利用MDC增加traceID

package qsq.biz.repay.filter;

import org.slf4j.MDC;
import qsq.biz.common.util.UniqUtil;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

/**

• 增加输出日志traceId
  /
  @WebFilter(urlPatterns = "/", filterName = "logbackFilter")
  public class LogbackFilter implements Filter {

  private static final String UNIQUE_ID = "traceId";

  @Override
  public void init(FilterConfig filterConfig) throws ServletException {

  }

  @Override
  public void doFilter(ServletRequest request, ServletResponse response,
  FilterChain chain) throws IOException, ServletException {
  boolean isInserted = insertMDC();
  try {
  chain.doFilter(request, response);
  } finally {
  if(isInserted) {
  MDC.remove(UNIQUE_ID);
  }
  }
  }

  private boolean insertMDC() {
  MDC.put(UNIQUE_ID, UniqUtil.uniqid());
  return true;
  }

  @Override
  public void destroy() {

  }

}