Documentation

Implementation of RPC protocol for emulation, allows to manually define network nastiness via Delays datatype. TCP model is used.

List of known issues:

• Method, once being declared in net, can't be removed. Even throwTo won't help.
• In implementation, remote method is actually inlined at call position, so instance WithNamedLogger would refer to caller's logger name, not server's one.

Launches distributed scenario, emulating work of network.

Describes network nastiness.

Allows to describe most complicated behaviour of network.

Examples:

• Always 1 second delay:

Delays $ \_ _ -> return $ ConnectedIn (interval 1 sec)

• Delay varies between 1 and 5 seconds (with granularity of 1 mcs):

Delays $ \_ _ -> ConnectedIn <$> getRandomTR (interval 1 sec, interval 5 sec)

• For first 10 seconds after scenario start connection is established with probability of 1/6:

Delays $ \_ time -> do
    p <- getRandomR (0, 5)
    if (p == 0) && (time <= interval 10 sec)
        then return $ ConnectedIn 0
        else return NeverConnected

• Node with address isolatedAddr is not accessible:

Delays $ \serverAddr _ ->
    return if serverAddr == isolatedAddr
           then NeverConnected
           else ConnectedIn 0

Describes obstructions occured on executing RPC request.

Return a randomly-selected time value in specified range.