/// <summary>
/// Use this extension method to ensure Outgoing Service Requests get logged
/// with the correct Dependency Information.
/// </summary>
public static Task <HttpResponseMessage> SendAsync(
this HttpClient httpClient,
HttpRequestMessage requestMessage,
string operationName,
string dependencyOperationName,
string dependencyOperationVersion)
{
string correlationVector = CorrelationVector.Current?.Increment();
if (!string.IsNullOrWhiteSpace(correlationVector))
{
requestMessage.Headers.Add(CorrelationVector.HeaderName, correlationVector);
var dependencyOperationInfo = new DependencyOperationInfo()
{
OperationName = operationName,
DependencyOperationName = dependencyOperationName,
DependencyOperationVersion = dependencyOperationVersion
};
// Add the dependency information to the cache so it can be used for logging
//
DependencyInfoCache.Add(correlationVector, dependencyOperationInfo);
// Add the dependency information to the request message properties so the
// client handler can add the dependency name and type
//
requestMessage.Properties.Add(
DependencyClientHandler.RequestPropertyKey,
dependencyOperationInfo);
}
return(httpClient.SendAsync(requestMessage));
}
private void LogHttpOutComplete(HttpWebRequest requestMessage, HttpStatusCode responseStatus, string responseSize)
{
long latency = (long)(DateTime.Now - requestMessage.Date).TotalMilliseconds;
string correlationVector = requestMessage.Headers["MS-CV"];
DependencyOperationInfo dependencyOperationInfo = null;
if (!string.IsNullOrWhiteSpace(correlationVector) &&
HttpClientExtensions.DependencyInfoCache.ContainsKey(correlationVector))
{
dependencyOperationInfo = HttpClientExtensions.DependencyInfoCache[correlationVector];
}
// These properties can be gleaned from the Http request and response
//
Console.WriteLine("---------------------------------------");
Console.WriteLine("Logging the Outgoing Service Request...");
Console.WriteLine("Correlation Vector: {0}", requestMessage.Headers["MS-CV"]);
Console.WriteLine("Target Uri: {0}", requestMessage.RequestUri.ToString());
Console.WriteLine("Latency ms: {0}", latency);
// TODO - need code to be able to read the service error code - should this code be common or customizable?
Console.WriteLine("Service error code: {0}", null);
Console.WriteLine("Succeeded: {0}", (int)responseStatus < 400);
Console.WriteLine("Request method: {0}", requestMessage.Method);
Console.WriteLine("Protocol Status Code: {0}", (int)responseStatus);
Console.WriteLine("Response Size (bytes): {0}", responseSize);
// These properties need to be stamped on the request by the service owner
// through the use of DependencyClientHandler and a HttpClient.SendAsync
// extension method.
//
if (dependencyOperationInfo != null)
{
Console.WriteLine("Dependency Name: {0}", dependencyOperationInfo.DependencyName);
Console.WriteLine("Dependency Type: {0}", dependencyOperationInfo.DependencyType);
Console.WriteLine("Operation Name: {0}", dependencyOperationInfo.OperationName);
Console.WriteLine("Dependency Operation Name: {0}", dependencyOperationInfo.DependencyOperationName);
Console.WriteLine("Dependency Operation Version: {0}", dependencyOperationInfo.DependencyOperationVersion);
}
Console.WriteLine("---------------------------------------");
if (dependencyOperationInfo != null)
{
HttpClientExtensions.DependencyInfoCache.Remove(correlationVector);
}
}
