/// <summary>
/// Gets a JSON string for properties from the log message's state and any active scopes.
/// </summary>
/// <param name="state">The state from the log message.</param>
/// <param name="provider">The <see cref="LoupeLoggerProvider"/>.</param>
/// <typeparam name="T">The type of the state object</typeparam>
/// <returns>A JSON string.</returns>
public static string GetJson <T>(T state, LoupeLoggerProvider provider)
{
var propertySet = HashSetPool.Get();
ByteBufferWriter buffer = null;
Utf8JsonWriter jsonWriter = null;
try
{
// Write state first
WriteState(state, propertySet, ref buffer, ref jsonWriter);
// Write any values from active scopes
WriteScope(provider, propertySet, ref jsonWriter, ref buffer);
if (!(jsonWriter is null))
{
jsonWriter.WriteEndObject();
jsonWriter.Flush();
return(buffer.OutputAsString);
}
}
finally
{
HashSetPool.Return(propertySet);
if (!(jsonWriter is null))
{
jsonWriter.Dispose();
buffer.Dispose();
}
}
return(null);
}
/// <summary>
/// Initializes a new instance of the <see cref="LoupeLoggerScope"/> class.
/// </summary>
/// <param name="provider">The <see cref="LoupeLoggerProvider"/>.</param>
/// <param name="state">The state.</param>
public LoupeLoggerScope(LoupeLoggerProvider provider, object state)
{
_provider = provider;
_state = state;
// Replace the current scope
_parent = provider.CurrentScope;
provider.CurrentScope = this;
}
private static void WriteScope(LoupeLoggerProvider provider, HashSet <string> propertySet, ref Utf8JsonWriter jsonWriter, ref ByteBufferWriter buffer)
{
if (provider.CurrentScope is null)
{
return;
}
if (jsonWriter is null)
{
buffer = new ByteBufferWriter();
jsonWriter = new Utf8JsonWriter(buffer);
jsonWriter.WriteStartObject();
}
provider.CurrentScope.Enrich(jsonWriter, propertySet);
}
/// <summary>
/// Initializes a new instance of the <see cref="LoupeLogger"/> class.
/// </summary>
public LoupeLogger(LoupeLoggerProvider provider, string category)
{
_provider = provider;
_category = category;
}
