[−][src]Struct prost_types::Timestamp
A Timestamp represents a point in time independent of any time zone or calendar, represented as seconds and fractions of seconds at nanosecond resolution in UTC Epoch time. It is encoded using the Proleptic Gregorian Calendar which extends the Gregorian calendar backwards to year one. It is encoded assuming all minutes are 60 seconds long, i.e. leap seconds are "smeared" so that no leap second table is needed for interpretation. 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. See https://www.ietf.org/rfc/rfc3339.txt.
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 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()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/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. Must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z inclusive.
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.
Trait Implementations
impl PartialEq<Timestamp> for Timestamp
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impl Default for Timestamp
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impl From<SystemTime> for Timestamp
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Converts a std::time::SystemTime
to a Timestamp
.
fn from(time: SystemTime) -> Timestamp
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impl From<Timestamp> for Result<SystemTime, Duration>
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Converts a Timestamp
to a SystemTime
, or if the timestamp falls before the Unix epoch, a
duration containing the difference.
impl Clone for Timestamp
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fn clone(&self) -> Timestamp
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl Debug for Timestamp
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impl Message for Timestamp
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fn encode_raw<B>(&self, buf: &mut B) where
B: BufMut,
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B: BufMut,
fn merge_field<B>(&mut self, buf: &mut B) -> Result<(), DecodeError> where
B: Buf,
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B: Buf,
fn encoded_len(&self) -> usize
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fn clear(&mut self)
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fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError> where
B: BufMut,
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B: BufMut,
Encodes the message to a buffer. Read more
fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError> where
B: BufMut,
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B: BufMut,
Encodes the message with a length-delimiter to a buffer. Read more
fn decode<B>(buf: B) -> Result<Self, DecodeError> where
B: IntoBuf,
Self: Default,
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B: IntoBuf,
Self: Default,
Decodes an instance of the message from a buffer. Read more
fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError> where
B: IntoBuf,
Self: Default,
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B: IntoBuf,
Self: Default,
Decodes a length-delimited instance of the message from the buffer.
fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError> where
B: IntoBuf,
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B: IntoBuf,
Decodes an instance of the message from a buffer, and merges it into self
. Read more
fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError> where
B: IntoBuf,
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B: IntoBuf,
Decodes a length-delimited instance of the message from buffer, and merges it into self
. Read more
Auto Trait Implementations
Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
impl<T> From for T
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impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,