private aaObject ObjectAttributesReady(aaObject obj)
{
int i = 0;
while (i < 5)
{
if (obj.DoesntExist)
return null;
if (obj.Attributes.Count > 0)
return obj;
Thread.Sleep(500); //TODO: this should be refactored out to a command line switch
i++;
};
//if nothing comes through by ~2s then assume that nothing is ok
return null;
}
private void RemoveObject(aaObject obj)
{
lock (_objects) {
_objects.Remove(obj);
//go through each of the object attributes, and unadvise all the handles
foreach (var attrib in obj.Attributes)
{
var res = from kvp in _lmxValues where kvp.Value.Attribute == attrib select kvp;
foreach (var kvp in res.ToList())
{
//LogMessage(string.Format("Removing/Unadvising {0} from the lmxValues list.", kvp.Value.Name));
RemoveItem(kvp.Key);
}
}
}
}
private aaObject GetObject(string ObjectName)
{
try
{
LogMessage("Fetching object " + ObjectName);
//If we have already retrieved the attributes for an object, then just return the values
aaObject obj = _objects.FirstOrDefault((arg) => arg.Name == ObjectName);
if (obj != null)
{
if (obj.DoesntExist)
{
return null;
}
else
{
obj.LastAccessed = DateTime.Now;
return obj;
}
}
//we are fetching a new object
obj = new aaObject() { Name = ObjectName, Attributes = new List<aaAttribute>()};
lock (_objects)
{
lock (_lmxValues)
{
//otherwise fetch the attributes
//Pro tip: put the brackets on the end to get an array (someone should put this in the documentation for MXAccess...)
LMXValue val = new LMXValue() { Name = ObjectName + "._Attributes[]", OnceOnly = true, Parent = obj };
int hAttribs = _lmxServer.AddItem(_hLmx, val.Name);
_lmxValues.Add(hAttribs, val);
_lmxServer.Advise(_hLmx, hAttribs);
}
_objects.Add(obj);
}
//Give the initial values time to come through on the other threads
return ObjectAttributesReady(obj);
}
catch (Exception ex)
{
LogMessage(ex.ToString());
return null;
}
}
