org.springframework.boot.autoconfigure.orm.jpa.DataSourceInitializedPublisher Maven / Gradle / Ivy
/*
* Copyright 2012-2017 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.orm.jpa;
import java.util.Map;
import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;
import org.springframework.beans.BeansException;
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.boot.autoconfigure.jdbc.DataSourceInitializedEvent;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
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 1.1.0
*/
class DataSourceInitializedPublisher implements BeanPostProcessor {
@Autowired
private ApplicationContext applicationContext;
private DataSource dataSource;
private JpaProperties properties;
@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) {
// Normally this will be the right DataSource
this.dataSource = (DataSource) bean;
}
if (bean instanceof JpaProperties) {
this.properties = (JpaProperties) bean;
}
if (bean instanceof EntityManagerFactory) {
publishEventIfRequired((EntityManagerFactory) bean);
}
return bean;
}
private void publishEventIfRequired(EntityManagerFactory entityManagerFactory) {
DataSource dataSource = findDataSource(entityManagerFactory);
if (dataSource != null && isInitializingDatabase(dataSource)) {
this.applicationContext
.publishEvent(new DataSourceInitializedEvent(dataSource));
}
}
private DataSource findDataSource(EntityManagerFactory entityManagerFactory) {
Object dataSource = entityManagerFactory.getProperties()
.get("javax.persistence.nonJtaDataSource");
return (dataSource != null && dataSource instanceof DataSource
? (DataSource) dataSource : this.dataSource);
}
private boolean isInitializingDatabase(DataSource dataSource) {
if (this.properties == null) {
return true; // better safe than sorry
}
Map hibernate = this.properties
.getHibernateProperties(dataSource);
if (hibernate.containsKey("hibernate.hbm2ddl.auto")) {
return true;
}
return false;
}
/**
* {@link ImportBeanDefinitionRegistrar} to register the
* {@link DataSourceInitializedPublisher} without causing early bean instantiation
* issues.
*/
static class Registrar implements ImportBeanDefinitionRegistrar {
private static final String BEAN_NAME = "dataSourceInitializedPublisher";
@Override
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata,
BeanDefinitionRegistry registry) {
if (!registry.containsBeanDefinition(BEAN_NAME)) {
GenericBeanDefinition beanDefinition = new GenericBeanDefinition();
beanDefinition.setBeanClass(DataSourceInitializedPublisher.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);
}
}
}
}