software.amazon.awscdk.services.stepfunctions.tasks

Interface EmrCreateCluster.CloudWatchAlarmDefinitionProperty

All Known Implementing Classes:

EmrCreateCluster.CloudWatchAlarmDefinitionProperty.Jsii$Proxy

Enclosing class:

EmrCreateCluster

public static interface EmrCreateCluster.CloudWatchAlarmDefinitionProperty

The definition of a CloudWatch metric alarm, which determines when an automatic scaling activity is triggered.

When the defined alarm conditions are satisfied, scaling activity begins.

Example:

 // The code below shows an example of how to instantiate this type.
 // The values are placeholders you should change.
 import software.amazon.awscdk.services.stepfunctions.tasks.*;
 import software.amazon.awscdk.core.*;
 CloudWatchAlarmDefinitionProperty cloudWatchAlarmDefinitionProperty = CloudWatchAlarmDefinitionProperty.builder()
         .comparisonOperator(EmrCreateCluster.getCloudWatchAlarmComparisonOperator().GREATER_THAN_OR_EQUAL)
         .metricName("metricName")
         .period(Duration.minutes(30))
         // the properties below are optional
         .dimensions(List.of(MetricDimensionProperty.builder()
                 .key("key")
                 .value("value")
                 .build()))
         .evaluationPeriods(123)
         .namespace("namespace")
         .statistic(EmrCreateCluster.getCloudWatchAlarmStatistic().SAMPLE_COUNT)
         .threshold(123)
         .unit(EmrCreateCluster.getCloudWatchAlarmUnit().NONE)
         .build();
 

See Also:

https://docs.aws.amazon.com/emr/latest/APIReference/API_CloudWatchAlarmDefinition.html

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	EmrCreateCluster.CloudWatchAlarmDefinitionProperty.Builder A builder for EmrCreateCluster.CloudWatchAlarmDefinitionProperty
static class	EmrCreateCluster.CloudWatchAlarmDefinitionProperty.Jsii$Proxy An implementation for EmrCreateCluster.CloudWatchAlarmDefinitionProperty

Method Summary

Modifier and Type	Method and Description
static EmrCreateCluster.CloudWatchAlarmDefinitionProperty.Builder	builder()
EmrCreateCluster.CloudWatchAlarmComparisonOperator	getComparisonOperator() Determines how the metric specified by MetricName is compared to the value specified by Threshold.
default java.util.List<EmrCreateCluster.MetricDimensionProperty>	getDimensions() A CloudWatch metric dimension.
default java.lang.Number	getEvaluationPeriods() The number of periods, in five-minute increments, during which the alarm condition must exist before the alarm triggers automatic scaling activity.
java.lang.String	getMetricName() The name of the CloudWatch metric that is watched to determine an alarm condition.
default java.lang.String	getNamespace() The namespace for the CloudWatch metric.
Duration	getPeriod() The period, in seconds, over which the statistic is applied.
default EmrCreateCluster.CloudWatchAlarmStatistic	getStatistic() The statistic to apply to the metric associated with the alarm.
default java.lang.Number	getThreshold() The value against which the specified statistic is compared.
default EmrCreateCluster.CloudWatchAlarmUnit	getUnit() The unit of measure associated with the CloudWatch metric being watched.

Method Detail

getComparisonOperator

EmrCreateCluster.CloudWatchAlarmComparisonOperator getComparisonOperator()

Determines how the metric specified by MetricName is compared to the value specified by Threshold.

getMetricName

java.lang.String getMetricName()

The name of the CloudWatch metric that is watched to determine an alarm condition.

getPeriod

Duration getPeriod()

The period, in seconds, over which the statistic is applied.

EMR CloudWatch metrics are emitted every five minutes (300 seconds), so if an EMR CloudWatch metric is specified, specify 300.

getDimensions

default java.util.List<EmrCreateCluster.MetricDimensionProperty> getDimensions()

A CloudWatch metric dimension.

Default: - No dimensions

getEvaluationPeriods

default java.lang.Number getEvaluationPeriods()

The number of periods, in five-minute increments, during which the alarm condition must exist before the alarm triggers automatic scaling activity.

Default: 1

getNamespace

default java.lang.String getNamespace()

The namespace for the CloudWatch metric.

Default: 'AWS/ElasticMapReduce'

getStatistic

default EmrCreateCluster.CloudWatchAlarmStatistic getStatistic()

The statistic to apply to the metric associated with the alarm.

Default: CloudWatchAlarmStatistic.AVERAGE

getThreshold

default java.lang.Number getThreshold()

The value against which the specified statistic is compared.

Default: - None

getUnit

default EmrCreateCluster.CloudWatchAlarmUnit getUnit()

The unit of measure associated with the CloudWatch metric being watched.

The value specified for Unit must correspond to the units specified in the CloudWatch metric.

Default: CloudWatchAlarmUnit.NONE

builder

static EmrCreateCluster.CloudWatchAlarmDefinitionProperty.Builder builder()

Returns:

a EmrCreateCluster.CloudWatchAlarmDefinitionProperty.Builder of EmrCreateCluster.CloudWatchAlarmDefinitionProperty