org.springframework.batch.support.transaction.ResourcelessTransactionManager.java Source code

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Here is the source code for org.springframework.batch.support.transaction.ResourcelessTransactionManager.java

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/*
 * Copyright 2006-2007 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.batch.support.transaction;

import java.util.ArrayList;
import java.util.List;

import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionException;
import org.springframework.transaction.support.AbstractPlatformTransactionManager;
import org.springframework.transaction.support.DefaultTransactionStatus;
import org.springframework.transaction.support.TransactionSynchronizationManager;

@SuppressWarnings("serial")
public class ResourcelessTransactionManager extends AbstractPlatformTransactionManager {

    @Override
    protected void doBegin(Object transaction, TransactionDefinition definition) throws TransactionException {
        ((ResourcelessTransaction) transaction).begin();
    }

    @Override
    protected void doCommit(DefaultTransactionStatus status) throws TransactionException {
        if (logger.isDebugEnabled()) {
            logger.debug("Committing resourceless transaction on [" + status.getTransaction() + "]");
        }
    }

    @Override
    protected Object doGetTransaction() throws TransactionException {
        Object transaction = new ResourcelessTransaction();
        List<Object> resources;
        if (!TransactionSynchronizationManager.hasResource(this)) {
            resources = new ArrayList<>();
            TransactionSynchronizationManager.bindResource(this, resources);
        } else {
            @SuppressWarnings("unchecked")
            List<Object> stack = (List<Object>) TransactionSynchronizationManager.getResource(this);
            resources = stack;
        }
        resources.add(transaction);
        return transaction;
    }

    @Override
    protected void doRollback(DefaultTransactionStatus status) throws TransactionException {
        if (logger.isDebugEnabled()) {
            logger.debug("Rolling back resourceless transaction on [" + status.getTransaction() + "]");
        }
    }

    @Override
    protected boolean isExistingTransaction(Object transaction) throws TransactionException {
        if (TransactionSynchronizationManager.hasResource(this)) {
            List<?> stack = (List<?>) TransactionSynchronizationManager.getResource(this);
            return stack.size() > 1;
        }
        return ((ResourcelessTransaction) transaction).isActive();
    }

    @Override
    protected void doSetRollbackOnly(DefaultTransactionStatus status) throws TransactionException {
    }

    @Override
    protected void doCleanupAfterCompletion(Object transaction) {
        List<?> resources = (List<?>) TransactionSynchronizationManager.getResource(this);
        resources.clear();
        TransactionSynchronizationManager.unbindResource(this);
        ((ResourcelessTransaction) transaction).clear();
    }

    private static class ResourcelessTransaction {

        private boolean active = false;

        public boolean isActive() {
            return active;
        }

        public void begin() {
            active = true;
        }

        public void clear() {
            active = false;
        }

    }

}