/*
* Copyright 2014-2016 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.integration.transaction;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.core.BeanFactoryMessageChannelDestinationResolver;
import org.springframework.messaging.core.DestinationResolver;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* The {@link FactoryBean} implementation (with {@code Builder} style) to be used
* from JavaConfig to populate {@link DefaultTransactionSynchronizationFactory} bean.
*
* @author Artem Bilan
* @since 4.0
*/
public class TransactionSynchronizationFactoryBean implements FactoryBean<DefaultTransactionSynchronizationFactory>,
BeanFactoryAware {
private final SpelExpressionParser PARSER = new SpelExpressionParser();
private BeanFactory beanFactory;
private volatile String beforeCommitExpression;
private volatile String afterCommitExpression;
private volatile String afterRollbackExpression;
private volatile MessageChannel beforeCommitChannel;
private volatile String beforeCommitChannelName;
private volatile MessageChannel afterCommitChannel;
private volatile String afterCommitChannelName;
private volatile MessageChannel afterRollbackChannel;
private volatile String afterRollbackChannelName;
private volatile DestinationResolver<MessageChannel> channelResolver;
@Override
public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
this.beanFactory = beanFactory;
}
/**
* Specify the {@link DestinationResolver} strategy to use.
* The default is a BeanFactoryChannelResolver.
* @param channelResolver The channel resolver.
* @return current TransactionSynchronizationFactoryBean
* @since 4.1.3
*/
public TransactionSynchronizationFactoryBean channelResolver(DestinationResolver<MessageChannel> channelResolver) {
Assert.notNull(channelResolver, "'channelResolver' must not be null");
this.channelResolver = channelResolver;
return this;
}
public TransactionSynchronizationFactoryBean beforeCommit(String expression) {
return beforeCommit(expression, this.beforeCommitChannel);
}
public TransactionSynchronizationFactoryBean beforeCommit(String expression, String messageChannel) {
Assert.state(StringUtils.hasText(expression) || StringUtils.hasText(messageChannel),
"At least one attribute ('expression' and/or 'messageChannel') must be defined");
this.beforeCommitExpression = expression;
this.beforeCommitChannelName = messageChannel;
this.beforeCommitChannel = null;
return this;
}
public TransactionSynchronizationFactoryBean beforeCommit(MessageChannel messageChannel) {
return beforeCommit(this.beforeCommitExpression, messageChannel);
}
public TransactionSynchronizationFactoryBean beforeCommit(String expression, MessageChannel messageChannel) {
Assert.state(StringUtils.hasText(expression) || messageChannel != null,
"At least one attribute ('expression' and/or 'messageChannel') must be defined");
this.beforeCommitExpression = expression;
this.beforeCommitChannel = messageChannel;
this.beforeCommitChannelName = null;
return this;
}
public TransactionSynchronizationFactoryBean afterCommit(String expression) {
return afterCommit(expression, this.afterCommitChannel);
}
public TransactionSynchronizationFactoryBean afterCommit(String expression, String messageChannel) {
Assert.state(StringUtils.hasText(expression) || StringUtils.hasText(messageChannel),
"At least one attribute ('expression' and/or 'messageChannel') must be defined");
this.afterCommitExpression = expression;
this.afterCommitChannelName = messageChannel;
this.afterCommitChannel = null;
return this;
}
public TransactionSynchronizationFactoryBean afterCommit(MessageChannel messageChannel) {
return afterCommit(this.afterCommitExpression, messageChannel);
}
public TransactionSynchronizationFactoryBean afterCommit(String expression, MessageChannel messageChannel) {
Assert.state(StringUtils.hasText(expression) || messageChannel != null,
"At least one attribute ('expression' and/or 'messageChannel') must be defined");
this.afterCommitExpression = expression;
this.afterCommitChannel = messageChannel;
this.afterCommitChannelName = null;
return this;
}
public TransactionSynchronizationFactoryBean afterRollback(String expression) {
return afterRollback(expression, this.afterRollbackChannel);
}
public TransactionSynchronizationFactoryBean afterRollback(String expression, String messageChannel) {
Assert.state(StringUtils.hasText(expression) || StringUtils.hasText(messageChannel),
"At least one attribute ('expression' and/or 'messageChannel') must be defined");
this.afterRollbackExpression = expression;
this.afterRollbackChannelName = messageChannel;
this.afterRollbackChannel = null;
return this;
}
public TransactionSynchronizationFactoryBean afterRollback(MessageChannel messageChannel) {
return afterRollback(this.afterRollbackExpression, messageChannel);
}
public TransactionSynchronizationFactoryBean afterRollback(String expression, MessageChannel messageChannel) {
Assert.state(StringUtils.hasText(expression) || messageChannel != null,
"At least one attribute ('expression' and/or 'messageChannel') must be defined");
this.afterRollbackExpression = expression;
this.afterRollbackChannel = messageChannel;
this.afterRollbackChannelName = null;
return this;
}
@Override
public DefaultTransactionSynchronizationFactory getObject() throws Exception {
if (this.channelResolver == null) {
this.channelResolver = new BeanFactoryMessageChannelDestinationResolver(this.beanFactory);
}
ExpressionEvaluatingTransactionSynchronizationProcessor processor =
new ExpressionEvaluatingTransactionSynchronizationProcessor();
if (StringUtils.hasText(this.beforeCommitExpression)) {
processor.setBeforeCommitExpression(this.PARSER.parseExpression(this.beforeCommitExpression));
}
if (StringUtils.hasText(this.afterCommitExpression)) {
processor.setAfterCommitExpression(this.PARSER.parseExpression(this.afterCommitExpression));
}
if (StringUtils.hasText(this.afterRollbackExpression)) {
processor.setAfterRollbackExpression(this.PARSER.parseExpression(this.afterRollbackExpression));
}
if (StringUtils.hasText(this.beforeCommitChannelName)) {
this.beforeCommitChannel = this.channelResolver.resolveDestination(this.beforeCommitChannelName);
}
if (this.beforeCommitChannel != null) {
processor.setBeforeCommitChannel(this.beforeCommitChannel);
}
if (StringUtils.hasText(this.afterCommitChannelName)) {
this.afterCommitChannel = this.channelResolver.resolveDestination(this.afterCommitChannelName);
}
if (this.afterCommitChannel != null) {
processor.setAfterCommitChannel(this.afterCommitChannel);
}
if (StringUtils.hasText(this.afterRollbackChannelName)) {
this.afterRollbackChannel = this.channelResolver.resolveDestination(this.afterRollbackChannelName);
}
if (this.afterRollbackChannel != null) {
processor.setAfterRollbackChannel(this.afterRollbackChannel);
}
if (this.beanFactory instanceof AutowireCapableBeanFactory) {
((AutowireCapableBeanFactory) this.beanFactory).initializeBean(processor, null);
}
return new DefaultTransactionSynchronizationFactory(processor);
}
@Override
public Class<?> getObjectType() {
return DefaultTransactionSynchronizationFactory.class;
}
@Override
public boolean isSingleton() {
return true;
}
}