public void SubscriptionWithExistingCursorGetsAllMessagesAfterMessageBusRestart()
{
var sp = ServiceProviderHelper.CreateServiceProvider();
using (var bus = (MessageBus)sp.GetRequiredService <IMessageBus>())
{
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 SubscribingTopicAfterNoSubscriptionsStateSetsStateToHasSubscription()
{
var sp = ServiceProviderHelper.CreateServiceProvider(services =>
{
services.Configure <MessageBusOptions>(options =>
{
options.TopicTTL = TopicTtl(TimeSpan.FromSeconds(6));
});
});
using (var bus = (MessageBus)sp.GetRequiredService <IMessageBus>())
{
var subscriber = new TestSubscriber(new[] { "key" });
// Make sure the topic is in the no subs state
bus.Subscribe(subscriber, null, (result, state) => TaskAsyncHelper.True, 10, null)
.Dispose();
Topic topic = bus.SubscribeTopic("key");
Assert.Equal(1, bus.Topics.Count);
Assert.True(bus.Topics.TryGetValue("key", out topic));
Assert.Equal(TopicState.HasSubscriptions, topic.State);
}
}
public void MultipleSubscribeTopicCallsToDeadTopicWork()
{
var sp = ServiceProviderHelper.CreateServiceProvider(services =>
{
services.Configure <MessageBusOptions>(options =>
{
options.TopicTTL = TopicTtl(TimeSpan.FromSeconds(6));
});
});
Topic topic;
using (var bus = ActivatorUtilities.CreateInstance <TestMessageBus>(sp))
{
var subscriber = new TestSubscriber(new[] { "key" });
int count = 0;
// Make sure the topic is in the no subs state
bus.Subscribe(subscriber, null, (result, state) => TaskAsyncHelper.True, 10, null)
.Dispose();
bus.BeforeTopicCreated = (key) =>
{
bus.Topics.TryGetValue(key, out topic);
if (count == 1)
{
// Should have been removed by our double garbage collect in BeforeTopicMarked
Assert.Null(topic);
}
if (count == 3)
{
// Ensure that we have a topic now created from the original thread
Assert.NotNull(topic);
}
};
bus.BeforeTopicMarked = (key, t) =>
{
count++;
if (count == 1)
{
bus.GarbageCollectTopics();
bus.GarbageCollectTopics();
// We garbage collect twice to mark the current topic as dead (it will remove it from the topics list)
Assert.Equal(t.State, TopicState.Dead);
bus.SubscribeTopic("key");
// Topic should still be dead
Assert.Equal(t.State, TopicState.Dead);
Assert.Equal(count, 2);
// Increment up to 3 so we don't execute same code path in after marked
count++;
}
if (count == 2)
{
// We've just re-created the topic from the second bus.SubscribeTopic so we should have 0 subscriptions
Assert.Equal(t.State, TopicState.NoSubscriptions);
}
if (count == 4)
{
// Ensure that we pulled the already created subscription (therefore it has subscriptions)
Assert.Equal(t.State, TopicState.HasSubscriptions);
}
};
bus.AfterTopicMarked = (key, t, state) =>
{
if (count == 2)
{
// After re-creating the topic from the second bus.SubscribeTopic we should then move the topic state
// into the has subscriptions state
Assert.Equal(state, TopicState.HasSubscriptions);
}
if (count == 3)
{
Assert.Equal(state, TopicState.Dead);
}
};
bus.SubscribeTopic("key");
Assert.Equal(1, bus.Topics.Count);
Assert.True(bus.Topics.TryGetValue("key", out topic));
Assert.Equal(TopicState.HasSubscriptions, topic.State);
}
}
