欧美bbbwbbbw肥妇,免费乱码人妻系列日韩,一级黄片

關于log4j日志擴展---自定義PatternLayout

 更新時間:2021年12月23日 08:40:36   作者:KuseBear  
這篇文章主要介紹了關于log4j日志擴展---自定義PatternLayout,具有很好的參考價值,希望對大家有所幫助。如有錯誤或未考慮完全的地方,望不吝賜教

log4j日志擴展---PatternLayout

目前擴展log4j的日志一般使用擴展adaper的方法,這里使用一種擴展PatternLayout方法。

log4j.rootLogger=debug, stdout, R
 
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
 
# Pattern to output the caller's file name and line number.
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=example.log
log4j.appender.R.MaxFileSize=100KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n

這是log4j官網(wǎng)上的配置

請注意:

log4j.appender.stdout=org.apache.log4j.ConsoleAppender 
log4j.appender.R.layout=org.apache.log4j.PatternLayout

注意到其實這是兩個類

那么org.apache.log4j.ConsoleAppender可以自定義,思考是否可以自定義log4j.appender.R.layout=org.apache.log4j.PatternLayout

下載官方文件發(fā)現(xiàn)有這樣兩個類

/*
 * 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 examples; 
import org.apache.log4j.*;
import org.apache.log4j.helpers.PatternParser;
 
/**
  Example showing how to extend PatternLayout to recognize additional
  conversion characters.  
  
  <p>In this case MyPatternLayout recognizes %# conversion pattern. It
  outputs the value of an internal counter which is also incremented
  at each call.
  <p>See <a href=doc-files/MyPatternLayout.java><b>source</b></a> code
  for more details.
  @see MyPatternParser
  @see org.apache.log4j.PatternLayout
  @author Anders Kristensen 
*/
public class MyPatternLayout extends PatternLayout {
  public
  MyPatternLayout() {
    this(DEFAULT_CONVERSION_PATTERN);
  }
 
  public
  MyPatternLayout(String pattern) {
    super(pattern);
  }
    
  public
  PatternParser createPatternParser(String pattern) {
    return new MyPatternParser(
      pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
  }
  
  public
  static void main(String[] args) {
    Layout layout = new MyPatternLayout("[counter=%.10#] - %m%n");
    Logger logger = Logger.getLogger("some.cat");
    logger.addAppender(new ConsoleAppender(layout, ConsoleAppender.SYSTEM_OUT));
    logger.debug("Hello, log");
    logger.info("Hello again...");    
  }
}
/*
 * 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 examples; 
import org.apache.log4j.helpers.FormattingInfo;
import org.apache.log4j.helpers.PatternConverter;
import org.apache.log4j.helpers.PatternParser;
import org.apache.log4j.spi.LoggingEvent;
 
/**
  Example showing how to extend PatternParser to recognize additional
  conversion characters.  The examples shows that minimum and maximum
  width and alignment settings apply for "extension" conversion
  characters just as they do for PatternLayout recognized characters.
  
  <p>In this case MyPatternParser recognizes %# and outputs the value
  of an internal counter which is also incremented at each call.
  See <a href=doc-files/MyPatternParser.java><b>source</b></a> code
   for more details.
  
  @see org.apache.log4j.examples.MyPatternLayout
  @see org.apache.log4j.helpers.PatternParser
  @see org.apache.log4j.PatternLayout
  @author Anders Kristensen 
*/
public class MyPatternParser extends PatternParser { 
  int counter = 0; 
  public
  MyPatternParser(String pattern) {
    super(pattern);
  }
    
  public
  void finalizeConverter(char c) {
    if (c == '#') {
      addConverter(new UserDirPatternConverter(formattingInfo));
      currentLiteral.setLength(0);
    } else {
      super.finalizeConverter(c);
    }
  }
  
  private class UserDirPatternConverter extends PatternConverter {
    UserDirPatternConverter(FormattingInfo formattingInfo) {
      super(formattingInfo);
    }
 
    public
    String convert(LoggingEvent event) {
      return String.valueOf(++counter);
    }
  }  
}

