文件附加程序中来自web.xml的logback值

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

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通过JNDI获得.对于您的情况，您应该写:

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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