Struct WorkerId 

pub struct WorkerId(/* private fields */);

Deterministic 64-bit worker identifier derived from InstanceId.

WorkerId enables embedding instance identity into fixed-size handles that can be passed with value semantics. A u128 is the largest integer that can be passed by value, making it ideal for handles that encode both routing and event information.

WorkerId is used in:

• EventHandle (velo): Uses 64 bits for WorkerId + 64 bits for event details
• EventRoutingTable (velo): Maps worker_id → instance_id for event routing
• Discovery systems: Lookup key for peer information

WorkerId is always derived from InstanceId using xxh3_64 hash. This ensures consistency across the system without needing to store both values.

Example

use velo_common::{InstanceId, WorkerId};

let instance_id = get_instance_id(); // From ActiveMessageClient
let worker_id = instance_id.worker_id();

// WorkerId is deterministic
assert_eq!(worker_id, instance_id.worker_id());

Implementations

impl WorkerId

pub fn from_u64(value: u64) -> Self

Create a WorkerId from a raw u64 value.

This is used when decoding WorkerIds from event handles or wire formats. External users should always derive WorkerId via instance_id.worker_id().

pub fn as_u64(&self) -> u64

Get the underlying u64 value.

Trait Implementations

impl Clone for WorkerId

fn clone(&self) -> WorkerId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WorkerId

impl Debug for WorkerId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WorkerId

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for WorkerId

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

Formats the value using the given formatter.

impl Eq for WorkerId

impl From<&InstanceId> for WorkerId

fn from(id: &InstanceId) -> Self

Derive WorkerId from InstanceId using xxh3_64 hash.

This is the canonical way to compute WorkerId - it should never be constructed any other way to ensure consistency.

impl From<InstanceId> for WorkerId

fn from(id: InstanceId) -> Self

Converts to this type from the input type.

impl From<WorkerId> for u64

fn from(id: WorkerId) -> Self

Converts to this type from the input type.

impl Hash for WorkerId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for WorkerId

fn cmp(&self, other: &WorkerId) -> 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.

impl PartialEq for WorkerId

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for WorkerId

fn partial_cmp(&self, other: &WorkerId) -> 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 WorkerId

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 WorkerId