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This module implements readers/writers/... using no more than JavaEE APIs. The mani constraint is to not use more than JavaEE but not depend on it for features (= be usable in J2SE).

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.batchee.extras.transaction.integration;

import java.util.logging.Level;
import java.util.logging.Logger;

public final class Synchronizations {
    private static final Logger LOGGER = Logger.getLogger(Synchronizations.class.getName());

    public static final SynchronizationService DELEGATE;
    public static final boolean ACTIVE;
    static {
        boolean active = true;
        SynchronizationService service;
        try {
            Synchronizations.class.getClassLoader().loadClass("javax.transaction.UserTransaction");
            service = new JTASynchronizationService("java:comp/TransactionSynchronizationRegistry");
        } catch (final Throwable e) { // NoClassDefFoundError or ClassNotFoundException
            // this is an expected case for most of components using this abstraction
            LOGGER.info("UserTransaction or TransactionSynchronizationRegistry not found, Transactional* components will ignore transactionanility");
            if (LOGGER.isLoggable(Level.CONFIG)) {
                LOGGER.log(Level.SEVERE, "UserTransaction or TransactionSynchronizationRegistry not found, Transactional* components will not work", e);
            }
            active = false;
            service = new NoopSynchronizationService();
        }
        ACTIVE = active;
        DELEGATE = service;
    }

    private Synchronizations() {
        // no-op
    }

    public static void registerSynchronization(final SynchronizationService.Synchronization s) {
        DELEGATE.registerSynchronization(s);
    }

    public static boolean hasTransaction() {
        return DELEGATE.hasTransaction();
    }

    public static void put(final Object key, final Object value) {
        DELEGATE.put(key, value);
    }

    public static Object get(Object key) {
        return DELEGATE.get(key);
    }
}