PortInUseException: Port currently owned by -- avec portId.isCurrentlyOwned()==false
Bonjour,
J'utilise javax.comm pour lire un port COM avec mon appli java (j'ai le meme problème avec RXTX), lorsque j'ai une IOException (sans doute du à une erreur de connexion entre le Lantronix Wi-Port et mon PC où je redirige le flux vers le port COM); je ferme mon port et le reouvre et en general ca remarche. Mais parfois j'obtiens une PortInUseException lors de la réouverture du port alors que le portId.isCurrentlyOwned() renvoi "false".
Note: parfois le port apparaît miraculeusement comme non occupé et ca remarche.
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| Trying to open serial port 'COM20'!
Successfully opened serial port 'COM20'!
CA MARCHE- Tue Aug 20 16:48:52 CEST 2013
CA MARCHE- Tue Aug 20 16:48:54 CEST 2013
CA MARCHE- Tue Aug 20 16:48:56 CEST 2013
(plus tard)
CA MARCHE- Tue Aug 20 18:55:47 CEST 2013
CA MARCHE- Tue Aug 20 18:55:49 CEST 2013
CA MARCHE- Tue Aug 20 18:55:51 CEST 2013
waiting ...
waiting ...
waiting ...
waiting ...
waiting ...
echec ...
java.io.IOException: write error
at com.sun.comm.Win32SerialPort.write(Win32SerialPort.java:677)
at com.sun.comm.Win32SerialPort.write(Win32SerialPort.java:664)
at com.sun.comm.Win32SerialOutputStream.write(Win32SerialOutputStream.java:34)
at java.io.DataOutputStream.write(Unknown Source)
at projet.RS232.demandecontext1(RS232.java:774)
at projet.RS232.readBytes(RS232.java:441)
at projet.GUI$Thread1.run(GUI.java:1981)
at java.lang.Thread.run(Unknown Source)
trying to close system
succes to close system
Trying to to open serial port 'COM20'!
Failed to open serial port 'COM20'!
javax.comm.PortInUseException: Port currently owned by Unknown Windows Application
at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337)
at projet.RS232.openConnection(RS232.java:333)
at projet.GUI$Thread1.run(GUI.java:1988)
at java.lang.Thread.run(Unknown Source)
Trying to to open serial port 'COM20'!
Failed to open serial port 'COM20'!
javax.comm.PortInUseException: Port currently owned by Unknown Windows Application
at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337)
at projet.RS232.openConnection(RS232.java:333)
at projet.GUI$Thread1.run(GUI.java:1988)
at java.lang.Thread.run(Unknown Source)
Trying to to open serial port 'COM20'!
Failed to open serial port 'COM20'!
javax.comm.PortInUseException: Port currently owned by Unknown Windows Application
at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:337)
at projet.RS232.openConnection(RS232.java:333)
at projet.GUI$Thread1.run(GUI.java:1988)
at java.lang.Thread.run(Unknown Source) |
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| //dans le GUI
cmdSTART.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent evt){
lancer();
}
private void lancer(){
if(rs232.openConnection()){
animated1=true;
t1=new Thread(new Thread1());
t1.setPriority(7);
t1.start();
marche=true;
}
}
class Thread1 implements Runnable{
public void run(){
while(animated1){
try{
rs232.readBytes();
}
catch(Exception e){
e.printStackTrace();
rs232.closeConnection();
boolean nbbyte=false;
while(nbbyte==false){
nbbyte=rs232.openConnection();
try{
Thread.sleep(5000);
}
catch(InterruptedException e1){
e1.printStackTrace();
}
}
}
}
}
} |
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| public void readBytes() throws IOException,InterruptedException{
demandecontext1();
receptdata();
traitementdata();
try{
Thread.sleep(300);
}
catch(InterruptedException e){
e.printStackTrace();
}
}
private void demandecontext1() throws IOException,InterruptedException{
/*ligne 774*/out1x.write(91);
out1x.write(91);
Thread.sleep(100);
out1x.write(48);
Thread.sleep(100);
out1x.write(65);
Thread.sleep(100);
out1x.write(48);
Thread.sleep(100);
out1x.write(48);
Thread.sleep(100);
out1x.write(48);
Thread.sleep(100);
out1x.write(49);
Thread.sleep(100);
out1x.write(93);
Thread.sleep(1000);
}
private void receptdata() throws IOException,InterruptedException{
byte bufferByte[]=new byte[1024]
int nbbyte=in1x.available();
int comp=0;
while(nbbyte==0&&comp<5){
System.out.println("waiting ...");
Thread.sleep(1000);
nbbyte=in1x.available();
comp++;
}
if(comp==5){
System.out.println("echec ...");
return;
}
nbbyte=in1x.read(bufferByte,0,nbbyte);
System.out.println("CA MARCHE- "+new Date());
//+Gestion des bytes recu
}
public boolean openConnection(){
if(portId1x.isCurrentlyOwned()){
System.out.println("Port ouvert par une autre application");
System.out.println(portId1x.getCurrentOwner());
return false;
}
else{
try{
System.out.println("Trying to to open serial port '"+com1x+"'!");
boolean flag1=portId1x.isCurrentlyOwned();
if(flag1){
System.out.println("port ="+!flag1);
}
/*ligne 333*/ serialPort1x=(SerialPort) portId1x.open(appName,openTimeOut);
System.out.println("Successfully opened serial port '"+serialPort1x.getName()+"'!");
// Setting the serial connection as requested...
serialPort1x.setSerialPortParams(baudrate1,databits,stopbit,parity);
in1x=new DataInputStream(serialPort1x.getInputStream());
out1x=new DataOutputStream(serialPort1x.getOutputStream());
return true;
}
catch(Exception e){
System.out.println("Failed to open serial port '"+serialPort1x[p].getName()+"'!");
e.printStackTrace();
return false;
// JOptionPane.showMessageDialog(null,"Erreur lors de l'ouverture du port "
// + com, "ERREUR", JOptionPane.ERROR_MESSAGE);
// System.exit(1); // sortie de l'appli
}
}
}
public void closeConnection(){
try{
System.out.println("trying to close system ");
in1x.close();
out1x.close();
serialPort1x.close();
System.out.println("succes to close system ");
}
catch(IOException e){
System.out.println("failed to close intrusion system ");
System.out.println("Cannot open and / or close serial connection!Details:\n"+e.getMessage());
//System.exit(1);
}
} |
Ouverture d'un port COM/SERIE Java
Bonjour,
Je souhaiterai savoir ou vous avez trouver les librairies javax.comm que vous utilisez.
J'aimerai ouvrir un port com sur ordinateur. Mais il me manque les librairies.
Merci d'avance ^^
