Pipes.Aws.S3.Download.Retry

pipes Producers from downloading data from AWS S3 objects, with retry-based failure handling.

Documentation

fromS3WithRetries :: forall m. MonadSafe m => RetryPolicy m -> Bucket -> Object -> Producer ByteString m ()

Download an object from S3, retrying a finite number of times on failure.

Deciding when to retry

data RetryPolicy m

How many times to attempt an object download before giving up.

Constructors

RetryIf s (Bucket -> Object -> s -> SomeException -> m (s, Bool))

Instances

Applicative m => Monoid (RetryPolicy m)

mempty will always retry. mappend will retry only if both RetryPolicys say to retry.

Methods

mempty :: RetryPolicy m

mappend :: RetryPolicy m -> RetryPolicy m -> RetryPolicy m

mconcat :: [RetryPolicy m] -> RetryPolicy m

retryNTimes :: Applicative m => Int -> RetryPolicy m

Retry a download no more than n times.

retryIfException :: Applicative m => (SomeException -> Bool) -> RetryPolicy m

Retry if the exception thrown satisfies the given predicate.

Diagnostics

warnOnRetry :: MonadIO m => RetryPolicy m -> RetryPolicy m

Modify a RetryPolicy to print a warning on stderr when a retry is attempted.