public ImageFromCacheService(CacheUpdateService cacheUpdateService,
IMiniLogger logger = null,
int cacheLifeTimeMilliSec = 2001,
int framesPerSecond = 5
)
{
_cacheUpdateService = cacheUpdateService ?? throw new ArgumentNullException(nameof(cacheUpdateService));
if (cacheLifeTimeMilliSec < MinValueCacheLifeTimeMilliSec)
{
throw new ArgumentException(
$"{nameof(cacheLifeTimeMilliSec)} too small: " +
$"{cacheLifeTimeMilliSec} < {MinValueCacheLifeTimeMilliSec}");
}
if (framesPerSecond < MinValueFramesPerSecond)
{
throw new ArgumentException(
$"{nameof(framesPerSecond)} too small: " +
$"{framesPerSecond} < {MinValueFramesPerSecond}");
}
_cacheLifeTimeMilliSec = cacheLifeTimeMilliSec;
_framesPerSecond = framesPerSecond;
_logger = logger;
}
//Helpers
private CacheUpdateService CreateImageCache(byte[] imgBytes, int userId, DateTime dateUpdated)
{
var imageCache = new CacheUpdateService();
imageCache.UpdateImage(imgBytes, userId, dateUpdated);
return(imageCache);
}
public void GetImageAsByteArray_NoParamsAndImageCacheHasNoData_ReturnsNull()
{
// Arrange
var imageCache = new CacheUpdateService();
// Act
var imgCacheSvc = new ImageFromCacheService(imageCache);
// Assert
Assert.IsNull(imgCacheSvc.GetCurrentImageAsByteArray());
}
public void Constructor_ValidParams_HappyPath(int expiration, int fps)
{
// Arrange
var imageCache = new CacheUpdateService();
// Act
var imgCacheSvc = new ImageFromCacheService(imageCache, null, expiration, fps);
// Assert
Assert.IsNotNull(imgCacheSvc);
}
public void Constructor_InvalidParams_Throws(int expiration, int fps)
{
// Arrange
var imageCache = new CacheUpdateService();
Assert.Throws <ArgumentException>(() => new ImageFromCacheService(
cacheUpdateService: imageCache,
logger: null,
cacheLifeTimeMilliSec: expiration,
framesPerSecond: fps));
}
public void GetImageAsByteArray_NoParamsImageCacheHasData_ReturnsNotNull()
{
// Arrange
var imageCache = new CacheUpdateService();
imageCache.UpdateImage(new byte[2], 1, DateTime.MaxValue);
// Act
var imgCacheSvc = new ImageFromCacheService(imageCache);
// Assert
Assert.IsNotNull(imgCacheSvc.GetCurrentImageAsByteArray());
}
[TestCase(1, StrCacheLastUpdate, 2000, 5, true, 99, 5000, false)] // Failure: readerDelay > lifetime
public void GetNewImageAsByteArray_WithParamsAndFreshData_ReturnNotNull(int cacheUpdaterUserId, string strCacheLastUpdate, int cacheLifeTime,
int cacheFps, bool cacheHasData,
int cacheReaderUserId, int cacheReaderDelay, bool expectedSuccess)
{
// Arrange
DateTime cacheLastUpdate = DateTime.ParseExact(s: strCacheLastUpdate, format: "yyyy-MM-dd HH:mm:ss.fff", provider: null);
DateTime timeWhenCacheIsRead = cacheLastUpdate.AddMilliseconds(cacheReaderDelay);
byte[] imageBytes = cacheHasData ? new byte[2] : null;
CacheUpdateService imageCache = CreateImageCache(imageBytes, cacheUpdaterUserId, cacheLastUpdate);
var cachingService = new ImageFromCacheService(cacheUpdateService: imageCache, logger: null, cacheLifeTimeMilliSec: cacheLifeTime, framesPerSecond: cacheFps);
// Act
byte[] imgBytes = cachingService.GetNewImageAsByteArray(userId: cacheReaderUserId, timeRequested: timeWhenCacheIsRead);
bool resultIsNotNull = imgBytes != null;
// Assert
Assert.AreEqual(resultIsNotNull, expectedSuccess);
}
[TestCase(10, StrCacheLastUpdate, 2000, 5, true, 99, -1, 0)] // No wait time: cacheReaderDelay < 0 ms
public void WaitBeforeGettingNextImageTest_AnyParameters_ReturnExpectedResult(int cacheUpdaterUserId, string strCacheLastUpdate, int cacheLifeTime,
int cacheFps, bool cacheHasData,
int cacheReaderUserId, int cacheReaderDelay, int expectedWaitTimeMilliSec)
{
// Arrange
DateTime cacheLastUpdate = DateTime.ParseExact(s: strCacheLastUpdate, format: "yyyy-MM-dd HH:mm:ss.fff", provider: null);
DateTime timeWhenCacheIsRead = cacheLastUpdate.AddMilliseconds(cacheReaderDelay);
byte[] imageBytes = cacheHasData ? new byte[2] : null;
CacheUpdateService imageCache = CreateImageCache(imageBytes, cacheUpdaterUserId, cacheLastUpdate);
var cachingService = new ImageFromCacheService(cacheUpdateService: imageCache, logger: null, cacheLifeTimeMilliSec: cacheLifeTime, framesPerSecond: cacheFps);
int fpsTimeBetweenTwoFramesMilliSec = 1000 / cacheFps;
// Act
(int waitTimeMilliSec, string reason) = cachingService.WaitBeforeGettingNextImage(userId: cacheReaderUserId, timeRequested: timeWhenCacheIsRead);
