dnvriend / sbt-sam   1.0.30

Apache License 2.0 GitHub

Plugin and library to create enterprise-cloud applications leveraging SBT and the SAM component model

Scala versions: 2.12

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Supported features

sbt-sam supports the following:

  • AWS Lambda with AWS API gateway with optionally Cognito UserPool or Sigv4 (IAM) Authentication,
  • AWS Lambda Scheduled events support,
  • AWS Lambda CloudWatch events support,
  • AWS Lambda S3 Events support,
  • AWS Lambda Kinesis support,
  • AWS Lambda SNS support,
  • AWS Relational Database Service (RDS) support,
  • AWS DynamoDB support,
  • AWS SNS support,
  • AWS Kinesis support,
  • AWS S3 support,
  • Jenkins/AWS CodeBuild support,
  • Scala 2.12 support,
  • sbt 1.1.0 support,
  • sbt compile/test/package, dependency management & packaging/publishing,
  • uses AWS CloudFormation extensively to create/update a component,


sbt-sam comes in the form of an sbt-plugin and libraries, and is published to Bintray jcenter so you should edit at least two files. The latest version is Download

Installation of the libraries: Add the following to your build.sbt file:

libraryDependencies += "com.github.dnvriend" %% "sam-annotations" % "put-latest-version-here"
libraryDependencies += "com.github.dnvriend" %% "sam-lambda" % "put-latest-version-here"

Installation of the sbt-plugin: Add the following to your project/plugins.sbt file:

addSbtPlugin("com.github.dnvriend" % "sbt-sam-plugin" % "put-latest-version-here")

resolvers += Resolver.url("bintray-dnvriend-ivy-sbt-plugins", url("http://dl.bintray.com/dnvriend/sbt-plugins"))(Resolver.ivyStylePatterns)
resolvers += Resolver.bintrayRepo("dnvriend", "maven") 

sbt-sam seed projects

The following seed projects are available:

Mini Data and Analytics Platform

sbt-sam test projects

  • sam-encryption-test: A small study project on AWS encryption using AWS KMS, AWS Lambda and sbt-sam.

Available tasks

The following tasks are available:


The task samInfo shows the current state of the component. In future versions, the task will also show the differences between the component as defined by the project, and the current projection of the component in AWS:

When there is no projection:

> samInfo
[info] ====================
[info] Stack State:
[info] ====================
[info] Stack 'sam-dynamodb-streams-seed-dendev' is not yet deployed
[info] Lambdas:
[info] Api Http Event Handlers:
[info] * GetPerson: not yet deployed
[info] * PostPerson: not yet deployed
[info] * GetPersonIds: not yet deployed
[info] * GetListOfPerson: not yet deployed
[info] DynamoDB Streams Handlers:
[info] No DynamoDB event handlers configured
[info] Scheduled Event Handlers:
[info] No scheduled event handlers configured
[info] Kinesis Event Handlers:
[info] No kinesis event handlers configured
[info] SNS Event Handlers:
[info] No SNS event handlers configured
[info] DynamoDbTables:
[info] * people_ids: not yet deployed
[info] * people: not yet deployed
[info] SNS Topics:
[info] No topics configured
[info] Kinesis Streams:
[info] No streams configured
[info] Endpoints:
[info] No service endpoint found
[success] Total time: 15 s, completed Dec 25, 2017 9:50:04 AM

When there is a projection:

