org.springframework.integration.jpa.core.AbstractJpaOperations.java Source code

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Here is the source code for org.springframework.integration.jpa.core.AbstractJpaOperations.java

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/*
 * Copyright 2002-2019 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.integration.jpa.core;

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

import org.springframework.beans.factory.InitializingBean;
import org.springframework.orm.jpa.SharedEntityManagerCreator;
import org.springframework.util.Assert;

/**
 *
 * @author Gunnar Hillert
 *
 * @since 2.2
 *
 */
abstract class AbstractJpaOperations implements JpaOperations, InitializingBean {

    private EntityManager entityManager;

    private EntityManagerFactory entityManagerFactory;

    public void setEntityManager(EntityManager entityManager) {
        Assert.notNull(entityManager, "The provided entityManager must not be null.");
        this.entityManager = entityManager;
    }

    protected EntityManager getEntityManager() {
        return this.entityManager;
    }

    public void setEntityManagerFactory(EntityManagerFactory entityManagerFactory) {
        Assert.notNull(entityManagerFactory, "The provided entityManagerFactory must not be null.");
        this.entityManagerFactory = entityManagerFactory;
    }

    @Override
    public final void afterPropertiesSet() {
        this.onInit();
    }

    /**
     * Subclasses may implement this for initialization logic.
     */

    protected void onInit() {

        if (this.entityManager == null && this.entityManagerFactory != null) {
            this.entityManager = SharedEntityManagerCreator.createSharedEntityManager(this.entityManagerFactory);
        }

        Assert.notNull(this.entityManager,
                "The entityManager is null. Please set " + "either the entityManager or the entityManagerFactory.");

    }

    @Override
    public void flush() {
        this.entityManager.flush();
    }

}