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Implementation of the Modbus protocol in Java language
package com.invertor.modbus.net.stream.base;
import com.invertor.modbus.Modbus;
import com.invertor.modbus.utils.ByteFifo;
import com.invertor.modbus.utils.DataUtils;
import java.io.IOException;
/*
* 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]
*/
/**
* this class allows to log a content of the output stream before it'll be flushed.
*
* @author kochedykov
* @since 1.2
*/
public class LoggingOutputStream extends ModbusOutputStream {
final static private String LOG_MESSAGE_TITLE = "Frame sent: ";
/**
* The output stream to be logged
*/
final private ModbusOutputStream out;
final private ByteFifo fifo = new ByteFifo(Modbus.MAX_PDU_LENGTH);
public LoggingOutputStream(ModbusOutputStream out) {
this.out = out;
}
@Override
public void write(byte[] b) throws IOException {
out.write(b);
if (Modbus.isLoggingEnabled()) {
fifo.write(b);
}
}
@Override
public void write(int b) throws IOException {
out.write(b);
if (Modbus.isLoggingEnabled()) {
fifo.write(b);
}
}
@Override
public void flush() throws IOException {
out.flush();
log();
}
public void log() {
if (Modbus.isLoggingEnabled()) {
Modbus.log().info(new StringBuilder().append(LOG_MESSAGE_TITLE).append(DataUtils.toAscii(fifo.toByteArray())).toString());
fifo.reset();
}
}
public byte[] toByteArray() {
return out.toByteArray();
}
}