IList <TopicDetails> GetFieldDetails(TopicDetails details)
{
// We have a completely new entry
if (!_fieldToDetails.ContainsKey(details.BrokerUrl))
{
var newTopics = new Dictionary <string, IList <TopicDetails> >();
_fieldToDetails.Add(details.BrokerUrl, newTopics);
var newFieldList = new List <TopicDetails>();
newTopics.Add(details.Topic, newFieldList);
return(newFieldList);
}
var topics = _fieldToDetails[details.BrokerUrl];
// We have a new field with a NMS Topic
if (!topics.ContainsKey(details.Topic))
{
var newFieldList = new List <TopicDetails>();
topics.Add(details.Topic, newFieldList);
return(newFieldList);
}
return(topics[details.Topic]);
}
public string BrokerUrl; // Broker URL
public bool Equals(TopicDetails other)
{
if (ReferenceEquals(null, other))
{
return(false);
}
if (ReferenceEquals(this, other))
{
return(true);
}
return(Equals(other.BrokerUrl, BrokerUrl) && other.TopicId == TopicId && Equals(other.Topic, Topic) && Equals(other.Field, Field));
}
/// <summary>
/// Create a new Excel topic.
///
/// An Excel topic is a cell. We may have multiple Excel topics listening to the same
/// NMS topic.
///
/// Parse the supplied values and create a mapping so that the application can
/// send data back to the correct topic/cell.
/// </summary>
/// <param name="topicId"></param>
/// <param name="strings">
/// The first value is a string representing the topic.
/// The second value is the field of interest.
/// The third (optional) value is the broker.
/// </param>
/// <param name="getNewValues"></param>
/// <returns></returns>
public object ConnectData(int topicId, ref Array strings, ref bool getNewValues)
{
getNewValues = true; // over-write any saved values in the spreadsheet
TopicDetails details = null;
try {
_log.Info("Creating subscriber for Excel topic " + topicId);
// If we have a brokerUrl use it, otherwise use the default broker
details = new TopicDetails {
TopicId = topicId,
Topic = ((string)strings.GetValue(0)),
Field = ((string)strings.GetValue(1)),
BrokerUrl = _config.MarketDataBrokerUrl
};
if (strings.Length > 2)
{
details.BrokerUrl = (string)strings.GetValue(2);
}
// setup our mappings
lock (_topicToDetails) {
_topicToDetails.Add(topicId, details);
var detailList = GetFieldDetails(details);
if (!detailList.Contains(details))
{
detailList.Add(details);
}
var broker = BrokerFactory.Broker(details.BrokerUrl);
var subscriber = broker.TopicSubscriber(details.Topic, _topicHandler.OnMessageHandler);
if (!_brokers.ContainsKey(details.BrokerUrl))
{
_brokers.Add(details.BrokerUrl, broker);
}
var rt = LookupValueFor(details.BrokerUrl, details.Topic, details.Field);
if (rt != null)
{
return(rt);
}
}
switch (details.Field)
{
case "productVersion":
return(_version);
case "brokerUrl":
return(_config.MarketDataBrokerUrl);
}
return("N/A");
} catch (Exception e) {
_log.Error("Tried to subscribe to topic " + strings, e);
if (details != null)
{
SetLookupValue(details.BrokerUrl, details.Topic, details.Field, "#Error");
}
return("#Error");
}
}
string LookupValueFor(TopicDetails details)
{
return(LookupValueFor(details.BrokerUrl, details.Topic, details.Field));
}
