/// <summary>
/// Computes the results and stores it in a reply message
/// </summary>
/// <param name="operation"></param>
/// <param name="leftOperand"></param>
/// <param name="rightOperand"></param>
/// <returns></returns>
private IMessage ProcessArithmeticExpression(short operation, Int32 leftOperand, Int32 rightOperand)
{
// Create the reply message
IMessage replyMessage = ContextFactory.Instance.CreateMessage();
replyMessage.DeliveryMode = MessageDeliveryMode.Direct;
IStreamContainer stream = SDTUtils.CreateStream(replyMessage, 256);
double? result = null;
try
{
switch ((int)operation)
{
case (int)Operation.DIVIDE:
result = (double)((double)leftOperand / (double)rightOperand);
break;
case (int)Operation.MINUS:
result = (double)(leftOperand - rightOperand);
break;
case (int)Operation.PLUS:
result = (double)(leftOperand + rightOperand);
break;
case (int)Operation.TIMES:
result = (double)(leftOperand * rightOperand);
break;
default:
result = null;
break;
}
if (result == null)
{
stream.AddBool(false);
}
else
{
double val = result.Value;
if (double.IsNaN(val) || double.IsInfinity(val))
{
stream.AddBool(false);
}
else
{
stream.AddBool(true);
stream.AddDouble(val);
}
}
} catch (Exception) {
stream.Rewind();
stream.AddBool(false);
}
Operation opEnum = (Operation)((int)operation);
if (Enum.IsDefined(typeof(Operation), (Int32)operation))
{
Console.WriteLine(ARITHMETIC_EXPRESSION, leftOperand, opEnum, rightOperand,
(result == null ? "operation failed" : result.ToString()));
}
else
{
Console.WriteLine(ARITHMETIC_EXPRESSION, leftOperand, "UNKNOWN", rightOperand,
(result == null ? "operation failed" : result.ToString()));
}
return(replyMessage);
}
/// <summary>
/// The main function in the sample.
/// </summary>
/// <param name="args"></param>
public override void SampleCall(string[] args)
{
#region Parse Arguments
ArgParser cmdLineParser = new ArgParser();
if (!cmdLineParser.Parse(args))
{
// parse failed
PrintUsage(INVALID_ARGUMENTS_ERROR);
return;
}
#endregion
#region Initialize properties from command line
// Initialize the properties.
ContextProperties contextProps = new ContextProperties();
SessionProperties sessionProps = SampleUtils.NewSessionPropertiesFromConfig(cmdLineParser.Config);
#endregion
// Define IContext and ISession and ITopic.
IContext context = null;
ISession session = null;
ITopic topic = null;
try
{
InitContext(cmdLineParser.LogLevel);
Console.WriteLine("About to create the Context ...");
context = ContextFactory.Instance.CreateContext(contextProps, null);
Console.WriteLine("Context successfully created. ");
Console.WriteLine("About to create the Session ...");
session = context.CreateSession(sessionProps,
PrintReceivedMessage,
SampleUtils.HandleSessionEvent);
Console.WriteLine("Session successfully created.");
Console.WriteLine("About to connect the Session ...");
if (session.Connect() == ReturnCode.SOLCLIENT_OK)
{
Console.WriteLine("Session successfully connected");
Console.WriteLine(GetRouterInfo(session));
}
topic = ContextFactory.Instance.CreateTopic(SampleUtils.SAMPLE_TOPIC);
Console.WriteLine("About to subscribe to topic " + SampleUtils.SAMPLE_TOPIC);
if (session.Subscribe(topic, true) == ReturnCode.SOLCLIENT_OK)
{
Console.WriteLine("Successfully added topic subscription");
}
// Create the message independent stream.
IStreamContainer stream = SDTUtils.CreateStream(1024);
// Populate the stream.
stream.AddDouble(3.141592654);
stream.AddString("message");
// Create the message-independent map.
IMapContainer map = SDTUtils.CreateMap(1024);
// Add a well known integer to the map.
map.AddInt32("mersenne", 43112609);
// Create the message.
IMessage message = ContextFactory.Instance.CreateMessage();
// Set the message delivery options.
message.DeliveryMode = MessageDeliveryMode.Direct;
message.Destination = topic;
int numMsgsToSend = 10;
Console.WriteLine(string.Format("About to send {0} messages ...", numMsgsToSend));
for (int i = 0; i < numMsgsToSend; i++)
{
// Overwrite the "message" field, set the container, and send.
map.DeleteField("message");
map.AddString("message", "message" + (i + 1));
// Set the user property map to the map.
message.UserPropertyMap = map;
SDTUtils.SetSDTContainer(message, stream);
session.Send(message);
}
// Dispose of the map, stream, and message.
map.Dispose();
stream.Dispose();
message.Dispose();
Thread.Sleep(500); // wait for 0.5 seconds
Console.WriteLine("\nDone");
}
catch (Exception ex)
{
PrintException(ex);
}
finally
{
if (session != null)
{
if (topic != null)
{
session.Unsubscribe(topic, true);
}
session.Dispose();
}
if (context != null)
{
context.Dispose();
}
// Must cleanup after.
CleanupContext();
}
}