io.motown.ocpp.viewmodel.persistence.repositories.TransactionRepository Maven / Gradle / Ivy

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Open Charge Point Protocol (OCPP. The common parts of the different OCPP specifications are handled here. The SOAP and JSON web socket modules communicate with the core via this module. This module also handles the events sent out by the core.

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/**
 * Copyright (C) 2013 Motown.IO ([email protected])
 *
 * 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 io.motown.ocpp.viewmodel.persistence.repositories;

import io.motown.ocpp.viewmodel.persistence.entities.Transaction;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;

public class TransactionRepository {

    private static final Logger LOG = LoggerFactory.getLogger(ReservationIdentifierRepository.class);

    private EntityManagerFactory entityManagerFactory;

    public Transaction findTransactionById(Long id) {
        return getEntityManager().find(Transaction.class, id);
    }

    public void insert(Transaction transaction) {
        EntityManager entityManager = getEntityManager();
        EntityTransaction entityTransaction = entityManager.getTransaction();

        if (!entityTransaction.isActive()) {
            entityTransaction.begin();
        }

        try {
            entityManager.persist(transaction);
            entityTransaction.commit();
        } finally {
            if (entityTransaction.isActive()) {
                LOG.warn("Transaction is still active while it should not be, rolling back.");
                entityTransaction.rollback();
            }
        }
    }

    public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) {
        this.entityManagerFactory = entityManagerFactory;
    }

    private EntityManager getEntityManager() {
        return this.entityManagerFactory.createEntityManager();
    }
}