直接粘過去找個類測試一下發(fā)現(xiàn)是可以使用的,顯示打印日志的行數(shù)

發(fā)現(xiàn)MyPatternLayout基本調(diào)用的是父類的方法

繼續(xù)扒

 public
  void finalizeConverter(char c) {
    if (c == '#') {
      addConverter(new UserDirPatternConverter(formattingInfo));
      currentLiteral.setLength(0);
    } else {
      super.finalizeConverter(c);
    }
  }

注意看這段代碼

發(fā)現(xiàn)字符為"#"的時候,創(chuàng)建了UserDirPatternConverter

推薦大家去看PatternParser這里面有答案

給大家舉個例子

%#{MMMM}

使用extractOption()可以獲得MMMM

有了MMMM是不是就可以處理很多問題.

想一下,比如我們要在日志里面打印公司的編號 orgId

那么首先配置

log4j.appender.R.layout.ConversionPattern= %#{orgId}  %p %t %c - %m%n

這樣的話

if (c == '#') {
            String exs = super.extractOption();  //獲取orgId
            addConverter(new ExrPatternConverter(formattingInfo, exs));
            currentLiteral.setLength(0); 
        } else {
            super.finalizeConverter(c);
        }

考慮orgId的賦值問題

使用ThreadLocal

故完整的代碼

package com.yogapay.core; 
import java.util.HashMap;
import java.util.Map; 
import org.apache.log4j.helpers.FormattingInfo;
import org.apache.log4j.helpers.PatternConverter;
import org.apache.log4j.helpers.PatternParser;
import org.apache.log4j.spi.LoggingEvent; 
public class ExPatternParser extends PatternParser {
 
 static final ThreadLocal<Map<String, Object>> TH_LOCAL = new ThreadLocal<Map<String, Object>>(){
  @Override
        protected HashMap<String, Object> initialValue() {
            return new HashMap<String, Object>();
        } 
 };
 
 public static void setCurrentValue(String key, Object value) {
  Map<String, Object> map = TH_LOCAL.get();
  map.put(key, value);  
 }
 
 public ExPatternParser(String pattern) {
  super(pattern);
 }
 
 public void finalizeConverter(char c) {
  if (c == '#') {
   String exs = super.extractOption();
   addConverter(new ExrPatternConverter(formattingInfo, exs));
   currentLiteral.setLength(0); 
  } else {
   super.finalizeConverter(c);
  }
 }
 
 private class ExrPatternConverter extends PatternConverter { 
  private String cfg; 
  ExrPatternConverter(FormattingInfo formattingInfo, String cfg) {
   super(formattingInfo);
   this.cfg = cfg;
  }
 
  public String convert(LoggingEvent event) {
   Map<String, Object> valueMap = TH_LOCAL.get();
   if (valueMap != null) {
    Object value = valueMap.get(cfg);
    if (value != null) {
     return String.valueOf(value);
    }
   }
   return "";
  }
 }
}
package com.yogapay.core; 
import org.apache.log4j.*;
import org.apache.log4j.helpers.PatternParser; 
public class ExPatternLayout extends PatternLayout {
 public ExPatternLayout() {
  this(DEFAULT_CONVERSION_PATTERN);
 }
 
 public ExPatternLayout(String pattern) {
  super(pattern);
 } 
        @Override
 public PatternParser createPatternParser(String pattern) {
  return new ExPatternParser(pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
 }
}
### set log levels ###
log4j.rootLogger = info,stdout
 
### 輸出到控制臺 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = com.yogapay.core.ExPatternLayout
log4j.appender.stdout.layout.ConversionPattern = lgcNo:%#{orgId} %d{yyyy-MM-dd HH:mm:ss} [%t] %p [%c] - %m%n

到此擴展就完成呢!

