Struct SessionMetadata 

pub struct SessionMetadata {
    pub session_id: String,
    pub session_seq: u64,
    pub event_seq: u64,
    pub session_sample_rate: f64,
    pub session_start_time: Option<String>,
}

Session metadata attached to each in-session event.

Serialized into the event payload for downstream session-level analysis.

PartialEq is derived (using f64::eq for session_sample_rate). Eq is implemented manually — it is sound because session_sample_rate is always clamped to [0.0, 1.0] and is therefore never NaN. Tests should prefer asserting on individual fields rather than whole-struct equality for clarity.

Fields

session_id: String

The unique UUID for this session.

session_seq: u64

Monotonically increasing session counter, persisted across restarts.

event_seq: u64

Per-session event counter, reset at each new session.

session_sample_rate: f64

The sampling rate in effect for this session.

session_start_time: Option<String>

Wall-clock timestamp at session start (RFC 3339). Absent on events from before sessions introduced this field.

Trait Implementations

impl Clone for SessionMetadata

fn clone(&self) -> SessionMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<UT> ConvertError<UT> for SessionMetadata

fn try_convert_unexpected_callback_error( e: UnexpectedUniFFICallbackError, ) -> Result<Self>

impl Debug for SessionMetadata

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SessionMetadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for SessionMetadata

impl<UT> FfiConverter<UT> for SessionMetadata

const TYPE_ID_META: MetadataBuffer

Type ID metadata, serialized into a MetadataBuffer.

type FfiType = RustBuffer

The low-level type used for passing values of this type over the FFI.

fn lower(v: Self) -> RustBuffer

Lower a rust value of the target type, into an FFI value of type Self::FfiType.

fn try_lift(buf: RustBuffer) -> Result<Self>

Lift a rust value of the target type, from an FFI value of type Self::FfiType.

fn write(obj: Self, buf: &mut Vec<u8>)

Write a rust value into a buffer, to send over the FFI in serialized form.

fn try_read(buf: &mut &[u8]) -> Result<Self>

Read a rust value from a buffer, received over the FFI in serialized form.

impl<UT> Lift<UT> for SessionMetadata

type FfiType = <SessionMetadata as FfiConverter<UT>>::FfiType

fn try_lift(v: Self::FfiType) -> Result<Self>

fn try_read(buf: &mut &[u8]) -> Result<Self>

fn try_lift_from_rust_buffer(v: RustBuffer) -> Result<Self, Error>

Convenience method

impl<UT> LiftRef<UT> for SessionMetadata

type LiftType = SessionMetadata

impl<UT> LiftReturn<UT> for SessionMetadata

type ReturnType = <SessionMetadata as Lift<UT>>::FfiType

FFI return type for trait interfaces

fn try_lift_successful_return(v: Self::ReturnType) -> Result<Self>

Lift a successfully returned value from a trait interface

fn lift_foreign_return( ffi_return: Self::ReturnType, call_status: RustCallStatus, ) -> Self

Lift a foreign returned value from a trait interface

fn lift_error(_buf: RustBuffer) -> Self

Lift a Rust value for a callback interface method error result

fn handle_callback_unexpected_error(e: UnexpectedUniFFICallbackError) -> Self

Lift a Rust value for an unexpected callback interface error

impl<UT> Lower<UT> for SessionMetadata

type FfiType = <SessionMetadata as FfiConverter<UT>>::FfiType

fn lower(obj: Self) -> Self::FfiType

fn write(obj: Self, buf: &mut Vec<u8>)

fn lower_into_rust_buffer(obj: Self) -> RustBuffer

Convenience method

impl<UT> LowerError<UT> for SessionMetadata

fn lower_error(obj: Self) -> RustBuffer

Lower this value for scaffolding function return

impl<UT> LowerReturn<UT> for SessionMetadata

type ReturnType = <SessionMetadata as Lower<UT>>::FfiType

The type that should be returned by scaffolding functions for this type.

fn lower_return(v: Self) -> Result<Self::ReturnType, RustCallError>

Lower the return value from an scaffolding call

fn handle_failed_lift( error: LiftArgsError, ) -> Result<Self::ReturnType, RustCallError>

Lower the return value for failed argument lifts

impl MallocSizeOf for SessionMetadata

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl PartialEq for SessionMetadata

fn eq(&self, other: &SessionMetadata) -> 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 Serialize for SessionMetadata

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 SessionMetadata

impl<UT> TypeId<UT> for SessionMetadata

const TYPE_ID_META: MetadataBuffer