es.emergya.comunications.MessageProcessor.java Source code

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Here is the source code for es.emergya.comunications.MessageProcessor.java

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/*
 * Copyright (C) 2010, Emergya (http://www.emergya.es)
 *
 * @author <a href="mailto:jlrodriguez@emergya.es">Juan Lus Rodrguez</a>
 * @author <a href="mailto:marias@emergya.es">Mara Arias</a>
 *
 * This file is part of GoFleet
 *
 * This software is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, if you link this library with other files to
 * produce an executable, this library does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * This exception does not however invalidate any other reasons why the
 * executable file might be covered by the GNU General Public License.
 */
/**
 * 
 */
package es.emergya.comunications;

import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.transaction.annotation.Transactional;

import es.emergya.actions.InboxAdmin;
import es.emergya.bbdd.bean.Inbox;
import es.emergya.bbdd.bean.TipoMensaje;
import es.emergya.bbdd.dao.TipoMensajeHome;
import es.emergya.comunications.exceptions.MessageProcessingException;
import es.emergya.utils.LogicConstants;
import es.emergya.utils.MyBeanFactory;

/**
 * @author marias
 * 
 */
public abstract class MessageProcessor {
    private static final Log log = LogFactory.getLog(MessageProcessor.class);

    private TipoMensajeHome tipoMensajeHome;

    public MessageProcessor() {
        tipoMensajeHome = (TipoMensajeHome) MyBeanFactory.getBean("tipoMensajeHome");
    }

    /**
     * @param datragam
     * @param origen
     * @return
     * @throws MessageProcessingException
     */
    public void processingMessage(Inbox entrada) throws MessageProcessingException {

        // Divide el datagram
        String[] campos = StringUtils.splitPreserveAllTokens(entrada.getDatagramaTetra(),
                LogicConstants.FIELD_SEPARATOR);

        if (entrada.getOrigen() == null)
            throw new MessageProcessingException("No sabemos el origen", entrada);
        if (entrada.getDatagramaTetra() == null)
            throw new MessageProcessingException("El mensaje no tenia contenido", entrada);

        /*
         * Server format: Datagram structure: ID_MESSAGE (0) | ID_MESSAGE_TYPE
         * (1) | MESSAGE BODY (2 .. n)
         * 
         * EME format: Datagram structure: ID_MESSAGE_TYPE (0) | MESSAGE BODY (1
         * .. n)
         */
        MessageProcessor.log
                .debug("Ha llegado un mensaje de " + entrada.getOrigen() + ":" + entrada.getDatagramaTetra());
        int codeMessageType = getTipoMensaje(entrada, campos);
        try {
            processMessage(entrada, campos, codeMessageType);
        } catch (MessageProcessingException e) {
            log.error("Error al procesar el mensaje");
        }
        save(entrada);
    }

    private void save(Inbox entrada) {
        entrada.setProcesado(true);
        InboxAdmin.saveOrUpdate(entrada);
    }

    @Transactional
    private Integer getTipoMensaje(Inbox entrada, String[] campos) {
        TipoMensaje tipo = null;
        try {
            Integer codigo = Integer.parseInt(campos[1]);
            tipo = tipoMensajeHome.getTipoByCode(codigo);
            if (tipo == null)
                save(entrada);
            else
                return tipo.getCodigo();
        } catch (NumberFormatException nfe) {
            save(entrada);
        }
        return -1;
    }

    /**
     * 
     * Se recomienda usar: switch (codeMessageType) { case CODE: ... break; }
     * 
     * @param entrada
     * @param campos
     * @param codeMessageType
     */
    protected abstract void processMessage(Inbox entrada, String[] campos, int codeMessageType)
            throws MessageProcessingException;
}