1// Protocol Buffers - Google's data interchange format 2// Copyright 2008 Google Inc. All rights reserved. 3// https://developers.google.com/protocol-buffers/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31syntax = "proto3"; 32 33package google.protobuf; 34 35option csharp_namespace = "Google.Protobuf.WellKnownTypes"; 36option cc_enable_arenas = true; 37option go_package = "github.com/golang/protobuf/ptypes/timestamp"; 38option java_package = "com.google.protobuf"; 39option java_outer_classname = "TimestampProto"; 40option java_multiple_files = true; 41option objc_class_prefix = "GPB"; 42 43// A Timestamp represents a point in time independent of any time zone or local 44// calendar, encoded as a count of seconds and fractions of seconds at 45// nanosecond resolution. The count is relative to an epoch at UTC midnight on 46// January 1, 1970, in the proleptic Gregorian calendar which extends the 47// Gregorian calendar backwards to year one. 48// 49// All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap 50// second table is needed for interpretation, using a [24-hour linear 51// smear](https://developers.google.com/time/smear). 52// 53// The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By 54// restricting to that range, we ensure that we can convert to and from [RFC 55// 3339](https://www.ietf.org/rfc/rfc3339.txt) date strings. 56// 57// # Examples 58// 59// Example 1: Compute Timestamp from POSIX `time()`. 60// 61// Timestamp timestamp; 62// timestamp.set_seconds(time(NULL)); 63// timestamp.set_nanos(0); 64// 65// Example 2: Compute Timestamp from POSIX `gettimeofday()`. 66// 67// struct timeval tv; 68// gettimeofday(&tv, NULL); 69// 70// Timestamp timestamp; 71// timestamp.set_seconds(tv.tv_sec); 72// timestamp.set_nanos(tv.tv_usec * 1000); 73// 74// Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`. 75// 76// FILETIME ft; 77// GetSystemTimeAsFileTime(&ft); 78// UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime; 79// 80// // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z 81// // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z. 82// Timestamp timestamp; 83// timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL)); 84// timestamp.set_nanos((INT32) ((ticks % 10000000) * 100)); 85// 86// Example 4: Compute Timestamp from Java `System.currentTimeMillis()`. 87// 88// long millis = System.currentTimeMillis(); 89// 90// Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000) 91// .setNanos((int) ((millis % 1000) * 1000000)).build(); 92// 93// 94// Example 5: Compute Timestamp from current time in Python. 95// 96// timestamp = Timestamp() 97// timestamp.GetCurrentTime() 98// 99// # JSON Mapping 100// 101// In JSON format, the Timestamp type is encoded as a string in the 102// [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the 103// format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z" 104// where {year} is always expressed using four digits while {month}, {day}, 105// {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional 106// seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution), 107// are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone 108// is required. A proto3 JSON serializer should always use UTC (as indicated by 109// "Z") when printing the Timestamp type and a proto3 JSON parser should be 110// able to accept both UTC and other timezones (as indicated by an offset). 111// 112// For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past 113// 01:30 UTC on January 15, 2017. 114// 115// In JavaScript, one can convert a Date object to this format using the 116// standard 117// [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString) 118// method. In Python, a standard `datetime.datetime` object can be converted 119// to this format using 120// [`strftime`](https://docs.python.org/2/library/time.html#time.strftime) with 121// the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use 122// the Joda Time's [`ISODateTimeFormat.dateTime()`]( 123// http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D 124// ) to obtain a formatter capable of generating timestamps in this format. 125// 126// 127message Timestamp { 128 // Represents seconds of UTC time since Unix epoch 129 // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to 130 // 9999-12-31T23:59:59Z inclusive. 131 int64 seconds = 1; 132 133 // Non-negative fractions of a second at nanosecond resolution. Negative 134 // second values with fractions must still have non-negative nanos values 135 // that count forward in time. Must be from 0 to 999,999,999 136 // inclusive. 137 int32 nanos = 2; 138} 139