public void VerifyFailoverWithLoadBalancing()
{
var numberOfMessages = 12;
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default);
var latch = new CountdownEvent(numberOfMessages);
var handler1 = new TestHandler(latch);
var handler2 = new TestHandler(latch);
var handler3 = new TestHandler(latch);
channel.Subscribe(handler1);
channel.Subscribe(handler2);
channel.Subscribe(handler3);
handler2.ShouldFail = true;
for (var i = 0; i < numberOfMessages; i++)
{
channel.Send(Message.Create("test-" + i));
}
Assert.True(latch.Wait(3000));
Assert.NotNull(handler1.Thread);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, handler1.Thread.ManagedThreadId);
Assert.NotNull(handler2.Thread);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, handler2.Thread.ManagedThreadId);
Assert.NotNull(handler3.Thread);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, handler3.Thread.ManagedThreadId);
Assert.Equal(4, handler1.Count);
Assert.Equal(0, handler2.Count);
Assert.Equal(8, handler3.Count);
}
public void HandlerThrowsExceptionExecutorChannel()
{
services.AddSingleton <IDestinationResolver <IMessageChannel>, DefaultMessageChannelDestinationResolver>();
services.AddSingleton <IMessageBuilderFactory, DefaultMessageBuilderFactory>();
services.AddSingleton <IMessageChannel>((p) => new DirectChannel(p.GetService <IApplicationContext>(), "errorChannel"));
var provider = services.BuildServiceProvider();
var defaultErrorChannel = provider.GetService <IMessageChannel>() as DirectChannel;
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default);
var resultHandler = new ResultHandler(latch);
var throwingHandler = new ThrowMessageExceptionHandler();
channel.Subscribe(throwingHandler);
defaultErrorChannel.Subscribe(resultHandler);
var message = IntegrationMessageBuilder.WithPayload("test").Build();
channel.Send(message);
Assert.True(latch.Wait(10000));
var errorMessage = resultHandler.LastMessage;
Assert.IsType <MessagingException>(errorMessage.Payload);
var exceptionPayload = (MessagingException)errorMessage.Payload;
Assert.IsType <NotSupportedException>(exceptionPayload.InnerException);
Assert.Same(message, exceptionPayload.FailedMessage);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, resultHandler.LastThread.ManagedThreadId);
}
public void InterceptorWithException()
{
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default);
var message = Message.Create("foo");
var mockHandler = new Mock <IMessageHandler>();
var expected = new InvalidOperationException("Fake exception");
var latch = new CountdownEvent(2);
mockHandler.Setup((h) => h.HandleMessage(message)).Throws(expected);
var interceptor = new BeforeHandleInterceptor(latch);
channel.AddInterceptor(interceptor);
channel.Subscribe(mockHandler.Object);
try
{
channel.Send(message);
}
catch (MessageDeliveryException actual)
{
Assert.Same(expected, actual.InnerException);
}
Assert.True(latch.Wait(3000));
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.AfterHandledInvoked);
}
public void RoundRobinLoadBalancing()
{
var numberOfMessages = 12;
var channel = new TaskSchedulerChannel(provider, TaskScheduler.Default);
var latch = new CountdownEvent(numberOfMessages);
var handler1 = new TestHandler(latch);
var handler2 = new TestHandler(latch);
var handler3 = new TestHandler(latch);
channel.Subscribe(handler1);
channel.Subscribe(handler2);
channel.Subscribe(handler3);
for (var i = 0; i < numberOfMessages; i++)
{
channel.Send(new GenericMessage("test-" + i));
}
Assert.True(latch.Wait(3000));
Assert.NotNull(handler1.Thread);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, handler1.Thread.ManagedThreadId);
Assert.NotNull(handler2.Thread);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, handler2.Thread.ManagedThreadId);
Assert.NotNull(handler3.Thread);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, handler3.Thread.ManagedThreadId);
Assert.Equal(4, handler1.Count);
Assert.Equal(4, handler2.Count);
Assert.Equal(4, handler3.Count);
}
public void VerifyDifferentThread()
{
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default);
var latch = new CountdownEvent(1);
var handler = new TestHandler(latch);
channel.Subscribe(handler);
