Low-level DynamoDB HTTP client: SigV4 signing, retries with jittered exponential backoff, error normalisation and telemetry.

You normally don't call this directly – Dynamo.Repo does. It is exposed for tooling (mix tasks) and for people who want to send raw requests.

client = Dynamo.Client.new(region: "eu-west-1", credentials: creds)
Dynamo.Client.request(client, "ListTables", %{})
#=> {:ok, %{"TableNames" => [...]}}

Options

• :region – required
• :endpoint – full URL; defaults to https://dynamodb.<region>.amazonaws.com
• :search_endpoint – endpoint for SearchVectors, which AWS serves from a separate host; defaults to https://search-dynamodb.<region>.amazonaws.com. When a custom :endpoint is given (DynamoDB Local, a proxy), it is used for search too unless :search_endpoint is set explicitly.
• :credentials – %Dynamo.Credentials{} or {:cache, pid_or_name} of a Dynamo.Credentials.Cache (used by repos so credentials refresh automatically)
• :max_retries – default 3 (only retryable errors are retried)
• :base_backoff_ms – default 50; delay = random(0, base * 2^attempt) capped at :max_backoff_ms (default 5_000)
• :receive_timeout – default 30_000
• :connect_timeout – default 5_000
• :req_options – extra options merged into every Req call (e.g. plug: for tests)
• :telemetry_prefix – default [:dynamo]

Telemetry

[prefix, :request, :start | :stop | :exception] with measurements %{duration: native} on stop and metadata:

%{action: "Query", table: "app" | nil, attempt: 1, result: :ok | :error,
  error: %Dynamo.Error{} | nil, status: 200, consumed_capacity: map | nil}