private static ColoredConsoleTracerDecoration.LogSerializer GetLogSerializer(LogDataSerialization mode)
{
switch (mode)
{
case LogDataSerialization.Simple:
// Translation of the following, for performance, could import something like FastLinq and my array pool utilities for string.Join, but let's avoid the dependencies
////return fields => string.Join(", ", fields.Select(field => $"{field.key} = {field.value}"));
return(fields =>
{
// From simple benchmarks, this is about 50% faster and less memory than string.Join approach
const int partsPerField = 4;
int stringPartsElementCount = fields.Length * partsPerField - 1; // No separator for the last entry
var arrayOfStringParts = arrayPool.Rent(stringPartsElementCount);
try
{
for (int i = 0; i < fields.Length; i++)
{
var field = fields[i];
// Breaking apart the transformation $"{field.key} = {field.value}"
var indexInArrayOfStringParts = i * partsPerField;
arrayOfStringParts[indexInArrayOfStringParts] = field.key;
arrayOfStringParts[indexInArrayOfStringParts + 1] = " = ";
arrayOfStringParts[indexInArrayOfStringParts + 2] = field.value?.ToString();
// If more items, add separator
if (i < fields.Length - 1)
{
arrayOfStringParts[indexInArrayOfStringParts + 3] = ", ";
}
}
// Faster than string.Concat for some concerning reason
return string.Join(string.Empty, arrayOfStringParts, 0, stringPartsElementCount);
}
finally
{
arrayPool.Return(arrayOfStringParts);
}
});
case LogDataSerialization.Json:
return(input => JsonConvert.SerializeObject(input, serializerSettings));
case LogDataSerialization.SimplifySingleKvpAndEventsOtherwiseJson:
return(fields =>
{
if (fields.Length == 1)
{
string toReturn;
// Special OpenTracing convention for a single line log
if (fields[0].key == "event")
{
// Omit the key
toReturn = string.Empty;
}
else
{
toReturn = fields[0].key + " = ";
}
if (fields[0].value is string valueAsString)
{
toReturn += valueAsString;
}
else
{
toReturn += JsonConvert.SerializeObject(fields[0].value, serializerSettings);
}
return toReturn;
}
return JsonConvert.SerializeObject(fields, serializerSettings);
});
default:
throw new ArgumentOutOfRangeException();
}
}
public BasicDataSerializationConfiguration(SetTagDataSerialization tag, LogDataSerialization log)
{
this.SetTag = tag;
this.Log = log;
}
