Package software.amazon.awscdk.services.emr

Interface CfnCluster.ScalingRuleProperty

All Superinterfaces:

software.amazon.jsii.JsiiSerializable

All Known Implementing Classes:

CfnCluster.ScalingRuleProperty.Jsii$Proxy

Enclosing class:

CfnCluster

@Stability(Stable)
public static interface CfnCluster.ScalingRuleProperty
extends software.amazon.jsii.JsiiSerializable

ScalingRule is a subproperty of the AutoScalingPolicy property type.

ScalingRule defines the scale-in or scale-out rules for scaling activity, including the CloudWatch metric alarm that triggers activity, how EC2 instances are added or removed, and the periodicity of adjustments. The automatic scaling policy for an instance group can comprise one or more automatic scaling rules.

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.emr.*;
 ScalingRuleProperty scalingRuleProperty = ScalingRuleProperty.builder()
         .action(ScalingActionProperty.builder()
                 .simpleScalingPolicyConfiguration(SimpleScalingPolicyConfigurationProperty.builder()
                         .scalingAdjustment(123)
                         // the properties below are optional
                         .adjustmentType("adjustmentType")
                         .coolDown(123)
                         .build())
                 // the properties below are optional
                 .market("market")
                 .build())
         .name("name")
         .trigger(ScalingTriggerProperty.builder()
                 .cloudWatchAlarmDefinition(CloudWatchAlarmDefinitionProperty.builder()
                         .comparisonOperator("comparisonOperator")
                         .metricName("metricName")
                         .period(123)
                         .threshold(123)
                         // the properties below are optional
                         .dimensions(List.of(MetricDimensionProperty.builder()
                                 .key("key")
                                 .value("value")
                                 .build()))
                         .evaluationPeriods(123)
                         .namespace("namespace")
                         .statistic("statistic")
                         .unit("unit")
                         .build())
                 .build())
         // the properties below are optional
         .description("description")
         .build();
 

See Also:

• http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-emr-cluster-scalingrule.html

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static final class	CfnCluster.ScalingRuleProperty.Builder	A builder for CfnCluster.ScalingRuleProperty
static final class	CfnCluster.ScalingRuleProperty.Jsii$Proxy	An implementation for CfnCluster.ScalingRuleProperty

Method Summary

Modifier and Type	Method	Description
static CfnCluster.ScalingRuleProperty.Builder	builder()
Object	getAction()	The conditions that trigger an automatic scaling activity.
default String	getDescription()	A friendly, more verbose description of the automatic scaling rule.
String	getName()	The name used to identify an automatic scaling rule.
Object	getTrigger()	The CloudWatch alarm definition that determines when automatic scaling activity is triggered.

Methods inherited from interface software.amazon.jsii.JsiiSerializable

$jsii$toJson

Method Details

getAction

@Stability(Stable)
@NotNull
Object getAction()

The conditions that trigger an automatic scaling activity.

See Also:

• http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-emr-cluster-scalingrule.html#cfn-emr-cluster-scalingrule-action

getName

@Stability(Stable)
@NotNull
String getName()

The name used to identify an automatic scaling rule.

Rule names must be unique within a scaling policy.

See Also:

• http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-emr-cluster-scalingrule.html#cfn-emr-cluster-scalingrule-name

getTrigger

@Stability(Stable)
@NotNull
Object getTrigger()

The CloudWatch alarm definition that determines when automatic scaling activity is triggered.

See Also:

• http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-emr-cluster-scalingrule.html#cfn-emr-cluster-scalingrule-trigger

getDescription

@Stability(Stable)
@Nullable
default String getDescription()

A friendly, more verbose description of the automatic scaling rule.

See Also:

• http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-emr-cluster-scalingrule.html#cfn-emr-cluster-scalingrule-description

builder

@Stability(Stable)
static CfnCluster.ScalingRuleProperty.Builder builder()

Returns:

a CfnCluster.ScalingRuleProperty.Builder of CfnCluster.ScalingRuleProperty