|
public Publish ( |
||
| message | The message to publish. | |
| return | Task | |
public void NewSubscriptionGetsAllMessages()
{
var dr = new DefaultDependencyResolver();
using (var bus = new MessageBus(dr))
{
var subscriber = new TestSubscriber(new[] { "key" });
var wh = new ManualResetEventSlim(initialState: false);
IDisposable subscription = null;
try
{
bus.Publish("test", "key", "1").Wait();
subscription = bus.Subscribe(subscriber, null, (result, state) =>
{
if (!result.Terminal)
{
var m = result.GetMessages().Single();
Assert.Equal("key", m.Key);
Assert.Equal("value", m.GetString());
wh.Set();
return TaskAsyncHelper.True;
}
return TaskAsyncHelper.False;
}, 10, null);
bus.Publish("test", "key", "value").Wait();
Assert.True(wh.Wait(TimeSpan.FromSeconds(5)));
}
finally
{
if (subscription != null)
{
subscription.Dispose();
}
}
}
}
public static IDisposable Run(int connections, int senders, string payload, int messageBufferSize = 10)
{
var resolver = new DefaultDependencyResolver();
var bus = new MessageBus(resolver);
var countDown = new CountdownEvent(senders);
var subscriptions = new List<IDisposable>();
var cancellationTokenSource = new CancellationTokenSource();
// Initialize performance counters for this run
Utility.InitializePerformanceCounters(resolver, cancellationTokenSource.Token);
for (int i = 0; i < connections; i++)
{
string identity = i.ToString();
var subscriber = new Subscriber(identity, new[] { "a", "b", "c" });
IDisposable subscription = bus.Subscribe(subscriber,
cursor: null,
callback: _ => TaskAsyncHelper.True,
maxMessages: messageBufferSize);
subscriptions.Add(subscription);
}
for (var i = 0; i < senders; i++)
{
ThreadPool.QueueUserWorkItem(_ =>
{
while (!cancellationTokenSource.IsCancellationRequested)
{
string source = i.ToString();
bus.Publish(source, "a", payload);
}
countDown.Signal();
});
}
return new DisposableAction(() =>
{
cancellationTokenSource.Cancel();
// Wait for all senders to stop
countDown.Wait(TimeSpan.FromMilliseconds(1000 * senders));
// Shut the bus down and wait for workers to stop
bus.Dispose();
// Dispose of all the subscriptions
subscriptions.ForEach(s => s.Dispose());
});
}
public void AddingEventAndSendingMessages()
{
var dr = new DefaultDependencyResolver();
using (var bus = new MessageBus(dr))
{
var subscriber = new TestSubscriber(new[] { "a" });
int max = 100;
var cd = new CountDownRange<int>(Enumerable.Range(0, max));
int prev = -1;
IDisposable subscription = null;
try
{
subscription = bus.Subscribe(subscriber, null, result =>
{
foreach (var m in result.GetMessages())
{
int n = Int32.Parse(m.Value);
Assert.True(prev < n, "out of order");
prev = n;
Assert.True(cd.Mark(n));
}
return TaskAsyncHelper.True;
}, 10);
for (int i = 0; i < max; i++)
{
subscriber.AddEvent("b");
bus.Publish("test", "b", i.ToString()).Wait();
}
Assert.True(cd.Wait(TimeSpan.FromSeconds(10)));
}
finally
{
if (subscription != null)
{
subscription.Dispose();
}
}
}
}
public void PublishingDoesNotCreateTopic()
{
var dr = new DefaultDependencyResolver();
var configuration = dr.Resolve<IConfigurationManager>();
configuration.KeepAlive = null;
using (var bus = new MessageBus(dr))
{
bus.Publish("test", "key", "1").Wait();
Assert.Equal(0, bus.Topics.Count);
Assert.False(bus.Topics.ContainsKey("key"));
}
}
public void SubscriptionWithCancelledTaskCanBeDisposed()
{
var dr = new DefaultDependencyResolver();
using (var bus = new MessageBus(dr))
{
var subscriber = new TestSubscriber(new[] { "key" });
var wh = new ManualResetEventSlim();
IDisposable subscription = bus.Subscribe(subscriber, null, async (result, state) =>
{
if (result.Terminal)
{
return false;
}
await Task.Delay(50);
var tcs = new TaskCompletionSource<bool>();
tcs.SetCanceled();
wh.Set();
return await tcs.Task;
}, 10, null);
bus.Publish("me", "key", "hello");
wh.Wait();
subscription.Dispose();
}
}
public void SubscriptionWithScaleoutCursorGetsOnlyNewMessages()
{
var dr = new DefaultDependencyResolver();
var passThroughMinfier = new PassThroughStringMinifier();
dr.Register(typeof(IStringMinifier), () => passThroughMinfier);
using (var bus = new MessageBus(dr))
{
Func<ISubscriber> subscriberFactory = () => new TestSubscriber(new[] { "key" });
var tcs = new TaskCompletionSource<Message[]>();
IDisposable subscription = null;
try
{
// Set-up dummy subscription so the first Publish doesn't noop
bus.Subscribe(subscriberFactory(), null, (result, state) => TaskAsyncHelper.True, 10, null).Dispose();
bus.Publish("test", "key", "badvalue").Wait();
