Struct trust_dns_resolver::dns_lru::DnsLru

source · [−]

pub struct DnsLru { /* private fields */ }

Expand description

And LRU eviction cache specifically for storing DNS records

Implementations

impl DnsLru

pub fn new(capacity: usize, ttl_cfg: TtlConfig) -> Self

Construct a new cache

Arguments

capacity - size in number of records, this can be the max size of 2048 (record size) * capacity
ttl_cfg - force minimums and maximums for cached records

pub fn insert_records(
    &self,
    original_query: Query,
    records: impl Iterator<Item = Record>,
    now: Instant
) -> Option<Lookup>

inserts a record based on the name and type.

Arguments

original_query - is used for matching the records that should be returned
records - the records will be partitioned by type and name for storage in the cache
now - current time for use in associating TTLs

Return

This should always return some records, but will be None if there are no records or the original_query matches none

pub fn get(
    &self,
    query: &Query,
    now: Instant
) -> Option<Result<Lookup, ResolveError>>

Based on the query, see if there are any records available

Trait Implementations

impl Clone for DnsLru

fn clone(&self) -> DnsLru

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

impl Debug for DnsLru

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl !RefUnwindSafe for DnsLru

impl Send for DnsLru

impl Sync for DnsLru

impl Unpin for DnsLru

impl !UnwindSafe for DnsLru

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more