| Safe Haskell | None |
|---|
Pianola.Pianola.Driver
- simpleDriver :: Protocol o -> Endpoint -> Pianola Protocol LogEntry o a -> Stream FilePath -> EitherT DriverError IO a
- data DriverError
- filePathStream :: String -> Int -> String -> FilePath -> Stream FilePath
- screenshotStream :: FilePath -> Stream FilePath
Documentation
simpleDriver :: Protocol o -> Endpoint -> Pianola Protocol LogEntry o a -> Stream FilePath -> EitherT DriverError IO aSource
Runs a pianola computation. Receives as argument a monadic action to
obtain snapshots of type o of a remote system, a connection endpoint to
the remote system, a Pianola computation with context of type o and
return value of type a, and an infinite stream of filenames to store the
screenshots. Textual log messages are written to standard output. The
computation may fail with an error of type DriverError.
See also simpleSwingDriver.
data DriverError Source
Possible failure outcomes when running a pianola computation.
Constructors
| DriverIOError IOException | Local exception while storing screenshots or log messages. |
| PianolaIOError IOException | Exception when connecting the remote system. |
| PianolaParseError Text | Remote system returns unparseable data. |
| PianolaSnapshotError Int Int | An operation was requested on an obsolete snapshot (first integer) of the remote system (whose current snapshot number is the second integer). |
| PianolaServerError Text | Server couldn't complete requested operation (either because it doesn't support the operation or because of an internal error.) |
| PianolaFailure | Failure from a call to |
Instances
filePathStream :: String -> Int -> String -> FilePath -> Stream FilePathSource
A more general version of screenshotStream, which allows the client to
specify the prefix before the file number, the amount of padding for the
file number, and the suffix after the file number.
screenshotStream :: FilePath -> Stream FilePathSource
Returns an infinite stream of filenames for storing screenshots, located in the directory supplied as a parameter.