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// Copyright 2018 Google LLC.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
syntax = "proto3";
package google.api;
import "google/api/label.proto";
option go_package = "google.golang.org/genproto/googleapis/api/metric;metric";
option java_multiple_files = true;
option java_outer_classname = "MetricProto";
option java_package = "com.google.api";
option objc_class_prefix = "GAPI";
// Defines a metric type and its schema. Once a metric descriptor is created,
// deleting or altering it stops data collection and makes the metric type's
// existing data unusable.
message MetricDescriptor {
// The kind of measurement. It describes how the data is reported.
enum MetricKind {
// Do not use this default value.
METRIC_KIND_UNSPECIFIED = 0;
// An instantaneous measurement of a value.
GAUGE = 1;
// The change in a value during a time interval.
DELTA = 2;
// A value accumulated over a time interval. Cumulative
// measurements in a time series should have the same start time
// and increasing end times, until an event resets the cumulative
// value to zero and sets a new start time for the following
// points.
CUMULATIVE = 3;
}
// The value type of a metric.
enum ValueType {
// Do not use this default value.
VALUE_TYPE_UNSPECIFIED = 0;
// The value is a boolean.
// This value type can be used only if the metric kind is `GAUGE`.
BOOL = 1;
// The value is a signed 64-bit integer.
INT64 = 2;
// The value is a double precision floating point number.
DOUBLE = 3;
// The value is a text string.
// This value type can be used only if the metric kind is `GAUGE`.
STRING = 4;
// The value is a [`Distribution`][google.api.Distribution].
DISTRIBUTION = 5;
// The value is money.
MONEY = 6;
}
// The resource name of the metric descriptor.
string name = 1;
// The metric type, including its DNS name prefix. The type is not
// URL-encoded. All user-defined custom metric types have the DNS name
// `custom.googleapis.com`. Metric types should use a natural hierarchical
// grouping. For example:
//
// "custom.googleapis.com/invoice/paid/amount"
// "appengine.googleapis.com/http/server/response_latencies"
string type = 8;
// The set of labels that can be used to describe a specific
// instance of this metric type. For example, the
// `appengine.googleapis.com/http/server/response_latencies` metric
// type has a label for the HTTP response code, `response_code`, so
// you can look at latencies for successful responses or just
// for responses that failed.
repeated LabelDescriptor labels = 2;
// Whether the metric records instantaneous values, changes to a value, etc.
// Some combinations of `metric_kind` and `value_type` might not be supported.
MetricKind metric_kind = 3;
// Whether the measurement is an integer, a floating-point number, etc.
// Some combinations of `metric_kind` and `value_type` might not be supported.
ValueType value_type = 4;
// The unit in which the metric value is reported. It is only applicable
// if the `value_type` is `INT64`, `DOUBLE`, or `DISTRIBUTION`. The
// supported units are a subset of [The Unified Code for Units of
// Measure](http://unitsofmeasure.org/ucum.html) standard:
//
// **Basic units (UNIT)**
//
// * `bit` bit
// * `By` byte
// * `s` second
// * `min` minute
// * `h` hour
// * `d` day
//
// **Prefixes (PREFIX)**
//
// * `k` kilo (10**3)
// * `M` mega (10**6)
// * `G` giga (10**9)
// * `T` tera (10**12)
// * `P` peta (10**15)
// * `E` exa (10**18)
// * `Z` zetta (10**21)
// * `Y` yotta (10**24)
// * `m` milli (10**-3)
// * `u` micro (10**-6)
// * `n` nano (10**-9)
// * `p` pico (10**-12)
// * `f` femto (10**-15)
// * `a` atto (10**-18)
// * `z` zepto (10**-21)
// * `y` yocto (10**-24)
// * `Ki` kibi (2**10)
// * `Mi` mebi (2**20)
// * `Gi` gibi (2**30)
// * `Ti` tebi (2**40)
//
// **Grammar**
//
// The grammar also includes these connectors:
//
// * `/` division (as an infix operator, e.g. `1/s`).
// * `.` multiplication (as an infix operator, e.g. `GBy.d`)
//
// The grammar for a unit is as follows:
//
// Expression = Component { "." Component } { "/" Component } ;
//
// Component = ( [ PREFIX ] UNIT | "%" ) [ Annotation ]
// | Annotation
// | "1"
// ;
//
// Annotation = "{" NAME "}" ;
//
// Notes:
//
// * `Annotation` is just a comment if it follows a `UNIT` and is
// equivalent to `1` if it is used alone. For examples,
// `{requests}/s == 1/s`, `By{transmitted}/s == By/s`.
// * `NAME` is a sequence of non-blank printable ASCII characters not
// containing '{' or '}'.
// * `1` represents dimensionless value 1, such as in `1/s`.
// * `%` represents dimensionless value 1/100, and annotates values giving
// a percentage.
string unit = 5;
// A detailed description of the metric, which can be used in documentation.
string description = 6;
// A concise name for the metric, which can be displayed in user interfaces.
// Use sentence case without an ending period, for example "Request count".
// This field is optional but it is recommended to be set for any metrics
// associated with user-visible concepts, such as Quota.
string display_name = 7;
}
// A specific metric, identified by specifying values for all of the
// labels of a [`MetricDescriptor`][google.api.MetricDescriptor].
message Metric {
// An existing metric type, see [google.api.MetricDescriptor][google.api.MetricDescriptor].
// For example, `custom.googleapis.com/invoice/paid/amount`.
string type = 3;
// The set of label values that uniquely identify this metric. All
// labels listed in the `MetricDescriptor` must be assigned values.
map<string, string> labels = 2;
}
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