Struct StatMsg 

pub struct StatMsg {
    pub hd: RecordHeader,
    pub ts_recv: u64,
    pub ts_ref: u64,
    pub price: i64,
    pub quantity: i64,
    pub sequence: u32,
    pub ts_in_delta: i32,
    pub stat_type: u16,
    pub channel_id: u16,
    pub update_action: u8,
    pub stat_flags: u8,
    /* private fields */
}

A statistics message. A catchall for various data disseminated by publishers. The stat_type indicates the statistic contained in the message.

Fields

hd: RecordHeader

The common header.

ts_recv: u64

The capture-server-received timestamp expressed as the number of nanoseconds since the UNIX epoch.

See ts_recv.

ts_ref: u64

The reference timestamp of the statistic value expressed as the number of nanoseconds since the UNIX epoch. Will be UNDEF_TIMESTAMP when unused.

price: i64

The value for price statistics where every 1 unit corresponds to 1e-9, i.e. 1/1,000,000,000 or 0.000000001. Will be UNDEF_PRICE when unused.

See Prices.

quantity: i64

The value for non-price statistics. Will be UNDEF_STAT_QUANTITY when unused.

sequence: u32

The message sequence number assigned at the venue.

ts_in_delta: i32

The matching-engine-sending timestamp expressed as the number of nanoseconds before ts_recv.

See ts_in_delta.

stat_type: u16

The type of statistic value contained in the message. Refer to the StatType enum for possible variants.

channel_id: u16

The channel ID assigned by Databento as an incrementing integer starting at zero.

update_action: u8

Indicates if the statistic is newly added (1) or deleted (2). (Deleted is only used with some stat types).

stat_flags: u8

Additional flags associate with certain stat types.

Implementations

impl StatMsg

pub fn ts_recv(&self) -> Option<OffsetDateTime>

Parses the capture-server-received timestamp into a datetime. Returns None if ts_recv contains the sentinel for a null timestamp.

pub fn ts_ref(&self) -> Option<OffsetDateTime>

Parses the reference timestamp of the statistic value into a datetime. Returns None if ts_ref contains the sentinel for a null timestamp.

pub fn price_f64(&self) -> f64

Converts the value for price statistics to a floating point.

UNDEF_PRICE will be converted to NaN.

This may introduce floating-point error.

pub fn ts_in_delta(&self) -> Duration

Parses the difference between ts_recv and the matching-engine-sending timestamp into a duration.

pub fn stat_type(&self) -> Result<StatType>

Parses the type of statistic value into an enum.

Errors

This function returns an error if the stat_type field does not contain a valid StatType.

pub fn update_action(&self) -> Result<StatUpdateAction>

Parses the update action into an enum.

Errors

This function returns an error if the update_action field does not contain a valid StatUpdateAction.

Trait Implementations

impl AsRef<[u8]> for StatMsg

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for StatMsg

fn clone(&self) -> StatMsg

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StatMsg

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

Formats the value using the given formatter.

impl Default for StatMsg

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for StatMsg

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a> From<&'a StatMsg> for RecordRefEnum<'a>

fn from(rec: &'a StatMsg) -> Self

Converts to this type from the input type.

impl From<&StatMsgV1> for StatMsg

fn from(old: &StatMsg) -> Self

Converts to this type from the input type.

impl From<StatMsg> for RecordEnum

fn from(rec: StatMsg) -> Self

Converts to this type from the input type.

impl HasRType for StatMsg

fn has_rtype(rtype: u8) -> bool

Returns true if rtype matches the value associated with the implementing type.

impl Hash for StatMsg

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'py> IntoPyObject<'py> for StatMsg

Available on crate feature python only.

Convert bare StatMsg to Python by wrapping with UNDEF_TIMESTAMP for ts_out.

type Target = PyAny

The Python output type

type Output = Bound<'py, PyAny>

The smart pointer type to use.

type Error = PyErr

The type returned in the event of a conversion error.

fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error>

Performs the conversion.

impl PartialEq for StatMsg

fn eq(&self, other: &StatMsg) -> 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 PartialOrd for StatMsg

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Record for StatMsg

fn header(&self) -> &RecordHeader

Returns a reference to the RecordHeader that comes at the beginning of all record types.

fn raw_index_ts(&self) -> u64

Returns the raw primary timestamp for the record.

fn record_size(&self) -> usize

Returns the size of the record in bytes.

fn rtype(&self) -> Result<RType>

Tries to convert the raw record type into an enum which is useful for exhaustive pattern matching.

fn publisher(&self) -> Result<Publisher>

Tries to convert the raw publisher_id into an enum which is useful for exhaustive pattern matching.

fn index_ts(&self) -> Option<OffsetDateTime>

Returns the primary timestamp for the record. Returns None if the primary timestamp contains the sentinel value for a null timestamp.

fn index_date(&self) -> Option<Date>

Returns the primary date for the record; the date component of the primary timestamp (index_ts()). Returns None if the primary timestamp contains the sentinel value for a null timestamp.

impl RecordMut for StatMsg

fn header_mut(&mut self) -> &mut RecordHeader

Returns a mutable reference to the RecordHeader that comes at the beginning of all record types.

impl Serialize for StatMsg

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StatRec for StatMsg

const UNDEF_STAT_QUANTITY: i64 = UNDEF_STAT_QUANTITY

The sentinel value for a null quantity.

fn stat_type(&self) -> Result<StatType>

Tries to convert the raw type of the statistic value to an enum.

fn ts_recv(&self) -> Option<OffsetDateTime>

Parses the raw capture-server-received timestamp into a datetime. Returns None if ts_recv contains the sentinel for a null timestamp.

fn ts_ref(&self) -> Option<OffsetDateTime>

Parses the raw reference timestamp of the statistic value into a datetime. Returns None if ts_ref contains the sentinel for a null timestamp.

fn update_action(&self) -> Result<StatUpdateAction>

Tries to convert the raw update_action to an enum.

fn price(&self) -> i64

The value for price statistics expressed as a signed integer where every 1 unit corresponds to 1e-9, i.e. 1/1,000,000,000 or 0.000000001. Will be UNDEF_PRICE when unused.

fn quantity(&self) -> i64

The value for quantity statistics. Will be UNDEF_STAT_QUANTITY when unused.

impl WritePyRepr for StatMsg

Available on crate feature python only.

fn write_py_repr(&self, s: &mut String) -> Result

Writes a Python-style string representation to s.

const SHOULD_FLATTEN: bool = false

Whether this type’s fields should be flattened into the parent repr.

impl Copy for StatMsg

impl Eq for StatMsg

impl StructuralPartialEq for StatMsg