Struct PersistentState 

pub struct PersistentState {
    pub current_term: Term,
    pub voted_for: Option<NodeId>,
    pub log: RaftLog,
}

Persistent state on all servers

Updated on stable storage before responding to RPCs

Fields

current_term: Term

Latest term server has seen (initialized to 0, increases monotonically)

voted_for: Option<NodeId>

Candidate ID that received vote in current term (or None)

log: RaftLog

Log entries (each entry contains command and term)

Implementations

impl PersistentState

pub fn new() -> Self

Create new persistent state with initial values

pub fn increment_term(&mut self)

Increment the current term

pub fn update_term(&mut self, term: Term) -> bool

Update term if the given term is higher

pub fn vote_for(&mut self, candidate_id: NodeId)

Vote for a candidate in the current term

pub fn can_vote_for(&self, candidate_id: &NodeId) -> bool

Check if vote can be granted for the given candidate

pub fn to_bytes(&self) -> Result<Vec<u8>, EncodeError>

Serialize state to bytes for persistence

pub fn from_bytes(bytes: &[u8]) -> Result<Self, DecodeError>

Deserialize state from bytes

Trait Implementations

impl Clone for PersistentState

fn clone(&self) -> PersistentState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PersistentState

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

Formats the value using the given formatter.

impl Default for PersistentState

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PersistentState

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for PersistentState

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

where __S: Serializer,

Serialize this value into the given Serde serializer.