在Rails 3应用程序的tomcat jruby-rack上使用log4j进行日志记录 [英] Logging with log4j on tomcat jruby-rack for a Rails 3 application

问题描述

我只是花了3个小时的大部分时间来尝试用Log4j记录我的Rails应用程序.我终于让它工作了，但是我不确定我所做的是否正确.我尝试了各种方法，直到最后一次尝试都无济于事.所以我真的在这里寻找一些验证，也许还有一些指示和技巧-老实说，任何事情都将受到赞赏.我将我所有微弱的方法总结为以下三种尝试.我希望能对我每次尝试出错的地方有所启发-即使这意味着我被撕裂了.

I just spent the better part of 3 hours trying to get my Rails application logging with Log4j. I've finally got it working, but I'm not sure if what I did is correct. I tried various methods to no avail until my very last attempt. So I'm really looking for some validation here, perhaps some pointers and tips as well -- anything would be appreciated to be honest. I've summarized all my feeble methods into three attempts below. I'm hoping for some enlightenment on where I went wrong with each attempt -- even if it means I get ripped up.

感谢您的提前帮助！

• Rails 3.0
• Windows Server 2008
• Log4j 1.2
• Tomact 6.0.29
• Java 6

我基本上遵循了Apache Tomcat网站此处上的指南>.这些步骤是:

I basically followed the guide on the Apache Tomcat website here. The steps are:

1. 在$CATALINA_HOME/lib
中创建一个log4j.properties文件
2. 下载log4j-x.y.z.jar并将其复制到$CATALINA_HOME/lib
3. 用Apache Tomcat Extras文件夹中的tomcat-juli.jar替换$CATALINA_HOME/bin/tomcat-juli.jar
4. 将tomcat-juli-adapters.jar从Apache Tomcat Extras文件夹复制到$CATALINA_HOME/lib
5. 删除$CATALINA_BASE/conf/logging.properties
6. 启动Tomcat(作为服务)

1. Create a log4j.properties file in $CATALINA_HOME/lib
2. Download and copy the log4j-x.y.z.jar into $CATALINA_HOME/lib
3. Replace $CATALINA_HOME/bin/tomcat-juli.jar with the tomcat-juli.jar from the Apache Tomcat Extras folder
4. Copy tomcat-juli-adapters.jar from the Apache Tomcat Extras folder into $CATALINA_HOME/lib
5. Delete $CATALINA_BASE/conf/logging.properties
6. Start Tomcat (as a service)

根据指南的预期结果

我应该在$CATALINA_BASE/logs文件夹中看到一个tomcat.log文件.

Expected Results According to the Guide

I should have seen a tomcat.log file in my $CATALINA_BASE/logs folder.

• 没有tomcat.log
• 改为看到三个 standard 日志
  • jakarta_service_20101231.log
  • stderr_20101231.log
  • stdout_20101231.log
  • No tomcat.log
  • Saw three of the standard logs instead
    • jakarta_service_20101231.log
    • stderr_20101231.log
    • stdout_20101231.log
    • 我至少没有看过tomcat.log文件吗?
    • Shouldn't I have at least seen a tomcat.log file?
    1. 还原了先前设置中的所有更改

    2. 通过执行以下操作修改$CATALINA_BASE/conf/logging.properties:

    1. 在handlers行中为我的应用程序添加设置:5rails3.org.apache.juli.FileHandler

    2. 添加处理程序特定的属性

    1. Adding a setting for my application in the handlers line: 5rails3.org.apache.juli.FileHandler

    2. Adding Handler specific properties

    5rails3.org.apache.juli.FileHandler.level = FINE
    5rails3.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
    5rails3.org.apache.juli.FileHandler.prefix = rails3.
    

  • 添加设施专用属性

  • Adding Facility specific properties

    org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/rails3].level = INFO
    org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/rails3].handlers = 4host-manager.org.apache.juli.FileHandler
    

  • 通过根据jruby-rack README的Logging部分添加以下上下文参数来修改我的web.xml(我也相应地修改了warbler.rb，但我选择直接更改web.xml进行测试速度更快).

  • Modified my web.xml by adding the following context parameter as per the Logging section of the jruby-rack README (I also modified my warbler.rb accordingly, but I opted to change the web.xml directly to test things faster).

    <context-param>
      <param-name>jruby.rack.logging</param-name>
      <param-value>commons_logging</param-value>
    </context-param>
    

  • 重新启动Tomcat

  • Restarted Tomcat

    结果

    • 已创建日志文件(rails3.log)，但是该文件中没有日志信息.

    Results

    • A log file was created (rails3.log), however there was no log information in the file.

