/// <summary>
/// Start the broker simulation.
/// </summary>
public static void Start()
{
// Create a thread for each simulated broker. Use a pool of predefined brokers to give each broker thread a personality.
for (Int32 threadIndex = 0; threadIndex < BrokerSimulator.brokerThreadCount; threadIndex++)
{
// The BrokerContext is a structure that simulates a broker, including the connections a broker would have back to the source of the orders. When
// the broker simulator is shut down or suspended, those threads and web services need to be disposed of.
BrokerInfo brokerInfo = BrokerSimulator.brokerList[threadIndex];
BrokerSimulator.brokerContexts[brokerInfo.Symbol] = new BrokerContext(brokerInfo);
// These threads will simulate the various brokers.
BrokerSimulator.brokerSimulationThreads[threadIndex] = new Thread(new ParameterizedThreadStart(BrokerSimulator.SimulateBroker));
BrokerSimulator.brokerSimulationThreads[threadIndex].Name = String.Format("{0} Thread", brokerInfo.Name);
BrokerSimulator.brokerSimulationThreads[threadIndex].Start(BrokerSimulator.brokerContexts[brokerInfo.Symbol]);
}
}
/// <summary>
/// Initializes a new instance of the BrokerContext class.
/// </summary>
public BrokerContext(BrokerInfo brokerInfo)
{
// Initialize the object.
this.nameField = brokerInfo.Name;
this.symbolField = brokerInfo.Symbol;
// This document contains the configuration of the connections used to route orders back to the source of the order.
XDocument xDocument = XDocument.Load(Environment.ExpandEnvironmentVariables(Settings.Default.SourceConfigurationFile));
// This will load in the properties of each of sources into a dictionary that is used to manage the stream of messages back to the source that
// originated the order.
foreach (XElement xElement in xDocument.Root.Elements("Source"))
{
// Don't bother to connect to the source if they aren't active.
Boolean isActive = Convert.ToBoolean(xElement.Attribute("IsActive").Value);
if (isActive)
{
// This provides an operating context for the connection back to the source of the order.
SourceContext sourceContext = new SourceContext();
// This is the name of the source.
String tenant = xElement.Attribute("Name").Value;
// This properties are used to connect us to a web service that will deliver the messages back to the source.
ClientInfo clientInfo = sourceContext.ClientInfo;
clientInfo.EndpointName = xElement.Attribute("Endpoint").Value;
clientInfo.Password = xElement.Attribute("Password").Value;
clientInfo.UserName = xElement.Attribute("UserName").Value;
// This thread will asynchronously pull messages out of the message queue and deliver them to the source.
Thread thread = new Thread(this.SourceThread);
thread.Start(sourceContext);
thread.Name = String.Format("{0} connection to {1}", brokerInfo.Symbol, tenant);
sourceContext.Thread = thread;
// This acts as a routing map to deliver messages back to the source of the orders based on the name of the source.
this.sourceContextMap.Add(tenant, sourceContext);
}
}
}