Add tracing for Cassandra

- Bump CassandraCSharpDriver to 3.22.0.
- Add support for tracing to Cassandra.

Author: martincostello

CHANGELOG.md

@@ -162,6 +162,11 @@
 * Use 1.12.0-beta.1 of OpenTelemetry.Resources.OperatingSystem ([#145](https://github.com/grafana/grafana-opentelemetry-dotnet/pull/145))
 * Use 1.12.0-beta.1 of OpenTelemetry.Resources.Process ([#145](https://github.com/grafana/grafana-opentelemetry-dotnet/pull/145))
 * Use 1.12.0-beta.1 of OpenTelemetry.Resources.ProcessRuntime ([#145](https://github.com/grafana/grafana-opentelemetry-dotnet/pull/145))
+* Use 3.22.0 of CassandraCSharpDriver
+  ([#202](https://github.com/grafana/grafana-opentelemetry-dotnet/pull/202))
+* Enable tracing for Cassandra instrumentation (requires the
+  `CassandraCSharpDriver.OpenTelemetry` NuGet package to be installed)
+  ([#202](https://github.com/grafana/grafana-opentelemetry-dotnet/pull/202))
 
 ### Bug Fixes
 

src/Grafana.OpenTelemetry.Base/Instrumentations/CassandraInitializer.cs

@@ -4,6 +4,7 @@
 //
 
 using OpenTelemetry.Metrics;
+using OpenTelemetry.Trace;
 
 namespace Grafana.OpenTelemetry
 {
@@ -19,5 +20,10 @@ protected override void InitializeMetrics(MeterProviderBuilder builder)
                 "AddCassandraInstrumentation",
                 new object[] { builder });
         }
+
+        protected override void InitializeTracing(TracerProviderBuilder builder)
+        {
+            builder.AddSource("CassandraCSharpDriver.OpenTelemetry");
+        }
     }
 }

src/Grafana.OpenTelemetry/Grafana.OpenTelemetry.csproj

@@ -20,11 +20,9 @@
   </ItemGroup>
 
   <!-- This dependency is pulled in by `OpenTelemetry.Instrumentation.Cassandra` with a minimum
-       version of 3.16.0. We change this to 3.17.0, as the previous versions have dependency
-       requirements that conflict with recent .NET package versions. -->
+       version of 3.16.0. We change this to 3.22.0 to add support for tracing. -->
   <ItemGroup>
-    <!-- TODO Bump to 3.22.0? -->
-    <PackageReference Include="CassandraCSharpDriver" Version="[3.17.0,)" />
+    <PackageReference Include="CassandraCSharpDriver" Version="[3.22.0,)" />
   </ItemGroup>
 
   <ItemGroup Label="Stable instrumentation packages with dependencies">