private bool RenderAppendJsonPropertyValue(JsonAttribute attrib, LogEventInfo logEvent, bool renderEmptyValue, StringBuilder sb, bool beginJsonMessage)
{
BeginJsonProperty(sb, attrib.Name, beginJsonMessage);
if (attrib.Encode)
{
// "\"{0}\":{1}\"{2}\""
sb.Append('"');
}
int beforeValueLength = sb.Length;
attrib.LayoutWrapper.RenderAppendBuilder(logEvent, sb);
if (!renderEmptyValue && beforeValueLength == sb.Length)
{
return(false);
}
if (attrib.Encode)
{
sb.Append('"');
}
return(true);
}
private void AppendJsonAttributeValue(JsonAttribute attrib, string text, StringBuilder sb, bool first)
{
if (!first)
{
sb.EnsureCapacity(sb.Length + attrib.Name.Length + text.Length + 12);
sb.Append(',');
if (!this.SuppressSpaces)
{
sb.Append(' ');
}
}
sb.Append('"');
sb.Append(attrib.Name);
sb.Append('"');
sb.Append(':');
if (!this.SuppressSpaces)
{
sb.Append(' ');
}
if (attrib.Encode)
{
// "\"{0}\":{1}\"{2}\""
sb.Append('"');
sb.Append(text);
sb.Append('"');
}
else
{
//If encoding is disabled for current attribute, do not escape the value of the attribute.
//This enables user to write arbitrary string value (including JSON).
// "\"{0}\":{1}{2}";
sb.Append(text);
}
}
/// <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)
{
StringBuilder sb = null;
//Memory profiling pointed out that using a foreach-loop was allocating
//an Enumerator. Switching to a for-loop avoids the memory allocation.
for (int i = 0; i < this.Attributes.Count; i++)
{
var attrib = this.Attributes[i];
string text = attrib.LayoutWrapper.Render(logEvent);
if (!string.IsNullOrEmpty(text))
{
bool first = sb == null;
if (first)
{
sb = new StringBuilder(attrib.Name.Length + text.Length + 10);
sb.Append(SuppressSpaces ? "{" : "{ ");
}
AppendJsonAttributeValue(attrib, text, sb, first);
}
}
if (this.IncludeAllProperties && logEvent.HasProperties)
{
JsonAttribute dynAttrib = null;
foreach (var prop in logEvent.Properties)
{
//Determine property name
string propName = prop.Key.ToString();
//Skips properties in the ExcludeProperties list
if (this.ExcludeProperties.Contains(propName)) continue;
if (dynAttrib == null)
dynAttrib = new JsonAttribute();
if (prop.Value == null)
{
dynAttrib.Name = propName;
dynAttrib.Encode = false; // Don't put quotes around null values;
dynAttrib.Layout = "null";
}
else
{
System.Type objType = prop.Value.GetType();
System.TypeCode objTypeCode = System.Type.GetTypeCode(objType);
if (objTypeCode == System.TypeCode.Boolean || IsNumeric(objType, objTypeCode))
{
dynAttrib.Name = propName;
dynAttrib.Encode = false; //Don't put quotes around numbers or boolean values
dynAttrib.Layout = string.Concat("${event-properties:item=", propName, "}");
}
else
{
dynAttrib.Name = propName;
dynAttrib.Encode = true;
dynAttrib.Layout = string.Concat("${event-properties:item=", propName, "}");
}
}
string text = dynAttrib.LayoutWrapper.Render(logEvent);
if (!string.IsNullOrEmpty(text))
{
bool first = sb == null;
if (first)
{
sb = new StringBuilder(dynAttrib.Name.Length + text.Length + 10);
sb.Append(SuppressSpaces ? "{" : "{ ");
}
AppendJsonAttributeValue(dynAttrib, text, sb, first);
}
}
}
if (sb == null)
{
if (!RenderEmptyObject)
return string.Empty;
else
return SuppressSpaces ? "{}" : "{ }";
}
sb.Append(SuppressSpaces ? "}" : " }");
return sb.ToString();
}
private void AppendJsonAttributeValue(JsonAttribute attrib, string text, StringBuilder sb, bool first)
{
if (!first)
{
sb.EnsureCapacity(sb.Length + attrib.Name.Length + text.Length + 12);
sb.Append(',');
if (!this.SuppressSpaces)
sb.Append(' ');
}
sb.Append('"');
sb.Append(attrib.Name);
sb.Append('"');
sb.Append(':');
if (!this.SuppressSpaces)
sb.Append(' ');
if (attrib.Encode)
{
// "\"{0}\":{1}\"{2}\""
sb.Append('"');
sb.Append(text);
sb.Append('"');
}
else
{
//If encoding is disabled for current attribute, do not escape the value of the attribute.
//This enables user to write arbitrary string value (including JSON).
// "\"{0}\":{1}{2}";
sb.Append(text);
}
}
/// <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)
{
StringBuilder sb = null;
//Memory profiling pointed out that using a foreach-loop was allocating
//an Enumerator. Switching to a for-loop avoids the memory allocation.
for (int i = 0; i < this.Attributes.Count; i++)
{
var attrib = this.Attributes[i];
string text = attrib.LayoutWrapper.Render(logEvent);
if (!string.IsNullOrEmpty(text))
{
bool first = sb == null;
if (first)
{
sb = new StringBuilder(attrib.Name.Length + text.Length + 10);
sb.Append(SuppressSpaces ? "{" : "{ ");
}
AppendJsonAttributeValue(attrib, text, sb, first);
}
}
if (this.IncludeAllProperties && logEvent.HasProperties)
{
JsonAttribute dynAttrib = null;
foreach (var prop in logEvent.Properties)
{
//Determine property name
string propName = prop.Key.ToString();
//Skips properties in the ExcludeProperties list
if (this.ExcludeProperties.Contains(propName))
{
continue;
}
if (dynAttrib == null)
{
dynAttrib = new JsonAttribute();
}
if (prop.Value == null)
{
dynAttrib.Name = propName;
dynAttrib.Encode = false; // Don't put quotes around null values;
dynAttrib.Layout = "null";
}
else
{
System.Type objType = prop.Value.GetType();
System.TypeCode objTypeCode = System.Type.GetTypeCode(objType);
if (objTypeCode == System.TypeCode.Boolean || IsNumeric(objType, objTypeCode))
{
dynAttrib.Name = propName;
dynAttrib.Encode = false; //Don't put quotes around numbers or boolean values
dynAttrib.Layout = string.Concat("${event-properties:item=", propName, "}");
}
else
{
dynAttrib.Name = propName;
dynAttrib.Encode = true;
dynAttrib.Layout = string.Concat("${event-properties:item=", propName, "}");
}
}
string text = dynAttrib.LayoutWrapper.Render(logEvent);
if (!string.IsNullOrEmpty(text))
{
bool first = sb == null;
if (first)
{
sb = new StringBuilder(dynAttrib.Name.Length + text.Length + 10);
sb.Append(SuppressSpaces ? "{" : "{ ");
}
AppendJsonAttributeValue(dynAttrib, text, sb, first);
}
}
}
if (sb == null)
{
if (!RenderEmptyObject)
{
return(string.Empty);
}
else
{
return(SuppressSpaces ? "{}" : "{ }");
}
}
sb.Append(SuppressSpaces ? "}" : " }");
return(sb.ToString());
}