channel.Send(Message.Create("test"));
Assert.True(latch.Wait(1000));
Assert.NotNull(handler.Thread);
Assert.NotEqual(Thread.CurrentThread.ManagedThreadId, handler.Thread.ManagedThreadId);
}
public void FailoverNoLoadBalancingWithExecutorConcurrent()
{
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default, null, null);
channel.Failover = true;
var dispatcher = channel.Dispatcher;
dispatcher.AddHandler(handlerA.Object);
dispatcher.AddHandler(handlerB.Object);
dispatcher.AddHandler(handlerC.Object);
handlerA.Setup((h) => h.HandleMessage(message)).Callback(() =>
{
failed = 1;
var e = new Exception();
throw e;
});
handlerB.Setup((h) => h.HandleMessage(message)).Callback(() =>
{
allDone.Signal();
});
void MessageSenderTask()
{
try
{
start.Wait();
}
catch (Exception)
{
throw;
}
channel.Send(message);
}
for (var i = 0; i < TOTAL_EXECUTIONS; i++)
{
Task.Run(MessageSenderTask);
}
start.Signal();
Assert.True(allDone.Wait(10000));
handlerA.Verify((h) => h.HandleMessage(message), Times.Exactly(TOTAL_EXECUTIONS));
handlerB.Verify((h) => h.HandleMessage(message), Times.Exactly(TOTAL_EXECUTIONS));
handlerC.Verify((h) => h.HandleMessage(message), Times.Never());
}
public void NoFailoverNoLoadBalancingWithExecutorConcurrent()
{
var channel = new TaskSchedulerChannel(provider, TaskScheduler.Default, null, "noLoadBalancerNoFailoverExecutor", null);
channel.Failover = false;
handlerA.Setup((h) => h.HandleMessage(message)).Callback(() =>
{
var e = new Exception();
allDone.Signal();
failed = 1;
exceptionRegistry.Object.Add(e);
throw e;
});
var dispatcher = channel.Dispatcher;
dispatcher.AddHandler(handlerA.Object);
dispatcher.AddHandler(handlerB.Object);
void MessageSenderTask()
{
try
{
start.Wait();
}
catch (Exception)
{
throw;
}
channel.Send(message);
}
for (var i = 0; i < TOTAL_EXECUTIONS; i++)
{
Task.Run(MessageSenderTask);
}
start.Signal();
Assert.True(allDone.Wait(10000));
Assert.Equal(1, failed);
handlerA.Verify((h) => h.HandleMessage(message), Times.Exactly(TOTAL_EXECUTIONS));
handlerB.Verify((h) => h.HandleMessage(message), Times.Exactly(0));
exceptionRegistry.Verify((list) => list.Add(It.IsAny <Exception>()), Times.Exactly(TOTAL_EXECUTIONS));
}
public void InterceptorWithModifiedMessage()
{
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default);
var mockHandler = new Mock <IMessageHandler>();
var mockExpected = new Mock <IMessage>();
var latch = new CountdownEvent(2);
var interceptor = new BeforeHandleInterceptor(latch);
interceptor.MessageToReturn = mockExpected.Object;
channel.AddInterceptor(interceptor);
channel.Subscribe(mockHandler.Object);
channel.Send(Message.Create("foo"));
Assert.True(latch.Wait(10000));
mockHandler.Verify((h) => h.HandleMessage(mockExpected.Object));
Assert.Equal(1, interceptor.Counter);
Assert.True(interceptor.AfterHandledInvoked);
}
public void NoFailoverLoadBalancingWithExecutorConcurrent()
{
var channel = new TaskSchedulerChannel(provider.GetService <IApplicationContext>(), TaskScheduler.Default, null);
channel.Failover = false;
var dispatcher = channel.Dispatcher;
dispatcher.AddHandler(handlerA.Object);
dispatcher.AddHandler(handlerB.Object);
dispatcher.AddHandler(handlerC.Object);
var start1 = new CountdownEvent(1);
var allDone1 = new CountdownEvent(TOTAL_EXECUTIONS);
var message2 = message;
var failed1 = 0;
handlerA.Setup((h) => h.HandleMessage(message)).Callback(() =>
{
failed1 = 1;
var e = new Exception();
exceptionRegistry.Object.Add(e);
allDone1.Signal();
throw e;
});
handlerB.Setup((h) => h.HandleMessage(message)).Callback(() =>
{
allDone1.Signal();
});
handlerC.Setup((h) => h.HandleMessage(message)).Callback(() =>
{
allDone1.Signal();
});
void MessageSenderTask()
{
try
{
start1.Wait();
}
catch (Exception)
{
throw;
}
channel.Send(message);
}
for (var i = 0; i < TOTAL_EXECUTIONS; i++)
{
Task.Run(MessageSenderTask);
}
start1.Signal();
Assert.True(allDone1.Wait(10000));
Assert.Equal(1, failed1);
handlerA.Verify((h) => h.HandleMessage(message2), Times.Exactly(14));
handlerB.Verify((h) => h.HandleMessage(message2), Times.Exactly(13));
handlerC.Verify((h) => h.HandleMessage(message2), Times.Exactly(13));
exceptionRegistry.Verify((list) => list.Add(It.IsAny <Exception>()), Times.Exactly(14));
}
