Amazonka.AppSync.EvaluateMappingTemplate

Evaluates a given template and returns the response. The mapping template can be a request or response template.

Request templates take the incoming request after a GraphQL operation is parsed and convert it into a request configuration for the selected data source operation. Response templates interpret responses from the data source and map it to the shape of the GraphQL field output type.

Mapping templates are written in the Apache Velocity Template Language (VTL).

Creating a Request

data EvaluateMappingTemplate

See: newEvaluateMappingTemplate smart constructor.

Constructors

EvaluateMappingTemplate'

Fields

• template :: Text

  The mapping template; this can be a request or response template. A template is required for this action.

• context :: Text

  The map that holds all of the contextual information for your resolver invocation. A context is required for this action.

Instances

ToJSON EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

toJSON :: EvaluateMappingTemplate -> Value

toEncoding :: EvaluateMappingTemplate -> Encoding

toJSONList :: [EvaluateMappingTemplate] -> Value

toEncodingList :: [EvaluateMappingTemplate] -> Encoding

ToHeaders EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

toHeaders :: EvaluateMappingTemplate -> [Header]

ToPath EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

toPath :: EvaluateMappingTemplate -> ByteString

ToQuery EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

toQuery :: EvaluateMappingTemplate -> QueryString

AWSRequest EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Associated Types

type AWSResponse EvaluateMappingTemplate

Methods

request :: (Service -> Service) -> EvaluateMappingTemplate -> Request EvaluateMappingTemplate

response :: MonadResource m => (ByteStringLazy -> IO ByteStringLazy) -> Service -> Proxy EvaluateMappingTemplate -> ClientResponse ClientBody -> m (Either Error (ClientResponse (AWSResponse EvaluateMappingTemplate)))

Generic EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Associated Types

type Rep EvaluateMappingTemplate :: Type -> Type

Methods

from :: EvaluateMappingTemplate -> Rep EvaluateMappingTemplate x

to :: Rep EvaluateMappingTemplate x -> EvaluateMappingTemplate

Read EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

readsPrec :: Int -> ReadS EvaluateMappingTemplate

readList :: ReadS [EvaluateMappingTemplate]

readPrec :: ReadPrec EvaluateMappingTemplate

readListPrec :: ReadPrec [EvaluateMappingTemplate]

Show EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

showsPrec :: Int -> EvaluateMappingTemplate -> ShowS

show :: EvaluateMappingTemplate -> String

showList :: [EvaluateMappingTemplate] -> ShowS

NFData EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

rnf :: EvaluateMappingTemplate -> ()

Eq EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

(==) :: EvaluateMappingTemplate -> EvaluateMappingTemplate -> Bool

(/=) :: EvaluateMappingTemplate -> EvaluateMappingTemplate -> Bool

Hashable EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

hashWithSalt :: Int -> EvaluateMappingTemplate -> Int

hash :: EvaluateMappingTemplate -> Int

type AWSResponse EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

type AWSResponse EvaluateMappingTemplate = EvaluateMappingTemplateResponse

type Rep EvaluateMappingTemplate

Defined in Amazonka.AppSync.EvaluateMappingTemplate

type Rep EvaluateMappingTemplate = D1 ('MetaData "EvaluateMappingTemplate" "Amazonka.AppSync.EvaluateMappingTemplate" "amazonka-appsync-2.0-4Pb6UqteLv1I9NIWaj90bg" 'False) (C1 ('MetaCons "EvaluateMappingTemplate'" 'PrefixI 'True) (S1 ('MetaSel ('Just "template") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 Text) :*: S1 ('MetaSel ('Just "context") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 Text)))

newEvaluateMappingTemplate

Arguments

:: Text

$sel:template:EvaluateMappingTemplate'

-> Text

$sel:context:EvaluateMappingTemplate'

-> EvaluateMappingTemplate

Create a value of EvaluateMappingTemplate 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:template:EvaluateMappingTemplate', evaluateMappingTemplate_template - The mapping template; this can be a request or response template. A template is required for this action.

$sel:context:EvaluateMappingTemplate', evaluateMappingTemplate_context - The map that holds all of the contextual information for your resolver invocation. A context is required for this action.

Request Lenses

evaluateMappingTemplate_template :: Lens' EvaluateMappingTemplate Text

The mapping template; this can be a request or response template. A template is required for this action.

evaluateMappingTemplate_context :: Lens' EvaluateMappingTemplate Text

The map that holds all of the contextual information for your resolver invocation. A context is required for this action.

