Copyright	(c) 2013-2021 Brendan Hay
License	Mozilla Public License, v. 2.0.
Maintainer	Brendan Hay <brendan.g.hay+amazonka@gmail.com>
Stability	auto-generated
Portability	non-portable (GHC extensions)
Safe Haskell	None

Amazonka.CloudWatchEvents.Types.PlacementConstraint

Description

Documentation

data PlacementConstraint Source #

An object representing a constraint on task placement. To learn more, see Task Placement Constraints in the Amazon Elastic Container Service Developer Guide.

See: newPlacementConstraint smart constructor.

Constructors

PlacementConstraint'

Fields

expression :: Maybe Text
A cluster query language expression to apply to the constraint. You cannot specify an expression if the constraint type is distinctInstance. To learn more, see Cluster Query Language in the Amazon Elastic Container Service Developer Guide.
type' :: Maybe PlacementConstraintType
The type of constraint. Use distinctInstance to ensure that each task in a particular group is running on a different container instance. Use memberOf to restrict the selection to a group of valid candidates.

Instances

Instances details

Eq PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Methods (==) :: PlacementConstraint -> PlacementConstraint -> Bool # (/=) :: PlacementConstraint -> PlacementConstraint -> Bool #
Read PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Methods readsPrec :: Int -> ReadS PlacementConstraint # readList :: ReadS [PlacementConstraint] # readPrec :: ReadPrec PlacementConstraint # readListPrec :: ReadPrec [PlacementConstraint] #
Show PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Methods showsPrec :: Int -> PlacementConstraint -> ShowS # show :: PlacementConstraint -> String # showList :: [PlacementConstraint] -> ShowS #
Generic PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Associated Types type Rep PlacementConstraint :: Type -> Type # Methods from :: PlacementConstraint -> Rep PlacementConstraint x # to :: Rep PlacementConstraint x -> PlacementConstraint #
NFData PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Methods rnf :: PlacementConstraint -> () #
Hashable PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Methods hashWithSalt :: Int -> PlacementConstraint -> Int # hash :: PlacementConstraint -> Int #
ToJSON PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Methods toJSON :: PlacementConstraint -> Value # toEncoding :: PlacementConstraint -> Encoding # toJSONList :: [PlacementConstraint] -> Value # toEncodingList :: [PlacementConstraint] -> Encoding #
FromJSON PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint Methods parseJSON :: Value -> Parser PlacementConstraint # parseJSONList :: Value -> Parser [PlacementConstraint] #
type Rep PlacementConstraint Source #
Instance details Defined in Amazonka.CloudWatchEvents.Types.PlacementConstraint type Rep PlacementConstraint = D1 ('MetaData "PlacementConstraint" "Amazonka.CloudWatchEvents.Types.PlacementConstraint" "libZSservicesZSamazonka-cloudwatch-eventsZSamazonka-cloudwatch-events" 'False) (C1 ('MetaCons "PlacementConstraint'" 'PrefixI 'True) (S1 ('MetaSel ('Just "expression") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe Text)) :*: S1 ('MetaSel ('Just "type'") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe PlacementConstraintType))))

newPlacementConstraint :: PlacementConstraint Source #

Create a value of PlacementConstraint with all optional fields omitted.

Use generic-lens or optics to modify other optional fields.

The following record fields are available, with the corresponding lenses provided for backwards compatibility:

$sel:expression:PlacementConstraint', placementConstraint_expression - A cluster query language expression to apply to the constraint. You cannot specify an expression if the constraint type is distinctInstance. To learn more, see Cluster Query Language in the Amazon Elastic Container Service Developer Guide.

$sel:type':PlacementConstraint', placementConstraint_type - The type of constraint. Use distinctInstance to ensure that each task in a particular group is running on a different container instance. Use memberOf to restrict the selection to a group of valid candidates.

placementConstraint_expression :: Lens' PlacementConstraint (Maybe Text) Source #

A cluster query language expression to apply to the constraint. You cannot specify an expression if the constraint type is distinctInstance. To learn more, see Cluster Query Language in the Amazon Elastic Container Service Developer Guide.

placementConstraint_type :: Lens' PlacementConstraint (Maybe PlacementConstraintType) Source #

The type of constraint. Use distinctInstance to ensure that each task in a particular group is running on a different container instance. Use memberOf to restrict the selection to a group of valid candidates.