Struct ContextData 

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

Immutable context data that can be safely shared across thread boundaries.

This struct holds key-value pairs of context information that gets attached to events when they are persisted. It uses an immutable HashMap internally for efficient cloning and thread-safe sharing of data snapshots.

ContextData is Send and can be passed between threads, unlike EventContext which is thread-local. This makes it suitable for transferring context across async boundaries via the WithEventContext trait.

Implementations

impl ContextData

pub fn lookup<T: DeserializeOwned>( &self, key: &'static str, ) -> Result<Option<T>, Error>

Trait Implementations

impl Clone for ContextData

fn clone(&self) -> ContextData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ContextData

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

Formats the value using the given formatter.

impl<'r> Decode<'r, Postgres> for ContextData

fn decode( value: PgValueRef<'r>, ) -> Result<Self, Box<dyn Error + Send + Sync + 'static>>

Decode a new value of this type using a raw value from the database.

impl<'de> Deserialize<'de> for ContextData

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'q> Encode<'q, Postgres> for ContextData

fn encode_by_ref( &self, buf: &mut PgArgumentBuffer, ) -> Result<IsNull, Box<dyn Error + Send + Sync + 'static>>

Writes the value of self into buf without moving self.

fn encode( self, buf: &mut <DB as Database>::ArgumentBuffer<'q>, ) -> Result<IsNull, Box<dyn Error + Sync + Send>>

where Self: Sized,

Writes the value of self into buf in the expected format for the database.

fn produces(&self) -> Option<<DB as Database>::TypeInfo>

fn size_hint(&self) -> usize

impl PgHasArrayType for ContextData

fn array_type_info() -> PgTypeInfo

fn array_compatible(ty: &PgTypeInfo) -> bool

impl Serialize for ContextData

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Type<Postgres> for ContextData

fn type_info() -> PgTypeInfo

Returns the canonical SQL type for this Rust type.

fn compatible(ty: &<DB as Database>::TypeInfo) -> bool

Determines if this Rust type is compatible with the given SQL type.