Class TraceHeaderPropagatingHandler

Traces outgoing HTTP requests and propagates the trace header.

Inheritance

System.Object

UnchainedTraceHeaderPropagatingHandler

TraceHeaderPropagatingHandler

Inherited Members

UnchainedTraceHeaderPropagatingHandler.SendAsync(HttpRequestMessage, CancellationToken)

Namespace: Google.Cloud.Diagnostics.Common

Assembly: Google.Cloud.Diagnostics.Common.dll

Syntax

public class TraceHeaderPropagatingHandler : UnchainedTraceHeaderPropagatingHandler

Remarks

Ensures the trace header is propagated in the headers for outgoing HTTP requests and traces the total time of the outgoing HTTP request. This is only done if tracing is initialized and tracing is enabled for the request current request.

Examples

public void DoSomething(IManagedTracer tracer)
{
    var traceHeaderHandler = new TraceHeaderPropagatingHandler(() => tracer);
    using (var httpClient = new HttpClient(traceHeaderHandler))
    {
        ...
    }
}

Constructors

TraceHeaderPropagatingHandler(Func<IManagedTracer>, HttpMessageHandler)

Constructs a new instance using the given delegate to obtain the "current" tracer on each request.

Declaration

public TraceHeaderPropagatingHandler(Func<IManagedTracer> managedTracerFactory, HttpMessageHandler innerHandler = null)

Parameters

Type	Name	Description
System.Func<IManagedTracer>	managedTracerFactory	A delegate used to obtain the "current" tracer for each request. The delegate should therefore be thread-safe.
HttpMessageHandler	innerHandler	The inner handler to delegate to. May be null, in which case a new will be used.