com.impetus.kundera.ejb.event.EntityEventDispatcher.java Source code

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Here is the source code for com.impetus.kundera.ejb.event.EntityEventDispatcher.java

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/*
 * Copyright 2010 Impetus Infotech.
 *
 * 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.impetus.kundera.ejb.event;

import java.util.List;

import javax.persistence.PersistenceException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.impetus.kundera.ejb.EntityManagerImpl;
import com.impetus.kundera.metadata.EntityMetadata;

/**
 * The Class EntityEventDispatcher.
 */
public class EntityEventDispatcher {

    /** The Constant log. */
    private static final Log log = LogFactory.getLog(EntityManagerImpl.class);

    /**
     * Fire event listeners.
     * 
     * @param metadata
     *            the metadata
     * @param entity
     *            the entity
     * @param event
     *            the event
     * @throws PersistenceException
     *             the persistence exception
     */
    public void fireEventListeners(EntityMetadata metadata, Object entity, Class<?> event)
            throws PersistenceException {

        // handle external listeners first
        List<? extends CallbackMethod> callBackMethods = metadata.getCallbackMethods(event);

        if (null != callBackMethods && !callBackMethods.isEmpty()) {
            log.debug("Callback >> " + event.getSimpleName() + " on " + metadata.getEntityClazz().getName());
            for (CallbackMethod callback : callBackMethods) {
                log.debug("Firing >> " + callback);
                try {
                    callback.invoke(entity);
                } catch (Exception e) {
                    throw new PersistenceException(e);
                }
            }
        }
    }
}