internal async Task RegisterMetrics_WhenServerReturns200Ok_ReturnsTrue(
UnleashSettings settings,
[Frozen] Mock <FakeHttpMessageHandler> httpMessageHandler,
[Frozen] UnleashApiClientRequestHeaders requestHeaders,
MetricsBucket metricsBucket
)
{
var jsonSerializerSettings = new NewtonsoftJsonSerializerSettings();
var jsonSerializer = new NewtonsoftJsonSerializer(jsonSerializerSettings);
httpMessageHandler.SetupPostSendMetricsRequestForSuccess(requestHeaders);
var httpClient = new HttpClient(httpMessageHandler.Object)
{
BaseAddress = settings.UnleashApi
};
var apiClient = new UnleashApiClient(httpClient, jsonSerializer, requestHeaders);
var threadSafeMetricsBucket = new ThreadSafeMetricsBucket(metricsBucket);
var successResult = await apiClient.SendMetrics(threadSafeMetricsBucket, CancellationToken.None);
Assert.True(successResult);
httpMessageHandler.VerifyAll();
}
internal async Task RegisterMetrics_WhenHttpExceptionOccurs_ReturnsFalse(
HttpStatusCode responseStatusCode,
string responseBody,
string responseContentType,
UnleashSettings settings,
[Frozen] Mock <FakeHttpMessageHandler> httpMessageHandler,
[Frozen] UnleashApiClientRequestHeaders requestHeaders,
MetricsBucket metricsBucket
)
{
var jsonSerializerSettings = new NewtonsoftJsonSerializerSettings();
var jsonSerializer = new NewtonsoftJsonSerializer(jsonSerializerSettings);
httpMessageHandler.SetupPostSendMetricsRequestForException(requestHeaders, responseStatusCode, responseBody, responseContentType);
var httpClient = new HttpClient(httpMessageHandler.Object)
{
BaseAddress = settings.UnleashApi
};
var apiClient = new UnleashApiClient(httpClient, jsonSerializer, requestHeaders);
var threadSafeMetricsBucket = new ThreadSafeMetricsBucket(metricsBucket);
var successResult = await apiClient.SendMetrics(threadSafeMetricsBucket, CancellationToken.None);
Assert.False(successResult);
httpMessageHandler.VerifyAll();
}
internal async Task ExecuteAsync_WhenHttpExceptionOccurs_CompletesSuccessfully(
HttpStatusCode statusCode,
string responseBody,
string responseContentType,
[Frozen] UnleashSettings settings,
[Frozen] Mock <FakeHttpMessageHandler> httpMessageHandler,
[Frozen] Mock <IUnleashApiClientFactory> apiClientFactoryMock,
[Frozen] UnleashApiClientRequestHeaders requestHeaders,
[Frozen] MetricsBucket metricsBucket)
{
var jsonSerializerSettings = new NewtonsoftJsonSerializerSettings();
var jsonSerializer = new NewtonsoftJsonSerializer(jsonSerializerSettings);
var threadSafeMetricsBucket = new ThreadSafeMetricsBucket(metricsBucket);
var backgroundTask = new ClientMetricsBackgroundTask(apiClientFactoryMock.Object, settings, threadSafeMetricsBucket);
httpMessageHandler.SetupPostSendMetricsRequestForException(requestHeaders, statusCode, responseBody, responseContentType);
var httpClient = new HttpClient(httpMessageHandler.Object)
{
BaseAddress = settings.UnleashApi
};
var apiClient = new UnleashApiClient(httpClient, jsonSerializer, requestHeaders);
apiClientFactoryMock.Setup(cf => cf.CreateClient()).Returns(apiClient);
await backgroundTask.ExecuteAsync(CancellationToken.None);
httpMessageHandler.VerifyAll();
apiClientFactoryMock.VerifyAll();
}
public void RegisterCount_WhenInvokedFromMultipleThreadsAndCheckedIncrementally_BehavesPredictably(int maxDegreeOfParallelism, long totalRegistrations, int featureToggleCount, double breakPercent)
{
var metricsBucket = new ThreadSafeMetricsBucket();
var options = new ParallelOptions
{
MaxDegreeOfParallelism = maxDegreeOfParallelism
};
var breaks = totalRegistrations * breakPercent;
var toggleCounter = 0L;
var recordedTasks = 0L;
var exceptions = new ConcurrentBag <Exception>();
var result = Parallel.For(1, totalRegistrations + 1, options, state =>
{
try
{
Interlocked.Increment(ref recordedTasks);
var toggleName = (state % featureToggleCount).ToString();
var active = DateTime.Now.Ticks % 2 == 0;
metricsBucket.RegisterCount(toggleName, active);
if (state % breaks == 0)
{
using (metricsBucket.StopCollectingMetrics(out var bucket))
{
var count = GetNumberOfRegistrations(bucket);
