private void GenerateEntry(
LokiLogEvent lokiLogEvent,
ITextFormatter formatter,
LokiStream stream)
{
var buffer = new StringWriter(new StringBuilder(DefaultWriteBufferCapacity));
var logEvent = lokiLogEvent.LogEvent;
var timestamp = logEvent.Timestamp;
if (_useInternalTimestamp)
{
logEvent.AddPropertyIfAbsent(
new LogEventProperty("Timestamp", new ScalarValue(timestamp)));
timestamp = lokiLogEvent.InternalTimestamp;
}
formatter.Format(logEvent, buffer);
stream.AddEntry(timestamp, buffer.ToString().TrimEnd('\r', '\n'));
}
private (Dictionary <string, string> Labels, LokiLogEvent LokiLogEvent) GenerateLabels(LokiLogEvent lokiLogEvent)
{
var labels = _globalLabels.ToDictionary(label => label.Key, label => label.Value);
var properties = lokiLogEvent.Properties;
var(propertiesAsLabels, remainingProperties) =
properties.Partition(kvp => _propertiesAsLabels.Contains(kvp.Key));
foreach (var property in propertiesAsLabels)
{
var key = property.Key;
// If a message template is a composite format string that contains indexed placeholders ({0}, {1} etc),
// Serilog turns these placeholders into event properties keyed by numeric strings.
// Loki doesn't accept such strings as label keys. Prefix these numeric strings with "param"
// to turn them into valid label keys and at the same time denote them as ordinal parameters.
if (char.IsDigit(key[0]))
{
key = $"param{key}";
}
// Some enrichers generates extra quotes and it breaks the payload
var value = property.Value.ToString().Replace("\"", string.Empty);
if (labels.ContainsKey(key))
{
SelfLog.WriteLine(
"Labels already contains key {0}, added from global labels. Property value ({1}) with the same key is ignored",
key,
value);
continue;
}
labels.Add(key, value);
}
return(labels,
lokiLogEvent.CopyWithProperties(remainingProperties));
}
