Struct Baggage 

pub struct Baggage { /* private fields */ }

Baggage is key-value pairs that propagate across the network

Implementations

impl Baggage

pub fn new() -> Self

Create a new empty baggage container

pub fn set(&mut self, key: impl Into<String>, value: impl Into<String>)

Insert or replace a baggage entry by key

pub fn set_with_metadata( &mut self, key: impl Into<String>, value: impl Into<String>, metadata: impl Into<String>, )

Insert or replace a baggage entry with associated metadata properties

pub fn get(&self, key: &str) -> Option<&str>

Look up a baggage value by key

pub fn get_with_metadata(&self, key: &str) -> Option<(&str, Option<&str>)>

Look up a baggage value and its optional metadata by key

pub fn remove(&mut self, key: &str) -> Option<String>

Remove a baggage entry by key and return its value

pub fn iter(&self) -> impl Iterator<Item = (&str, &str)>

Iterate over all baggage entries as (key, value) pairs

pub fn len(&self) -> usize

Return the number of baggage entries

pub fn is_empty(&self) -> bool

Return true if there are no baggage entries

pub fn merge(&mut self, other: &Baggage)

Merge another baggage into this one (other takes precedence)

Trait Implementations

impl Clone for Baggage

fn clone(&self) -> Baggage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Baggage

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

Formats the value using the given formatter.

impl Default for Baggage

fn default() -> Baggage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Baggage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Baggage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.