文件附加程序中来自web.xml的logback值 [英] logback value from web.xml in file appender

问题描述

我正在为Glassfish服务器开发Java Web应用程序.我在设置File Appender的路径时遇到问题.我想使用在web.xml中定义的变量.

I am developing Java web application for Glassfish server. I have problem with setting path for File appender. I would like to use variable which is defined in web.xml.

Web.xml:

<context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>app.myApp-client.home</param-value>
</context-param>

Logback.xml(在src/main/resurces中)

Logback.xml (in src/main/resurces)

    <appender name="FILE" class="ch.qos.logback.core.FileAppender">        
    <file>${app.myApp-client.home}/WEB-INF/app-log/client.log</file>        
    <encoder>
        <pattern>%date %level [%file:%line] %msg%n</pattern>
    </encoder>
</appender>

将我的应用程序部署在名称为

After deploy my application on Glassfish log file with name

/app.myApp-client.home_IS_UNDEFINED/WEB-INF/app-log/client.log

/app.myApp-client.home_IS_UNDEFINED/WEB-INF/app-log/client.log

已创建.为什么参数app.myApp-client.home未定义?有没有更好的选择将应用程序路径放置到文件追加器?

is created. Why parameter app.myApp-client.home is undefined? Is there any better option for put application path to file appender?

谢谢.

推荐答案

可以将变量设置为值

It is possible to set variables to values obtained via JNDI. In your case, you would write:

  <insertFromJNDI env-entry-name="java:comp/env/webAppRootKey" as="webAppRootKey" />

  <appender name="FILE" class="ch.qos.logback.core.FileAppender">        
    <file>${webAppRootKey}/WEB-INF/app-log/client.log</file>        
    <encoder>
      <pattern>%date %level [%file:%line] %msg%n</pattern>
    </encoder>
  </appender>

以上内容应该可以很好地工作.此外，您可能还会发现为设置默认值很有用. >.

The above should work nicely. In addition, you might also find it useful to set a default value for ${webAppRootKey}.

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