> samInfo
[info] ====================
[info] Stack State:
[info] ====================
[info] Name: sam-dynamodb-streams-seed-dendev
[info] Description: No description
[info] Status: UPDATE_COMPLETE
[info] Status reason: No status reason
[info] Last updated: Mon Dec 25 09:51:15 CET 2017
[info] ServiceEndpoint: https://83s0mdgwve.execute-api.eu-west-1.amazonaws.com/dendev
[info] Lambdas:
[info] Api Http Event Handlers:
[info] * PostPerson:
[info]   - Arn: arn:aws:lambda:eu-west-1:123456789:function:sam-dynamodb-streams-seed-dendev-PostPerson-1MHJFKIRG9R3E
[info]   - Role: arn:aws:iam::123456789:role/sam-dynamodb-streams-seed-dendev-PostPersonRole-O3MLQ6A02WK1
[info]   - Handler: com.github.dnvriend.PostPerson::handleRequest
[info]   - size: 52396083
[info]   - timeout: 300
[info]   - memory: 1024
[info]   - tracing: Active
[info]   - lastmodified: 2017-12-25T08:51:44.641+0000
[info] * GetPerson:
[info]   - Arn: arn:aws:lambda:eu-west-1:123456789:function:sam-dynamodb-streams-seed-dendev-GetPersonIds-1UFSUY7OHO88E
[info]   - Role: arn:aws:iam::123456789:role/sam-dynamodb-streams-seed-dendev-GetPersonIdsRole-1PNBZRCMTUJGU
[info]   - Handler: com.github.dnvriend.GetPersonIds::handleRequest
[info]   - size: 52396083
[info]   - timeout: 300
[info]   - memory: 1024
[info]   - tracing: Active
[info]   - lastmodified: 2017-12-25T08:51:36.510+0000
[info] DynamoDB Streams Handlers:
[info] No DynamoDB event handlers configured
[info] Scheduled Event Handlers:
[info] No scheduled event handlers configured
[info] Kinesis Event Handlers:
[info] No kinesis event handlers configured
[info] SNS Event Handlers:
[info] No SNS event handlers configured
[info] DynamoDbTables:
[info] * people:
[info]   - TableName: sam-dynamodb-streams-seed-dendev-people
[info]   - TableId: 69fc4efe-ebe6-4094-90a8-af014ecf5737
[info]   - TableArn: arn:aws:dynamodb:eu-west-1:123456789:table/sam-dynamodb-streams-seed-dendev-people
[info]   - Table status: ACTIVE
[info]   - Number of items: 0
[info]   - TableSizeBytes: 0
[info]   - TableCreation: Mon Dec 25 09:51:19 CET 2017
[info]   - ProvisionedThroughput: {NumberOfDecreasesToday: 0,ReadCapacityUnits: 1,WriteCapacityUnits: 1}
[info]   - KeySchema: [{AttributeName: id,KeyType: HASH}]
[info]   - Attribute Definitions: [{AttributeName: id,AttributeType: S}]
[info]   - Local Secondary Indexes: null
[info]   - Global Secondary Indexes: null
[info]   - StreamArn: arn:aws:dynamodb:eu-west-1:123456789:table/sam-dynamodb-streams-seed-dendev-people/stream/2017-12-25T08:51:19.399
[info]   - StreamLabel: 2017-12-25T08:51:19.399
[info]   - Restore Summary: null
[info] SNS Topics:
[info] No topics configured
[info] Kinesis Streams:
[info] No streams configured
[info] Endpoints:
[info] GET - https://83s0mdgwve.execute-api.eu-west-1.amazonaws.com/dendev/person
[info] POST - https://83s0mdgwve.execute-api.eu-west-1.amazonaws.com/dendev/person
[info] GET - https://83s0mdgwve.execute-api.eu-west-1.amazonaws.com/dendev/person/{id}
[info] GET - https://83s0mdgwve.execute-api.eu-west-1.amazonaws.com/dendev/personids
[success] Total time: 1 s, completed Dec 25, 2017 9:52:35 AM


The task samDeploy deploys/installs the component to AWS. The samDeploy task is also used to update a component. The samDeploy task uses a combination of CloudFormation and the AWS Java SDK in order to control and report about the deployment process and to let sbt-sam get information about the current component and AWS projection:

> samDeploy
[info] Creating cloud formation stack
[info] CREATE_IN_PROGRESS - AWS::S3::Bucket - SbtSamDeploymentBucket - CREATE_IN_PROGRESS -
[info] CREATE_IN_PROGRESS - AWS::S3::Bucket - SbtSamDeploymentBucket - CREATE_IN_PROGRESS - Resource creation Initiated
[info] CREATE_IN_PROGRESS - AWS::S3::Bucket - SbtSamDeploymentBucket - CREATE_COMPLETE -
[info] CREATE_COMPLETE - AWS::CloudFormation::Stack - sam-seed-hello - CREATE_COMPLETE -
[==================================================]   100%   Lambda JAR -> S3S3
[info] Updating cloud formation stack
[info] Change set status: CREATE_PENDING - execution status: UNAVAILABLE -
[info] Change set status: CREATE_COMPLETE - execution status: AVAILABLE -
[info] Executing change set: 'sam-change-set6e6d5a3b-da00-4bbe-a2b3-46417e0c0ec2'
[info] UPDATE_IN_PROGRESS - AWS::IAM::Role - HelloLambdaRole - CREATE_IN_PROGRESS - Resource creation Initiated
[info] UPDATE_IN_PROGRESS - AWS::IAM::Role - HelloLambdaRole - CREATE_COMPLETE -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Function - HelloLambda - CREATE_IN_PROGRESS -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Function - HelloLambda - CREATE_IN_PROGRESS - Resource creation Initiated
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Function - HelloLambda - CREATE_COMPLETE -
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::RestApi - ServerlessRestApi - CREATE_IN_PROGRESS -
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::RestApi - ServerlessRestApi - CREATE_IN_PROGRESS - Resource creation Initiated
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::RestApi - ServerlessRestApi - CREATE_COMPLETE -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionTest - CREATE_IN_PROGRESS - Resource creation Initiated
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::Deployment - ServerlessRestApiDeploymentad309a696b - CREATE_IN_PROGRESS -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionhello - CREATE_IN_PROGRESS -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionTest - CREATE_IN_PROGRESS -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionhello - CREATE_IN_PROGRESS - Resource creation Initiated
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::Deployment - ServerlessRestApiDeploymentad309a696b - CREATE_IN_PROGRESS - Resource creation Initiated
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::Deployment - ServerlessRestApiDeploymentad309a696b - CREATE_COMPLETE -
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::Stage - ServerlessRestApihelloStage - CREATE_IN_PROGRESS -
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::Stage - ServerlessRestApihelloStage - CREATE_IN_PROGRESS - Resource creation Initiated
[info] UPDATE_IN_PROGRESS - AWS::ApiGateway::Stage - ServerlessRestApihelloStage - CREATE_COMPLETE -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionTest - CREATE_COMPLETE -
[info] UPDATE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionhello - CREATE_COMPLETE -
[success] Total time: 89 s, completed Dec 24, 2017 1:42:25 PM