擴展log4j---自定義日志文件創(chuàng)建

之前使用過logstash,發(fā)現(xiàn)它的文件寫入功能比log4j更加完善

logstash允許動態(tài)創(chuàng)建文件夾,我只使用了按照日期創(chuàng)建日志文件

如果配置日志路徑如下

/home/log/log/%{yyyy}/%{MM}/%{dd}-log.log

那么就會創(chuàng)建路徑為/home/log/log/2018/06/12-log.log的文件

log4j有個DailyRollingFileAppender,支持按一定時間規(guī)則寫入日志,但是創(chuàng)建規(guī)則是在原有的日志文件之后加上時間后綴,這樣所有日志文件都在一個文件夾,非常不友好

因此,我自定義了appender,允許創(chuàng)建文件夾的方式存儲日志文件,每天凌晨寫入新的日志文件

內(nèi)容如下

import org.apache.log4j.spi.LoggingEvent; 
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/**
 * @author 墨盒
 */
public class EveryDayRollingFileAppender extends FileAppender { 
    private SimpleDateFormat format;
    private String fileName; 
    private Level level; 
    private static final String SEPERTOR = "-";
    private String regex = "\\{([^\\{\\}]+)\\}";// 
    private long next; 
    private Date now; 
    public Level getLevel() {
        return level;
    }
 
    public void setLevel(Level level) {
        this.level = level;
    }
 
    public EveryDayRollingFileAppender() {
        now = new Date();
        level = Level.WARN;
    }
 
 
    public String getFileName() {
        return fileName;
    }
 
    public void setFileName(String fileName) {
        this.fileName = fileName;
    }
 
    //TODO 18-6-16 該方法被調(diào)用了兩次
    @Override
    public void activateOptions() {
        Pattern pattern = Pattern.compile(regex);  
        Matcher matcher = pattern.matcher(fileName);
        StringBuilder builder = new StringBuilder();
        while (matcher.find()) {
            String temp = matcher.group(1); 
            builder.append(temp).append(SEPERTOR);
 
        }
        if (builder.length() != 0) {
            format = new SimpleDateFormat(builder.deleteCharAt(builder.length() - 1).toString());
            changeFile();
            setNextTime();日志采集小工具
        } else {
            format = null;
            try {
                setFile(fileName, getAppend(), getBufferedIO(), getBufferSize());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }  
    }
 
    private void changeFile() {
        if (format != null) {
            try {
                setFile(createFile(), getAppend(), getBufferedIO(), getBufferSize());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
 
    protected void setNextTime() {
        Calendar c = Calendar.getInstance();
        c.setTime(now);
        c.add(Calendar.DAY_OF_YEAR, 1);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.HOUR, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 0);
        next = c.getTimeInMillis(); 
        System.out.println(new Date(next));
    } 
 
    @Override
    protected void subAppend(LoggingEvent event) {
        if (event.getLevel().syslogEquivalent <= level.syslogEquivalent) {
            long n = System.currentTimeMillis();
            if (n >= next) {
                now.setTime(n); 
                changeFile(); 
                setNextTime();  
            }
            super.subAppend(event);
        }
    }
 
    public String createFile() {
        String file = format.format(now); 
        String s[] = file.split(SEPERTOR); 
        String temp = fileName;
        for (int i = 0; i < s.length; i++) {
            temp = temp.replaceFirst(regex, s[i]);
        } 
 
        File f = new File(temp);
        if (!f.getParentFile().exists())
            f.getParentFile().mkdirs();
        else if (f.exists())
            f.delete(); 
        return f.getAbsolutePath(); 
    }
}

log4j配置如下

log4j.appender.logfile=org.apache.log4j.EveryDayRollingFileAppender
# 需要寫入的日志級別
log4j.appender.logfile.level=INFO
# 日志路徑
log4j.appender.logfile.fileName=/home/inkbox/log/log/{yyyy}/{MM}/{dd}_logSocket.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%m%n

