Struct Context 

pub struct Context {
    pub deadline: Option<Deadline>,
    pub principal: Option<Principal>,
    pub trace_id: Option<TraceId>,
    pub cache_policy: CachePolicy,
    pub cancellation: Cancellation,
}

Execution context propagated through every query resolution and command dispatch. Carries deadline, auth principal, trace id, cache policy, and cancellation signal.

Fields

deadline: Option<Deadline>

Absolute deadline for the resolution.

principal: Option<Principal>

Auth principal.

trace_id: Option<TraceId>

Trace id.

cache_policy: CachePolicy

Cache policy.

cancellation: Cancellation

Cancellation signal.

Implementations

impl Context

pub fn new() -> Self

Construct a context with default cache policy and no deadline.

pub fn with_deadline(self, d: Deadline) -> Self

Set the deadline.

pub fn with_principal(self, p: Principal) -> Self

Set the principal.

pub fn with_trace(self, t: TraceId) -> Self

Set the trace id.

pub fn with_cache_policy(self, p: CachePolicy) -> Self

Set the cache policy.

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Context

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

Formats the value using the given formatter.

impl Default for Context

fn default() -> Context

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Context

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Context

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Context

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 Context