org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2012-2014 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.jdbc;
import javax.sql.DataSource;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.Ordered;
import org.springframework.core.type.AnnotationMetadata;
/**
* {@link BeanPostProcessor} used to fire {@link DataSourceInitializedEvent}s. Should only
* be registered via the inner {@link Registrar} class.
*
* @author Dave Syer
* @since 1.1.2
*/
class DataSourceInitializerPostProcessor implements BeanPostProcessor, Ordered {
private int order = Ordered.HIGHEST_PRECEDENCE;
@Override
public int getOrder() {
return this.order;
}
@Autowired
private BeanFactory beanFactory;
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName)
throws BeansException {
return bean;
}
@Override
public Object postProcessAfterInitialization(Object bean, String beanName)
throws BeansException {
if (bean instanceof DataSource) {
// force initialization of this bean as soon as we see a DataSource
this.beanFactory.getBean(DataSourceInitializer.class);
}
return bean;
}
/**
* {@link ImportBeanDefinitionRegistrar} to register the
* {@link DataSourceInitializerPostProcessor} without causing early bean instantiation
* issues.
*/
static class Registrar implements ImportBeanDefinitionRegistrar {
private static final String BEAN_NAME = "dataSourceInitializerPostProcessor";
@Override
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata,
BeanDefinitionRegistry registry) {
if (!registry.containsBeanDefinition(BEAN_NAME)) {
GenericBeanDefinition beanDefinition = new GenericBeanDefinition();
beanDefinition.setBeanClass(DataSourceInitializerPostProcessor.class);
beanDefinition.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
// We don't need this one to be post processed otherwise it can cause a
// cascade of bean instantiation that we would rather avoid.
beanDefinition.setSynthetic(true);
registry.registerBeanDefinition(BEAN_NAME, beanDefinition);
}
}
}
}