Struct RequestContext 

pub struct RequestContext { /* private fields */ }

An ordered set of string key/value pairs propagated with a grain call.

Implementations

impl RequestContext

pub fn new() -> Self

Create an empty context.

pub fn with(self, key: impl Into<String>, value: impl Into<String>) -> Self

Builder-style insert.

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

Insert or replace an entry.

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

Look up an entry.

pub fn is_empty(&self) -> bool

Whether the context carries no entries.

pub fn len(&self) -> usize

Number of entries.

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

Iterate over the entries in key order.

pub fn merged_with(&self, other: &RequestContext) -> RequestContext

Return a new context with other’s entries overlaid on top of this one’s. Used to apply per-call overrides over client defaults.

Trait Implementations

impl Clone for RequestContext

fn clone(&self) -> RequestContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RequestContext

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

Formats the value using the given formatter.

impl Default for RequestContext

fn default() -> RequestContext

Returns the “default value” for a type.

impl<K, V> FromIterator<(K, V)> for RequestContext

where K: Into<String>, V: Into<String>,

fn from_iter<T: IntoIterator<Item = (K, V)>>(iter: T) -> Self

Creates a value from an iterator.

impl PartialEq for RequestContext

fn eq(&self, other: &RequestContext) -> 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 Eq for RequestContext

impl StructuralPartialEq for RequestContext