Struct MetricsJsonlWriter 

pub struct MetricsJsonlWriter { /* private fields */ }

Stateful JSONL writer that validates or writes the canonical header once, then appends compact sample rows without rescanning the whole file.

Implementations

impl MetricsJsonlWriter

pub fn open(path: &Path, header: &Value) -> Result<Self, Error>

Opens or creates a single-header JSONL file for repeated sample appends.

pub fn append_sample_row(&mut self, sample: &Value) -> Result<(), Error>

Appends one compact sample row without rescanning the existing file.

Trait Implementations

impl Debug for MetricsJsonlWriter

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

Formats the value using the given formatter.