/***
* Copyright 2002-2010 jamod development team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
***/
package net.wimpi.modbus.net;
import java.net.InetAddress;
import net.wimpi.modbus.io.ModbusTransport;
/**
* Interface defining a <tt>UDPTerminal</tt>.
*
* @author Dieter Wimberger
* @version @version@ (@date@)
*/
public interface UDPTerminal {
/**
* Returns the local address of this <tt>UDPTerminal</tt>.
*
* @return an <tt>InetAddress</tt> instance.
*/
public InetAddress getLocalAddress();
/**
* Returns the local port of this <tt>UDPTerminal</tt>.
*
* @return the local port as <tt>int</tt>.
*/
public int getLocalPort();
/**
* Tests if this <tt>UDPTerminal</tt> is active.
*
* @return <tt>true</tt> if active, <tt>false</tt> otherwise.
*/
public boolean isActive();
/**
* Activate this <tt>UDPTerminal</tt>.
*
* @throws java.lang.Exception if there is a network failure.
*/
public void activate() throws Exception;
/**
* Deactivates this <tt>UDPTerminal</tt>.
*/
public void deactivate();
/**
* Returns the <tt>ModbusTransport</tt> associated with this
* <tt>UDPTerminal</tt>.
*
* @return a <tt>ModbusTransport</tt> instance.
*/
public ModbusTransport getModbusTransport();
/**
* Sends the given message.
*
* @param msg the message as <tt>byte[]</tt>.
* @throws Exception if sending the message fails.
*/
public void sendMessage(byte[] msg) throws Exception;
/**
* Receives and returns a message.
*
* @return the message as a newly allocated <tt>byte[]</tt>.
* @throws Exception if receiving a message fails.
*/
public byte[] receiveMessage() throws Exception;
}// interface UDPTerminal