The task samRemove removes the component from AWS. It deletes all artifacts uploaded to S3 and removes SNS topics, Tables, and the deployment S3 bucket:

> samRemove
Deleting artifact version: '5fgiHbqR5Xl2_MUm3RlLC1SXFI7yQkRY'
[info] Deleting cloud formation stack
[info] DELETE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionTest - DELETE_IN_PROGRESS -
[info] DELETE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionhello - DELETE_IN_PROGRESS -
[info] DELETE_IN_PROGRESS - AWS::ApiGateway::Stage - ServerlessRestApihelloStage - DELETE_IN_PROGRESS -
[info] DELETE_IN_PROGRESS - AWS::S3::Bucket - SbtSamDeploymentBucket - DELETE_IN_PROGRESS -
[info] DELETE_IN_PROGRESS - AWS::ApiGateway::Stage - ServerlessRestApihelloStage - DELETE_COMPLETE -
[info] DELETE_IN_PROGRESS - AWS::S3::Bucket - SbtSamDeploymentBucket - DELETE_COMPLETE -
[info] DELETE_IN_PROGRESS - AWS::ApiGateway::Deployment - ServerlessRestApiDeploymentad309a696b - DELETE_IN_PROGRESS -
[info] DELETE_IN_PROGRESS - AWS::ApiGateway::Deployment - ServerlessRestApiDeploymentad309a696b - DELETE_COMPLETE -
[info] DELETE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionhello - DELETE_COMPLETE -
[info] DELETE_IN_PROGRESS - AWS::Lambda::Permission - HelloLambdaHelloLambdaPermissionTest - DELETE_COMPLETE -
[info] DELETE_IN_PROGRESS - AWS::ApiGateway::RestApi - ServerlessRestApi - DELETE_IN_PROGRESS -
[info] DELETE_IN_PROGRESS - AWS::ApiGateway::RestApi - ServerlessRestApi - DELETE_COMPLETE -
[info] DELETE_IN_PROGRESS - AWS::Lambda::Function - HelloLambda - DELETE_IN_PROGRESS -
[info] DELETE_IN_PROGRESS - AWS::Lambda::Function - HelloLambda - DELETE_COMPLETE -
[info] DELETE_IN_PROGRESS - AWS::IAM::Role - HelloLambdaRole - DELETE_COMPLETE -
[success] Total time: 22 s, completed Dec 24, 2017 1:43:48 PM


The task samLogs shows the last log output for a selected lambda:

> samLogs CreatePerson
[info] 2017-12-25T19:17:00.125 - REPORT RequestId: cc92212d-e99f-11e7-822c-0310ed4e4ed5	Duration: 164.65 ms	Billed Duration: 200 ms 	Memory Size: 1024 MB	Max Memory Used: 151 MB
[info] 2017-12-25T19:17:00.125 - END RequestId: cc92212d-e99f-11e7-822c-0310ed4e4ed5
[info] 2017-12-25T19:17:00.124 - {}
[info] 2017-12-25T19:16:59.958 - START RequestId: cc92212d-e99f-11e7-822c-0310ed4e4ed5 Version: $LATEST
[info] 2017-12-25T19:16:58.344 - REPORT RequestId: c6f81bf6-e99f-11e7-857b-91f7f814692c	Duration: 6097.46 ms	Billed Duration: 6100 ms 	Memory Size: 1024 MB	Max Memory Used: 151 MB
[info] 2017-12-25T19:16:58.344 - END RequestId: c6f81bf6-e99f-11e7-857b-91f7f814692c
[info] 2017-12-25T19:16:58.241 - {}
[info] 2017-12-25T19:16:52.246 - START RequestId: c6f81bf6-e99f-11e7-857b-91f7f814692c Version: $LATEST
[success] Total time: 1 s, completed Dec 25, 2017 7:20:17 PM

