See the project website for documentation and APIs.

Misk is a new open source application container from Cash App.

Misk is not ready for use. The API is not stable.

Our change log has release history. API is subject to change.

implementation("com.squareup.misk:misk:0.22.0")

Snapshot builds are available.

The core annotations and interfaces necessary to define actions that can be hosted in Misk. This package has no dependency on the enclosing container (Misk!) and so your actions can be used in other environments without any heavy dependencies.

Actions should extend WebAction, be annotated with a HTTP method like @Post, accept a request object and return a response object. Throw an exception like BadRequestException to fail the request without much boilerplate.

Integrate with Amazon Web Services, and includes packages to integrate with S3 and SQS.

Integrate with AWS DynamoDb using AWS SDK for Java 1.x. It should be safe to install side-by-side with misk-aws2-dynamodb if you need to use features in both.

Integrate with this package to write tests for code that interacts with DynamoDb. Exposes APIs via AWS SDK for Java 1.x. Use alongside with misk-aws-dynamodb.

Installing InProcessDynamoDbModule runs a DynamoDb Local instance in memory for your tests to run against. This module is recommended over DockerDynamoDbModule because there is less overhead in test execution performance.

Installing DockerDynamoDbModule runs a DynamoDB Local instance in Docker for your tests to execute against.

Integrate with AWS DynamoDb using AWS SDK for Java 2.x. It should be safe to install side-by-side with misk-aws-dynamodb if you need to use features in both.

Please read the AWS SDK for Java 2.x Migration Guide for more details.

Integrate with this package to write tests for code that interacts with DynamoDb. Exposes APIs via AWS SDK for Java 2.x. Use alongside with misk-aws2-dynamodb.

Installing InProcessDynamoDbModule runs a DynamoDb Local instance in memory for your tests to run against. This module is recommended over DockerDynamoDbModule because there is less overhead in test execution performance.

Installing DockerDynamoDbModule runs a DynamoDB Local instance in Docker for your tests to execute against.

Bind Guava services with inter-service dependencies.

Any service can depend on any other service. ServiceManager won't start a service until the services it depends on are running.

Integrates Guice with Kotlin.

Extending KAbstractModule instead of Guice's AbstractModule lets you use KClass instead of java.lang.Class and other conveniences.

Runtime feature flags. misk-launchdarkly is the reference implementation.

A job queue with a high quality fake. AwsSqsJobQueueModule from misk-aws is the reference implementation.

An event publisher + consumer. There is no open source reference implementation at this time.

Misk-Web powers the Misk Admin Dashboard with modular Typescript + React powered tabs.

Check out Misk-Web!

The wisp* modules contain no Dependency Injection based code (i.e. no Guice, etc). These modules should never refer to misk* modules, although misk* modules can (and should) use wisp* modules.

Also, modules that are wisp*-testing will only be used in test scope in other wisp modules, never in the api/implementation scope.

If you are refactoring code from misk into the wisp modules, you must not break any external Misk dependencies or apis. It is ok to deprecate items in misk to encourage eventual migration to wisp directly if desired. If your refactoring does not fit one of the existing wisp modules, create a new module. For now, it is preferred to have many small modules rather than larger conglomerate modules requiring many different dependencies.

It should be considered that wisp will be volatile for sometime with the potential for a lot of changes, additions, etc. Misk apps should use wisp modules directly with caution as breaking changes might be required.