duration.rb in google-cloud-monitoring-0.26.0

- old
+ new

@@ -19,10 +19,12 @@
     # resolution. It is independent of any calendar and concepts like "day"
     # or "month". It is related to Timestamp in that the difference between
     # two Timestamp values is a Duration and it can be added or subtracted
     # from a Timestamp. Range is approximately +-10,000 years.
     #
+    # = Examples
+    #
     # Example 1: Compute Duration from two Timestamps in pseudo code.
     #
     #     Timestamp start = ...;
     #     Timestamp end = ...;
     #     Duration duration = ...;
@@ -58,13 +60,24 @@
     # Example 3: Compute Duration from datetime.timedelta in Python.
     #
     #     td = datetime.timedelta(days=3, minutes=10)
     #     duration = Duration()
     #     duration.FromTimedelta(td)
+    #
+    # = JSON Mapping
+    #
+    # In JSON format, the Duration type is encoded as a string rather than an
+    # object, where the string ends in the suffix "s" (indicating seconds) and
+    # is preceded by the number of seconds, with nanoseconds expressed as
+    # fractional seconds. For example, 3 seconds with 0 nanoseconds should be
+    # encoded in JSON format as "3s", while 3 seconds and 1 nanosecond should
+    # be expressed in JSON format as "3.000000001s", and 3 seconds and 1
+    # microsecond should be expressed in JSON format as "3.000001s".
     # @!attribute [rw] seconds
     #   @return [Integer]
     #     Signed seconds of the span of time. Must be from -315,576,000,000
-    #     to +315,576,000,000 inclusive.
+    #     to +315,576,000,000 inclusive. Note: these bounds are computed from:
+    #     60 sec/min * 60 min/hr * 24 hr/day * 365.25 days/year * 10000 years
     # @!attribute [rw] nanos
     #   @return [Integer]
     #     Signed fractions of a second at nanosecond resolution of the span
     #     of time. Durations less than one second are represented with a 0
     #     +seconds+ field and a positive or negative +nanos+ field. For durations
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