Enum Cmd 

pub enum Cmd {
    Set {
        key: Vec<u8>,
        value: Vec<u8>,
    },
    Delete {
        key: Vec<u8>,
    },
    Cas {
        key: Vec<u8>,
        expect: Option<Vec<u8>>,
        value: Vec<u8>,
    },
    AcquireLock {
        key: String,
        holder: String,
        now_ms: u64,
        ttl_ms: u64,
    },
    RenewLock {
        key: String,
        holder: String,
        now_ms: u64,
        ttl_ms: u64,
    },
    ReleaseLock {
        key: String,
        holder: String,
    },
}

A replicated state machine command.

Variants

Set

Write a key/value pair.

Fields

key: Vec<u8>

value: Vec<u8>

Delete

Delete a key.

Fields

key: Vec<u8>

Cas

Compare-and-swap: write value only if the current value equals expect. Returns whether the swap succeeded.

Fields

key: Vec<u8>

expect: Option<Vec<u8>>

value: Vec<u8>

AcquireLock

Acquire a lock: granted if it is free, expired, or already held by the same holder; returns a monotonically increasing fencing token.

Fields

key: String

holder: String

now_ms: u64

ttl_ms: u64

RenewLock

Lease renewal: extend the deadline if the caller still holds the lock and it has not expired.

Fields

key: String

holder: String

now_ms: u64

ttl_ms: u64

ReleaseLock

Release a lock (only the holder may release it).

Fields

key: String

holder: String

Trait Implementations

impl Clone for Cmd

fn clone(&self) -> Cmd

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cmd

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Cmd

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Cmd

impl PartialEq for Cmd

fn eq(&self, other: &Cmd) -> bool

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Cmd

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Cmd