95 lines
3.1 KiB
C#
95 lines
3.1 KiB
C#
// <copyright file="PrometheusExporter.cs" company="OpenTelemetry Authors">
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// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// </copyright>
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using System;
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using OpenTelemetry.Exporter.Prometheus;
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using OpenTelemetry.Metrics;
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namespace OpenTelemetry.Exporter
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{
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/// <summary>
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/// Exporter of OpenTelemetry metrics to Prometheus.
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/// </summary>
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[ExportModes(ExportModes.Pull)]
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public class PrometheusExporter : BaseExporter<Metric>, IPullMetricExporter
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{
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internal const string HttpListenerStartFailureExceptionMessage = "PrometheusExporter http listener could not be started.";
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internal readonly PrometheusExporterOptions Options;
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private readonly PrometheusExporterHttpServer metricsHttpServer;
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private Func<int, bool> funcCollect;
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private Func<Batch<Metric>, ExportResult> funcExport;
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private bool disposed;
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/// <summary>
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/// Initializes a new instance of the <see cref="PrometheusExporter"/> class.
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/// </summary>
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/// <param name="options">Options for the exporter.</param>
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public PrometheusExporter(PrometheusExporterOptions options)
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{
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this.Options = options;
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if (options.StartHttpListener)
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{
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try
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{
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this.metricsHttpServer = new PrometheusExporterHttpServer(this);
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this.metricsHttpServer.Start();
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}
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catch (Exception ex)
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{
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throw new InvalidOperationException(HttpListenerStartFailureExceptionMessage, ex);
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}
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}
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this.CollectionManager = new PrometheusCollectionManager(this);
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}
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public Func<int, bool> Collect
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{
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get => this.funcCollect;
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set => this.funcCollect = value;
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}
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internal Func<Batch<Metric>, ExportResult> OnExport
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{
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get => this.funcExport;
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set => this.funcExport = value;
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}
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internal PrometheusCollectionManager CollectionManager { get; }
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public override ExportResult Export(in Batch<Metric> metrics)
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{
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return this.OnExport(metrics);
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}
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protected override void Dispose(bool disposing)
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{
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if (!this.disposed)
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{
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if (disposing)
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{
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this.metricsHttpServer?.Dispose();
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}
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this.disposed = true;
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}
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base.Dispose(disposing);
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}
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}
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}
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