/// <summary>
/// If a prior instance was running, sends the args to it and returns true. Otherwise, returns false.
/// </summary>
public static bool QueryPriorInstance(string[] args, string channelUri)
{
bool createdNew;
mNamedMutex = new Mutex(true, channelUri, out createdNew);
if (!createdNew) //No previous instance was running, if a new mutex was created.
{
try
{
EndpointAddress address = new EndpointAddress(channelUri);
IPriorInstance instance = ChannelFactory <IPriorInstance> .CreateChannel(new NetNamedPipeBinding(), address);
try
{
instance.Signal(args);
}
finally
{
((ICommunicationObject)instance).Close();
}
return(true);
}
catch (Exception ex)
{
System.Diagnostics.Trace.TraceWarning("Could not communicate with existing prior instance: " + ex.Message);
return(false);
}
}
return(false);
}
/// <summary>
/// If a prior instance was running, sends the args to it and returns true. Otherwise, returns false.
/// </summary>
public static bool QueryPriorInstance(string[] args, string channelUri)
{
mNamedMutex = new EventWaitHandle(false, EventResetMode.ManualReset, channelUri, out mOwnsMutex);
if (!mOwnsMutex) //No previous instance was running, if a new mutex was created.
{
//If a new mutex was not created, then wait for it to be signalled, indicating that the instance that does own it is now ready to recieve incoming signals
if (mNamedMutex.WaitOne(WaitForFirstInstanceTimeout))
{
try
{
EndpointAddress address = new EndpointAddress(channelUri);
IPriorInstance instance = ChannelFactory <IPriorInstance> .CreateChannel(new NetNamedPipeBinding(), address);
try
{
instance.Signal(args);
}
finally
{
((ICommunicationObject)instance).Close();
}
return(true);
}
catch (Exception ex)
{
System.Diagnostics.Trace.TraceWarning("Could not communicate with existing prior instance: " + ex.Message);
return(false);
}
}
else
{
System.Diagnostics.Trace.TraceWarning("Could not communicate with existing prior instance: timed out");
return(false);
}
}
return(false);
}