Interlocked.Add(ref toggleCounter, count);
_testOutputHelper.WriteLine($"Locking bucket at #{state} with {toggleCounter} toggle registrations");
}
}
public void SingleBucket_OneCountPerTask3()
{
var metricsBucket = new ThreadSafeMetricsBucket();
var options = new ParallelOptions
{
MaxDegreeOfParallelism = 10,
};
var totalTasks = 1000000L;
var breaks = totalTasks / 10;
long toggleCounter = 0;
long recordedTasks = 0;
var result = Parallel.For(1, totalTasks + 1, options, state =>
{
Interlocked.Increment(ref recordedTasks);
var toggleName = (state % 50).ToString();
var active = DateTime.Now.Ticks % 2 == 0;
metricsBucket.RegisterCount(toggleName, active);
if (state % breaks == 0)
{
using (metricsBucket.StopCollectingMetrics(out var bucket))
{
var count = GetNumberOfRegistrations(bucket);
Interlocked.Add(ref toggleCounter, count);
Console.WriteLine($"Locking bucket at #{state} with {toggleCounter} toggle registrations");
}
}
public void SingleBucket_No_WriteOperations()
{
var metricsBucket = new ThreadSafeMetricsBucket();
var options = new ParallelOptions
{
MaxDegreeOfParallelism = 50,
};
var totalTasks = 1000000;
var numFeatureToggles = 50;
Parallel.For(0, totalTasks, options, state =>
{
var i = (state % numFeatureToggles).ToString();
var predicate = DateTime.Now.Ticks % 2 == 0;
metricsBucket.RegisterCount(i, predicate);
});
using (metricsBucket.StopCollectingMetrics(out var bucket))
{
bucket.Toggles.Count.Should().Be(numFeatureToggles);
// Should be cleared
var count = GetNumberOfRegistrations(bucket);
count.Should().Be(totalTasks);
}
}
public UnleashServices(UnleashSettings settings, IRandom random, IUnleashApiClientFactory unleashApiClientFactory,
IUnleashScheduledTaskManager scheduledTaskManager, IToggleCollectionCache toggleCollectionCache,
IEnumerable <IStrategy> strategies)
{
this.Random = random ?? throw new ArgumentNullException(nameof(random));
this.scheduledTaskManager = scheduledTaskManager ?? throw new ArgumentNullException(nameof(scheduledTaskManager));
var settingsValidator = new UnleashSettingsValidator();
settingsValidator.Validate(settings);
StrategyMap = BuildStrategyMap(strategies?.ToArray() ?? new IStrategy[0]);
CancellationToken = cancellationTokenSource.Token;
var cachedFilesResult = toggleCollectionCache.Load(cancellationTokenSource.Token).GetAwaiter().GetResult();
cacheMiss = cachedFilesResult.IsCacheMiss;
ToggleCollection = new ThreadSafeToggleCollection
{
Instance = cachedFilesResult.InitialToggleCollection ?? new ToggleCollection()
};
MetricsBucket = new ThreadSafeMetricsBucket();
var scheduledTasks = CreateScheduledTasks(settings, unleashApiClientFactory, toggleCollectionCache, cachedFilesResult);
scheduledTaskManager.Configure(scheduledTasks, CancellationToken);
}
public ClientMetricsBackgroundTask(
IUnleashApiClient apiClient,
UnleashSettings settings,
ThreadSafeMetricsBucket metricsBucket)
{
this.apiClient = apiClient;
this.settings = settings;
this.metricsBucket = metricsBucket;
}
public async Task SendMetrics_WhenInvoked_CompletesSuccessfully()
{
var metricsBucket = new ThreadSafeMetricsBucket();
metricsBucket.RegisterCount("Demo123", true);
metricsBucket.RegisterCount("Demo123", false);
var result = await Client.SendMetrics(metricsBucket, CancellationToken.None);
Assert.True(result);
// Check result:
// http://unleash.herokuapp.com/#/features/view/Demo123
// http://unleash.herokuapp.com/api/admin/metrics/feature-toggles
}
public async Task SendMetrics_Success()
{
var metricsBucket = new ThreadSafeMetricsBucket();
metricsBucket.RegisterCount("Demo123", true);
metricsBucket.RegisterCount("Demo123", false);
var result = await api.SendMetrics(metricsBucket, CancellationToken.None);
result.Should().Be(true);
// Check result:
// http://unleash.herokuapp.com/#/features/view/Demo123
// http://unleash.herokuapp.com/api/admin/metrics/feature-toggles
}
public async Task <bool> SendMetrics(ThreadSafeMetricsBucket metrics, CancellationToken cancellationToken)
{
const string requestUri = "api/client/metrics";
