| /* |
| * Copyright 2001-2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.log4j; |
| |
| import org.slf4j.MDC; |
| |
| import java.util.Stack; |
| |
| /** |
| * A log4j's NDC implemented in terms of SLF4J MDC primitives. |
| * |
| * @since SLF4J 1.6.0 |
| */ |
| |
| public class NDC { |
| |
| public final static String PREFIX = "NDC"; |
| |
| public static void clear() { |
| int depth = getDepth(); |
| for (int i = 0; i < depth; i++) { |
| String key = PREFIX + i; |
| MDC.remove(key); |
| } |
| } |
| |
| @SuppressWarnings("rawtypes") |
| public static Stack cloneStack() { |
| return null; |
| } |
| |
| @SuppressWarnings("rawtypes") |
| public static void inherit(Stack stack) { |
| } |
| |
| static public String get() { |
| return null; |
| } |
| |
| public static int getDepth() { |
| int i = 0; |
| while (true) { |
| String val = MDC.get(PREFIX + i); |
| if (val != null) { |
| i++; |
| } else { |
| break; |
| } |
| } |
| return i; |
| } |
| |
| public static String pop() { |
| int next = getDepth(); |
| if (next == 0) { |
| return ""; |
| } |
| int last = next - 1; |
| String key = PREFIX + last; |
| String val = MDC.get(key); |
| MDC.remove(key); |
| return val; |
| } |
| |
| public static String peek() { |
| int next = getDepth(); |
| if (next == 0) { |
| return ""; |
| } |
| int last = next - 1; |
| String key = PREFIX + last; |
| String val = MDC.get(key); |
| return val; |
| } |
| |
| public static void push(String message) { |
| int next = getDepth(); |
| MDC.put(PREFIX + next, message); |
| } |
| |
| static public void remove() { |
| clear(); |
| } |
| |
| static public void setMaxDepth(int maxDepth) { |
| } |
| |
| } |