Struct Topic 

pub struct Topic<T> { /* private fields */ }

Append-only queue. Producers send(), consumers drain() (single consumer) — mirrors V1 Topic channel.

Use Broadcast when more than one consumer needs to see every event.

Implementations

impl<T> Topic<T>

pub fn new() -> Self

New empty topic.

pub fn send(&mut self, value: T)

Append value to the queue.

pub fn extend<I: IntoIterator<Item = T>>(&mut self, values: I)

Append every item from values.

pub fn drain(&mut self) -> Vec<T>

Drain the queue, returning everything currently buffered.

pub fn peek(&self) -> &[T]

Borrow the current queue contents without consuming them.

pub fn len(&self) -> usize

Number of pending items.

pub fn is_empty(&self) -> bool

True if no items are pending.

Trait Implementations

impl<T: Send + Sync> Channel for Topic<T>

fn kind(&self) -> &'static str

Channel kind label, e.g. "AnyValue", "Topic".

impl<T: Clone> Clone for Topic<T>

fn clone(&self) -> Topic<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Topic<T>

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

Formats the value using the given formatter.

impl<T: Default> Default for Topic<T>

fn default() -> Topic<T>

Returns the “default value” for a type.

impl<'de, T> Deserialize<'de> for Topic<T>

where T: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T: PartialEq> PartialEq for Topic<T>

fn eq(&self, other: &Topic<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T> Serialize for Topic<T>

where T: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: Eq> Eq for Topic<T>

impl<T> StructuralPartialEq for Topic<T>