Struct Uuid 

pub struct Uuid { /* private fields */ }

This class defines an immutable universally unique identifier (UUID). It represents a 128-bit value.

The toString() method prints using base64 URL encoding without padding (matching Java’s implementation). Likewise, the from_string method expects a base64 URL encoded string.

Implementations

impl Uuid

pub const ZERO_UUID: Uuid

A UUID that represents a null or empty UUID. Will never be returned by random_uuid.

pub const ONE_UUID: Uuid

A reserved UUID. Will never be returned by random_uuid.

pub const METADATA_TOPIC_ID: Uuid = Self::ONE_UUID

A UUID for the metadata topic in KRaft mode. Will never be returned by random_uuid.

pub const fn new(most_sig_bits: u64, least_sig_bits: u64) -> Self

Constructs a 128-bit UUID where the first u64 represents the most significant 64 bits and the second u64 represents the least significant 64 bits.

pub const fn zero() -> Self

Creates a zero UUID (all bits are zero).

pub fn random_uuid() -> Self

Static factory to retrieve a type 4 (pseudo randomly generated) UUID.

This will not generate a UUID equal to ZERO_UUID, ONE_UUID, or one whose string representation starts with a dash (“-”).

pub const fn most_sig_bits(&self) -> u64

Returns the most significant 64 bits of this UUID.

pub const fn least_sig_bits(&self) -> u64

Returns the least significant 64 bits of this UUID.

pub const fn is_zero(&self) -> bool

Checks if this is the zero UUID (all bits are zero).

pub fn with_bytes(bytes: [u8; 16]) -> Self

Creates a UUID from a 16-byte array in big-endian order.

pub fn to_bytes(self) -> [u8; 16]

Converts this UUID to a 16-byte array in big-endian order.

pub fn from_string(s: &str) -> Result<Self, String>

Creates a UUID based on a base64 URL encoded string (without padding). This matches the Java implementation’s fromString() method.

pub fn to_base64_string(self) -> String

Returns a base64 URL encoded string (without padding) of the UUID. This matches the Java implementation’s toString() method.

Trait Implementations

impl Clone for Uuid

fn clone(&self) -> Uuid

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Uuid

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

Formats the value using the given formatter.

impl Default for Uuid

fn default() -> Self

Returns the “default value” for a type.

impl Display for Uuid

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

Formats the value using the given formatter.

impl Hash for Uuid

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 Uuid

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

Compares two UUIDs using signed 64-bit comparison to match Java’s Uuid.compareTo() which compares long (signed) fields.

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 Uuid

fn eq(&self, other: &Uuid) -> 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 Uuid

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 Copy for Uuid

impl Eq for Uuid

impl StructuralPartialEq for Uuid