Struct bilrost_types::Timestamp

pub struct Timestamp {
    pub seconds: i64,
    pub nanos: i32,
}

A Timestamp represents a point in time independent of any time zone or local calendar, encoded as a count of seconds and fractions of seconds at nanosecond resolution. The count is relative to an epoch at UTC midnight on January 1, 1970, in the proleptic Gregorian calendar which extends the Gregorian calendar backwards to year one.

All minutes are 60 seconds long. Leap seconds are “smeared” so that no leap second table is needed for interpretation, using a 24-hour linear smear.

The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By restricting to that range, we ensure that we can convert to and from RFC 3339 date strings.

Values of this type are not guaranteed to only exist in their normalized form.

Examples

Example 1: Compute Timestamp from POSIX time().

Timestamp timestamp;
timestamp.set_seconds(time(NULL));
timestamp.set_nanos(0);

Example 2: Compute Timestamp from POSIX gettimeofday().

struct timeval tv;
gettimeofday(&tv, NULL);

Timestamp timestamp;
timestamp.set_seconds(tv.tv_sec);
timestamp.set_nanos(tv.tv_usec * 1000);

Example 3: Compute Timestamp from Win32 GetSystemTimeAsFileTime().

FILETIME ft;
GetSystemTimeAsFileTime(&ft);
UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;

// A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
// is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
Timestamp timestamp;
timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));

Example 4: Compute Timestamp from Java System.currentTimeMillis().

long millis = System.currentTimeMillis();

Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
     .setNanos((int) ((millis % 1000) * 1000000)).build();

Example 5: Compute Timestamp from Java Instant.now().

Instant now = Instant.now();

Timestamp timestamp =
     Timestamp.newBuilder().setSeconds(now.getEpochSecond())
         .setNanos(now.getNano()).build();

Example 6: Compute Timestamp from current time in Python.

timestamp = Timestamp()
timestamp.GetCurrentTime()

JSON Mapping

In JSON format, the Timestamp type is encoded as a string in the RFC 3339 format. That is, the format is “{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z” where {year} is always expressed using four digits while {month}, {day}, {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution), are optional. The “Z” suffix indicates the timezone (“UTC”); the timezone is required. A proto3 JSON serializer should always use UTC (as indicated by “Z”) when printing the Timestamp type and a proto3 JSON parser should be able to accept both UTC and other timezones (as indicated by an offset).

For example, “2017-01-15T01:30:15.01Z” encodes 15.01 seconds past 01:30 UTC on January 15, 2017.

In JavaScript, one can convert a Date object to this format using the standard toISOString() method. In Python, a standard datetime.datetime object can be converted to this format using strftime with the time format spec ‘%Y-%m-%dT%H:%M:%S.%fZ’. Likewise, in Java, one can use the Joda Time’s ISODateTimeFormat.dateTime() to obtain a formatter capable of generating timestamps in this format.

Fields

seconds: i64

Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.

nanos: i32

Non-negative fractions of a second at nanosecond resolution. Negative second values with fractions must still have non-negative nanos values that count forward in time. Must be from 0 to 999,999,999 inclusive.

Implementations

impl Timestamp

pub const MIN: Self = _

pub const MAX: Self = _

impl Timestamp

pub fn is_canonical(&self) -> bool

Returns true iff the timestamp is already normalized.

pub fn normalize(&mut self)

Normalizes the timestamp to a canonical format.

Based on google::protobuf::util::CreateNormalized.

pub fn try_normalize(self) -> Result<Timestamp, Timestamp>

Normalizes the timestamp to a canonical format, returning the original value if it cannot be normalized.

Normalization is based on google::protobuf::util::CreateNormalized.

pub fn date(year: i64, month: u8, day: u8) -> Result<Timestamp, TimestampError>

Creates a new Timestamp at the start of the provided UTC date.

pub fn date_time( year: i64, month: u8, day: u8, hour: u8, minute: u8, second: u8 ) -> Result<Timestamp, TimestampError>

Creates a new Timestamp instance with the provided UTC date and time.

pub fn date_time_nanos( year: i64, month: u8, day: u8, hour: u8, minute: u8, second: u8, nanos: u32 ) -> Result<Timestamp, TimestampError>

Creates a new Timestamp instance with the provided UTC date and time.

Trait Implementations

impl Clone for Timestamp

fn clone(&self) -> Timestamp

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Timestamp

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

Formats the value using the given formatter.

impl Display for Timestamp

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

Formats the value using the given formatter.

impl EmptyState for Timestamp

where i32: EmptyState + Encoder<fixed>, i64: EmptyState + Encoder<general>,

fn empty() -> Self

Produces the empty state for this type.

fn is_empty(&self) -> bool

Returns true iff this instance is in the empty state.

fn clear(&mut self)

impl From<SystemTime> for Timestamp

fn from(system_time: SystemTime) -> Timestamp

Converts to this type from the input type.

impl FromStr for Timestamp

type Err = TimestampError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Timestamp, TimestampError>

Parses a string s to return a value of this type.

impl Hash for Timestamp

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 PartialEq for Timestamp

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Timestamp

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

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl RawDistinguishedMessage for Timestamp

where Self: Eq, i32: DistinguishedEncoder<fixed> + EmptyState, i64: DistinguishedEncoder<general> + EmptyState,

fn raw_decode_field_distinguished<__B>( &mut self, tag: u32, wire_type: WireType, duplicated: bool, buf: Capped<'_, __B>, ctx: DecodeContext ) -> Result<Canonicity, DecodeError>

where __B: Buf + ?Sized,

impl RawMessage for Timestamp

where i32: EmptyState + Encoder<fixed>, i64: EmptyState + Encoder<general>,

const __ASSERTIONS: () = _

fn raw_encode<__B>(&self, buf: &mut __B)

where __B: BufMut + ?Sized,

Encodes the message to a buffer.

fn raw_prepend<__B>(&self, buf: &mut __B)

where __B: ReverseBuf + ?Sized,

Prepends the message to a prepend buffer.

fn raw_decode_field<__B>( &mut self, tag: u32, wire_type: WireType, duplicated: bool, buf: Capped<'_, __B>, ctx: DecodeContext ) -> Result<(), DecodeError>

where __B: Buf + ?Sized,

Decodes a field from a buffer into self.

fn raw_encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

impl TryFrom<Timestamp> for SystemTime

type Error = TimestampError

The type returned in the event of a conversion error.

fn try_from(timestamp: Timestamp) -> Result<SystemTime, Self::Error>

Performs the conversion.

impl Eq for Timestamp

impl StructuralPartialEq for Timestamp