/// <summary>
/// Appends the tags.
/// </summary>
/// <param name="writer">The writer.</param>
/// <param name="pointSettings">The point settings.</param>
private void AppendTags(StringBuilder writer, PointSettings pointSettings)
{
IReadOnlyDictionary <string, string> entries;
if (pointSettings == null)
{
entries = _tags;
}
else
{
IReadOnlyDictionary <string, string> defaultTags =
pointSettings.GetDefaultTags();
try
{
entries = _tags.AddRange(defaultTags);
}
catch (ArgumentException)
{
// Most cases don't expect to override existing content
// override don't consider as best practice
// therefore it a trade-off between being less efficient
// on the default behavior or on the override scenario
var builder = _tags.ToBuilder();
foreach (var item in defaultTags)
{
var name = item.Key;
if (!builder.ContainsKey(name)) // existing tags overrides
{
builder.Add(name, item.Value);
}
}
entries = builder;
}
}
foreach (var keyValue in entries)
{
var key = keyValue.Key;
var value = keyValue.Value;
if (string.IsNullOrEmpty(key) || string.IsNullOrEmpty(value))
{
continue;
}
writer.Append(',');
EscapeKey(writer, key);
writer.Append('=');
EscapeKey(writer, value);
}
writer.Append(' ');
}
/// <summary>
/// The Line Protocol
/// </summary>
/// <param name="pointSettings">with the default values</param>
/// <returns></returns>
public string ToLineProtocol(PointSettings pointSettings = null)
{
var sb = new StringBuilder();
EscapeKey(sb, _measurementName, false);
AppendTags(sb, pointSettings);
var appendedFields = AppendFields(sb);
if (!appendedFields)
{
return("");
}
AppendTime(sb);
return(sb.ToString());
}
private void AppendTags(StringBuilder writer, PointSettings pointSettings)
{
IDictionary <string, string> entries = _tags;
if (pointSettings != null)
{
var defaultTags = pointSettings.GetDefaultTags();
if (defaultTags.Count > 0)
{
var list = new List <IDictionary <string, string> > {
_tags, defaultTags
};
entries = list.SelectMany(dict => dict)
.Where(pair => !string.IsNullOrEmpty(pair.Value))
.ToLookup(pair => pair.Key, pair => pair.Value)
.ToDictionary(group => group.Key, group =>
{
var first = group.First();
return(string.IsNullOrEmpty(first) ? group.Last() : first);
})
.ToSortedDictionary(StringComparer.Ordinal);
}
}
foreach (var keyValue in entries)
{
var key = keyValue.Key;
var value = keyValue.Value;
if (string.IsNullOrEmpty(key) || string.IsNullOrEmpty(value))
{
continue;
}
writer.Append(',');
EscapeKey(writer, key);
writer.Append('=');
EscapeKey(writer, value);
}
writer.Append(' ');
}