Struct Config

pub struct Config { /* private fields */ }

Configuration of a cache.

Implementations

impl Config

pub fn new() -> Self

Creates a new config with default values.

The default values are documented at the relevant set_* methods.

pub fn set_max_cache_entries(&mut self, value: u64)

Set the maximum number of cache entries.

The value has to be at least one, at most 1,000,000,000 and the default is 1000.

The values are just best guesses at the moment. The upper limit is set to be somewhat safe without being too limiting. The default is meant to be reasonable for a small system.

pub fn set_max_validity(&mut self, value: Duration)

Set the maximum validity of cache entries.

The value has to be at least 60 seconds, at most 6,048,000 seconds (10 weeks) and the default is 604800 seconds (one week).

pub fn set_transport_failure_duration(&mut self, value: Duration)

Set the time to cache transport failures.

The value has to be at least one second, at most 300 seconds (five minutes) and the default is 30 seconds.

pub fn set_misc_error_duration(&mut self, value: Duration)

Set the maximum time to cache results other than NOERROR or NXDOMAIN.

The value has to be at least one second, at most 300 seconds (five minutes) and the default is 30 seconds.

pub fn set_max_nxdomain_validity(&mut self, value: Duration)

Set the maximum time to cache NXDOMAIN results.

The value has to be at least 60 seconds (one minute), at most 86,400 seconds (one day) and the default is 3,600 seconds (one hour).

pub fn set_max_nodata_validity(&mut self, value: Duration)

Set the maximum time to cache NODATA results.

The value has to be at least 60 seconds (one minute), at most 86,400 seconds (one day) and the default is 3,600 seconds (one hour).

pub fn set_max_delegation_validity(&mut self, value: Duration)

Set the maximum time to cache delegations.

The value has to be at least 60 seconds (one minute), at most 1,000,000,000 seconds and the default is 1,000,000 seconds.

pub fn set_cache_truncated(&mut self, value: bool)

Enable or disable caching of response messages with the TC (truncated) flag set.

The default value is false (disabled).

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Config

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Config

fn default() -> Self

Returns the “default value” for a type.