sls-helper-plugin-janis

Serverless Helper Plugin JANIS

A plugin for JANIS Commerce to use with the Serverless Helper Framework.

Helpers

base

Used to implement a base service with minimal setup

Option	Type	Description	Attributes	Default value
serviceCode	string	The service name in lowercase dash separated	Required
servicePort	number	The service port	Required
apiSecrets	Object	A mapping of stages to Service API Secret		undefined

Some properties of the initial configuration have a new special meaning:

package.include and package.includeOnly

package.exclude and package.excludeOnly

package.plugins and package.pluginsOnly

This properties (if present in the initial service configuration) have the following behavior:

• package.include, package.exclude and plugins will be appended to the hooks defaults
• package.includeOnly, package.excludeOnly and pluginsOnly will replace entirely the hooks defaults

Trace Lambda Layer

If the env vars TRACE_ACCOUNT_ID and JANIS_TRACE_EXTENSION_VERSION are set, the Trace Lambda Layer will be set for every function by default.

apiGet and apiList are the only functions that have this behaviour changed by default.

To disable the layer, see the skipTraceLayer property in other helpers.

templates

Used to implement Lambda APIs requests and response templates as custom props

No options

authorizers

Used to implement APIs authorizers as custom props

Option	Type	Description	Attributes	Default value
accountId	string	Indicates the AWS account ID where the authorizers are deployed	Required

cors

Used to implement APIs CORS configuration as custom props

If options is undefined or set to true it will use the default CORS config for every property. You can also customize or override every property:

Option	Type	Description	Default value
replace	boolean	Indicates whether it should replace the CORS properties or merge then with the default	false
origins	array<string>	An array of allowed origins	['*']
headers	array<string>	An array of allowed headers	See below
allowCredentials	boolean	Indicates whether the credentials header should be set	true
maxAge	number	The time in seconds thar CORS headers should be cached	600

CORS Default headers:

[
	'authorization',
	'content-type',
	'janis-api-key',
	'janis-api-secret',
	'janis-client',
	'janis-service',
	'janis-entity',
	'x-api-key',
	'x-janis-page',
	'x-janis-page-size'
]

api

Used to implement a custom API

Option	Type	Description	Attributes	Default value
path	string	The API path	Required
method	string	The API HTTP Method		'get'
methodName	string	The JANIS API Method	Enum<list, get, post, put, patch, delete>	Defaults to same value of method option
handler	string	The lambda handler path and function		'src/lambda/RestApi/index.handler'
caching	boolean	Set to true to enable cache		false
cors	boolean	object	Set to true to enable services default CORS, or configure as an object as explained in CORS to customize the API CORS
queryParameters	object	A key value to map query string parameters to a boolean indicating if it's required or not
requestTemplates	object	A key value to map content types to request mapping headers. By default only application/json is enabled (Docs)
requestHeaders	object	A key value to map headers to a boolean indicating if it's required or not
authorizer	string	The name of the authorizer
timeout	number	The function timeout in seconds
package.include	array[string]	The List of paths of files to include
skipTraceLayer	boolean	Set to true if the API should not use the Trace Lambda Layer		false
functionRawProps	object	Custom properties to set in the function configuration
eventRawProps	object	Custom properties to set in the event configuration

apiList, apiGet, apiPost and apiPut

Used to implement JANIS CRUD APIs.

Option	Type	Description	Attributes	Default value
entityName	string	The entity name	Required
handler	string	The lambda handler path and function		'src/lambda/RestApi/index.handler'
path	string	The API path		/[entity-name] (for apiList and apiPost) or /[entity-name]/{id} (for apiGet and apiPut)
caching	boolean	Set to true to enable cache		false
cors	boolean	object	Set to true to enable services default CORS, or configure as an object as explained in CORS to customize the API CORS
queryParameters	object	A key value to map query string parameters to a boolean indicating if it's required or not
requestTemplates	object	A key value to map content types to request mapping headers. By default only application/json is enabled (Docs)
requestHeaders	object	A key value to map headers to a boolean indicating if it's required or not
authorizer	string	The name of the authorizer
timeout	number	The function timeout in seconds
package.include	array[string]	The List of paths of files to include
skipTraceLayer	boolean	Set to true if the API should not use the Trace Lambda Layer		false for post and put APIs, true for get and list APIs
functionRawProps	object	Custom properties to set in the function configuration
eventRawProps	object	Custom properties to set in the event configuration

