Struct QueryId 

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

Query-wide diagnostic correlation id.

Implementations

impl QueryId

pub const UNASSIGNED: &'static str = "unassigned"

Sentinel used by tests and manually-constructed metrics that have not been attached to a query entrypoint yet.

pub fn mint() -> Self

Mints a process-local query id.

pub fn new(value: impl Into<String>) -> Self

Wraps a caller-provided stable query id.

pub fn as_str(&self) -> &str

Returns the report-facing query id string.

pub fn is_assigned(&self) -> bool

Returns true when this id is not the default sentinel.

Trait Implementations

impl Clone for QueryId

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 QueryId

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

Formats the value using the given formatter.

impl Default for QueryId

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for QueryId

Decoding applies the same canonicalization as QueryId::new, so a blank serialized id reads back as QueryId::UNASSIGNED.

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for QueryId

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

Formats the value using the given formatter.

impl Eq for QueryId

impl From<&String> for QueryId

fn from(value: &String) -> Self

Converts to this type from the input type.

impl From<&str> for QueryId

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<String> for QueryId

fn from(value: String) -> Self

Converts to this type from the input type.

impl Hash for QueryId

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 QueryId

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 QueryId

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for QueryId

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 QueryId

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 QueryId