// Assert
Assert.That(waitTimeMilliSec, Is.EqualTo(expectedWaitTimeMilliSec));
Assert.That(waitTimeMilliSec, Is.LessThanOrEqualTo(fpsTimeBetweenTwoFramesMilliSec));
}
[TestCase(10, StrCacheLastUpdate, 2000, 5, true, 99, -1, false)] // Cannot update = new date is in the past
public void UpdateCachedImage_AnyParameters_ReturnExpectedResult(int oldUpdaterUserId, string strCacheLastUpdate, int cacheLifeTime,
int cacheFps, bool cacheHasData,
int newCacheUpdaterUserId, int newCacheUpdaterDelay, bool expectedSuccess)
{
// Arrange
DateTime cacheLastUpdate = DateTime.ParseExact(s: strCacheLastUpdate, format: "yyyy-MM-dd HH:mm:ss.fff", provider: null);
DateTime timeWhenCacheIsRead = cacheLastUpdate.AddMilliseconds(newCacheUpdaterDelay);
var oldImageArraySize = 2;
byte[] imageBytes = cacheHasData ? new byte[oldImageArraySize] : null;
CacheUpdateService imageCache = CreateImageCache(imageBytes, oldUpdaterUserId, cacheLastUpdate);
var cachingService = new ImageFromCacheService(cacheUpdateService: imageCache, logger: null, cacheLifeTimeMilliSec: cacheLifeTime, framesPerSecond: cacheFps);
var newImageArraySize = 44;
// Act
cachingService.UpdateCachedImage(new byte[newImageArraySize], newCacheUpdaterUserId, timeWhenCacheIsRead);
// Assert
bool cacheHasBeenUpdated = cachingService.GetCurrentImageAsByteArray().Length == newImageArraySize;
Assert.That(cacheHasBeenUpdated, Is.EqualTo(expectedSuccess));
}
/// <summary>
/// Registers the type mappings with the Unity container (IoC container).
/// </summary>
/// <param name="container">The unity container to configure.</param>
/// <remarks>
/// There is no need to register concrete types such as controllers or
/// API controllers (unless you want to change the defaults), as Unity
/// allows resolving a concrete type even if it was not previously
/// registered.
/// </remarks>
public static void RegisterTypes(IUnityContainer container)
{
// NOTE: To load from web.config uncomment the line below.
// Make sure to add a Unity.Configuration to the using statements.
// container.LoadConfiguration();
// TODO: Register your type's mappings here.
// container.RegisterType<IProductRepository, ProductRepository>();
// Register interfaces
AppConfiguration configuration = AppConfiguration.Instance;
container.RegisterInstance(
configuration,
new ContainerControlledLifetimeManager() //Singleton
);
container.RegisterType <IDateTimeProvider, DateTimeProvider>(
new ContainerControlledLifetimeManager() //Singleton
);
container.RegisterType <IMiniLogger, MiniLogger>(
new InjectionConstructor(
container.Resolve <IDateTimeProvider>(),
container.Resolve <AppConfiguration>().UserIPsLogPath,
container.Resolve <AppConfiguration>().UserPtzCmdLogPath,
container.Resolve <AppConfiguration>().ErrorsLogPath,
container.Resolve <AppConfiguration>().CacheStatsLogPath
));
var imageCache = new CacheUpdateService();
container.RegisterInstance(imageCache);
container.RegisterType <IImageFromCacheService, ImageFromCacheService>(
new InjectionConstructor(
container.Resolve <CacheUpdateService>(),
container.Resolve <IMiniLogger>(),
container.Resolve <AppConfiguration>().CacheLifeTimeMilliSec,
container.Resolve <AppConfiguration>().CameraFps
));
container.RegisterType <IImageFromWebCamService, ImageFromWebCamService>(
new InjectionConstructor(
container.Resolve <AppConfiguration>().CameraConnectionInfo
));
var cacheUpdater = new CacheUpdaterInfo();
container.RegisterInstance(
cacheUpdater,
new ContainerControlledLifetimeManager() //Singleton
);
container.RegisterType <IImageProviderService, ImageProviderService>(
new InjectionConstructor(
container.Resolve <IImageFromCacheService>(),
container.Resolve <IImageFromWebCamService>(),
container.Resolve <IDateTimeProvider>(),
container.Resolve <IMiniLogger>(),
container.Resolve <AppConfiguration>().CacheUpdaterExpirationMilliSec,
container.Resolve <CacheUpdaterInfo>(),
container.Resolve <AppConfiguration>().ErrorImageLogPath
));
//// Register controllers - not needed
//container.RegisterType<BaseApiController>();
//container.RegisterType<ImageController>();
//container.RegisterType<PtzController>();
GlobalConfiguration.Configuration.DependencyResolver = new UnityDependencyResolver(container);
}
