001package org.slf4j; 002 003import org.junit.Test; 004 005public class LoggerUsage { 006 007 @Test 008 public void test() { 009 org.slf4j.Logger logger = LoggerFactory.getLogger("aa"); 010 logger.atTrace().addKeyValue("a", "n").setCause(new Throwable()).log("aa"); 011 } 012 013}