145 lines
6.3 KiB
Protocol Buffer
145 lines
6.3 KiB
Protocol Buffer
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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syntax = "proto3";
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package google.protobuf;
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option cc_enable_arenas = true;
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option go_package = "google.golang.org/protobuf/types/known/timestamppb";
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option java_package = "com.google.protobuf";
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option java_outer_classname = "TimestampProto";
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option java_multiple_files = true;
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option objc_class_prefix = "GPB";
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option csharp_namespace = "Google.Protobuf.WellKnownTypes";
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// A Timestamp represents a point in time independent of any time zone or local
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// calendar, encoded as a count of seconds and fractions of seconds at
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// nanosecond resolution. The count is relative to an epoch at UTC midnight on
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// January 1, 1970, in the proleptic Gregorian calendar which extends the
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// Gregorian calendar backwards to year one.
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//
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// All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap
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// second table is needed for interpretation, using a [24-hour linear
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// smear](https://developers.google.com/time/smear).
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//
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// The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By
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// restricting to that range, we ensure that we can convert to and from [RFC
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// 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings.
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//
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// # Examples
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//
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// Example 1: Compute Timestamp from POSIX `time()`.
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//
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// Timestamp timestamp;
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// timestamp.set_seconds(time(NULL));
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// timestamp.set_nanos(0);
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//
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// Example 2: Compute Timestamp from POSIX `gettimeofday()`.
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//
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// struct timeval tv;
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// gettimeofday(&tv, NULL);
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//
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// Timestamp timestamp;
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// timestamp.set_seconds(tv.tv_sec);
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// timestamp.set_nanos(tv.tv_usec * 1000);
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//
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// Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.
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//
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// FILETIME ft;
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// GetSystemTimeAsFileTime(&ft);
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// UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime;
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//
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// // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
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// // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z.
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// Timestamp timestamp;
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// timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL));
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// timestamp.set_nanos((INT32) ((ticks % 10000000) * 100));
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//
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// Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.
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//
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// long millis = System.currentTimeMillis();
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//
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// Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000)
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// .setNanos((int) ((millis % 1000) * 1000000)).build();
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//
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// Example 5: Compute Timestamp from Java `Instant.now()`.
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//
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// Instant now = Instant.now();
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//
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// Timestamp timestamp =
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// Timestamp.newBuilder().setSeconds(now.getEpochSecond())
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// .setNanos(now.getNano()).build();
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//
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// Example 6: Compute Timestamp from current time in Python.
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//
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// timestamp = Timestamp()
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// timestamp.GetCurrentTime()
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//
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// # JSON Mapping
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//
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// In JSON format, the Timestamp type is encoded as a string in the
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// [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the
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// format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
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// where {year} is always expressed using four digits while {month}, {day},
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// {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional
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// seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution),
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// are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone
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// is required. A proto3 JSON serializer should always use UTC (as indicated by
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// "Z") when printing the Timestamp type and a proto3 JSON parser should be
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// able to accept both UTC and other timezones (as indicated by an offset).
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//
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// For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
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// 01:30 UTC on January 15, 2017.
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//
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// In JavaScript, one can convert a Date object to this format using the
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// standard
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// [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
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// method. In Python, a standard `datetime.datetime` object can be converted
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// to this format using
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// [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with
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// the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use
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// the Joda Time's [`ISODateTimeFormat.dateTime()`](
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// http://joda-time.sourceforge.net/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime()
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// ) to obtain a formatter capable of generating timestamps in this format.
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//
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message Timestamp {
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// Represents seconds of UTC time since Unix epoch
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// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
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// 9999-12-31T23:59:59Z inclusive.
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int64 seconds = 1;
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// Non-negative fractions of a second at nanosecond resolution. Negative
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// second values with fractions must still have non-negative nanos values
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// that count forward in time. Must be from 0 to 999,999,999
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// inclusive.
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int32 nanos = 2;
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}
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