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/*
 * 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
 *
 *      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.jta.bitronix;

import javax.transaction.TransactionManager;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.core.Ordered;

/**
 * {@link BeanFactoryPostProcessor} to automatically register the recommended
 * {@link ConfigurableListableBeanFactory#registerDependentBean(String, String)
 * dependencies} for correct Bitronix shutdown ordering. With Bitronix it appears that
 * ConnectionFactory and DataSource beans must be shutdown before the
 * {@link TransactionManager}.
 *
 * @author Phillip Webb
 * @since 1.2.0
 */
public class BitronixDependentBeanFactoryPostProcessor
		implements BeanFactoryPostProcessor, Ordered {

	private static final String[] NO_BEANS = {};

	private int order = Ordered.LOWEST_PRECEDENCE;

	@Override
	public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
			throws BeansException {
		String[] transactionManagers = beanFactory
				.getBeanNamesForType(TransactionManager.class, true, false);
		for (String transactionManager : transactionManagers) {
			addTransactionManagerDependencies(beanFactory, transactionManager);
		}
	}

	private void addTransactionManagerDependencies(
			ConfigurableListableBeanFactory beanFactory, String transactionManager) {
		for (String dependentBeanName : getBeanNamesForType(beanFactory,
				"javax.jms.ConnectionFactory")) {
			beanFactory.registerDependentBean(transactionManager, dependentBeanName);
		}
		for (String dependentBeanName : getBeanNamesForType(beanFactory,
				"javax.sql.DataSource")) {
			beanFactory.registerDependentBean(transactionManager, dependentBeanName);
		}
	}

	private String[] getBeanNamesForType(ConfigurableListableBeanFactory beanFactory,
			String type) {
		try {
			return beanFactory.getBeanNamesForType(Class.forName(type), true, false);
		}
		catch (ClassNotFoundException | NoClassDefFoundError ex) {
			// Ignore
		}
		return NO_BEANS;
	}

	@Override
	public int getOrder() {
		return this.order;
	}

	public void setOrder(int order) {
		this.order = order;
	}

}




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