public void ShutdownScanWorker()
{
Exiting = true;
if (scanWorker != null)
{
try {
scanWorker.Exit(); // send Exit message
} catch (Exception e) {
Console.WriteLine("Exception sending ScanWorker.Exit(): " + e.ToString());
}
scanWorker = null;
}
if (workerProcess != null)
{
// try to wait for the worker to shutdown cleanly
for (int i = 0; i < 10; i++)
{
Thread.Sleep(10);
if (workerProcess.HasExited)
{
Console.WriteLine("worker exited cleanly: " + workerProcess.ExitCode);
break;
}
}
if (!workerProcess.HasExited)
{
workerProcess.Kill();
}
}
}
public ScannerController(ScannerControllerWidget scanControllerWidget)
{
this.scanControllerWidget = scanControllerWidget;
// connect to the scanner controller
var serverProvider = new BinaryServerFormatterSinkProvider();
var clientProvider = new BinaryClientFormatterSinkProvider();
serverProvider.TypeFilterLevel = System.Runtime.Serialization.Formatters.TypeFilterLevel.Full;
var props = new Hashtable();
props["name"] = "ipc";
props["portName"] = ScanWorker.Program.APP_NAME + "_CLIENT";
IpcChannel clientChannel = new IpcChannel(props, clientProvider, serverProvider);
ChannelServices.RegisterChannel(clientChannel);
scanWorker =
(IScanWorker)Activator.GetObject(
typeof(ScanWorker.ScanWorker),
"ipc://ScanSimple/ScanWorker");
try {
// try to connect to existing scan worker process first (for debugging)
bool alive = scanWorker.ping();
Console.WriteLine("scanworker ping() output = " + alive);
} catch (System.Runtime.Remoting.RemotingException e) {
// if we fail, launch a scan worker...
LaunchScanWorker();
for (int i = 0; i < 10; i++)
{
Thread.Sleep(50);
// and try to connect again
try {
bool alive2 = scanWorker.ping();
Console.WriteLine("scanworker ping() output = " + alive2);
break;
} catch (System.Runtime.Remoting.RemotingException e2) {
// try again.
Console.WriteLine("failed to connect to ScanWorker, trying again...");
}
}
// if we didn't connect, this will throw an exception
bool alive = scanWorker.ping();
// now create our scan master listener, and send it over
scanMaster = new ScanMaster(scanControllerWidget.mainWindow, scanControllerWidget);
scanWorker.RegisterMaster(scanMaster);
}
}