Enum Command 

pub enum Command {
    Noop,
    Insert {
        key: Bytes,
        value: Bytes,
        ttl_secs: Option<u64>,
    },
    Delete {
        key: Bytes,
    },
    CompareAndSwap {
        key: Bytes,
        expected: Option<Bytes>,
        value: Bytes,
    },
}

Decoded KV operation — the unit of work delivered to a StateMachine.

Replaces raw proto Entry at the StateMachine::apply_chunk boundary. The framework decodes wire bytes exactly once (in DefaultStateMachineHandler) before dispatching; implementors never touch prost or proto types.

Variants

Noop

Raft-internal no-op written by a newly elected leader. SM must return ApplyResult::success(entry.index) and otherwise ignore it. Cannot be filtered before reaching SM: omitting it would create gaps in last_applied, breaking the index-tracking invariant in StateMachineWorker.

Insert

Fields

key: Bytes

value: Bytes

ttl_secs: Option<u64>

None = no expiration. Proto encodes this as ttl_secs = 0; we convert to Option here so SM implementors use idiomatic Rust instead of magic zeros.

Delete

Fields

key: Bytes

CompareAndSwap

Fields

key: Bytes

expected: Option<Bytes>

None means the key must not exist for the swap to succeed.

value: Bytes

Trait Implementations

impl Clone for Command

fn clone(&self) -> Command

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Command

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

Formats the value using the given formatter.

impl PartialEq for Command

fn eq(&self, other: &Command) -> 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 TryFrom<WriteCommand> for Command

Single coupling point between the proto schema and the SM trait.

When a new operation variant is added to WriteCommand, the compiler forces an update here (non-exhaustive match), preventing silent omissions downstream.

type Error = Error

The type returned in the event of a conversion error.

fn try_from(wc: WriteCommand) -> Result<Command, Error>

Performs the conversion.

impl StructuralPartialEq for Command