Destructuring the Response

data EvaluateMappingTemplateResponse

See: newEvaluateMappingTemplateResponse smart constructor.

Constructors

EvaluateMappingTemplateResponse'

Fields

• error :: Maybe ErrorDetail

  The ErrorDetail object.

• evaluationResult :: Maybe Text

  The mapping template; this can be a request or response template.

• logs :: Maybe [Text]

  A list of logs that were generated by calls to util.log.info and util.log.error in the evaluated code.

• httpStatus :: Int

  The response's http status code.

Instances

Generic EvaluateMappingTemplateResponse

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Associated Types

type Rep EvaluateMappingTemplateResponse :: Type -> Type

Methods

from :: EvaluateMappingTemplateResponse -> Rep EvaluateMappingTemplateResponse x

to :: Rep EvaluateMappingTemplateResponse x -> EvaluateMappingTemplateResponse

Read EvaluateMappingTemplateResponse

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

readsPrec :: Int -> ReadS EvaluateMappingTemplateResponse

readList :: ReadS [EvaluateMappingTemplateResponse]

readPrec :: ReadPrec EvaluateMappingTemplateResponse

readListPrec :: ReadPrec [EvaluateMappingTemplateResponse]

Show EvaluateMappingTemplateResponse

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

showsPrec :: Int -> EvaluateMappingTemplateResponse -> ShowS

show :: EvaluateMappingTemplateResponse -> String

showList :: [EvaluateMappingTemplateResponse] -> ShowS

NFData EvaluateMappingTemplateResponse

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

rnf :: EvaluateMappingTemplateResponse -> ()

Eq EvaluateMappingTemplateResponse

Defined in Amazonka.AppSync.EvaluateMappingTemplate

Methods

(==) :: EvaluateMappingTemplateResponse -> EvaluateMappingTemplateResponse -> Bool

(/=) :: EvaluateMappingTemplateResponse -> EvaluateMappingTemplateResponse -> Bool

type Rep EvaluateMappingTemplateResponse

Defined in Amazonka.AppSync.EvaluateMappingTemplate

type Rep EvaluateMappingTemplateResponse = D1 ('MetaData "EvaluateMappingTemplateResponse" "Amazonka.AppSync.EvaluateMappingTemplate" "amazonka-appsync-2.0-4Pb6UqteLv1I9NIWaj90bg" 'False) (C1 ('MetaCons "EvaluateMappingTemplateResponse'" 'PrefixI 'True) ((S1 ('MetaSel ('Just "error") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe ErrorDetail)) :*: S1 ('MetaSel ('Just "evaluationResult") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe Text))) :*: (S1 ('MetaSel ('Just "logs") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe [Text])) :*: S1 ('MetaSel ('Just "httpStatus") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 Int))))

newEvaluateMappingTemplateResponse

Arguments

:: Int

$sel:httpStatus:EvaluateMappingTemplateResponse'

-> EvaluateMappingTemplateResponse

Create a value of EvaluateMappingTemplateResponse 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:error:EvaluateMappingTemplateResponse', evaluateMappingTemplateResponse_error - The ErrorDetail object.

$sel:evaluationResult:EvaluateMappingTemplateResponse', evaluateMappingTemplateResponse_evaluationResult - The mapping template; this can be a request or response template.

$sel:logs:EvaluateMappingTemplateResponse', evaluateMappingTemplateResponse_logs - A list of logs that were generated by calls to util.log.info and util.log.error in the evaluated code.

$sel:httpStatus:EvaluateMappingTemplateResponse', evaluateMappingTemplateResponse_httpStatus - The response's http status code.

Response Lenses

evaluateMappingTemplateResponse_error :: Lens' EvaluateMappingTemplateResponse (Maybe ErrorDetail)

The ErrorDetail object.

evaluateMappingTemplateResponse_evaluationResult :: Lens' EvaluateMappingTemplateResponse (Maybe Text)

The mapping template; this can be a request or response template.

evaluateMappingTemplateResponse_logs :: Lens' EvaluateMappingTemplateResponse (Maybe [Text])

A list of logs that were generated by calls to util.log.info and util.log.error in the evaluated code.

evaluateMappingTemplateResponse_httpStatus :: Lens' EvaluateMappingTemplateResponse Int

The response's http status code.