Stage Configuration

sbt-sam can be configured to be used when deploying applications by means of Jenkins. sbt-sam looks at environment variables for configuration. The most important one is the environment variable SAM_STAGE, when if set, overrules the samStage setting in build.sbt. When Jenkins sets the SAM_STAGE variable to 'test', then the stage will be test and the naming of the components will become scoped with 'test'. The SAM_STAGE variable content has no special meaning for sbt-sam, other than grouping components together.

AWS Configuration

The standard resolution for AWS credentials is:

  • Environment Variables,
  • Java System Properties,
  • The AWS credentials file,
  • The AWS shared config file,
  • Container credentials,
  • Instance profile credentials

The following environment variables can be set in the environment eg. build server to set the profile, region and api keys to use:

  • AWS_PROFILE - The aws profile to use
  • AWS_ACCESS_KEY_ID - the aws access key to use
  • AWS_SECRET_ACCESS_KEY - the aws secret access key to use
  • AWS_REGION - the aws region to use

The following Java System Properties can be set:

  • aws.accessKeyId - the aws access key to use
  • aws.secretKey - the aws secret access key to use
  • aws.region - the aws region to use

The 'default credential profiles' file:

  • ~/.aws/credentials
  • Place your credentials (API keys here)
  • aws_access_key_id
  • aws_secret_access_key
  • the file can be set with higher restrictions
  • AWS clients will only read credential keys here

The 'default cli config' file:

  • ~/.aws/config
  • Place to put credentials and other things
  • Don't put credentials here, but you could
  • Supported settings are:
  • aws_access_key_id: AWS access key
  • aws_secret_access_key: AWS secret key
  • aws_session_token: AWS session token. A session token is only required if you are using temporary security credentials.
  • region: the aws region to use by the client
  • output: output format (json, text, or table)




1.0.30 (2018-05-04)

  • Support for launching ECS jobs using the com.github.dnvriend.ecs.ECS service, combine it with AWS Fargate to run compute jobs that cannot run on Lambda because of resource or library constraints.

1.0.29 (2018-04-16)

  • Support for Java-based lambdas that implement com.amazonaws.services.lambda.runtime.RequestStreamHandler.
  • Support for the AWS Secret Manager with com.github.dnvriend.secrets.SecretsManager.

1.0.28 (2018-03-30)

  • Support for generic lambdas by using the GenericHandler trait and annotating it with a @GenericConf configuration. Generic Lambdas are lambdas that are not subscribed to a specific event generator like eg. Kinesis or DynamoDB streams, but must be deployed to AWS and can be invoked by sending a message to the ARN of the lambda like eg. by means of AWS RDS Aurora for MySQL,
  • Added support for Lambda ReservedConcurrentExecutions by means of configuration annotations,
  • Added ComprehendFullAccess managed policy annotation, to allow a lambda access to AWS Comprehend where applicable, eg. to do sentiment analysis on English text.

1.0.27 (2018-03-02)

  • SAM generates an AWS::ApiGateway::Stage resource with a name where the samStage was part of the encoded resource name. This name was the result of applying the Serverless Transform. To export the base url of the Api gateway, sbt-sam looked up the name with the encoded stage. The new behavior of CloudFormation is to encode the stage Prod in the name, so sbt-sam now looks for this stage and exports that url to other components.

1.0.26 (2018-02-22)

  • Removing check if bucket exists as it conflicts with the workflow

1.0.25 (2018-02-21)

  • Merged #99 Encryption at rest for DynamoDB tables
  • Merged #100 Encryption at rest for Kinesis Streams
  • Merged #101 naming scheme change for resources; this is a breaking change as the resource naming scheme has changed from projectName-stage-resourceName stage-projectName-resourceName.

1.0.24 (2018-02-19)

1.0.23 (2018-02-12)

  • Change iamGetUser in AWS plugin from settingKey to taskKey

1.0.22 (2018-02-07)

  • Support Signature Version 4 (sigv4) authentication method for HttpHandlers (Lambdas).
  • Added authorizer.type to sam.conf to set the authorizer type, valid values are sigv4 and cognito.

