public ZipkinClient(ILog logger, IZipkinConfig zipkinConfig, IOwinContext context, SpanCollector collector = null)
{
if (logger == null)
{
throw new ArgumentNullException(nameof(logger));
}
if (zipkinConfig == null)
{
throw new ArgumentNullException(nameof(zipkinConfig));
}
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var traceProvider = new TraceProvider(zipkinConfig, context);
IsTraceOn = !zipkinConfig.Bypass(context.Request) && IsTraceProviderSamplingOn(traceProvider);
if (!IsTraceOn)
{
return;
}
zipkinConfig.Validate();
ZipkinConfig = zipkinConfig;
this.logger = logger;
try
{
spanCollector = collector ?? SpanCollector.GetInstance(
zipkinConfig.ZipkinBaseUri,
zipkinConfig.SpanProcessorBatchSize,
logger);
spanTracer = new SpanTracer(
spanCollector,
new ServiceEndpoint(),
zipkinConfig.NotToBeDisplayedDomainList,
zipkinConfig.Domain);
TraceProvider = traceProvider;
}
catch (Exception ex)
{
logger.Error("Error Building Zipkin Client Provider", ex);
IsTraceOn = false;
}
}
public override async Task Invoke(IOwinContext context)
{
if (_config.Bypass != null && _config.Bypass(context.Request))
{
await Next.Invoke(context);
return;
}
var zipkin = new ZipkinClient(_config, context);
var span = zipkin.StartServerTrace(context.Request.Uri, context.Request.Method);
await Next.Invoke(context);
zipkin.EndServerTrace(span);
}