/// <summary>
/// Creates a new <see cref="RequestThrottlingMiddleware"/>.
/// </summary>
/// <param name="next">The <see cref="RequestDelegate"/> representing the next middleware in the pipeline.</param>
/// <param name="loggerFactory">The <see cref="ILoggerFactory"/> used for logging.</param>
/// <param name="options">The <see cref="RequestThrottlingOptions"/> containing the initialization parameters.</param>
public RequestThrottlingMiddleware(RequestDelegate next, ILoggerFactory loggerFactory, IOptions <RequestThrottlingOptions> options)
{
_requestThrottlingOptions = options.Value;
if (_requestThrottlingOptions.MaxConcurrentRequests == null)
{
throw new ArgumentException("The value of 'options.MaxConcurrentRequests' must be specified.", nameof(options));
}
if (_requestThrottlingOptions.MaxConcurrentRequests < 0)
{
throw new ArgumentException("The value of 'options.MaxConcurrentRequests' must be a positive integer.", nameof(options));
}
if (_requestThrottlingOptions.RequestQueueLimit < 0)
{
throw new ArgumentException("The value of 'options.RequestQueueLimit' must be a positive integer.", nameof(options));
}
if (_requestThrottlingOptions.OnRejected == null)
{
throw new ArgumentException("The value of 'options.OnRejected' must not be null.", nameof(options));
}
_next = next;
_logger = loggerFactory.CreateLogger <RequestThrottlingMiddleware>();
_requestQueue = new RequestQueue(
_requestThrottlingOptions.MaxConcurrentRequests.Value,
_requestThrottlingOptions.RequestQueueLimit);
}
/// <summary>
/// Creates a new <see cref="RequestThrottlingMiddleware"/>.
/// </summary>
/// <param name="next">The <see cref="RequestDelegate"/> representing the next middleware in the pipeline.</param>
/// <param name="loggerFactory">The <see cref="ILoggerFactory"/> used for logging.</param>
/// <param name="options">The <see cref="RequestThrottlingOptions"/> containing the initialization parameters.</param>
public RequestThrottlingMiddleware(RequestDelegate next, ILoggerFactory loggerFactory, IOptions <RequestThrottlingOptions> options)
{
_requestThrottlingOptions = options.Value;
if (_requestThrottlingOptions.MaxConcurrentRequests == null)
{
throw new ArgumentException("The value of 'options.MaxConcurrentRequests' must be specified.", nameof(options));
}
if (_requestThrottlingOptions.MaxConcurrentRequests <= 0)
{
throw new ArgumentOutOfRangeException(nameof(options), "The value of `options.MaxConcurrentRequests` must be a positive integer.");
}
if (_requestThrottlingOptions.RequestQueueLimit < 0)
{
throw new ArgumentException("The value of 'options.RequestQueueLimit' must be a positive integer.", nameof(options));
}
if (_requestThrottlingOptions.OnRejected == null)
{
throw new ArgumentException("The value of 'options.OnRejected' must not be null.", nameof(options));
}
_next = next;
_logger = loggerFactory.CreateLogger <RequestThrottlingMiddleware>();
if (_requestThrottlingOptions.ServerAlwaysBlocks)
{
// note: this option for testing only. Blocks all requests from entering the server.
_requestQueue = new TailDrop(0, _requestThrottlingOptions.RequestQueueLimit);
}
else
{
_requestQueue = new TailDrop(_requestThrottlingOptions.MaxConcurrentRequests.Value, _requestThrottlingOptions.RequestQueueLimit);
}
}
/// <summary>
/// Creates a new <see cref="RequestThrottlingMiddleware"/>.
/// </summary>
/// <param name="next">The <see cref="RequestDelegate"/> representing the next middleware in the pipeline.</param>
/// <param name="loggerFactory">The <see cref="ILoggerFactory"/> used for logging.</param>
/// <param name="options">The <see cref="RequestThrottlingOptions"/> containing the initialization parameters.</param>
public RequestThrottlingMiddleware(RequestDelegate next, ILoggerFactory loggerFactory, IOptions <RequestThrottlingOptions> options)
{
if (options.Value.MaxConcurrentRequests == null)
{
throw new ArgumentException("The value of 'options.MaxConcurrentRequests' must be specified.", nameof(options));
}
_next = next;
_logger = loggerFactory.CreateLogger <RequestThrottlingMiddleware>();
_options = options.Value;
_requestQueue = new RequestQueue(_options.MaxConcurrentRequests.Value);
}