New returns a new engine.

BackoffStrategy is the backoff strategy used when attempting retryable errors.

ErrHandler is the handler function applied to an error.

ErrMissingConsumerQueue is returned when the consumer queue name is missing.

ErrMissingConsumerQueueURL is returned when the consumer queue url is missing.

ErrMissingProducerQueue is returned when the producer queue name is missing.

ErrMissingRegion is returned when the queue region is missing.

Engine represents an engine.

InvalidBlockError is an error implementation that includes a consumed message ID.

Message represents a message that has been consumed.

MissingHandlerError is an error implementation that includes a consumed message type.

HandlerFunc represents a function that is applied to a consumed message.