promgleam/metrics/counter

A counter is a cumulative metric that represents a single monotonically increasing counter whose value can only increase or be reset to zero on restart. For example, you can use a counter to represent the number of requests served, tasks completed, or errors.

Do not use a counter to expose a value that can decrease. For example, do not use a counter for the number of currently running processes; instead use a gauge.

pub fn create_counter(
  registry registry: String,
  name name: String,
  help help: String,
  labels labels: List(String),
) -> Result(Nil, String)

create_counter(
  registry: "default",
  name: "http_requests_total",
  help: "Total number of HTTP requests",
  labels: [ "method", "route", "status" ],
)

pub fn increment_counter(
  registry registry: String,
  name name: String,
  labels labels: List(String),
  value value: Int,
) -> Result(Nil, String)

increment_counter(
  registry: "default",
  name: "http_requests_total",
  labels: [ "GET", "/", "200" ],
  value: 1,
)