Struct Filter 

pub struct Filter { /* private fields */ }

Parses and evaluates METRICS_FILTER-style directives.

Filter string: comma-separated pattern=on|off. Bare on/off is a global default. A pattern matches if it is a prefix of the metric name OR is a component/prefix of the module path (e.g. traffic_controller matches iota_core::traffic_controller::metrics).

Implementations

impl Filter

pub fn is_enabled(&self, name: &str, module: &str) -> bool

Returns true if the metric should be registered (default when no directives match: true).

Matching order (last wins):

1. Empty pattern — global default.
2. name.starts_with(pattern) — metric name prefix.
3. module.starts_with(pattern) — module path prefix.
4. module contains "::{pattern}" — exact module component.

Trait Implementations

impl Default for Filter

fn default() -> Filter

Returns the “default value” for a type.