Struct PrometheusText 

pub struct PrometheusText { /* private fields */ }

Encodes MetricEvents into Prometheus text exposition format (version 0.0.4).

Output format for a metric with labels:

metric_name{label1="val1",label2="val2"} value timestamp_ms\n

Output format for a metric with no labels:

metric_name value timestamp_ms\n

The timestamp is in milliseconds since the Unix epoch (integer).

Label values are escaped: \ → \\, " → \", newline → \n.

When precision is set, metric values are formatted to the specified number of decimal places (e.g., precision=2 formats 99.60573 as 99.61).

Implementations

impl PrometheusText

pub fn new(precision: Option<u8>) -> Self

Create a new PrometheusText encoder.

precision optionally limits the number of decimal places in metric values. None preserves full f64 precision (default behavior).

Trait Implementations

impl Default for PrometheusText

fn default() -> Self

Returns the “default value” for a type.

impl Encoder for PrometheusText

fn encode_metric( &self, event: &MetricEvent, buf: &mut Vec<u8>, ) -> Result<(), SondaError>

Encode a metric event into Prometheus text exposition format.

Writes the formatted line into buf. Bytes are appended; the buffer is not cleared before writing. Writes into the caller-provided buffer without additional heap allocations.

fn encode_log( &self, _event: &LogEvent, _buf: &mut Vec<u8>, ) -> Result<(), SondaError>

Encode a log event into the provided buffer.