1.0.21 (2018-02-07)

  • Merged PR #93 'Added the possibility to add custom environment varibles via Lightbend config', thanks Martijn van de Grift!
  • Merged PR #94 'Fixed an issue where env variables were not recognized', thanks Martijn van de Grift!

1.0.20 (2018-02-02)

  • Merged PR #89 'RDS & Lamda VPC Support', thanks Martijn van de Grift!
  • Changed the deployment bucket name from 'organizationName-projectName-stage' -> 'organizationName-stage-projectName', please note that this update is a breaking change, as sbt-sam looks for the new deployment bucket name to remove all artifacts,
  • added dnvriend/sam-rds-vpc-seed.g8 seed project,

1.0.19 (2018-01-17)

1.0.18 (2018-01-13)

  • Support for S3 Event Sources, see dnvriend/sam-s3-seed.g8 for examples, thanks Martijn van de Grift!
  • Support for com.github.dnvriend.sam.akka.stream.KinesisEventProcessor, an akka streams event processor for Kinesis streams to create a 'FromStream map ToStream' style processor using akka stream declarations,
  • Support for com.github.dnvriend.sam.akka.stream.KinesisEventHandler, an akka stream based Kinesis Event Handler
  • Support for com.github.dnvriend.kinesis.KinesisProducer, a KinesisProducer component to produce messages to Kinesis.
  • Support for com.github.dnvriend.sns.TopicProducer, an SNS TopicProducer component to produce messages to SNS.
  • Support for com.github.dnvriend.s3.GetS3Object, for getting access to the data stored in S3 objects.
  • Added the AmazonS3FullAccess role to lambdas with no policy (role) annotations.

1.0.17 (2018-01-11)

1.0.16 (2018-01-08)

  • Release error due to bintray errors
  • Configurable managed policies on lambdas by setting annotations; no annotations means default full policies
  • Support for importing dynamodb tables with 'import' syntax.
  • General bug fixing

1.0.15 (2018-01-08)

  • Not Released due to bintray errors

1.0.14 (2018-01-08)

  • Not Released due to bintray errors

1.0.13 (2018-01-06)

  • Support for 'com.github.dnvriend.service.Aggregate', a DynamoDB backed event sourced service that provides support for working with aggregates of any kind, leveraging a State Monad for sequencing aggregate events and computing a final aggregate state. Events are stored in the event store as polymorphic JSON events. For more information take a look at dnvriend/sam-microservice-seed.g8.

1.0.12 (2018-01-06)

  • Support for 'DynamoDBJsonWithRangeKeyRepository'
  • General bug fixing

1.0.11 (2018-01-05)

  • Import of user pools
  • General bug fixing

1.0.10 (2018-01-04)

  • Support for Kinesis Extended S3 Firehose
  • Support for creating data-segments, an element of a data lake leveraging Kappa Architecture

1.0.9 (2018-01-02)

  • Merged PR #6: Support for creating & authorizing Cognito User Pool Users, thanks Kevin Kessels!

1.0.8 (2018-01-01)

  • Support for creating IAM Roles

1.0.7 (2017-12-31)

1.0.6 (2017-12-27)

  • Support for AWS Encryption SDK
  • Two new ApiGatewayHandlers: JsonApiGatewayHandler and JsonDApiGatewayHandler
  • Fix for samDeploy that resolved to incorrect cloudformation-create-update flow
  • HttpHandlers show handlerName and httpMethod and httpPath when calling samInfo

1.0.5 (2017-12-26)

  • Fix for samLogs
    • resolving the correct logGroup and logStream for the function,
    • showing the logs in ascending order, for use with sbt console logging

1.0.4 (2017-12-25)

  • Support for logging lambda log output with samLogs
  • Two new repositories: BinaryRepository and JsonRepository
  • Two new ApiGatewayHandlers: BinaryDynamoRepoApiGatewayHandler and JsonDynamoRepoApiGatewayHandler

1.0.3 (2017-12-25)

  • Support for Kinesis Resources
  • Support for Kinesis Events

1.0.2 (2017-12-24)

  • Fix for resolving scoped DynamoDB table names

1.0.1 (2017-12-24)

  • Support for (public/unsecure) API Gateway
  • Support for DynamoDB Table Resources
  • Support for DynamoDB Streams Events
  • Support for SNS Resources
  • Support for SNS Events
  • Support for Scheduled Events

1.0.0 (2017-12-20)

  • Initial release at Bintray jcenter