Cloud Sleuth+logback 设置traceid

import com.amcc.open.tracer;
import org.springframework.cloud.sleuth.instrument.web.TraceWebServletAutoConfiguration;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.filter.GenericFilterBean;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * http response写入traceid，方便前端排查
 * 
 * @author splendor.s
 * @date 2021/10/19 10:57 下午
 */
@Component
@Order(TraceWebServletAutoConfiguration.TRACING_FILTER_ORDER + 1)
public class TraceFilter extends GenericFilterBean {

    private final Tracer tracer;

    TraceFilter(Tracer tracer) {
        this.tracer = tracer;
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException {
        Span currentSpan = this.tracer.currentSpan();
        if (currentSpan == null) {
            chain.doFilter(request, response);
            return;
        }
        //自定义对象头
        ((HttpServletResponse)response).addHeader("TRACE-ID", currentSpan.context().traceIdString());
        chain.doFilter(request, response);
    }    
}

logbak可以这样设置： 

<pattern>%d{yyyy-MM-dd HH:mm:ss.SSS}[${applicationName},%X{X-B3-TraceId:-},%X{userId:-}] [%thread] %-5level %logger{50} - %msg%n</pattern>