/// <summary>
/// Serializes the metric to JSON.
/// </summary>
/// <param name="writer">The JSON Writer.</param>
/// <param name="recording">The metric recording.</param>
/// <remarks>
/// Implementation note, for performance and correctness:
/// 1. Don't emit null fields at all if the value isn't populated.
/// No need for that space in the content on the wire.
/// 2. Design this method to be repeatable for multiple metrics in case
/// we want to batch.
/// </remarks>
private static void MetricToJson(JsonTextWriter writer, ref PcfMetricRecording recording)
{
writer.WriteStartObject();
writer.WritePropertyName(MetricName);
writer.WriteValue(recording.Name);
writer.WritePropertyName(MetricType);
writer.WriteValue(recording.Type);
writer.WritePropertyName(MetricValue);
writer.WriteValue(recording.Value);
writer.WritePropertyName(Timestamp);
writer.WriteValue(recording.Timestamp);
if (!string.IsNullOrEmpty(recording.Unit))
{
writer.WritePropertyName(MetricUnit);
writer.WriteValue(recording.Unit);
}
writer.WritePropertyName(Tags);
writer.WriteStartObject();
if (recording.Tags != null)
{
foreach (var t in recording.Tags)
{
writer.WritePropertyName(t.Key);
writer.WriteValue(t.Value);
}
}
writer.WriteEndObject();
writer.WriteEndObject();
}
public void Serialize(Stream stream, PcfMetricRecording metric, PcfMetricForwarderSettings settings)
{
using (var writer = new JsonTextWriter(new StreamWriter(stream, Encoding.Default, 2048, true)))
{
WriteHeaders(writer, settings);
MetricToJson(writer, ref metric);
CloseHeaders(writer);
}
}
public void ShouldSerializeMetricIntoJson()
{
var serializer = new JsonMetricSerializer();
var recording = new PcfMetricRecording("hi", 0, "foos", Settings.TimeProvider.NowUnixEpoch, null);
var stream = new MemoryStream();
serializer.Serialize(stream, recording, Settings);
var actualOutput = stream.ToArray();
var jsonStr = Encoding.UTF8.GetString(actualOutput);
stream.Flush();
stream.Dispose();
}