var memoryStream = new MemoryStream();
using (metrics.StopCollectingMetrics(out var bucket))
{
jsonSerializer.Serialize(memoryStream, new ClientMetrics
{
AppName = clientRequestHeaders.AppName,
InstanceId = clientRequestHeaders.InstanceTag,
Bucket = bucket
});
}
return(await Post(requestUri, memoryStream, cancellationToken).ConfigureAwait(false));
}
public void RegisterCount_WhenInvokedFromMultipleThreadsAndCheckedAtCompletion_BehavesPredictably(int maxDegreeOfParallelism, int totalRegistrations, int featureToggleCount)
{
var metricsBucket = new ThreadSafeMetricsBucket();
var options = new ParallelOptions
{
MaxDegreeOfParallelism = maxDegreeOfParallelism
};
var exceptions = new ConcurrentBag <Exception>();
var result = Parallel.For(0, totalRegistrations, options, state =>
{
try
{
var toggleName = (state % featureToggleCount).ToString();
var active = DateTime.Now.Ticks % 2 == 0;
metricsBucket.RegisterCount(toggleName, active);
}
catch (Exception exc)
{
exceptions.Add(exc);
}
});
if (exceptions.Count > 0)
{
throw new AggregateException(exceptions);
}
Assert.True(result.IsCompleted);
using (metricsBucket.StopCollectingMetrics(out var bucket))
{
Assert.Equal(featureToggleCount, bucket.Toggles.Count);
var actualRegistrations = GetNumberOfRegistrations(bucket);
Assert.Equal(totalRegistrations, actualRegistrations);
}
}
public Task <bool> SendMetrics(ThreadSafeMetricsBucket metricsBucket, CancellationToken cancellationToken)
{
return(Task.FromResult(true));
}
public UnleashServices(UnleashSettings settings, Dictionary <string, IStrategy> strategyMap)
{
var fileSystem = settings.FileSystem ?? new FileSystem(settings.Encoding);
var backupFile = settings.GetFeatureToggleFilePath();
var etagBackupFile = settings.GetFeatureToggleETagFilePath();
// Cancellation
CancellationToken = cancellationTokenSource.Token;
ContextProvider = settings.UnleashContextProvider;
var loader = new CachedFilesLoader(settings.JsonSerializer, fileSystem, backupFile, etagBackupFile);
var cachedFilesResult = loader.EnsureExistsAndLoad();
ToggleCollection = new ThreadSafeToggleCollection
{
Instance = cachedFilesResult.InitialToggleCollection ?? new ToggleCollection()
};
MetricsBucket = new ThreadSafeMetricsBucket();
IUnleashApiClient apiClient;
if (settings.UnleashApiClient == null)
{
var httpClient = settings.HttpClientFactory.Create(settings.UnleashApi);
apiClient = new UnleashApiClient(httpClient, settings.JsonSerializer, new UnleashApiClientRequestHeaders()
{
AppName = settings.AppName,
InstanceTag = settings.InstanceTag,
CustomHttpHeaders = settings.CustomHttpHeaders
});
if (settings.LoadTogglesImmediately)
{
var toggles = apiClient.FetchToggles("", CancellationToken.None);
ToggleCollection.Instance = toggles.Result.ToggleCollection;
}
}
else
{
// Mocked backend: fill instance collection
apiClient = settings.UnleashApiClient;
var toggles = apiClient.FetchToggles("", CancellationToken.None);
ToggleCollection.Instance = toggles.Result.ToggleCollection;
}
scheduledTaskManager = settings.ScheduledTaskManager;
IsMetricsDisabled = settings.SendMetricsInterval == null;
var fetchFeatureTogglesTask = new FetchFeatureTogglesTask(
apiClient,
ToggleCollection,
settings.JsonSerializer,
fileSystem,
backupFile,
etagBackupFile)
{
ExecuteDuringStartup = true,
Interval = settings.FetchTogglesInterval,
Etag = cachedFilesResult.InitialETag
};
var scheduledTasks = new List <IUnleashScheduledTask>()
{
fetchFeatureTogglesTask
};
if (settings.SendMetricsInterval != null)
{
var clientRegistrationBackgroundTask = new ClientRegistrationBackgroundTask(
apiClient,
settings,
strategyMap.Select(pair => pair.Key).ToList())
{
Interval = TimeSpan.Zero,
ExecuteDuringStartup = true
};
scheduledTasks.Add(clientRegistrationBackgroundTask);
var clientMetricsBackgroundTask = new ClientMetricsBackgroundTask(
apiClient,
settings,
MetricsBucket)
{
ExecuteDuringStartup = false,
Interval = settings.SendMetricsInterval.Value
};
scheduledTasks.Add(clientMetricsBackgroundTask);
}
scheduledTaskManager.Configure(scheduledTasks, CancellationToken);
}