    我决定通过此新的web.xml设置再次给Log4j发动.

    I decided to give Log4j another whirl with this new web.xml setting.

    1. 将log4j.jar复制到我的WEB-INF/lib文件夹中

    2. 创建了一个log4j.properties文件并将其放入WEB-INF/classes

    1. Copied the log4j.jar into my WEB-INF/lib folder

    2. Created a log4j.properties file and put it into WEB-INF/classes

    log4j.rootLogger=INFO, R
    log4j.logger.javax.servlet=DEBUG
    
    log4j.appender.R=org.apache.log4j.RollingFileAppender
    log4j.appender.R.File=${catalina.base}/logs/rails3.log
    log4j.appender.R.MaxFileSize=5036KB
    log4j.appender.R.MaxBackupIndex=4
    log4j.appender.R.layout=org.apache.log4j.PatternLayout
    log4j.appender.R.layout.ConversionPattern=%d{dd MMM yyyy HH:mm:ss} [%t] %-5p %c %x - %m%n
    

    • 重新启动Tomcat

    • Restarted Tomcat

      结果

      与尝试2相同

      Results

      Same as Attempt 2

      注意::之所以使用log4j.logger.javax.servlet=DEBUG，是因为我在jruby-rack README中读到，所有日志记录输出都会自动重定向到javax.servlet.ServletContext#log方法.所以我以为这会抓住它，但是我显然是错的.

      NOTE: I used log4j.logger.javax.servlet=DEBUG because I read in the jruby-rack README that all logging output is automatically redirected to the javax.servlet.ServletContext#log method. So I thought this would capture it, but I was obviously wrong.

      1. 为什么这个没用?
      2. 不是使用commons_logging API的Log4J吗?
      1. Why didn't this work?
      2. Isn't Log4J using the commons_logging API?

      尝试3-尝试使用slf4j(已完成)

      对于为什么尝试2A不起作用有些不确定，我对自己说，也许我不能对jruby.rack.logging参数使用commons_logging，因为它可能未使用commons_logging API ...(但我仍然不确定).我看到slf4j作为选项.我从未听说过它，出于好奇，我决定查找它.简要阅读了一下之后，我认为这是一个不错的选择，并决定按照这里.

      Attempt 3 - Tried out slf4j (WORKED)

      A bit uncertain as to why Attempt 2A didn't work, I thought to myself, maybe I can't use commons_logging for the jruby.rack.logging parameter because it's probably not using commons_logging API... (but I was still not sure). I saw slf4j as an option. I have never heard of it and out of curiosity, I decided to look it up. After reading about it briefly, I thought it was as good of a shot as any and decided to try it out following the instructions here.

      继续尝试2A的设置:

      1. 将slf4j-api-1.6.1.jar和slf4j-simple-1.6.1.jar复制到我的WEB-INF/lib文件夹中
      2. 我也将slf4j-log4j12-1.6.1.jar复制到了WEB-INF/lib文件夹
      3. 重新启动Tomcat
      1. Copied slf4j-api-1.6.1.jar and slf4j-simple-1.6.1.jar into my WEB-INF/lib folder
      2. I also copied slf4j-log4j12-1.6.1.jar into my WEB-INF/lib folder
      3. Restarted Tomcat

      还有 VIOLA ！现在，我的 rails3.log 文件中有日志记录信息.

      And VIOLA! I now have logging information going into my rails3.log file.

      所以最大的问题是:

      即使日志记录现在似乎可以正常工作，但我真的不确定我所做的是否正确.因此，就像我之前说的，我确实或多或少地在寻找一些验证.如果您有任何指点/技巧/建议，我也将不胜感激.谢谢！

      Even though logging seems to be working now, I'm really not sure if what I did is right. So like I said earlier, I'm really looking for some validation more or less. I'd also appreciate any pointers/tips/advice if you have any. Thanks!

      推荐答案

      我们还进行了各种实验，最后使用slf4j选项解决了.来自Java背景，我们知道slf4j，因此我们走得更远.

      We also did various experiments and finally settled with slf4j option. Coming from Java background we knew slf4j, so we didn't go further.

      <context-param>
         <param-name>jruby.rack.logging</param-name>
         <param-value>slf4j</param-value>
       </context-param>
      

      顺便说一句，使用slf4j-log4jxxx.jar时，无需将slf4j-simple-1.6.1.jar复制到tomcat/lib或WEB-INF/lib

      btw, there is no need to copy slf4j-simple-1.6.1.jar into tomcat/lib or WEB-INF/lib when using slf4j-log4jxxx.jar

      这篇关于在Rails 3应用程序的tomcat jruby-rack上使用log4j进行日志记录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！