/*
* 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.container.page.pages;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Enumeration;
import java.util.List;
import org.apache.log4j.Appender;
import org.apache.log4j.FileAppender;
import org.apache.log4j.Level;
import org.apache.log4j.LogManager;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.container.page.Menu;
import com.alibaba.dubbo.container.page.Page;
import com.alibaba.dubbo.container.page.PageHandler;
/**
* LogPageHandler
*
* @author william.liangf
*/
@Menu(name = "Log", desc = "Show system log.", order = Integer.MAX_VALUE - 11000)
public class LogPageHandler implements PageHandler {
private static final int SHOW_LOG_LENGTH = 30000;
private File file;
@SuppressWarnings("unchecked")
public LogPageHandler() {
try {
org.apache.log4j.Logger logger = LogManager.getRootLogger();
if (logger != null) {
Enumeration<Appender> appenders = logger.getAllAppenders();
if (appenders != null) {
while (appenders.hasMoreElements()) {
Appender appender = appenders.nextElement();
if (appender instanceof FileAppender) {
FileAppender fileAppender = (FileAppender)appender;
String filename = fileAppender.getFile();
file = new File(filename);
break;
}
}
}
}
} catch (Throwable t) {
}
}
public Page handle(URL url) {
long size = 0;
String content = "";
String modified = "Not exist";
if (file != null && file.exists()) {
try {
FileInputStream fis = new FileInputStream(file);
FileChannel channel = fis.getChannel();
size = channel.size();
ByteBuffer bb;
if (size <= SHOW_LOG_LENGTH) {
bb = ByteBuffer.allocate((int) size);
channel.read(bb, 0);
} else {
int pos = (int) (size - SHOW_LOG_LENGTH);
bb = ByteBuffer.allocate(SHOW_LOG_LENGTH);
channel.read(bb, pos);
}
bb.flip();
content = new String(bb.array()).replace("<", "<")
.replace(">", ">").replace("\n", "<br/><br/>");
modified = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
.format(new Date(file.lastModified()));
} catch (IOException e) {
}
}
Level level = LogManager.getRootLogger().getLevel();
List<List<String>> rows = new ArrayList<List<String>>();
List<String> row = new ArrayList<String>();
row.add(content);
rows.add(row);
return new Page("Log", "Log", new String[] {(file == null ? "" : file.getName()) + ", " + size + " bytes, " + modified + ", " + level}, rows);
}
}