string ServiceHostUriFor(ProcessSettings serviceHostProcessSettings)
{
lock (this)
{
var uriFile = UriFileFor(serviceHostProcessSettings.Executable);
EnsureServiceHostProcessIsUp(uriFile, serviceHostProcessSettings);
return FirstLineOf(uriFile);
}
}
void EnsureServiceHostProcessIsUp(IFile uriFile, ProcessSettings serviceHostProcessSettings)
{
if (!uriFile.TryToDelete())
{
Logger.Log("server is already running");
return;
}
StartServiceHost(serviceHostProcessSettings);
WaitFor(uriFile, TimeSpan.FromMilliseconds(200));
}
IObservableX<IObservableServiceClient> CreateClientFor(ProcessSettings serviceHostProcessSettings)
{
return ObservableX.CreateWithDisposable<IObservableServiceClient>(observer =>
{
try
{
var serviceHostUri = ServiceHostUriFor(serviceHostProcessSettings);
observer.CompleteWith(new ObservableServiceClient(serviceHostUri));
}
catch (Exception e)
{
Logger.LogError(e);
observer.OnError(e);
}
return Disposable.Empty;
});
}
public IObservableX<IObservableServiceClient> ClientFor(ProcessSettings serviceHostProcessSettings)
{
return CreateClientFor(serviceHostProcessSettings).RetryEvery(TimeSpan.FromMilliseconds(500), 3);
}
void StartServiceHost(ProcessSettings serviceHostProcessSettings)
{
Logger.Log("Starting {0}".Fmt(serviceHostProcessSettings.Executable));
using (Shell.StartManagedProcess(serviceHostProcessSettings))
{
// this doesn't kill the actual process but
// just releases any resources attached to
// the object
}
}
