enquirelink.java

短信短消息SMPP开发的JAVA API最新版本。

/*
 * Java SMPP API
 * Copyright (C) 1998 - 2002 by Oran Kelly
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * A copy of the LGPL can be viewed at http://www.gnu.org/copyleft/lesser.html
 * Java SMPP API author: [e-mail]
 * Java SMPP API Homepage: http://smppapi.sourceforge.net/
 * $Id: EnquireLink.java,v 1.14 2004/07/11 20:28:08 orank Exp $
 */
package ie.omk.smpp.message;



/** Check the link status.
  * This message can originate from either an ESME or the SMSC. It is used to
  * check that the entity at the other end of the link is still alive and
  * responding to messages. Usually used by the SMSC after a period of
  * inactivity to decide whether to close the link.
  * @author Oran Kelly
  * @version 1.0
  */
public class EnquireLink
    extends ie.omk.smpp.message.SMPPRequest
{
    /** Construct a new EnquireLink.
      */
    public EnquireLink()
    {
	super(ENQUIRE_LINK);
    }

    /** Construct a new EnquireLink with specified sequence number.
      * @param seqNum The sequence number to use
      * @deprecated
      */
    public EnquireLink(int seqNum)
    {
	super(ENQUIRE_LINK, seqNum);
    }

    public int getBodyLength()
    {
	return (0);
    }

    public void readBodyFrom(byte[] body, int offset) throws SMPPProtocolException {
    }

    /** Convert this packet to a String. Not to be interpreted programmatically,
      * it's just dead handy for debugging!
      */
    public String toString()
    {
	return new String("enquire_link");
    }
}