net.wimpi.modbus.io
Class ModbusUDPTransport

java.lang.Object
  net.wimpi.modbus.io.ModbusUDPTransport

All Implemented Interfaces:

ModbusTransport

public class ModbusUDPTransport
extends Object
implements ModbusTransport

Class that implements the Modbus UDP transport flavor.

Version:

1.0 (29/04/2002)

Author:

Dieter Wimberger

Field Summary

private BytesInputStream	m_ByteIn
private BytesOutputStream	m_ByteOut
private UDPTerminal	m_Terminal

Constructor Summary

ModbusUDPTransport(UDPTerminal terminal)
Constructs a new ModbusTransport instance, for a given UDPTerminal.

Method Summary

void	close() Closes the raw input and output streams of this ModbusTransport.
ModbusRequest	readRequest() Reads a ModbusRequest from the input stream of this ModbusTransport.
ModbusResponse	readResponse() Reads a ModbusResponse from the input stream of this ModbusTransport.
void	writeMessage(ModbusMessage msg) Writes a to the output stream of this ModbusTransport.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

m_Terminal

private UDPTerminal m_Terminal

m_ByteOut

private BytesOutputStream m_ByteOut

m_ByteIn

private BytesInputStream m_ByteIn

Constructor Detail

ModbusUDPTransport

public ModbusUDPTransport(UDPTerminal terminal)

Constructs a new ModbusTransport instance, for a given UDPTerminal.

Parameters:

terminal - the UDPTerminal used for message transport.

Method Detail

close

public void close()
           throws IOException

Description copied from interface: ModbusTransport

Closes the raw input and output streams of this ModbusTransport.

Specified by:

close in interface ModbusTransport

Throws:

IOException - if a stream cannot be closed properly.

writeMessage

public void writeMessage(ModbusMessage msg)
                  throws ModbusIOException

Description copied from interface: ModbusTransport

Writes a to the output stream of this ModbusTransport.

Specified by:

writeMessage in interface ModbusTransport

Parameters:

msg - a ModbusMessage.

Throws:

ModbusIOException - data cannot be written properly to the raw output stream of this ModbusTransport.

readRequest

public ModbusRequest readRequest()
                          throws ModbusIOException

Description copied from interface: ModbusTransport

Reads a ModbusRequest from the input stream of this ModbusTransport.

Specified by:

readRequest in interface ModbusTransport

Returns:

req the ModbusRequest read from the underlying stream.

Throws:

ModbusIOException - data cannot be read properly from the raw input stream of this ModbusTransport.

readResponse

public ModbusResponse readResponse()
                            throws ModbusIOException

Description copied from interface: ModbusTransport

Reads a ModbusResponse from the input stream of this ModbusTransport.

Specified by:

readResponse in interface ModbusTransport

Returns:

res the ModbusResponse read from the underlying stream.

Throws:

ModbusIOException - data cannot be read properly from the raw input stream of this ModbusTransport.