org.molasdin.wbase.batis.transaction.BatisTransactionProvider.java Source code

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Here is the source code for org.molasdin.wbase.batis.transaction.BatisTransactionProvider.java

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/*
 * Copyright 2014 Bersenev Dmitry molasdin@outlook.com
 *
 * 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.molasdin.wbase.batis.transaction;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.tuple.Pair;
import org.apache.ibatis.session.Configuration;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.TransactionIsolationLevel;
import org.molasdin.wbase.batis.support.BasicBatisEngine;
import org.molasdin.wbase.batis.support.BatisEngine;
import org.molasdin.wbase.transaction.*;
import org.molasdin.wbase.transaction.profiles.ProfilesManager;
import org.molasdin.wbase.transaction.profiles.TransactionProfile;

/**
 * Created by dbersenev on 21.10.2014.
 */
public class BatisTransactionProvider<M> extends AbstractTransactionProvider<BatisEngine<M>> {
    private SqlSessionFactory sessionFactory;
    private Class<M> mapperClass;

    public BatisTransactionProvider() {
    }

    public BatisTransactionProvider(SqlSessionFactory sessionFactory, Class<M> mapperClass) {
        this.sessionFactory = sessionFactory;
        this.mapperClass = mapperClass;
    }

    public void setMapperClass(Class<M> clazz) {
        this.mapperClass = clazz;
    }

    @Override
    public Transaction<BatisEngine<M>> newTransaction(TransactionDescriptor descriptor) {
        TransactionIsolationLevel level = levelToBatisLevel(descriptor.isolation(),
                sessionFactory.getConfiguration());
        SqlSession session = level != null ? sessionFactory.openSession(level) : sessionFactory.openSession();
        final M m = session.getMapper(mapperClass);
        return new BatisTransaction<M>(new BasicBatisEngine<M>(session, m), session);
    }

    @Override
    public BatisEngine<M> detachedEngine() {
        SqlSession session = sessionFactory.openSession();
        return new BasicBatisEngine<M>(session, session.getMapper(mapperClass));
    }

    private TransactionIsolationLevel levelToBatisLevel(TransactionIsolation isolation,
            Configuration configuration) {
        if (isolation == null) {
            return null;
        }

        TransactionProfile profile = ProfilesManager.INSTANCE.profileFor(configuration.getDatabaseId());
        isolation = profile.properIsolation(isolation);

        if (isolation == null) {
            return null;
        }

        for (TransactionIsolationLevel entry : TransactionIsolationLevel.values()) {
            if (isolation.jdbcCode().equals(entry.getLevel())) {
                return entry;
            }
        }
        return null;
    }
}