/// <summary>
/// Renders all items from Tagolog MDC context and appends them to the specified <see cref="StringBuilder" />.
/// </summary>
/// <param name="builder">The <see cref="StringBuilder"/> to append the rendered data to.</param>
/// <param name="logEvent">Logging event.</param>
protected override void Append( StringBuilder builder, LogEventInfo logEvent )
{
var tagologContext = MdcStorage.GetContext();
if ( string.IsNullOrEmpty( tagologContext ) )
return;
IDictionary<string, string> tags;
IDictionary<string, string> builtInTags;
TagSerializer.TagsFromString( tagologContext, out tags, out builtInTags );
var tagsAsList = tags.ToList();
if ( BuiltInTags )
tagsAsList.AddRange( builtInTags.ToList() );
var orderByTags = ( OrderBy ) ?
tagsAsList.OrderBy( _ => _.Key ).ToList() :
tagsAsList.ToList();
if ( 0 != orderByTags.Count )
builder.Append( Prefix );
for ( var i = 0 ; i < orderByTags.Count ; i ++ )
{
var tagPair = orderByTags[ i ];
builder.Append( TagToString( tagPair.Key, tagPair.Value ) );
if ( i < orderByTags.Count - 1 )
{
if ( !string.IsNullOrEmpty( Separator ) )
builder.Append( Separator );
}
}
}
/// <summary>
/// Renders the specified MDC item and appends it to the specified <see cref="StringBuilder" />.
/// </summary>
/// <param name="builder">The <see cref="StringBuilder"/> to append the rendered data to.</param>
/// <param name="logEvent">Logging event.</param>
protected override void Append(StringBuilder builder, LogEventInfo logEvent)
{
var tagologContext = MdcStorage.GetContext();
if (string.IsNullOrEmpty(tagologContext))
{
return;
}
IDictionary <string, string> tags;
IDictionary <string, string> builtInTags;
TagSerializer.TagsFromString(tagologContext, out tags, out builtInTags);
string itemValue;
if (tags.ContainsKey(Item))
{
itemValue = tags[Item];
}
else if (builtInTags.ContainsKey(Item))
{
itemValue = builtInTags[Item];
}
else
{
return;
}
builder.Append(itemValue);
}
// Next release
/// <summary>
/// Gets or sets a value used as a name of Json container to append all Tagolog tags into.
/// If no container name specified, tags appednded to the root container.
/// </summary>
/// <example>
/// TagsContainerName = ""
/// { ... , TagologTag1=Value1, TagologTag2=Value1, ... }
///
/// TagsContainerName = "TagologSeparateContainer"
/// { ... TagologSeparateContainer={ TagologTag1=Value1, TagologTag2=Value1, ... } }
/// </example>
// [DefaultParameter]
// public string TagsContainerName { get; set; }
/// <summary>
/// Formats the log event as a JSON document for writing.
/// </summary>
/// <param name="logEvent">The log event to be formatted.</param>
/// <returns>A JSON string representation of the log event.</returns>
protected override string GetFormattedMessage(LogEventInfo logEvent)
{
var jsonLayoutResult = "{}";
if (0 != Attributes.Count)
{
// "{ attr1:value1, attr2:value2, ... attrN:valueN }"
jsonLayoutResult = base.GetFormattedMessage(logEvent);
}
var tags = MdcStorage.GetTags(builtInTagsEnabled: BuiltInTagsEnabled, orderByAsc: null);
if (null == tags)
{
return(jsonLayoutResult);
}
var stringBuilder = new StringBuilder(jsonLayoutResult);
using (var stringWriter = new StringWriter(stringBuilder))
{
using (var jsonWriter = new JsonTextWriter(stringWriter))
{
jsonWriter.Formatting = Formatting.None;
jsonWriter.WriteStartObject();
for (int i = 0; i < tags.Length; i++)
{
var tagKey = tags[i].Key;
if (!string.IsNullOrEmpty(TagsKeyPrefix))
{
tagKey = TagsKeyPrefix + tagKey;
}
jsonWriter.WritePropertyName(tagKey);
jsonWriter.WriteValue(tags[i].Value);
}
jsonWriter.WriteEndObject();
}
}
// At this point, string builder contains two Json fragments.
// "{ attr1:value1, attr2:value2, ... attrN:valueN }{ tag1:value1, tag2:value2, ... tagN:valueN }"
// Let's join them!
stringBuilder.Remove(jsonLayoutResult.Length - 1, 2);
if (0 != Attributes.Count)
{
stringBuilder.Insert(jsonLayoutResult.Length - 1, (SuppressSpaces) ? "," : ", ");
}
return(stringBuilder.ToString());
}
