/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * 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 the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>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.apereo.portal.jpa;

import javax.persistence.EntityManager;
import org.springframework.context.ApplicationEvent;

/**
 * Base {@link EntityManager} related event.
 *
 */
public abstract class AbstractEntityManagerEvent extends ApplicationEvent {
    private static final long serialVersionUID = 1L;

    private final String entityManagerId;
    private final String persistenceUnitName;
    private final transient EntityManager entityManager;

    AbstractEntityManagerEvent(
            Object source,
            long entityManagerId,
            String persistenceUnitName,
            EntityManager entityManager) {
        super(source);
        this.entityManagerId = persistenceUnitName + "." + entityManagerId;
        this.persistenceUnitName = persistenceUnitName;
        this.entityManager = entityManager;
    }

    /** Unique id (within this JVM) for the entity manager */
    public String getEntityManagerId() {
        return entityManagerId;
    }

    /** Name of the JPA Persistent Unit */
    public String getPersistenceUnitName() {
        return persistenceUnitName;
    }

    /** The EntityManager, transient so may be null if event has been serialized */
    public EntityManager getEntityManager() {
        return entityManager;
    }
}