org.nees.daq.ControlPort Class Reference

Mediates the connection between DAQ and any internal requester. More...

List of all members.

Public Member Functions
	ControlPort (Socket socket) throws UnknownHostException, IOException
	Constructor - get reader/writer from socket.
String[]	getChannels () throws IOException
	Routine to query and parse the list of DAQ channels.
void	subscribe (String channel) throws IOException
	Subscribe to a DAQ channel.
void	unsubscribe (String channel) throws IOException
	Unsubscribe from a previously subscribed DAQ channel.

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Detailed Description

Mediates the connection between DAQ and any internal requester.

This class presents a DAQ control port with support to get the DAQ channel list. One uses this to connect to the controller, get the list of availabe channels, and subscribe or unsubscribe to a specific channel, by name. THe data for the subscribed channels is delivered on a seperate socket (see DaqToRbnb)

See also:

DaqToRbnb

Definition at line 28 of file ControlPort.java.

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Constructor & Destructor Documentation

org.nees.daq.ControlPort.ControlPort (  Socket  socket  )  throws UnknownHostException, IOException

Constructor - get reader/writer from socket. Parameters: socket  TCP socket to DAQ control port Note: We assume the socket is in place before we are called Definition at line 38 of file ControlPort.java.

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Member Function Documentation

String [] org.nees.daq.ControlPort.getChannels (   )  throws IOException

Routine to query and parse the list of DAQ channels. Note: DAQ comms must be open and ready. Return values: ChannelList  List of channels, array of Strings Definition at line 53 of file ControlPort.java.

void org.nees.daq.ControlPort.subscribe (  String  channel  )  throws IOException

Subscribe to a DAQ channel. This method turns on the data flow from the specified DAQ channel. If the connection (to a socket) was not made, if the connection failes, if the attempt to write to the socket fails, or if the channel is not available, then an IOException will be thrown. Exceptions: IOException  Parameters: channel  DAQ channel ID Definition at line 149 of file ControlPort.java. References org.nees.daq.ControlPort.subscribe(). Referenced by org.nees.daq.ControlPort.subscribe().

void org.nees.daq.ControlPort.unsubscribe (  String  channel  )  throws IOException

Unsubscribe from a previously subscribed DAQ channel. This method turns off data flow from the specified DAQ channel. If the connection (to a socket) was not made, if the connection failes, if the attempt to write to the socket fails, or if the channel is not available, then an IOException will be thrown. Exceptions: IOExcption  Parameters: channel  DAQ channel ID Definition at line 166 of file ControlPort.java. References org.nees.daq.ControlPort.unsubscribe(). Referenced by org.nees.daq.ControlPort.unsubscribe().

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The documentation for this class was generated from the following file:

• ControlPort.java

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