
// choice).
ConfigurationBeanFactoryMetadata metaData = this.context.getBean(
ConfigurationBeanFactoryMetadata.BEAN_NAME,
ConfigurationBeanFactoryMetadata.class);
ConfigurationPropertiesBeans beans = new ConfigurationPropertiesBeans();
beans.setBeanMetaDataStore(metaData);
return beans;
}
@Bean
@ConditionalOnMissingBean(search = SearchStrategy.CURRENT)
public ConfigurationPropertiesRebinder configurationPropertiesRebinder(
ConfigurationPropertiesBeans beans) {
ConfigurationPropertiesRebinder rebinder = new ConfigurationPropertiesRebinder(
beans);
return rebinder;
}
@Override
public void afterSingletonsInstantiated() {
// After all beans are initialized explicitly rebind beans from the parent
// so that changes during the initialization of the current context are
// reflected. In particular this can be important when low level services like
// decryption are bootstrapped in the parent, but need to change their
// configuration before the child context is processed.
if (this.context.getParent() != null) {
// TODO: make this optional? (E.g. when creating child contexts that prefer to
// be isolated.)
ConfigurationPropertiesRebinder rebinder = this.context
.getBean(ConfigurationPropertiesRebinder.class);
for (String name : this.context.getParent().getBeanDefinitionNames()) {
rebinder.rebind(name);
}
}
}
}