package org.apache.log4j; public class MDC { public static void put(String key, String value) { org.slf4j.MDC.put(key, value); } public static void put(String key, Object value) { if (value != null) { put(key, value.toString()); } else { put(key, null); } } public static Object get(String key) { return org.slf4j.MDC.get(key); } public static void remove(String key) { org.slf4j.MDC.remove(key); } public static void clear() { org.slf4j.MDC.clear(); } }