com.alibaba.dubbo.remoting.telnet.support.command.LogTelnetHandler Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo2 Show documentation
The all in one project of dubbo2
The newest version!
/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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 com.alibaba.dubbo.remoting.telnet.support.command;


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;

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

/**
 * LogTelnetHandler
 * @author chao.liuc
 * 
 */
@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";

    public String telnet(Channel channel, String message) {
        long size = 0 ;
        File file = LoggerFactory.getFile();
        StringBuffer buf = new StringBuffer();
        if (message == null || message.trim().length() == 0) {
            buf.append("EXAMPLE: log error / log 100");
        }else {
            String str[] = message.split(" ");
            if (! StringUtils.isInteger(str[0])){
                LoggerFactory.setLevel(Level.valueOf(message.toUpperCase()));
            } else {
                int SHOW_LOG_LENGTH = Integer.parseInt(str[0]);
                
                if (file != null && file.exists()) {
                    try{
                        FileInputStream fis = new FileInputStream(file);
                        try {
	                        FileChannel filechannel = fis.getChannel();
	                        try {
		                        size = filechannel.size();
		                        ByteBuffer bb;
		                        if (size <= SHOW_LOG_LENGTH) {
		                            bb = ByteBuffer.allocate((int) size);
		                            filechannel.read(bb, 0);
		                        } else {
		                            int pos = (int) (size - SHOW_LOG_LENGTH);
		                            bb = ByteBuffer.allocate(SHOW_LOG_LENGTH);
		                            filechannel.read(bb, pos);
		                        }
		                        bb.flip();
		                        String content = new String(bb.array()).replace("<", "<")
		                        .replace(">", ">").replace("\n", "

");
		                        buf.append("\r\ncontent:"+content);
		                        
		                        buf.append("\r\nmodified:"+(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
		                        .format(new Date(file.lastModified()))));
		                        buf.append("\r\nsize:"+size +"\r\n");
	                        } finally {
	                        	filechannel.close();
	                        }
                        } finally {
                        	fis.close();
                        }
                    }catch (Exception e) {
                        buf.append(e.getMessage());
                    }
                }else {
                    size = 0;
                    buf.append("\r\nMESSAGE: log file not exists or log appender is console .");
                }
            }
        }
        buf.append("\r\nCURRENT LOG LEVEL:"+ LoggerFactory.getLevel())
        .append("\r\nCURRENT LOG APPENDER:"+ (file == null ? "console" : file.getAbsolutePath()));
        return buf.toString();
    }

}