| | | 1 | | // Copyright (c) ZeroC, Inc. |
| | | 2 | | |
| | | 3 | | using IceRpc.Extensions.DependencyInjection; |
| | | 4 | | using IceRpc.Metrics.Internal; |
| | | 5 | | using System.Diagnostics.Metrics; |
| | | 6 | | |
| | | 7 | | namespace IceRpc.Metrics; |
| | | 8 | | |
| | | 9 | | /// <summary>An interceptor that publishes invocation metrics using a singleton meter named "IceRpc.Invocation". |
| | | 10 | | /// </summary> |
| | | 11 | | /// <seealso cref="Meter"/> |
| | | 12 | | /// <seealso cref="MetricsPipelineExtensions"/> |
| | | 13 | | /// <seealso cref="MetricsInvokerBuilderExtensions"/> |
| | | 14 | | public class MetricsInterceptor : IInvoker |
| | | 15 | | { |
| | | 16 | | private readonly IInvoker _next; |
| | | 17 | | private readonly InvocationMetrics _invocationMetrics; |
| | | 18 | | |
| | | 19 | | /// <summary>Constructs a metrics interceptor.</summary> |
| | | 20 | | /// <param name="next">The next invoker in the invocation pipeline.</param> |
| | | 21 | | public MetricsInterceptor(IInvoker next) |
| | 0 | 22 | | : this(next, InvocationMetrics.Instance) |
| | 0 | 23 | | { |
| | 0 | 24 | | } |
| | | 25 | | |
| | | 26 | | /// <inheritdoc/> |
| | | 27 | | public async Task<IncomingResponse> InvokeAsync(OutgoingRequest request, CancellationToken cancellationToken) |
| | 5 | 28 | | { |
| | 5 | 29 | | _invocationMetrics.RequestStart(); |
| | | 30 | | try |
| | 5 | 31 | | { |
| | 5 | 32 | | IncomingResponse response = await _next.InvokeAsync(request, cancellationToken).ConfigureAwait(false); |
| | | 33 | | // A non-OK status code means the server returned a failure response. |
| | 2 | 34 | | if (response.StatusCode != StatusCode.Ok) |
| | 1 | 35 | | { |
| | 1 | 36 | | _invocationMetrics.RequestFailure(); |
| | 1 | 37 | | } |
| | 2 | 38 | | return response; |
| | | 39 | | } |
| | 2 | 40 | | catch (OperationCanceledException exception) when (exception.CancellationToken == cancellationToken) |
| | 1 | 41 | | { |
| | 1 | 42 | | _invocationMetrics.RequestCancel(); |
| | 1 | 43 | | throw; |
| | | 44 | | } |
| | 2 | 45 | | catch |
| | 2 | 46 | | { |
| | 2 | 47 | | _invocationMetrics.RequestFailure(); |
| | 2 | 48 | | throw; |
| | | 49 | | } |
| | | 50 | | finally |
| | 5 | 51 | | { |
| | 5 | 52 | | _invocationMetrics.RequestStop(); |
| | 5 | 53 | | } |
| | 2 | 54 | | } |
| | | 55 | | |
| | 5 | 56 | | internal MetricsInterceptor(IInvoker next, InvocationMetrics invocationMetrics) |
| | 5 | 57 | | { |
| | 5 | 58 | | _next = next; |
| | 5 | 59 | | _invocationMetrics = invocationMetrics; |
| | 5 | 60 | | } |
| | | 61 | | } |