Data Model

HL Request Handler

Handler<HLEvent, HLContext> => HLResponse 

Basic handler

(defn BasicHandler
  [{:keys [event ctx]}]
  {:statusCode 200
   :headers {"content-type" "application/json"}
   :body {:hello "world"})

Runtime/Backend initialization

(h/entrypoint [#'BasicHandler] opts)

HLContext

Map of

Keyword	Value Type	Description
:getRemainingTimeInMs	(fn [] remaining-time)	Gets remaining time of Lambda execution
:fnName	string	Name of the function
:fnVersion	string	Function version
:fnInvokedArn	string	ARN of the function
:memoryLimitInMb	string	Limit of the function memory
:awsRequestId	string	Id of the request (useful as a correlation id
:logGroupName	string	Log group name
:logStreamName	string	Log stream name
:identity	Option<CognitoIdentity>	Information about the Amazon Cognito identity that authorized the request
:clientContext	ClientContext	(mobile apps) Client context that's provided to Lambda by the client application

CognitoIdentity

Map of

Keyword	Value Type	Description
:cognitoIdentityId	string	The authenticated Amazon Cognito identity
:cognitoIdentityPoolId	string	The Amazon Cognito identity pool that authorized the invocation

ClientContext

Map of

Keyword	Value Type	Description
:installation_id	string	Application installation ID
:app_title	string	App title
:app_version_name	string	App version name
:app_version_code	string	App version code
:app_package_name	string	App package name
:env.platform	string	Platfom
:env.platform_version	string	Platform version
:env.make	string	?
:env.model	string	?
:env.locale	string	?
:Custom	string	Custom properties that can be set by the application

HLEvent

Depends on the event provider. Every service integrated with AWS Lambda may produce different shape of the event.

HLResponse

1. nil (indicates the ACK in SQS) OR

2. Map

   Map of

   Keyword	Value Type
   :statusCode	int
   :headers	ClojureMap<string,string>
   :multiValueHeaders	ClojureMap<string,vector<string>
   :body	string\|nil\|boolean\|vector<any>\|list<any>
   :isBase64Encoded	boolean

OR

3. ByteArray OR

   Stringified Map (2) converted to ByteArray.

4. Future<Map|String|ByteArray|nil> OR

   Composite type of Future + primitive.

5. ClojurePromise<Map|String|ByteArray|nil> OR

   Composite type of ClojurePromise + primitive.

6. Channel<Map|String|ByteArray|nil (only with async-retriever)

   Composite type of Channel + primitive.