org.apache.dubbo.qos.legacy.LogTelnetHandler Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo Show documentation
The all in one project of dubbo
There is a newer version: 3.3.2
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.dubbo.qos.legacy;

import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.common.logger.Level;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.remoting.Channel;
import org.apache.dubbo.remoting.telnet.TelnetHandler;
import org.apache.dubbo.remoting.telnet.support.Help;

import java.io.File;
import java.io.FileInputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * LogTelnetHandler
 */
@Activate
@Help(parameter = "level", summary = "Change log level or show log ", detail = "Change log level or show log")
public class LogTelnetHandler implements TelnetHandler {

    public static final String SERVICE_KEY = "telnet.log";

    @Override
    public String telnet(Channel channel, String message) {
        long size;
        File file = LoggerFactory.getFile();
        StringBuilder buf = new StringBuilder();
        if (message == null || message.trim().length() == 0) {
            buf.append("EXAMPLE: log error / log 100");
        } else {
            String[] str = message.split(" ");
            if (!StringUtils.isNumber(str[0])) {
                LoggerFactory.setLevel(Level.valueOf(message.toUpperCase()));
            } else {
                int showLogLength = Integer.parseInt(str[0]);

                if (file != null && file.exists()) {
                    try (FileInputStream fis = new FileInputStream(file)) {
                        FileChannel filechannel = fis.getChannel();
                        size = filechannel.size();
                        ByteBuffer bb;
                        if (size <= showLogLength) {
                            bb = ByteBuffer.allocate((int) size);
                            filechannel.read(bb, 0);
                        } else {
                            int pos = (int) (size - showLogLength);
                            bb = ByteBuffer.allocate(showLogLength);
                            filechannel.read(bb, pos);
                        }
                        bb.flip();
                        String content = new String(bb.array())
                                .replace("<", "<")
                                .replace(">", ">")
                                .replace("\n", "

");
                        buf.append("\r\ncontent:").append(content);

                        buf.append("\r\nmodified:")
                                .append(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
                                        .format(new Date(file.lastModified())));
                        buf.append("\r\nsize:").append(size).append("\r\n");
                    } catch (Exception e) {
                        buf.append(e.getMessage());
                    }
                } else {
                    buf.append("\r\nMESSAGE: log file not exists or log appender is console .");
                }
            }
        }
        buf.append("\r\nCURRENT LOG LEVEL:")
                .append(LoggerFactory.getLevel())
                .append("\r\nCURRENT LOG APPENDER:")
                .append(file == null ? "console" : file.getAbsolutePath());
        return buf.toString();
    }
}