private string GetData(string key)
{
if (_data.ContainsKey(key))
return _data[key];
// Since the keys are variable, cache a list of which ones are available
// to prevent unnecessary trips to the service.
if (null == _availableKeys)
_availableKeys = EC2Metadata.GetItems(_path);
if (_availableKeys.Contains(key))
{
_data[key] = EC2Metadata.GetData(_path + key);
return _data[key];
}
else
return null;
}