eventListener

Used to implement JANIS Events listeners

Option	Type	Description	Attributes	Default value
serviceName	string	The service name	Required
entityName	string	The entity name	Required
eventName	string	The event name	Required
mustHaveClient	boolean	Indicates if authorizer must validate that client or not		false
listenersDirName	string	Indicates the path where the event listener files are placed		'event-listeners'
authorizer	string	The name of the authorizer		If not set, it defaults to ServiceAuthorizer or ServiceNoClientAuthorizer based on the value of mustHaveClient
package.include	array[string]	The List of paths of files to include
timeout	number	The function timeout in seconds

dbConfig

(since 3.1.0)

Used to implement JANIS Database config as secret with an auto-generated password

Option	Type	Description	Attributes	Default value
secret	string | object	The secret content as an object or a JSON stringified object	Required
secretName	string	The secret name		'janis/${self:custom.serviceCode}/${self:custom.stage}/db-config'
description	string	The secret description		'Database config secret for janis ${self:custom.serviceCode} ${self:custom.stage}'
passwordKey	string	The property name where the password will be generated		'password'
passwordLength	number	The generated password length		40

stateMachine

(since 4.3.0)

Used to implement AWS State Machines

Option	Type	Description	Attributes	Default value
name	string	The name of the state machine	Required
definition	object	The definition of the state machine. See more Step Functions	Required

It will automatically include the serverless-step-functions plugin.

It also defines 2 properties in the custom namespace:

• custom.machines.{MachineName}.arn: The State Machine ARN
• custom.machines.{MachineName}.name: The State Machine Name

Important: The {MachineName} in the custom.machines path will replaced be the name property converted to PascalCase. For example, if the following hook is configured

['janis.stateMachine', {
	name: 'my-super-machine',
	definition: myDefinition
}]

The following custom props will be set: custom.machines.MySuperMachine.arn and custom.machines.MySuperMachine.name

Examples

Basic Service with one CRUD operation set and an event listener

// serverless.js

'use strict';

const { helper } = require('sls-helper'); // eslint-disable-line

module.exports = helper({
	hooks: [

		['janis.base', {
			serviceCode: 'my-service',
			servicePort: 5000,
			apiSecrets: {
				beta: 'foo',
				qa: 'bar',
				prod: 'baz'
			}
		}],

		'janis.templates',

		['janis.authorizers', {
			accountId: '012345678910'
		}],

		'janis.cors',

		['janis.api', {
			path: '/hello-world',
			authorizer: 'NoClientAuthorizer',
			cors: true
		}],

		['janis.apiList', {
			entityName: 'product',
			authorizer: 'FullAuthorizer',
			cors: true
		}],

		['janis.apiGet', {
			entityName: 'product',
			authorizer: 'FullAuthorizer',
			cors: true
		}]

		['janis.apiPost', {
			entityName: 'product',
			authorizer: 'FullAuthorizer',
			cors: true
		}],

		['janis.apiPut', {
			entityName: 'product',
			authorizer: 'FullAuthorizer',
			cors: true
		}],

		['janis.apiList', {
			entityName: 'otherEntity',
			authorizer: 'FullAuthorizer',
			cors: {
				origins: ['*'], // Open to every origin
				allowCredentials: false
			}
		}],

		['janis.eventListener', {
			serviceName: 'catalog',
			entityName: 'product',
			eventName: 'created',
			mustHaveClient: true
		}],

		['janis.stateMachine', {
			name: 'StateMachineName',
			definition: {
				Comment: 'State Machine Comment',
				StartAt: 'WaitForCall',
				States: {
					WaitForCall: {
						Type: 'Wait',
						SecondsPath: '$.body.wait',
						Next: 'Finish'
					}
				}
			}
		}]

	]
}, {});

Changelog

[5.9.0] - 2022-11-16

Added

• Added support for the skipTraceLayer in APIs and set it as default in read APIs
• Docs for Trace Lambda Layer

Fixed

• Dependencies updated to fix vulnerabilities