以上為個人經(jīng)驗,希望能給大家一個參考,也希望大家多多支持腳本之家。

相關文章

  • Java之判斷2000~2023年有哪些年份是閏年并打印輸出

    Java之判斷2000~2023年有哪些年份是閏年并打印輸出

    這篇文章主要介紹了Java之判斷2000~2023年有哪些年份是閏年并打印輸出,具有很好的參考價值,希望對大家有所幫助,如有錯誤或未考慮完全的地方,望不吝賜教
    2023-12-12
  • Java使用FileInputStream流讀取文件示例詳解

    Java使用FileInputStream流讀取文件示例詳解

    這篇文章主要介紹了Java使用FileInputStream流讀取文件示例詳解,文中通過示例代碼介紹的非常詳細,對大家的學習或者工作具有一定的參考學習價值,需要的朋友們下面隨著小編來一起學習學習吧
    2020-07-07
  • Java編程語言特性和優(yōu)勢

    Java編程語言特性和優(yōu)勢

    這篇文章主要介紹了Java編程語言特性和優(yōu)勢,Java是一門面向?qū)ο缶幊陶Z言,不僅吸收了C++語言的各種優(yōu)點,還摒棄了C++里難以理解的多繼承、指針等概念,同時也增加了垃圾回收機制,釋放掉不被使用的內(nèi)存空間,解決了管理內(nèi)存空間的煩惱,下面來聊聊Java編程語言特性和優(yōu)勢吧
    2022-01-01
  • 使用@ApiModel遇到的問題及解決

    使用@ApiModel遇到的問題及解決

    這篇文章主要介紹了使用@ApiModel遇到的問題及解決,具有很好的參考價值,希望對大家有所幫助。如有錯誤或未考慮完全的地方,望不吝賜教
    2022-06-06
  • JAVA Iterator接口與增強for循環(huán)的實現(xiàn)

    JAVA Iterator接口與增強for循環(huán)的實現(xiàn)

    這篇文章主要介紹了JAVA Iterator接口與增強for循環(huán)的實現(xiàn),文中通過示例代碼介紹的非常詳細,對大家的學習或者工作具有一定的參考學習價值,需要的朋友們下面隨著小編來一起學習學習吧
    2020-11-11
  • Spring配置多數(shù)據(jù)源導致事物無法回滾問題

    Spring配置多數(shù)據(jù)源導致事物無法回滾問題

    這篇文章主要介紹了Spring配置多數(shù)據(jù)源導致事物無法回滾問題,具有很好的參考價值,希望對大家有所幫助,如有錯誤或未考慮完全的地方,望不吝賜教
    2024-01-01
  • java接口自動化測試框架及斷言詳解

    java接口自動化測試框架及斷言詳解

    這篇文章主要介紹了java接口自動化測試框架及斷言詳解,文中通過示例代碼介紹的非常詳細,對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下
    2019-07-07
  • 淺析Java類和數(shù)據(jù)結(jié)構中常用的方法

    淺析Java類和數(shù)據(jù)結(jié)構中常用的方法

    下面小編就為大家?guī)硪黄獪\析Java類和數(shù)據(jù)結(jié)構中常用的方法。小編覺得挺不錯的,現(xiàn)在就分享給大家,也給大家做個參考。一起跟隨小編過來看看吧
    2016-09-09
  • Java之對象銷毀和finalize方法的使用

    Java之對象銷毀和finalize方法的使用

    這篇文章主要介紹了Java之對象銷毀和finalize方法的使用,具有很好的參考價值,希望對大家有所幫助。如有錯誤或未考慮完全的地方,望不吝賜教
    2022-07-07
  • Maven依賴中scope的含義

    Maven依賴中scope的含義

    本文主要介紹了Maven依賴中scope的含義,文中通過示例代碼介紹的非常詳細,對大家的學習或者工作具有一定的參考學習價值,需要的朋友們下面隨著小編來一起學習學習吧
    2023-01-01

最新評論