How to close the client connection to the Orbix 3 daemon

Orbix 3 clients do not automatically close the connection to the Orbix daemon. These connections need to be closed explicitly.

Orbix 3 Java provides the IT_KEEP_ALIVE_FORWARDER_CONNECTION configuration variable which can be set to false in order to close the connection to the Orbix daemon. This variable can be used in the following ways:

• in the OrbixWeb3.cfg configuration file by setting IT_KEEP_ALIVE_FORWARDER_CONN="false"
• passed as argument to your Orbix Java programm, e.g
  java test.myclient -OrbixWeb.IT_KEEP_ALIVE_FORWARDER_CONN=false
• passed as parameter to the JVM, e.g
  java -DOrbixWeb.IT_KEEP_ALIVE_FORWARDER_CONN=false test.myclient
• passed to ORB.init() in your code, e.g.
  ...
  java.util.Properties p = new java.util.Properties();
  p.put("OrbixWeb.IT_KEEP_ALIVE_FORWARDER_CONN","false");
  orb = ORB.init(args, p);
  ...
• explicitly close the connection to the Orbix daemon by using the closeConnection() call, e.g.
  ...
  orb = ORB.init(args, null);
  ...
  // after the connection to the server has been established and you do not need the connection to the daemon
  IT_daemon daemonVar = IT_daemonHelper.bind(":IT_daemon","localhost");
  boolean closed = _OrbixWeb.ORB(orb).closeConnection(daemonVar);

Orbix 3 C does not provide a configuration variable, so the only way to close the connection to the daemon is by explicitly closing the connection in the client code.To close the client-daemon connection, you must specifically bind to the daemon first, then close that proxy's channel.

The following is some sample code that will illustrate how to close the client-daemon connection with the CORBA::Orbix.closeChannel() API.

#define WANT_ORBIX_FDS // require for _fd()
#include "grid.hh" // from the grid.idl file
#include "daemon.hh" // from the daemon.idl file

int main () {

  // Client's proxy to the server object
  grid_var myGrid;
  // Client's proxy to the daemon object
  IT_daemon_var daemon;
  try {
    // bind to the daemon first
    daemon = IT_daemon::_bind("","localhost");
    // initial connection between the client
    // and the server is set up
    myGrid = grid::_bind(":grid","localhost");
    // now close the connection from the client to the daemon
    CORBA::Orbix.closeChannel( daemon->_fd() );
  } catch (CORBA::SystemException &se) {
  . . .
}