| Portability | portable |
|---|---|
| Stability | experimental |
| Maintainer | Stefan Schmidt (stefanschmidt@web.de) |
Holumbus.Network.Core
Description
Version : 0.1
The Server-Module for the Holumbus framework.
It contains the lowlevel functions, like the socket handling (opening, reading, writing, ...).
- data SocketId = SocketId HostName PortNumber
- startSocket :: ServerDispatcher -> PortNumber -> PortNumber -> IO (Maybe (ThreadId, HostName, PortNumber))
- sendRequest :: (Handle -> IO a) -> HostName -> PortNumber -> IO a
- performUnsafeSendRequest :: (Handle -> IO a) -> HostName -> PortNumber -> IO a
- performSafeSendRequest :: (Handle -> IO a) -> a -> HostName -> PortNumber -> IO a
- performMaybeSendRequest :: (Handle -> IO a) -> HostName -> PortNumber -> IO (Maybe a)
- putMessage :: ByteString -> Handle -> IO ()
- getMessage :: Handle -> IO ByteString
- data ThreadIdException = ThreadIdException ThreadId
Socket-Descriptor
All data, that is needed to address a socket. Contains the hostname and the portNumber.
Constructors
| SocketId HostName PortNumber |
Server-Operations
Arguments
| :: ServerDispatcher | dispatcher function |
| -> PortNumber | start port number |
| -> PortNumber | end port number |
| -> IO (Maybe (ThreadId, HostName, PortNumber)) |
Creates a new (unix-)socket and starts the listener in its own thread. You'll get the threadId of the listener Thread, so you can kill it. It is also possible to give a range of PortNumbers on which the socket will be opened. The first portnumber available will be taken.
Client-Operations
sendRequest :: (Handle -> IO a) -> HostName -> PortNumber -> IO aSource
Send the query to a server and merge the result with the global result.
performUnsafeSendRequest :: (Handle -> IO a) -> HostName -> PortNumber -> IO aSource
performSafeSendRequest :: (Handle -> IO a) -> a -> HostName -> PortNumber -> IO aSource
performMaybeSendRequest :: (Handle -> IO a) -> HostName -> PortNumber -> IO (Maybe a)Source
Handle-Operations
putMessage :: ByteString -> Handle -> IO ()Source
Puts a bytestring to a handle. But to make the reading easier, we write the length of the data as a message-header to the handle, too.
getMessage :: Handle -> IO ByteStringSource
Reads data from a stream. We define, that the first line of the message is the message header which tells us how much bytes we have to read.
data ThreadIdException Source
Constructors
| ThreadIdException ThreadId |