private void DisableConnection()
{
// Disable the forward channel
myXmlRpcProxy = null;
// Disable the back channel
// NOTE: this should not be necessary in normal operation, but could consider
// a future change to indicate the connection to the instrument has been lost!
// For example, throw an application exception/fire an event so the UI can
// indicate that server connectivity has been lost.
}
private InstrumentControlProxy()
{
// Create the objects that represent the control/event connections...
// Make initial attempt to connect to the Instrument Control server.
// Get the number of times to re-try if the connection attempt fails.
NameValueCollection nvc = (NameValueCollection)System.Configuration.ConfigurationManager.GetSection("Separator/InstrumentControlConnection");
int retryCount, retryWait;
try
{
retryCount = int.Parse(nvc.Get("RetryCount"));
retryWait = int.Parse(nvc.Get("RetryWait_ms"));
}
catch
{
// Set default values in case the parse fails
retryCount = 3;
retryWait = 2000; // milliseconds
}
do
{
try
{
myXmlRpcProxy = new InstrumentControlXmlRpcProxy(
RemotingInfo.GetInstance().IcsServerURL);
retryCount = 0; // Clear the retry count as we're now connected.
}
catch (Exception ex)
{
// Connection attempt failed. Re-try if the number of attempts so far is
// within the retry count specified in the application configuration file,
// otherwise propagate an exception to tell the caller we failed to connect.
myXmlRpcProxy = null;
LogFile.AddMessage(TraceLevel.Warning, "retryCount = " + retryCount + " " + ex.Message);
if (--retryCount <= 0)
{
throw new ApplicationException(
SeparatorResourceManager.GetSeparatorString(
StringId.ExFailedToConnectToInstrumentControl));
}
// Pause before retrying connection attempt
Thread.Sleep(retryWait);
}
} while (retryCount > 0);
}
