120 lines
4.4 KiB
C#
120 lines
4.4 KiB
C#
// <copyright file="TestRedis.cs" company="OpenTelemetry Authors">
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// Copyright 2018, 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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namespace Samples
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{
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using System;
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using System.Collections.Generic;
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using System.Threading;
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using OpenTelemetry.Collector.StackExchangeRedis;
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using OpenTelemetry.Exporter.Zipkin;
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using OpenTelemetry.Trace;
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using OpenTelemetry.Trace.Sampler;
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using StackExchange.Redis;
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internal class TestRedis
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{
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internal static object Run(string zipkinUri)
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{
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// 1. Configure exporter to export traces to Zipkin
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var exporter = new ZipkinTraceExporter(
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new ZipkinTraceExporterOptions()
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{
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Endpoint = new Uri(zipkinUri),
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ServiceName = "tracing-to-zipkin-service",
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},
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Tracing.ExportComponent);
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exporter.Start();
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// 2. Configure 100% sample rate for the purposes of the demo
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var traceConfig = Tracing.TraceConfig;
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var currentConfig = traceConfig.ActiveTraceParams;
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var newConfig = currentConfig.ToBuilder()
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.SetSampler(Samplers.AlwaysSample)
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.Build();
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traceConfig.UpdateActiveTraceParams(newConfig);
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// 3. Tracer is global singleton. You can register it via dependency injection if it exists
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// but if not - you can use it as follows:
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var tracer = Tracing.Tracer;
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var collector = new StackExchangeRedisCallsCollector(tracer, null, Tracing.ExportComponent);
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// connect to the server
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var connection = ConnectionMultiplexer.Connect("localhost:6379");
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connection.RegisterProfiler(collector.GetProfilerSessionsFactory());
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// select a database (by default, DB = 0)
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var db = connection.GetDatabase();
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// 4. Create a scoped span. It will end automatically when using statement ends
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using (tracer.WithSpan(tracer.SpanBuilder("Main").StartSpan()))
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{
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Console.WriteLine("About to do a busy work");
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for (var i = 0; i < 10; i++)
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{
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DoWork(db);
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}
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}
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// 5. Gracefully shutdown the exporter so it'll flush queued traces to Zipkin.
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Tracing.ExportComponent.SpanExporter.Dispose();
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return null;
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}
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private static void DoWork(IDatabase db)
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{
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// 6. Get the global singleton Tracer object
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var tracer = Tracing.Tracer;
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// 7. Start another span. If another span was already started, it'll use that span as the parent span.
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// In this example, the main method already started a span, so that'll be the parent span, and this will be
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// a child span.
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using (tracer.WithSpan(tracer.SpanBuilder("DoWork").StartSpan()))
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{
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// Simulate some work.
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var span = tracer.CurrentSpan;
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try
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{
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db.StringSet("key", "value " + DateTime.Now.ToLongDateString());
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Console.WriteLine("Doing busy work");
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Thread.Sleep(1000);
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// run a command, in this case a GET
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var myVal = db.StringGet("key");
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Console.WriteLine(myVal);
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}
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catch (ArgumentOutOfRangeException e)
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{
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// 6. Set status upon error
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span.Status = Status.Internal.WithDescription(e.ToString());
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}
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// 7. Annotate our span to capture metadata about our operation
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var attributes = new Dictionary<string, object>
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{
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{ "use", "demo" },
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};
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span.AddEvent("Invoking DoWork", attributes);
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}
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}
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}
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}
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