Struct LWWRegister 

pub struct LWWRegister<T: Clone + Serialize + DeserializeOwned> { /* private fields */ }

A last-write-wins register CRDT.

Writes with a higher logical timestamp overwrite earlier writes. On merge, the replica with the higher timestamp wins.

Implementations

impl<T: Clone + Serialize + DeserializeOwned> LWWRegister<T>

pub fn new() -> Self

Create a new, empty register.

pub fn write(&mut self, value: T, timestamp: u64, writer: impl Into<String>)

Write a value with a logical timestamp.

Arguments

• value — The value to write.
• timestamp — Logical timestamp; higher values win.
• writer — Identifier of the writing node.

pub fn read(&self) -> Option<&T>

Read the current value. Returns None if never written.

pub fn merge(&self, other: &LWWRegister<T>) -> LWWRegister<T>

Merge with another register. The one with the higher timestamp wins.

pub fn timestamp(&self) -> u64

Return the current logical timestamp.

Trait Implementations

impl<T: Clone + Clone + Serialize + DeserializeOwned> Clone for LWWRegister<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Clone + Serialize + DeserializeOwned> Debug for LWWRegister<T>

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

Formats the value using the given formatter.

impl<T: Clone + Serialize + DeserializeOwned> Default for LWWRegister<T>

fn default() -> Self

Returns the “default value” for a type.

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

where T: DeserializeOwned + Clone + Serialize,

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> Serialize for LWWRegister<T>

where T: Serialize + Clone + Serialize + DeserializeOwned,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.