An official formula for dynamodb-local existed, but was removed since dynamodb-local is not open source and stopped having versions.
Now its available either through a Cask, or by installing it as a formula from an unofficial tap (third party repo).
When installed as a cask dynamodb-local cannot be exposed as a service, so here we are installing it as a formula. It has been forked from rjcoelho/homebrew-boneyard and updated to be a head-only formula, to avoid checksum erros on new versions. It is available at dgoguerra/homebrew-boneyard.
# dynamodb-local depends on Java 6+