public void SplitNameAndTags()
{
IDictionary<string, string> tags = new Dictionary<string, string>();
tags.Add("env","prod");
tags.Add("version","1.0.0");
DatadogCounter counter = new DatadogCounter(
"test[tag1:value1,tag2:value2,tag3:value3]", 1L, 1234L, tags);
IList<string> allTags = counter.Tags;
Assert.AreEqual(5, allTags.Count);
Assert.AreEqual("tag1:value1", allTags[0]);
Assert.AreEqual("tag2:value2", allTags[1]);
Assert.AreEqual("tag3:value3", allTags[2]);
Assert.AreEqual("env:prod", allTags[3]);
Assert.AreEqual("version:1.0.0", allTags[4]);
}
/**
* statsd has no notion of batch request, so counters are pushed as they are received
*/
public void AddCounter(DatadogCounter counter)
{
string[] tags = counter.Tags.ToArray();
StringBuilder sb = new StringBuilder("");
for (int i = tags.Length - 1; i >= 0; i--)
{
sb.Append(tags[i]);
if (i > 0)
{
sb.Append(",");
}
}
string metric = counter.Name;
string readonlyMetricsSeenName = metric + ":" + sb.ToString();
long rawValue = counter.Value;
long readonlyValue = rawValue;
if (_lastSeenCounters.ContainsKey(readonlyMetricsSeenName))
{
// If we've seen this counter before then calculate the difference
// by subtracting the new value from the old. StatsD expects a relative
// counter, not an absolute!
readonlyValue = Math.Max(0, rawValue - _lastSeenCounters[readonlyMetricsSeenName]);
}
// Store the last value we saw so that the next addCounter call can make
// the proper relative value
_lastSeenCounters.Add(readonlyMetricsSeenName, rawValue);
DogStatsd.Counter(metric, readonlyValue, _sampleRate, tags);
}