public static string GetServerProperty(this XSocketClient client, string propertyName)
{
var bindingName = "get_" + propertyName;
// why event name is lowercase?
var eventName = bindingName.ToLowerInvariant();
// we must be careful to preserve any existing binding on the server property
var currentBinding = client.GetBindings().FirstOrDefault(b => b.Event == eventName);
try {
// only one binding at a time per event in the client
if (currentBinding != null)
{
client.UnBind(bindingName);
}
var waitEvent = new ManualResetEventSlim();
string value = null;
try {
client.Bind(bindingName, (e) => {
value = e.data;
waitEvent.Set();
});
// we must "Trigger" the reading of the property thru its "event" (get_XXX)
client.Trigger(bindingName);
// and wait for it to arrive in the callback
if (waitEvent.Wait(5000))
{
return(value);
}
throw new Exception("Timeout getting property from XSockets controller at " + client.Url);
} finally {
client.UnBind(bindingName);
}
} finally {
// if there was a binding already on the "property getter", we must add it back
if (currentBinding != null)
{
client.Bind(bindingName, currentBinding.Callback);
}
}
}
