public void StartListeningTo(string topicName, string recordKey, string fieldName, int topicId)
{
// Ensure we only listen to the topic once - this allows clients to call
// us multiple times
lock (_lockObject)
{
// Add the recordKey/fieldName to topicId mapping and start subscribing
var topicFieldKey = new TopicKey(recordKey, fieldName);
if (!_topicNameToTopicId.ContainsKey(topicFieldKey))
{
var newTopicList = new List <int>();
_topicNameToTopicId.Add(topicFieldKey, newTopicList);
}
var topicIds = _topicNameToTopicId[topicFieldKey];
topicIds.Add(topicId);
if (!_topicIdToTopicName.ContainsKey(topicId))
{
_topicIdToTopicName.Add(topicId, topicFieldKey);
}
if (_listeningToTopics.Contains(topicName))
{
return;
}
if (CreateTopicListener(topicName))
{
_listeningToTopics.Add(topicName);
}
}
}
private void RegisterGenericChange(string fieldName, string fieldValue)
{
var topicFieldKey = new TopicKey(fieldName, fieldName);
if (!_topicNameToTopicId.ContainsKey(topicFieldKey))
{
return;
}
var topicId = _topicNameToTopicId[topicFieldKey];
// remove incase it is already present
UpdateChangedTopic(topicId, fieldValue);
}
private void AddAdminFieldUpdates(string topicKey, IDictionary <string, string> parsedMessage)
{
var accountPair = "account=" + parsedMessage["account"];
foreach (var fieldName in _accountAdminFields)
{
var recordKey = BuildPositionLookupKey(accountPair, fieldName);
var topicFieldKey = new TopicKey(recordKey, fieldName);
if (!_topicNameToTopicId.ContainsKey(topicFieldKey))
{
continue;
}
var topicId = _topicNameToTopicId[topicFieldKey];
// remove incase it is already present
UpdateChangedTopic(topicId, LookupValue(topicKey, fieldName));
}
}
private void RegisterChange(string topicKey, IDictionary <string, string> parsedMessage)
{
// for each topic and record, add them to the list of changed topics
lock (_lockObject)
{
foreach (var fieldName in parsedMessage.Keys)
{
var topicFieldKey = new TopicKey(topicKey, fieldName);
if (!_topicNameToTopicId.ContainsKey(topicFieldKey))
{
continue;
}
var topicId = _topicNameToTopicId[topicFieldKey];
// remove incase it is already present
UpdateChangedTopic(topicId, parsedMessage[fieldName]);
}
}
// add in the admin fields
AddAdminFieldUpdates(topicKey, parsedMessage);
}
