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Implementation of the Modbus protocol in Java language
package com.invertor.modbus.msg.response;
import com.invertor.modbus.Modbus;
import com.invertor.modbus.data.comm.ModbusCommEvent;
import com.invertor.modbus.exception.ModbusNumberException;
import com.invertor.modbus.msg.base.ModbusResponse;
import com.invertor.modbus.net.stream.base.ModbusInputStream;
import com.invertor.modbus.net.stream.base.ModbusOutputStream;
import com.invertor.modbus.utils.ModbusFunctionCode;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
/*
* Copyright (C) 2016 "Invertor" Factory", JSC
* [http://www.sbp-invertor.ru]
*
* This file is part of JLibModbus.
*
* 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.
*
* Authors: Vladislav Y. Kochedykov, software engineer.
* email: [email protected]
*/
final public class GetCommEventLogResponse extends ModbusResponse {
public static final int EVENTS_OFFSET = 6;
private int status;
private int eventCount;
private int messageCount;
private List events = new LinkedList();
public GetCommEventLogResponse(int serverAddress) throws ModbusNumberException {
super(serverAddress);
}
@Override
protected void readResponse(ModbusInputStream fifo) throws IOException, ModbusNumberException {
int byteCount = fifo.read();
if (byteCount < EVENTS_OFFSET || byteCount > Modbus.MAX_PDU_LENGTH - 2)
throw new ModbusNumberException("Illegal byte count", byteCount);
setStatus(fifo.readShortBE());
setEventCount(fifo.readShortBE());
setMessageCount(fifo.readShortBE());
int eventsCount = byteCount - EVENTS_OFFSET;
if (eventsCount > 0) {
for (int i = 0; i < eventsCount; i++) {
events.add(ModbusCommEvent.getEvent(fifo.read()));
}
}
}
@Override
protected void writeResponse(ModbusOutputStream fifo) throws IOException {
fifo.write(EVENTS_OFFSET + events.size());
fifo.writeShortBE(getStatus());
fifo.writeShortBE(getEventCount());
fifo.writeShortBE(getMessageCount());
for (ModbusCommEvent event : getEventQueue()) {
fifo.write(event.getEvent());
}
}
@Override
protected int responseSize() {
return EVENTS_OFFSET + events.size();
}
@Override
public int getFunction() {
return ModbusFunctionCode.GET_COMM_EVENT_LOG.toInt();
}
public int getStatus() {
return status;
}
public void setStatus(int status) {
this.status = status;
}
public int getEventCount() {
return eventCount;
}
public void setEventCount(int eventCount) {
this.eventCount = eventCount;
}
public List getEventQueue() {
return events;
}
public void setEvents(List events) {
this.events = events;
}
public int getMessageCount() {
return messageCount;
}
public void setMessageCount(int messageCount) {
this.messageCount = messageCount;
}
}