subscription = bus.Subscribe(subscriberFactory(), "s-key,00000000", (result, state) =>
{
tcs.TrySetResult(result.GetMessages().ToArray());
return TaskAsyncHelper.True;
}, 10, null);
bus.Publish("test", "key", "value");
Assert.True(tcs.Task.Wait(TimeSpan.FromSeconds(5)));
foreach (var m in tcs.Task.Result)
{
Assert.Equal("key", m.Key);
Assert.Equal("value", m.GetString());
}
}
finally
{
if (subscription != null)
{
subscription.Dispose();
}
}
}
}
public void SubscriptionWithExistingCursorGetsAllMessagesAfterMessageBusRestart()
{
var dr = new DefaultDependencyResolver();
using (var bus = new MessageBus(dr))
{
var subscriber = new TestSubscriber(new[] { "key" });
var wh = new ManualResetEvent(false);
IDisposable subscription = null;
try
{
subscription = bus.Subscribe(subscriber, "d-key,00000001", (result, state) =>
{
foreach (var m in result.GetMessages())
{
Assert.Equal("key", m.Key);
Assert.Equal("value", m.GetString());
wh.Set();
}
return TaskAsyncHelper.True;
}, 10, null);
bus.Publish("test", "key", "value");
Assert.True(wh.WaitOne(TimeSpan.FromSeconds(5)));
}
finally
{
if (subscription != null)
{
subscription.Dispose();
}
}
}
}
public void SubscriptionWithMultipleExistingCursors()
{
var dr = new DefaultDependencyResolver();
var passThroughMinfier = new PassThroughStringMinifier();
dr.Register(typeof(IStringMinifier), () => passThroughMinfier);
using (var bus = new MessageBus(dr))
{
Func<ISubscriber> subscriberFactory = () => new TestSubscriber(new[] { "key", "key2" });
var cdKey = new CountDownRange<int>(Enumerable.Range(2, 4));
var cdKey2 = new CountDownRange<int>(new[] { 1, 2, 10 });
IDisposable subscription = null;
string prefix = DefaultSubscription._defaultCursorPrefix;
// Pretend like we had an initial subscription
bus.Subscribe(subscriberFactory(), null, (result, state) => TaskAsyncHelper.True, 10, null)
.Dispose();
// This simulates a reconnect
bus.Publish("test", "key", "1").Wait();
bus.Publish("test", "key", "2").Wait();
bus.Publish("test", "key", "3").Wait();
bus.Publish("test", "key", "4").Wait();
bus.Publish("test", "key2", "1").Wait();
bus.Publish("test", "key2", "2").Wait();
try
{
subscription = bus.Subscribe(subscriberFactory(), prefix + "key,00000001|key2,00000000", (result, state) =>
{
foreach (var m in result.GetMessages())
{
int n = Int32.Parse(m.GetString());
if (m.Key == "key")
{
Assert.True(cdKey.Mark(n));
}
else
{
Assert.True(cdKey2.Mark(n));
}
}
return TaskAsyncHelper.True;
}, 10, null);
bus.Publish("test", "key", "5");
bus.Publish("test", "key2", "10");
Assert.True(cdKey.Wait(TimeSpan.FromSeconds(5)));
Assert.True(cdKey2.Wait(TimeSpan.FromSeconds(5)));
}
finally
{
if (subscription != null)
{
subscription.Dispose();
}
}
}
}
public void DisposingBusShutsWorkersDown()
{
var dr = new DefaultDependencyResolver();
var bus = new MessageBus(dr);
var subscriber = new TestSubscriber(new[] { "key" });
var wh = new ManualResetEventSlim(initialState: false);
IDisposable subscription = null;
try
{
subscription = bus.Subscribe(subscriber, null, result =>
{
if (!result.Terminal)
{
var m = result.GetMessages().Single();
Assert.Equal("key", m.Key);
Assert.Equal("value", m.Value);
wh.Set();
return TaskAsyncHelper.True;
}
return TaskAsyncHelper.False;
}, 10);
bus.Publish("test", "key", "value").Wait();
Assert.True(wh.Wait(TimeSpan.FromSeconds(5)));
}
finally
{
if (subscription != null)
{
subscription.Dispose();
}
Assert.Equal(bus.AllocatedWorkers, 1);
bus.Dispose();
Assert.Equal(bus.AllocatedWorkers, 0);
}
}
public void SubscriptionWithExistingCursor()
{
var dr = new DefaultDependencyResolver();
var passThroughMinfier = new PassThroughStringMinifier();
dr.Register(typeof(IStringMinifier), () => passThroughMinfier);
using (var bus = new MessageBus(dr))
{
var subscriber = new TestSubscriber(new[] { "key" });
var cd = new CountDownRange<int>(Enumerable.Range(2, 4));
IDisposable subscription = null;
// Pretend like we had an initial subscription
bus.Subscribe(subscriber, null, _ => TaskAsyncHelper.True, 10)
.Dispose();
bus.Publish("test", "key", "1").Wait();
bus.Publish("test", "key", "2").Wait();
bus.Publish("test", "key", "3").Wait();
bus.Publish("test", "key", "4").Wait();
try
{
subscription = bus.Subscribe(subscriber, "key,00000001", result =>
{
foreach (var m in result.GetMessages())
{
int n = Int32.Parse(m.Value);
Assert.True(cd.Mark(n));
}
return TaskAsyncHelper.True;
}, 10);
bus.Publish("test", "key", "5");
Assert.True(cd.Wait(TimeSpan.FromSeconds(5)));
}
finally
{
if (subscription != null)
{
subscription.Dispose();
}
}
}
}