public void Stop()
{
base.Stop();
TotalUsers = UserSessions.Count;
double totalTime = 0.0;
foreach (UserSession u in UserSessions)
{
totalTime += u.SessionLength;
}
AverageTimePerUser = totalTime / TotalUsers;
TelemetrySerializer.SerializeRoomSession(this);
}
internal ServerTelemetryChannel(INetwork network, IApplicationLifecycle applicationLifecycle)
{
var policies = new TransmissionPolicy[]
{
new ApplicationLifecycleTransmissionPolicy(applicationLifecycle),
new ErrorHandlingTransmissionPolicy(),
new NetworkAvailabilityTransmissionPolicy(network),
new ThrottlingTransmissionPolicy()
};
this.Transmitter = new Transmitter(policies: policies);
this.TelemetrySerializer = new TelemetrySerializer(this.Transmitter);
this.TelemetryBuffer = new Implementation.TelemetryBuffer(this.TelemetrySerializer, applicationLifecycle);
this.telemetryBufferCapacity = this.TelemetryBuffer.Capacity;
this.TelemetryProcessor = this.TelemetryBuffer;
}
internal ServerTelemetryChannel(INetwork network, IApplicationLifecycle applicationLifecycle)
{
var policies = new TransmissionPolicy[]
{
#if !NETSTANDARD
// We don't have implementation for IApplicationLifecycle for .NET Core
new ApplicationLifecycleTransmissionPolicy(applicationLifecycle),
#endif
new ThrottlingTransmissionPolicy(),
new ErrorHandlingTransmissionPolicy(),
new PartialSuccessTransmissionPolicy(),
new NetworkAvailabilityTransmissionPolicy(network),
};
this.Transmitter = new Transmitter(policies: policies);
this.TelemetrySerializer = new TelemetrySerializer(this.Transmitter);
this.TelemetryBuffer = new TelemetryBuffer(this.TelemetrySerializer, applicationLifecycle);
this.telemetryBufferCapacity = this.TelemetryBuffer.Capacity;
this.TelemetryProcessor = this.TelemetryBuffer;
this.isInitialized = false;
}
private static async Task GenerateTelemetryAsync <T>(Func <T, string, bool, T> factory,
ObjectPool <EventHubClient> pool, TelemetrySerializer <T> serializer, int randomSeed, AsyncConsole console, int generateKeyframeGap, int simulatedDelayInMs, int waittime, string deviceId) where T : class
{
if (factory == null)
{
throw new ArgumentNullException(nameof(factory));
}
if (pool == null)
{
throw new ArgumentNullException(nameof(pool));
}
if (console == null)
{
throw new ArgumentNullException(nameof(console));
}
if (waittime > 0)
{
TimeSpan span = TimeSpan.FromMilliseconds(waittime);
await Task.Delay(span);
}
if (deviceId == null)
{
throw new ArgumentNullException(nameof(deviceId));
}
Random random = new Random(randomSeed);
// buffer block that holds the messages . consumer will fetch records from this block asynchronously.
BufferBlock <T> buffer = new BufferBlock <T>(new DataflowBlockOptions()
{
BoundedCapacity = 100000
});
// consumer that sends the data to event hub asynchronoulsy.
var consumer = new ActionBlock <T>(
action: (t) =>
{
using (var client = pool.GetObject())
{
return(client.Value.SendAsync(new EventData(serializer.Serialize(t))).ContinueWith(
async task =>
{
cts.Cancel();
await console.WriteLine(task.Exception.InnerException.Message);
await console.WriteLine($"event hub client failed for {deviceId}");
}, TaskContinuationOptions.OnlyOnFaulted
));
}
},
new ExecutionDataflowBlockOptions
{
BoundedCapacity = 100000,
CancellationToken = cts.Token,
MaxDegreeOfParallelism = 100,
}
);
// link the buffer to consumer .
buffer.LinkTo(consumer, new DataflowLinkOptions()
{
PropagateCompletion = true
});
long messages = 0;
List <Task> taskList = new List <Task>();
T telemetryObject = null;
T lastKeyFrameTelemetryObject = null;
bool keyFrame = true;
var generateTask = Task.Factory.StartNew(
async() =>
{
// generate telemetry records and send them to buffer block
for (; ;)
{
telemetryObject = factory(lastKeyFrameTelemetryObject, deviceId, keyFrame);
await buffer.SendAsync(telemetryObject).ConfigureAwait(false);
// Save the last key frame for stateful generation
if (keyFrame)
{
lastKeyFrameTelemetryObject = telemetryObject;
// Turn key frame off after sending a key frame
keyFrame = false;
}
if (++messages % generateKeyframeGap == 0)
{
await console.WriteLine($"Created records for {deviceId} - generating key frame").ConfigureAwait(false);
// since rec is changing, makes sense to generate a key frame
keyFrame = true;
}
else
{
await console.WriteLine($"Created {messages} records for {deviceId}").ConfigureAwait(false);
// Wait for given number of milliseconds after each messaage
await Task.Delay(simulatedDelayInMs).ConfigureAwait(false);
}
// Every few messages, send a key frame randomly
if (messages % random.Next(10, 100) == 0)
{
keyFrame = true;
}
if (cts.IsCancellationRequested)
{
break;
}
}
buffer.Complete();
await Task.WhenAll(buffer.Completion, consumer.Completion);
await console.WriteLine($"Created total {messages} records for {deviceId}").ConfigureAwait(false);
}
).Unwrap().ContinueWith(
async task =>
{
cts.Cancel();
await console.WriteLine($"failed to generate telemetry for {deviceId}").ConfigureAwait(false);
await console.WriteLine(task.Exception.InnerException.Message).ConfigureAwait(false);
}, TaskContinuationOptions.OnlyOnFaulted
);
// await on consumer completion. Incase if sending is failed at any moment ,
// exception is thrown and caught . This is used to signal the cancel the reading operation and abort all activity further
try
{
await Task.WhenAll(consumer.Completion, generateTask);
}
catch (Exception ex)
{
cts.Cancel();
await console.WriteLine(ex.Message).ConfigureAwait(false);
await console.WriteLine($"failed to generate telemetry").ConfigureAwait(false);
throw;
}
}
public TelemetryBufferWhichDoesNothingOnFlush(TelemetrySerializer serializer, IApplicationLifecycle applicationLifecycle) : base(serializer, applicationLifecycle)
{
}
