/// <summary>
/// Converts Activity Links to custom property with key as _MS.links.
/// Value will be a JSON string formatted as [{"operation_Id":"{TraceId}","id":"{SpanId}"}].
/// </summary>
private static void AddActivityLinksToPartCTags(IEnumerable <ActivityLink> links, ref AzMonList PartCTags)
{
string msLinks = "_MS.links";
// max number of links that can fit in this json formatted string is 107. it is based on assumption that traceid and spanid will be of fixed length.
// Keeping max at 100 for now.
int maxLinks = MaxlinksAllowed;
if (links != null && links.Any())
{
var linksJson = new StringBuilder();
linksJson.Append('[');
foreach (var link in links)
{
linksJson
.Append('{')
.Append("\"operation_Id\":")
.Append('\"')
.Append(link.Context.TraceId.ToHexString())
.Append('\"')
.Append(',');
linksJson
.Append("\"id\":")
.Append('\"')
.Append(link.Context.SpanId.ToHexString())
.Append('\"');
linksJson.Append("},");
maxLinks--;
if (maxLinks == 0)
{
if (MaxlinksAllowed < links.Count())
{
AzureMonitorExporterEventSource.Log.Write($"ActivityLinksIgnored{EventLevelSuffix.Informational}", $"Max count of {MaxlinksAllowed} has reached.");
}
break;
}
}
if (linksJson.Length > 0)
{
// trim trailing comma - json does not support it
linksJson.Remove(linksJson.Length - 1, 1);
}
linksJson.Append(']');
AzMonList.Add(ref PartCTags, new KeyValuePair <string, object>(msLinks, linksJson.ToString()));
}
}
internal static RemoteDependencyData GetRemoteDependencyData(Activity activity, ref TagEnumerationState monitorTags)
{
AddActivityLinksToPartCTags(activity.Links, ref monitorTags.PartCTags);
string httpUrl = null;
string dependencyName;
if (monitorTags.activityType == PartBType.Http)
{
httpUrl = monitorTags.PartBTags.GetDependencyUrl();
dependencyName = monitorTags.PartBTags.GetHttpDependencyName(httpUrl) ?? activity.DisplayName;
}
else
{
dependencyName = activity.DisplayName;
}
var dependency = new RemoteDependencyData(2, dependencyName, activity.Duration.ToString("c", CultureInfo.InvariantCulture))
{
Id = activity.Context.SpanId.ToHexString(),
Success = activity.GetStatus().StatusCode != StatusCode.Error
};
switch (monitorTags.activityType)
{
case PartBType.Http:
dependency.Data = httpUrl;
dependency.Target = monitorTags.PartBTags.GetDependencyTarget(PartBType.Http);
dependency.Type = "Http";
dependency.ResultCode = AzMonList.GetTagValue(ref monitorTags.PartBTags, SemanticConventions.AttributeHttpStatusCode)?.ToString() ?? "0";
break;
case PartBType.Db:
var depDataAndType = AzMonList.GetTagValues(ref monitorTags.PartBTags, SemanticConventions.AttributeDbStatement, SemanticConventions.AttributeDbSystem);
dependency.Data = depDataAndType[0]?.ToString();
dependency.Target = monitorTags.PartBTags.GetDbDependencyTarget();
dependency.Type = SqlDbs.Contains(depDataAndType[1]?.ToString()) ? "SQL" : depDataAndType[1]?.ToString();
break;
case PartBType.Rpc:
var depInfo = AzMonList.GetTagValues(ref monitorTags.PartBTags, SemanticConventions.AttributeRpcService, SemanticConventions.AttributeRpcSystem, SemanticConventions.AttributeRpcStatus);
dependency.Data = depInfo[0]?.ToString();
dependency.Type = depInfo[1]?.ToString();
dependency.ResultCode = depInfo[2]?.ToString();
break;
case PartBType.Messaging:
depDataAndType = AzMonList.GetTagValues(ref monitorTags.PartBTags, SemanticConventions.AttributeMessagingUrl, SemanticConventions.AttributeMessagingSystem);
dependency.Data = depDataAndType[0]?.ToString();
dependency.Type = depDataAndType[1]?.ToString();
break;
}
if (activity.Kind == ActivityKind.Internal && activity.Parent != null)
{
dependency.Type = "InProc";
}
AddPropertiesToTelemetry(dependency.Properties, ref monitorTags.PartCTags);
return(dependency);
}
private static void AddPropertiesToTelemetry(IDictionary <string, string> destination, ref AzMonList PartCTags)
{
// TODO: Iterate only interested fields. Ref: https://github.com/Azure/azure-sdk-for-net/pull/14254#discussion_r470907560
for (int i = 0; i < PartCTags.Length; i++)
{
destination.Add(PartCTags[i].Key, PartCTags[i].Value?.ToString());
}
}