Amazonite AWS SDK

Amazonite is an unofficial AWS SDK for Crystal.

Usage

Here's an example that creates a table in DynamoDB:

require "amazonite/dynamodb_v2"

private alias DB = Amazonite::DynamoDBV2

model = DB::CreateTableInput.new(
  [
    DB::AttributeDefinition.new("Artist", DB::ScalarAttributeType::S),
    DB::AttributeDefinition.new("SongTitle", DB::ScalarAttributeType::S)
  ],
  "Music",
  [
    DB::KeySchemaElement.new("Artist", DB::KeyType::Hash),
    DB::KeySchemaElement.new("SongTitle", DB::KeyType::Range)
  ],
  provisioned_throughput: DB::ProvisionedThroughput.new(10, 5),
)

client = DB::Client.new # read credentials from environment variables
response = client.create_table(model)

puts response.http.status_code # 200
result = response.result
puts result.table_description.try &.table_name # Music
puts result.table_description.try &.attribute_definitions.try &.[0].attribute_name # Artist

Output:

200
Music
Artist

Supported APIs

API types that can be generated:

• json

API types that are in progress:

• rest-json
• query

Name	Supported?	Integration Tests	Notes
DynamoDB	✅	✅
SSM	✅	✅
S3	🚫	🚫	Consider using awscr-s3

For example usage, please look at the integration tests. If you need an API that is not listed here, please open an issue or pull request with the generated code.

Installation

1. Add the dependency to your shard.yml:

   dependencies:
     amazonite:
       github: rjnienaber/amazonite

2. Run shards install

Development

Once you've cloned the repo, have a look at the scripts directory for some scripts that help with development. Some of them use the excellent watchexec tool to watch for changes.

• ./scripts/watch_specs.sh
  • watches for code changes and runs the specs
• ./scripts/watch_codegen.sh
  • watches for code changes and regenerates the code for apis
• ./scripts/watch_integration.cr
  • watches for code changes and executes integration tests

Contributing

1. Fork it (https://github.com/rjnienaber/amazonite/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• Richard Nienaber - creator and maintainer