Struct LeaseFile 

pub struct LeaseFile {
    pub pid: u32,
    pub start_time: u64,
    pub last_heartbeat: u64,
}

Lease file stored at ~/.acp-cli/sessions/<key>.lease.

The queue owner writes this file on startup and updates the heartbeat periodically. Other processes read it to determine whether a live owner already exists for a given session key.

Fields

pid: u32

PID of the queue owner process.

start_time: u64

Unix timestamp (seconds) when the owner started.

last_heartbeat: u64

Unix timestamp (seconds) of the last heartbeat update.

Implementations

impl LeaseFile

pub fn write(session_key: &str) -> Result<()>

Write a new lease file for session_key with the current PID and timestamp.

pub fn read(session_key: &str) -> Option<LeaseFile>

Read the lease file for session_key. Returns None if the file is missing or cannot be parsed.

pub fn update_heartbeat(session_key: &str) -> Result<()>

Update the last_heartbeat timestamp in an existing lease file.

pub fn remove(session_key: &str)

Remove the lease file for session_key (best-effort).

pub fn is_valid(&self, ttl_secs: u64) -> bool

Check whether the lease is still valid:

• The heartbeat is within ttl_secs of the current time.
• The process identified by pid is still alive.

Trait Implementations

impl Debug for LeaseFile

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LeaseFile

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for LeaseFile

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

where __S: Serializer,

Serialize this value into the given Serde serializer.