Struct StateJournal 

pub struct StateJournal {
    pub handoff_id: HandoffId,
    pub phase: Phase,
    pub incumbent_pid: u32,
    pub successor_pid: Option<u32>,
    pub started_at_unix_ms: u64,
}

Fields

handoff_id: HandoffId

phase: Phase

incumbent_pid: u32

successor_pid: Option<u32>

started_at_unix_ms: u64

Unix millis when the handoff was initiated.

Implementations

impl StateJournal

pub fn write_atomic(&self, path: &Path) -> Result<()>

Atomically write the journal. Creates the parent directory if missing.

Writes the payload to <path>.tmp, fsyncs it, renames, then fsyncs the parent directory. The file fsync makes the contents durable; the directory fsync makes the rename’s link-update durable. Without the directory fsync the rename can be lost on power failure even though the file contents survived — leaving a journaled phase that silently rolls back to the prior entry on supervisor restart. Pairs with the same pattern in lock.rs::write_pid_atomic.

pub fn read(path: &Path) -> Result<Option<Self>>

Read a previously-persisted journal. Ok(None) if no journal exists.

pub fn delete(path: &Path) -> Result<()>

Remove the journal. Idempotent.

Trait Implementations

impl Clone for StateJournal

fn clone(&self) -> StateJournal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StateJournal

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StateJournal

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for StateJournal

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

where __S: Serializer,

Serialize this value into the given Serde serializer.