Struct JsonLayout 

pub struct JsonLayout { /* private fields */ }

A JSON layout for formatting log records.

Output format:

{"timestamp":"2024-08-11T22:44:57.172051+08:00","level":"ERROR","module_path":"file","file":"examples/file.rs","line":51,"message":"Hello error!"}
{"timestamp":"2024-08-11T22:44:57.172187+08:00","level":"WARN","module_path":"file","file":"examples/file.rs","line":52,"message":"Hello warn!"}
{"timestamp":"2024-08-11T22:44:57.172246+08:00","level":"INFO","module_path":"file","file":"examples/file.rs","line":53,"message":"Hello info!"}
{"timestamp":"2024-08-11T22:44:57.172300+08:00","level":"DEBUG","module_path":"file","file":"examples/file.rs","line":54,"message":"Hello debug!"}
{"timestamp":"2024-08-11T22:44:57.172353+08:00","level":"TRACE","module_path":"file","file":"examples/file.rs","line":55,"message":"Hello trace!"}

Examples

use logforth_layout_json::JsonLayout;

let json_layout = JsonLayout::default();

Implementations

impl JsonLayout

pub fn timezone(self, tz: TimeZone) -> Self

Set the timezone for timestamps.

Defaults to the system timezone.

Examples

use jiff::tz::TimeZone;
use logforth_layout_json::JsonLayout;

let layout = JsonLayout::default().timezone(TimeZone::UTC);

pub fn timestamp_format( self, format: fn(Timestamp, &TimeZone) -> String, ) -> Self

Set a user-defined timestamp format function.

Default to formatting the timestamp with offset as ISO 8601. See the example below.

For other formatting options, refer to the jiff::fmt::strtime documentation.

Examples

use jiff::Timestamp;
use jiff::tz::TimeZone;
use logforth_layout_json::JsonLayout;

// This is equivalent to the default timestamp format.
let layout = JsonLayout::default()
    .timestamp_format(|ts, tz| format!("{:.6}", ts.display_with_offset(tz.to_offset(ts))));

Trait Implementations

impl Clone for JsonLayout

fn clone(&self) -> JsonLayout

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for JsonLayout

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for JsonLayout

fn default() -> Self

Returns the “default value” for a type.

impl Layout for JsonLayout

fn format( &self, record: &Record<'_>, diags: &[Box<dyn Diagnostic>], ) -> Result<Vec<u8>, Error>

Format a log record with optional diagnostics.