org.springframework.integration.transaction.DefaultTransactionSynchronizationFactory.java Source code

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Here is the source code for org.springframework.integration.transaction.DefaultTransactionSynchronizationFactory.java

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/*
 * Copyright 2002-2012 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.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.transaction.support.ResourceHolderSynchronization;
import org.springframework.transaction.support.TransactionSynchronization;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.springframework.util.Assert;

/**
 * Default implementation of {@link TransactionSynchronizationFactory} which takes an instance of
 * {@link TransactionSynchronizationProcessor} allowing you to create a {@link TransactionSynchronization}
 * using {{@link #create(Object)} method.
 *
 * @author Gary Russell
 * @author Oleg Zhurakousky
 * @since 2.2
 */
public class DefaultTransactionSynchronizationFactory implements TransactionSynchronizationFactory {

    private final Log logger = LogFactory.getLog(getClass());

    private final TransactionSynchronizationProcessor processor;

    public DefaultTransactionSynchronizationFactory(TransactionSynchronizationProcessor processor) {
        Assert.notNull(processor, "'processor' must not be null");
        this.processor = processor;
    }

    public TransactionSynchronization create(Object key) {
        Assert.notNull(key, "'key' must not be null");
        Object resourceHolder = TransactionSynchronizationManager.getResource(key);
        Assert.isInstanceOf(IntegrationResourceHolder.class, resourceHolder);
        return new DefaultTransactionalResourceSynchronization((IntegrationResourceHolder) resourceHolder, key);
    }

    /**
     */
    private class DefaultTransactionalResourceSynchronization
            extends ResourceHolderSynchronization<IntegrationResourceHolder, Object> {

        private final IntegrationResourceHolder resourceHolder;

        public DefaultTransactionalResourceSynchronization(IntegrationResourceHolder resourceHolder,
                Object resourceKey) {
            super(resourceHolder, resourceKey);
            this.resourceHolder = resourceHolder;
        }

        @Override
        public void beforeCommit(boolean readOnly) {
            if (logger.isTraceEnabled()) {
                logger.trace("'pre-Committing' transactional resource");
            }
            processor.processBeforeCommit(resourceHolder);
        }

        @Override
        protected boolean shouldReleaseBeforeCompletion() {
            return false;
        }

        @Override
        protected void processResourceAfterCommit(IntegrationResourceHolder resourceHolder) {

            if (logger.isTraceEnabled()) {
                logger.trace("'Committing' transactional resource");
            }

            processor.processAfterCommit(resourceHolder);

        }

        @Override
        public void afterCompletion(int status) {
            if (status != TransactionSynchronization.STATUS_COMMITTED) {
                if (logger.isTraceEnabled()) {
                    logger.trace("'Rolling back' transactional resource");
                }

                processor.processAfterRollback(resourceHolder);

            }
            super.afterCompletion(status);
        }
    }

}