Struct dashmap::ReadOnlyView

pub struct ReadOnlyView<K, V, S = RandomState> { /* private fields */ }

A read-only view into a DashMap. Allows to obtain raw references to the stored values.

Implementations

impl<K, V, S> ReadOnlyView<K, V, S>

pub fn into_inner(self) -> DashMap<K, V, S>

Consumes this ReadOnlyView, returning the underlying DashMap.

impl<'a, K: 'a + Eq + Hash, V: 'a, S: BuildHasher + Clone> ReadOnlyView<K, V, S>

pub fn len(&self) -> usize

Returns the number of elements in the map.

pub fn is_empty(&self) -> bool

Returns true if the map contains no elements.

pub fn capacity(&self) -> usize

Returns the number of elements the map can hold without reallocating.

pub fn contains_key<Q>(&'a self, key: &Q) -> boolwhere K: Borrow<Q>, Q: Hash + Eq + ?Sized,

Returns true if the map contains a value for the specified key.

pub fn get<Q>(&'a self, key: &Q) -> Option<&'a V>where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

Returns a reference to the value corresponding to the key.

pub fn get_key_value<Q>(&'a self, key: &Q) -> Option<(&'a K, &'a V)>where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

Returns the key-value pair corresponding to the supplied key.

pub fn iter(&'a self) -> impl Iterator<Item = (&'a K, &'a V)> + 'a

An iterator visiting all key-value pairs in arbitrary order. The iterator element type is (&'a K, &'a V).

pub fn keys(&'a self) -> impl Iterator<Item = &'a K> + 'a

An iterator visiting all keys in arbitrary order. The iterator element type is &'a K.

pub fn values(&'a self) -> impl Iterator<Item = &'a V> + 'a

An iterator visiting all values in arbitrary order. The iterator element type is &'a V.

pub fn shards(&self) -> &[RwLock<HashMap<K, SharedValue<V>, S>>]

Allows you to peek at the inner shards that store your data. You should probably not use this unless you know what you are doing.

Requires the raw-api feature to be enabled.

Examples

use dashmap::DashMap;

let map = DashMap::<(), ()>::new().into_read_only();
println!("Amount of shards: {}", map.shards().len());

Trait Implementations

impl<K: Eq + Hash + Clone, V: Clone, S: Clone> Clone for ReadOnlyView<K, V, S>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<K: Eq + Hash + Debug, V: Debug, S: BuildHasher + Clone> Debug for ReadOnlyView<K, V, S>

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

Formats the value using the given formatter.

impl<'a, K, V, S> IntoParallelIterator for &'a ReadOnlyView<K, V, S>where K: Send + Sync + Eq + Hash, V: Send + Sync, S: Send + Sync + Clone + BuildHasher,

type Iter = Iter<'a, K, V, S>

The parallel iterator type that will be created.

type Item = RefMulti<'a, K, V, S>

The type of item that the parallel iterator will produce.

fn into_par_iter(self) -> Self::Iter

Converts self into a parallel iterator.

impl<K, V, S> IntoParallelIterator for ReadOnlyView<K, V, S>where K: Send + Eq + Hash, V: Send, S: Send + Clone + BuildHasher,

type Iter = OwningIter<K, V, S>

The parallel iterator type that will be created.

type Item = (K, V)

The type of item that the parallel iterator will produce.

fn into_par_iter(self) -> Self::Iter

Converts self into a parallel iterator.