Struct Builder 

pub struct Builder { /* private fields */ }

A builder for the JSON formatter. This is used to configure the JSON formatter. The default configuration is:

• level_name: “level”
• level_value_casing: Casing::Lowercase
• message_name: “message”
• target_name: “target”
• timestamp_name: “timestamp”
• timestamp_format: TimestampFormat::Rfc3339
• line_numbers: false
• file_names: false
• flatten_fields: true
• flatten_spans: true

Examples

use tracing_subscriber::prelude::*;

tracing_subscriber::registry()
    .with(
        tracing_ndjson::Builder::default()
            .with_level_name("severity")
            .with_level_value_casing(tracing_ndjson::Casing::Uppercase)
            .with_message_name("msg")
            .with_timestamp_name("ts")
            .with_timestamp_format(tracing_ndjson::TimestampFormat::Unix)
            .layer(),
    ).init();

tracing::info!(life = 42, "Hello, world!");

Implementations

impl Builder

pub fn new() -> Self

impl Builder

pub fn with_level_name(self, level_name: &'static str) -> Self

Set the field name for the level field. The default is “level”.

pub fn with_level_value_casing(self, casing: Casing) -> Self

Set the casing for the level field value. The default is Casing::Lowercase.

pub fn with_message_name(self, message_name: &'static str) -> Self

Set the field name for the message field. The default is “message”.

pub fn with_target_name(self, target_name: &'static str) -> Self

Set the field name for the target field. The default is “target”.

pub fn with_timestamp_name(self, timestamp_name: &'static str) -> Self

Set the field name for the timestamp field. The default is “timestamp”.

pub fn with_timestamp_format(self, timestamp_format: TimestampFormat) -> Self

Set the timestamp format for the timestamp field. The default is TimestampFormat::Rfc3339.

pub fn with_flatten_fields(self, flatten_fields: bool) -> Self

Set whether to flatten fields. The default is true. If false, fields will be nested under a “fields” object.

pub fn with_flatten_spans(self, flatten_spans: bool) -> Self

Set whether to flatten spans.

pub fn with_line_numbers(self, line_numbers: bool) -> Self

Set whether to include line numbers.

pub fn with_file_names(self, file_names: bool) -> Self

Set whether to include file names.

pub fn layer<S>(self) -> impl Layer<S>

where S: Subscriber + for<'a> LookupSpan<'a>,

Trait Implementations

impl Default for Builder

fn default() -> Self

Returns the “default value” for a type.