java comlib send SMS messages cat repeatedly transmitting port is occupied by the error how to release it? Master please come help.

java comlib send SMS messages cat repeatedly transmitting port is occupied by the error how to release it? Master please come help.
given as follows:
org.smslib.GatewayException: Comm library exception: java.lang.RuntimeException: javax.comm.PortInUseException: Port currently owned by org.smslib
at org.smslib.modem.SerialModemDriver.connectPort (SerialModemDriver.java: 92)
at org.smslib.modem.AModemDriver.connect (AModemDriver.java: 110)
at org.smslib.modem.ModemGateway.startGateway (ModemGateway.java: 126)
at org.smslib.Service $ 1Starter.run (Service.java: 222)

can only send one , send ah can not repeat , repeat , they reported sending port is occupied.

package com.huanrong.util;

import java.util.Enumeration;
import java.util.LinkedList;
import java.util.List;

import javax.comm.CommPortIdentifier;
import javax.comm.SerialPort;

import org.apache.log4j.Logger;
import org.smslib.AGateway;
import org.smslib.AGateway.Protocols;
import org.smslib.GatewayException;
import org.smslib.InboundMessage;
import org.smslib.Message.MessageEncodings;
import org.smslib.OutboundMessage;
import org.smslib.Service;
import org.smslib.modem.SerialModemGateway;

/ **
*
* @ ClassName: SendMsg
* @ Description: send SMS messages cat method
* @ author jay
* @ date 05:46:04 2012-10-17 pm
*
* Usage:
* SendMsg.sendMsg (" phone number" , "Send Content" ) ;
*
* /
public class SendMsg {

private static final Logger logger = Logger.getLogger (SendMsg.class);

private Service smsService;

/ **
* Send SMS
* /
public SendMsg (String com) {
smsService = Service.getInstance ();

String portName = com ;/ / "/ dev/ttyUSB0" ;/ / COM24
SerialModemGateway gateway = new SerialModemGateway (
"modem." + portName, ; portName, 9600, "wavecom", "PL2303");
gateway.setInbound (true);
gateway.setOutbound (true);
gateway.setProtocol (Protocols.PDU);
gateway.setSimPin ("0000");
try {
smsService.addGateway (gateway);
} catch (GatewayException ex) {
logger.error (ex.getMessage ());
}
}


/ **
*
* /
public void start () throws Exception {
logger.info ("SMS service start .....");
smsService.startService ();
}

/ **
*
* /
public void destroy () throws Exception {

smsService.stopService ();
logger.info ("SMS service stop");
}

/ **
* send SMS
* @ param msg
* @ return Boolean
* /
public Boolean sendSMS (OutboundMessage msg) throws Exception {
msg.setEncoding (MessageEncodings.ENCUCS2);
return smsService.sendMessage (msg);
}

private boolean isStarted () {
if (smsService.getServiceStatus () == Service.ServiceStatus.STARTED) {
for (AGateway gateway: smsService.getGateways ()) { ;
if (gateway.getStatus () == AGateway.GatewayStatuses.STARTED) {
return true;
}
}
}
return false;
}

/ **
* read SMS
* read SMS
* @ return List
* /
public List readSMS () {
List msgList = new LinkedList ();
if (! isStarted ()) {
return msgList;
}
try {
this.smsService.readMessages (msgList,
InboundMessage.MessageClasses.ALL) ;
logger.info ("read SMS size:" + msgList . size ());
} catch (Exception e) {
logger.error ("read error:", e);
}
return msgList;
}

/ **
* @ param args
* /
public static void main (String [] args) throws Exception {
SendMsg smsHandler = new SendMsg (com.huanrong.crm.Constant.COMM1);
OutboundMessage outMsg = new OutboundMessage ("*******", " Information Test 1 " ;) ;
smsHandler.start ();
/ / send SMS
smsHandler.sendSMS (outMsg);
System.out.println (" successfully sent one ! " ) ;

smsHandler.destroy ();

System.out.println ("-----------");


}
}



how do ah, always been this way , the collapse of the matter, we help out .

------ Solution ------------------------------------ --------
destroy () , there is no release of the serial connection. You can try the following method

connection independent, as an attribute . Send pseudo-code :

if (! connected ()) {
connection.connect ();
}

sendmsg (msg);



------ Solution ------------------------------------ --------
is not run to close
------ Solution ----------------------- ---------------------
service is a service , the port is the port , the port can not be judged according to the state of the service status , and certainly not by the end of the service to shut down the port . ..
A service can have multiple ports , each port before and after the increase should be deleted judgment port status.
------ For reference only -------------------------------------- -
Meirenhuida ah, hastily , online, their top .
------ For reference only -------------------------------------- -

how to release the serial connection it
------ For reference only ------------------------ Editor's Note ---------------
do not know , can not find the close approach , and finally I was solved , start tomcat service when the service starts sending messages only can be started once, it is a single case , then you can send a stop when the service tomcat stop sending SMS services. This can now be sent.
------ For reference only -------------------------------------- -
SerialModemGateway is your serial connection , have you its close approach
------ For reference only -------------------- -------------------
[ hair Assad happen ] [ / Assad issued ]
------ For reference I have encountered only ---------------------------------------
not send duplicate situation !
------ For reference only -------------------------------------- -
how to release port
------ For reference only ------------------------------- --------
Service smsService is static, starting just once , after texting again , not in this start , sendMessage sent directly transferred on the line
------ For reference only ---------------------------------------
landlord , and why I am here tomcat startup when started the SMS service , but the call sendMsg when sending SMS status is STOPED it ?
which I always wondered , can you tell me how you do it?

------ For reference only ---------------------------------- -----
you great God, my program always reported
[main] WARN org.smslib - sendMessage (): Gateway modem.com3 does not respond, marking for restart.
how to solve it , Jiqiu !
------ For reference only -------------------------------------- . -
in smsService stopService (); underneath sentence smsService removeGateway (gateway); try
.