Struct tracing_core::subscriber::Interest [−][src]
pub struct Interest(_);
Expand description
Indicates a Subscriber
’s interest in a particular callsite.
Subscriber
s return an Interest
from their register_callsite
methods
in order to determine whether that span should be enabled or disabled.
Implementations
Returns an Interest
indicating that the subscriber is never interested
in being notified about a callsite.
If all active subscribers are never()
interested in a callsite, it will
be completely disabled unless a new subscriber becomes active.
Returns an Interest
indicating the subscriber is sometimes interested
in being notified about a callsite.
If all active subscribers are sometimes
or never
interested in a
callsite, the currently active subscriber will be asked to filter that
callsite every time it creates a span. This will be the case until a new
subscriber expresses that it is always
interested in the callsite.
Returns an Interest
indicating the subscriber is always interested in
being notified about a callsite.
If any subscriber expresses that it is always()
interested in a given
callsite, then the callsite will always be enabled.
Returns true
if the subscriber is never interested in being notified
about this callsite.
Returns true
if the subscriber is sometimes interested in being notified
about this callsite.