Examples of javax.microedition.io.SocketConnection

javax.microedition.io.SocketConnection

com:79 defines a target socket on the host.com system at port 79.

Note that RFC1900 recommends the use of names rather than IP numbers for best results in the event of IP number reassignment.

Closing Streams

Every StreamConnection provides a Connection object as well as an InputStream and OutputStream to handle the I/O associated with the connection. Each of these interfaces has its own close() method. For systems that support duplex communication over the socket connection, closing of the input or output stream SHOULD shutdown just that side of the connection. e.g. closing the InputStream will permit the OutputStream to continue sending data.

Once the input or output stream has been closed, it can only be reopened with a call to Connector.open(). The application will receive an IOException if an attempt is made to reopen the stream.

BNF Format for Connector.open() string

The URI must conform to the BNF syntax specified below. If the URI does not conform to this syntax, an IllegalArgumentException is thrown.

<socket_connection_string>	::= "socket://"<hostport>
<hostport>	::= host ":" port
<host>	::= host name or IP address (omitted for inbound connections, See ServerSocketConnection)
<port>	::= numeric port number

Examples

The following examples show how a SocketConnection would be used to access a sample loopback program.

 SocketConnection sc = (SocketConnection) Connector.open("socket://host.com:79"); sc.setSocketOption(SocketConnection.LINGER, 5); InputStream is  = sc.openInputStream(); OutputStream os = sc.openOutputStream(); os.write("\r\n".getBytes()); int ch = 0; while(ch != -1) { ch = is.read(); } is.close(); os.close(); sc.close();

    /**
     * The socket listener loop.  Awaits a connection, processes requests from
     * the connection, then goes back to waiting, forever.
     */
    public void run() {
        SocketConnection sock;


        while (true) {
            d("listening on port " + PORT);
            try {
                sock = (SocketConnection)serv.acceptAndOpen();

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            task.setExecutable(new org.netbeans.microedition.util.Executable() {
                public void execute() throws Exception {//GEN-END:|49-getter|1|49-execute


                    InputStream imageInputStream = fileCon.openInputStream();
                    transferWaitScreen.setText("Connecting to server on port " + serverPort + "...");
                    SocketConnection sc = (SocketConnection) Connector.open("socket://" +
                            serverAddress + ":" + serverPort);


                    DataInputStream dis = sc.openDataInputStream();
                    DataOutputStream dos = sc.openDataOutputStream();


                    transferWaitScreen.setText("Sending candidates number (" + candidatesNumber + ") ...");
                    dos.write(Integer.parseInt(candidatesNumber));
                    dos.flush();

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      if(Modbus.debug) System.out.println("Listenening to " + m_ServerSocket.toString() + "(Port " + m_Port + ")");


      //Infinite loop, taking care of resources in case of a lot of parallel logins
      do {
        //FPFSocket incoming = m_ServerSocket.accept();
      SocketConnection incoming = (SocketConnection)m_ServerSocket.acceptAndOpen();
        if (Modbus.debug) System.out.println("Making new connection " + incoming.toString());
        if (m_Listening) {
          //FIXME: Replace with object pool due to resource issues
          m_ThreadPool.execute(
              new TCPConnectionHandler(
                  new TCPSlaveConnection(incoming)
              )
          );
          count();
        } else {
          //just close the socket
          incoming.close();
        }
      } while (m_Listening);
    } catch (IOException/*SocketException*/ iex) {
      if (!m_Listening) {
        return;

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