public List <Span> Apply()
{
return((new int[this.traces]).SelectMany(i =>
{
var start = DateTime.Now.AddHours(-(rnd.Next(8) + 1));
var trace = new GenTrace();
//DoRpc(trace, start, rnd.Next(this.maxDepth), GetRandRpcName(), withEndpoint(ep => ep));
withEndpoint(ep => {
DoRpc(trace, start, rnd.Next(this.maxDepth), GetRandRpcName(), ep);
return ep;
});
return trace.Spans;
}).ToList());
}
private DateTime DoRpc(
GenTrace trace,
DateTime time,
int depth,
string spanName,
Endpoint endpoint,
long spanId = long.MinValue,
long?parentSpanId = null)
{
if (spanId == long.MinValue)
{
spanId = GetRandLong();
}
var curTime = time.AddMilliseconds(1);
var svrAnnos = new List <Annotation>();
svrAnnos.Add(new Annotation(Util.ToUnixTimMicroseconds(curTime), Constants.ServerRecv, endpoint));
var svrBinAnnos = new List <BinaryAnnotation>();
var randInt = rnd.Next(3);
for (var i = 0; i < randInt; i++)
{
svrBinAnnos.Add(new BinaryAnnotation(GetRandSvcName(), Encoding.UTF8.GetBytes(GetRandSvcName()), AnnotationType.STRING, endpoint));
}
// simulate some amount of work
curTime = curTime.AddMilliseconds(rnd.Next(10));
randInt = rnd.Next(5) + 1;
for (var i = 0; i < randInt; i++)
{
svrAnnos.Add(new Annotation(Util.ToUnixTimMicroseconds(curTime), GetRandSvcName(), endpoint));
curTime = curTime.AddMilliseconds(rnd.Next(10));
}
if (depth > 0)
{
// parallel calls to downstream services
var times = (new int[rnd.Next(depth) + 1]).Select(i =>
{
return(withEndpoint(nextEp =>
{
var thisSpanId = GetRandLong();
var thisParentId = spanId;
var rpcName = GetRandRpcName();
var annos = new List <Annotation>();
var binAnnos = new List <BinaryAnnotation>();
var delay = rnd.Next(10) > 6 ? rnd.Next(10) : 0;
annos.Add(new Annotation(Util.ToUnixTimMicroseconds(curTime) + delay, Constants.ClientSend, nextEp));
var thisTime = DoRpc(trace, curTime, rnd.Next(depth), rpcName, nextEp, thisSpanId, thisParentId).AddMilliseconds(1);
annos.Add(new Annotation(Util.ToUnixTimMicroseconds(thisTime), Constants.ClientRecv, nextEp));
var thisTimestamp = annos[0].timestamp;
var thisDuration = annos[1].timestamp - annos[0].timestamp;
trace.AddSpan(rpcName, thisSpanId, thisParentId, thisTimestamp, thisDuration, annos, binAnnos);
return thisTime;
}));
});
curTime = times.Max();
}
svrAnnos.Add(new Annotation(Util.ToUnixTimMicroseconds(curTime), Constants.ServerSend, endpoint));
var timestamp = svrAnnos[0].timestamp;
var duration = svrAnnos[svrAnnos.Count - 1].timestamp - svrAnnos[0].timestamp;
trace.AddSpan(spanName, spanId, parentSpanId, timestamp, duration, svrAnnos, svrBinAnnos);
return(curTime);
}