Struct ScheduleLock 

pub struct ScheduleLock {
    pub task_name: String,
    pub owner: String,
    pub acquired_at: DateTime<Utc>,
    pub expires_at: DateTime<Utc>,
    pub renewal_count: u32,
}

Schedule lock for preventing duplicate execution in distributed scenarios

Fields

task_name: String

Task name this lock is for

owner: String

Lock owner identifier (e.g., scheduler instance ID)

acquired_at: DateTime<Utc>

When the lock was acquired

expires_at: DateTime<Utc>

When the lock expires (for automatic cleanup)

renewal_count: u32

Lock renewal count (for debugging)

Implementations

impl ScheduleLock

pub fn new(task_name: String, owner: String, ttl_seconds: u64) -> Self

Create a new schedule lock

Arguments

• task_name - Name of the task to lock
• owner - Identifier of the lock owner (e.g., scheduler instance ID)
• ttl_seconds - Time-to-live for the lock in seconds

pub fn is_expired(&self) -> bool

Check if the lock has expired

pub fn is_owned_by(&self, owner: &str) -> bool

Check if the lock is owned by the given owner

pub fn renew(&mut self, ttl_seconds: u64) -> Result<(), ScheduleError>

Renew the lock for another TTL period

Arguments

• ttl_seconds - Time-to-live for the renewed lock

Returns

• Ok(()) if renewed successfully
• Err(ScheduleError) if the lock has already expired

pub fn ttl(&self) -> Duration

Get remaining time until expiration

pub fn age(&self) -> Duration

Get age of the lock since acquisition

Trait Implementations

impl Clone for ScheduleLock

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ScheduleLock

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ScheduleLock

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ScheduleLock

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

where __S: Serializer,

Serialize this value into the given Serde serializer.