Struct metrics::Label [−][src]
pub struct Label(_, _);
Expand description
Metadata for a metric key in the for of a key/value pair.
Metrics are always defined by a name, but can optionally be assigned “labels”, which are key/value pairs that provide metadata about the key. Labels are typically used for differentiating the context of when an where a metric are emitted.
For example, in a web service, you might wish to label metrics with the user ID responsible for the request currently being processed, or the request path being processed. Another example may be that if you were running a piece o code that was turned on or off by a feature toggle, you may wish to include a label in metrics to indicate whether or not they were using the feature toggle.
Implementations
Trait Implementations
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
Auto Trait Implementations
impl RefUnwindSafe for Label
impl UnwindSafe for Label
Blanket Implementations
Mutably borrows from an owned value. Read more