EntityManagerHolderImpl.java example

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blaze-persistence-master
/*
 * Copyright 2014 - 2017 Blazebit.
 *
 * 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 com.blazebit.persistence.examples.cdi.bean;

import com.blazebit.persistence.examples.base.bean.EntityManagerHolder;
import org.apache.deltaspike.jpa.api.transaction.TransactionScoped;

import javax.annotation.PostConstruct;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;

/**
 * Workaround for WELD-2245 which prevents the use of @TransactionScoped for EntityManager directly
 *
 * @author Moritz Becker (moritz.becker@gmx.at)
 * @since 1.2
 */
@TransactionScoped
public class EntityManagerHolderImpl implements EntityManagerHolder {

    private EntityManager em;

    @Inject
    @PostConstruct
    public void init(EntityManagerFactory emf) {
        em = emf.createEntityManager();
    }

    @Produces
    public EntityManager getEntityManager() {
        return em;
    }

    public void dispose(@Disposes EntityManager entityManager) {
        if (entityManager.isOpen()) {
            entityManager.close();
        }
    }
}