Struct DaemonId 

pub struct DaemonId { /* private fields */ }

Identity of a running daemon: an optional operator-supplied machine id paired with a per-process time-ordered UUIDv7.

The machine id (typically a hostname) makes the Display form human-readable and lets the coordinator route by machine, while the UUID keeps the id unique even when two daemons share a machine id (or none is set). The Display form is "{machine_id}-{uuid}", or a bare "{uuid}" when there is no machine id; from_display_str is its inverse.

Implementations

impl DaemonId

pub fn new(machine_id: Option<String>) -> Self

Create a fresh daemon id for the given machine, assigning a new time-ordered UUIDv7. Pass None when no machine id is configured.

pub fn matches_machine_id(&self, machine_id: &str) -> bool

Whether this daemon was created with exactly the given machine id.

Always false for a daemon created without a machine id.

pub fn machine_id(&self) -> Option<&str>

The machine id this daemon was created with, or None if none was set.

pub fn from_display_str(s: &str) -> Option<Self>

Reverse of Display: parse "{machine_id}-{uuid}", or a bare "{uuid}" when there is no machine id.

Both the machine id (hostnames) and the canonical UUID contain -, so splitting on a hyphen drops or corrupts a hyphenated machine id. Split off the fixed-width 36-char canonical UUID suffix instead (dora-rs/dora#2027).

Expects exact Display output (no surrounding whitespace). The machine-id path requires the canonical 36-char UUID suffix that Display emits; the bare path accepts any form Uuid::parse_str recognizes (canonical / simple / urn / braced).

use dora_message::common::DaemonId;

// A hyphenated machine id round-trips through `Display` (dora-rs/dora#2027)...
let id = DaemonId::new(Some("my-host".to_string()));
assert_eq!(DaemonId::from_display_str(&id.to_string()), Some(id.clone()));
assert_eq!(id.machine_id(), Some("my-host"));
assert!(id.matches_machine_id("my-host"));

// ...as does a daemon with no machine id (a bare UUID).
let anon = DaemonId::new(None);
assert_eq!(DaemonId::from_display_str(&anon.to_string()), Some(anon.clone()));
assert_eq!(anon.machine_id(), None);

// Garbage does not parse to a bogus id.
assert_eq!(DaemonId::from_display_str("not-a-daemon-id"), None);

Trait Implementations

impl Clone for DaemonId

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 DaemonId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DaemonId

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DaemonId

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

Formats the value using the given formatter.

impl Eq for DaemonId

impl Ord for DaemonId

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for DaemonId

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for DaemonId

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for DaemonId

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 DaemonId