simpledialupmodem.java

pos机交易实现源代码 含金融卡交易8583协议实现 开发环境：linux 典型应用：嵌入系统开发 仅供参考

/*
 * Copyright (c) 2000 jPOS.org.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *    "This product includes software developed by the jPOS project 
 *    (http://www.jpos.org/)". Alternately, this acknowledgment may 
 *    appear in the software itself, if and wherever such third-party 
 *    acknowledgments normally appear.
 *
 * 4. The names "jPOS" and "jPOS.org" must not be used to endorse 
 *    or promote products derived from this software without prior 
 *    written permission. For written permission, please contact 
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "jPOS",
 *    nor may "jPOS" appear in their name, without prior written
 *    permission of the jPOS project.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  
 * IN NO EVENT SHALL THE JPOS PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR 
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the jPOS Project.  For more
 * information please see <http://www.jpos.org/>.
 */

/*
 * $Log: SimpleDialupModem.java,v $
 * Revision 1.12  2002/08/06 14:26:29  apr
 * backport from jPOS_2_0 branch
 *
 * Revision 1.10.2.1  2002/07/15 01:04:54  apr
 * Bugfix: flush the read buffer in reset (reported by Kris Leite)
 *
 * Revision 1.10  2000/11/02 12:09:17  apr
 * Added license to every source file
 *
 * Revision 1.9  2000/04/16 23:53:03  apr
 * LogProducer renamed to LogSource
 *
 * Revision 1.8  2000/03/22 22:45:38  apr
 * Removed init delay
 *
 * Revision 1.7  2000/03/22 20:44:41  apr
 * Playing with modem init
 *
 * Revision 1.6  2000/03/20 19:24:13  apr
 * Testing ISOGetty ... minor bugfixes/timings in answer()/hangup()/reset()
 *
 * Revision 1.5  2000/03/15 12:53:02  apr
 * WatchCD off/on in answer method
 *
 * Revision 1.4  2000/03/14 12:58:49  apr
 * Autoanswer with ATS0=1 instead of RING+ATA
 *
 * Revision 1.3  2000/03/14 00:00:12  apr
 * Added answer method
 *
 * Revision 1.2  2000/03/01 14:44:45  apr
 * Changed package name to org.jpos
 *
 * Revision 1.1  2000/01/11 01:25:01  apr
 * moved non ISO-8583 related classes from jpos.iso to jpos.util package
 * (AntiHog LeasedLineModem LogEvent LogListener LogSource
 *  Loggeable Logger Modem RotateLogListener SimpleAntiHog SimpleDialupModem
 *  SimpleLogListener SimpleLogSource SystemMonitor V24)
 *
 * Revision 1.1  1999/11/24 18:08:56  apr
 * Added VISA 1 Support
 *
 */

package org.jpos.util;

import java.io.*;
import javax.comm.*;

/**
 * Implements DialupModem
 *
 * @author <a href="mailto:[e-mail]">Alejandro P. Revilla</a>
 * @version $Revision: 1.12 $ $Date: 2002/08/06 14:26:29 $
 */
public class SimpleDialupModem implements Modem {
    V24 v24;
    String dialPrefix = "DT";
    long lastInit = 0;
    public static final int REINIT_MODEM = 2*60*1000;

    public final String[] resultCodes = {
	"OK\r",
	"CONNECT\r",
	"RING\r",
	"NO CARRIER\r",
	"ERROR\r",
	"CONNECT",
	"NO DIALTONE\r",
	"BUSY\r",
	"NO ANSWER\r"
    };
    
    public SimpleDialupModem (V24 v24) {
	super();
	this.v24 = v24;
    }
    public void setDialPrefix (String dialPrefix) {
	this.dialPrefix = dialPrefix;
    }
    private boolean checkAT() throws IOException {
	return v24.waitfor ("ATE1Q0V1\r", resultCodes, 10000) == 0;
    }
    private void reset() throws IOException {
	try {
	    v24.send ("AT\r"); Thread.sleep (250);
            v24.flushAndLog ();
	    if (v24.waitfor ("ATE1Q0V1H0\r", resultCodes, 1000) == 0) 
		return;
	    v24.dtr (false);     Thread.sleep (1000);
	    v24.dtr (true);      Thread.sleep (1000);
	    v24.send ("+++"); Thread.sleep (1000);
	} catch (InterruptedException e) { 
	} 
	v24.flushAndLog();
	if (!checkAT())
	    throw new IOException ("Unable to reset");
    }
    public void dial (String phoneNumber, long aproxTimeout) 
	throws IOException
    {
	int rc;
	long expire = System.currentTimeMillis() + aproxTimeout;

	while (System.currentTimeMillis() < expire) {
	    try {
		reset();
		Thread.sleep (250);
		rc = v24.waitfor (
		    "ATB0M1X4L1"+dialPrefix+phoneNumber +"\r", 
			resultCodes,45000
		);
		if (rc == 5) {
		    Thread.sleep (500); // CD debouncing/settlement time
		    break;
		}
	    } catch (IOException e) {
		e.printStackTrace();
	    } catch (InterruptedException e) { }
	}
    }
    public boolean isConnected() {
	return v24.isConnected();
    }
    public void initForAnswer () throws IOException {
	v24.setWatchCD (false);
	v24.setAutoFlushReceiver(false);
	if (!checkAT())
	    throw new IOException ("unable to initialize modem (0)");
	v24.send ("ATB0E0Q1S0=1\r");
	v24.setAutoFlushReceiver(true);
	lastInit = System.currentTimeMillis();
    }
    public void answer () throws IOException {
	v24.dtr (true);
	if (!v24.isConnected()) 
	    initForAnswer();
	while (!v24.isConnected()) {
	    if ((System.currentTimeMillis() - lastInit ) > REINIT_MODEM)
		initForAnswer();
	    try {
		Thread.sleep (1000);
	    } catch (InterruptedException e) { }
	}
	v24.setWatchCD (true);
    }
    public void hangup () throws IOException {
	v24.dtr (false);
	try {
	    Thread.sleep (1000);
	} catch (InterruptedException e) { }
	v24.dtr (true);
	if (v24.isConnected()) {
	    reset();
	    if (v24.isConnected()) 
		throw new IOException ("Can't hangup");
	}
    }
}