Interface CfnAnomalyDetectorPropsMixin.IMetricDataQueryProperty
This structure is used in both GetMetricData and PutMetricAlarm .
Namespace: Amazon.CDK.Mixins.Preview.AWS.CloudWatch.Mixins
Assembly: Amazon.CDK.Mixins.Preview.dll
Syntax (csharp)
public interface CfnAnomalyDetectorPropsMixin.IMetricDataQueryPropertySyntax (vb)
Public Interface CfnAnomalyDetectorPropsMixin.IMetricDataQueryPropertyRemarks
The supported use of this structure is different for those two operations.
When used in GetMetricData , it indicates the metric data to return, and whether this call is just retrieving a batch set of data for one metric, or is performing a Metrics Insights query or a math expression. A single GetMetricData call can include up to 500 MetricDataQuery structures.
When used in PutMetricAlarm , it enables you to create an alarm based on a metric math expression. Each MetricDataQuery in the array specifies either a metric to retrieve, or a math expression to be performed on retrieved metrics. A single PutMetricAlarm call can include up to 20 MetricDataQuery structures in the array. The 20 structures can include as many as 10 structures that contain a MetricStat parameter to retrieve a metric, and as many as 10 structures that contain the Expression parameter to perform a math expression. Of those Expression structures, one must have true as the value for ReturnData . The result of this expression is the value the alarm watches.
Any expression used in a PutMetricAlarm operation must return a single time series. For more information, see Metric Math Syntax and Functions in the Amazon CloudWatch User Guide .
Some of the parameters of this structure also have different uses whether you are using this structure in a GetMetricData operation or a PutMetricAlarm operation. These differences are explained in the following parameter list.
ExampleMetadata: fixture=_generated
Examples
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
using Amazon.CDK.Mixins.Preview.AWS.CloudWatch.Mixins;
var metricDataQueryProperty = new MetricDataQueryProperty {
AccountId = "accountId",
Expression = "expression",
Id = "id",
Label = "label",
MetricStat = new MetricStatProperty {
Metric = new MetricProperty {
Dimensions = new [] { new DimensionProperty {
Name = "name",
Value = "value"
} },
MetricName = "metricName",
Namespace = "namespace"
},
Period = 123,
Stat = "stat",
Unit = "unit"
},
Period = 123,
ReturnData = false
};Synopsis
Properties
| AccountId | The ID of the account where the metrics are located. |
| Expression | This field can contain either a Metrics Insights query, or a metric math expression to be performed on the returned data. |
| Id | A short name used to tie this object to the results in the response. |
| Label | A human-readable label for this metric or expression. |
| MetricStat | The metric to be returned, along with statistics, period, and units. |
| Period | The granularity, in seconds, of the returned data points. |
| ReturnData | When used in |
Properties
AccountId
The ID of the account where the metrics are located.
string? AccountId { get; }Property Value
Remarks
If you are performing a GetMetricData operation in a monitoring account, use this to specify which account to retrieve this metric from.
If you are performing a PutMetricAlarm operation, use this to specify which account contains the metric that the alarm is watching.
Expression
This field can contain either a Metrics Insights query, or a metric math expression to be performed on the returned data.
string? Expression { get; }Property Value
Remarks
For more information about Metrics Insights queries, see Metrics Insights query components and syntax in the Amazon CloudWatch User Guide .
A math expression can use the Id of the other metrics or queries to refer to those metrics, and can also use the Id of other expressions to use the result of those expressions. For more information about metric math expressions, see Metric Math Syntax and Functions in the Amazon CloudWatch User Guide .
Within each MetricDataQuery object, you must specify either Expression or MetricStat but not both.
Id
A short name used to tie this object to the results in the response.
string? Id { get; }Property Value
Remarks
This name must be unique within a single call to GetMetricData . If you are performing math expressions on this set of data, this name represents that data and can serve as a variable in the mathematical expression. The valid characters are letters, numbers, and underscore. The first character must be a lowercase letter.
Label
A human-readable label for this metric or expression.
string? Label { get; }Property Value
Remarks
This is especially useful if this is an expression, so that you know what the value represents. If the metric or expression is shown in a CloudWatch dashboard widget, the label is shown. If Label is omitted, CloudWatch generates a default.
You can put dynamic expressions into a label, so that it is more descriptive. For more information, see Using Dynamic Labels .
MetricStat
The metric to be returned, along with statistics, period, and units.
object? MetricStat { get; }Property Value
Remarks
Use this parameter only if this object is retrieving a metric and not performing a math expression on returned data.
Within one MetricDataQuery object, you must specify either Expression or MetricStat but not both.
Type union: either IResolvable or CfnAnomalyDetectorPropsMixin.IMetricStatProperty
Period
The granularity, in seconds, of the returned data points.
double? Period { get; }Property Value
Remarks
For metrics with regular resolution, a period can be as short as one minute (60 seconds) and must be a multiple of 60. For high-resolution metrics that are collected at intervals of less than one minute, the period can be 1, 5, 10, 20, 30, 60, or any multiple of 60. High-resolution metrics are those metrics stored by a PutMetricData operation that includes a StorageResolution of 1 second .
ReturnData
When used in GetMetricData , this option indicates whether to return the timestamps and raw data values of this metric.
object? ReturnData { get; }Property Value
Remarks
If you are performing this call just to do math expressions and do not also need the raw data returned, you can specify false . If you omit this, the default of true is used.
When used in PutMetricAlarm , specify true for the one expression result to use as the alarm. For all other metrics and expressions in the same PutMetricAlarm operation, specify ReturnData as False.
Type union: either bool or IResolvable