将上下文路径添加到 SLF4J 日志语句 [英] Adding context path to SLF4J log statements

问题描述

我在单个 tomcat 中部署了多个 Spring webapp，并将错误消息记录在单个日志文件中.我需要记录请求被命中的 web 应用程序的上下文路径.目前我必须实现一个 servlet 过滤器，以便为每个请求设置变量值.这必须完成，因为 MDC 实例是每个线程的.

I have multiple Spring webapps deployed in single tomcat, and logging the error messages in single log file. I need to log the context path of the webapp to which the request was hit. Currently I have to implement a servlet filter so that the variable value is set for each request. This has to be done because MDC instance is per thread.

由于应用程序的上下文路径是恒定的，有没有办法只设置一次 MDC 变量?

log4j.appender.LOGFILE.layout.ConversionPattern=%d %X{applicationId} %-5p %c - %m%n 

为了在 MDC 中设置 applicationId 我已经定义了一个 Servlet 过滤器

To set the applicationId in MDC I have defined a Servlet Filter

public class LogFilter implements Filter {

  @Override
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
      throws IOException, ServletException {
    MDC.put("applicationId", request.getServletContext().getContextPath());
    chain.doFilter(request, response);
  }
}

推荐答案

没找到其他方法，所以问题中提到的代码似乎是唯一的选择.关闭线程.

Didn't find any other way, so the code mentioned in the question seems to be the only option. Closing the thread.

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