static void Main(string[] args)
{
if(args.Length != 1)
{
Console.WriteLine(
"expecting one parameter: " +
"publisher destination");
return;
}
string publisherAddress = args[0];
try
{
ValuePublisher randomValue =
new ValuePublisher();
Agent publisherAgent = new Agent();
string resolvedAddress =
publisherAgent.AddListener(publisherAddress);
Console.WriteLine(
"The publisher is listening on {0}",
resolvedAddress);
publisherAgent.RegisterValuePublisher(
"random_number", randomValue);
// publish random values forever
Parameters content = new Parameters();
Random generator = new Random();
while(true)
{
int random = generator.Next(0, 100);
content.SetInteger("value", random);
Console.WriteLine("publishing value {0}",
random);
randomValue.Publish(content);
Thread.Sleep(1000);
}
}
catch(Exception ex)
{
Console.WriteLine(
"error: {0}", ex.Message);
}
}
public void testSubscribeUnsubscribe()
{
Agent publisherAgent = new Agent();
string publisherAddress =
publisherAgent.AddListener(localAddress);
ValuePublisher value = new ValuePublisher();
publisherAgent.RegisterValuePublisher("my_value", value);
// no subscribers yet
Assert.AreEqual(0, value.NumberOfSubscribers);
Assert.AreEqual(0, value.Subscribers.Count);
// set up the subscriber side
bool gotUpdate = false;
Agent subscriberAgent = new Agent();
subscriberAgent.RegisterObject("my_update_handler",
delegate(object sender, IncomingMessageArgs args)
{
Assert.AreEqual("subscription_update",
args.Message.MessageName);
gotUpdate = true;
});
// subscribe
Parameters parameters = new Parameters();
parameters.SetString("destination_object", "my_update_handler");
OutgoingMessage subscribeMsg = subscriberAgent.Send(
publisherAddress, "my_value", "subscribe", parameters);
subscribeMsg.WaitForCompletion();
// there should be one subscriber, as seen at the publisher side
Assert.AreEqual(1, value.NumberOfSubscribers);
Assert.AreEqual(1, value.Subscribers.Count);
Assert.AreEqual("my_update_handler",
value.Subscribers[0].DestinationObject);
// publish some value
Parameters dummy = new Parameters();
value.Publish(dummy);
// check if the listener got it
pause();
Assert.IsTrue(gotUpdate);
// unsubscribe
OutgoingMessage unsubscribeMsg = subscriberAgent.Send(
publisherAddress, "my_value", "unsubscribe", null);
unsubscribeMsg.WaitForCompletion();
// there should be no subscribers
Assert.AreEqual(0, value.NumberOfSubscribers);
Assert.AreEqual(0, value.Subscribers.Count);
// check that the updates do not arrive any longer
gotUpdate = false;
value.Publish(dummy);
pause();
Assert.IsFalse(gotUpdate);
value.Close();
subscriberAgent.Close();
publisherAgent.Close();
}