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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache license, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License. You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the license for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the license.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.apache.logging.slf4j;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.Map;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.Map.Entry;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.apache.logging.log4j.spi.CleanableThreadContextMap;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.apache.logging.log4j.util.SortedArrayStringMap;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.apache.logging.log4j.util.StringMap;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.slf4j.MDC;<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>/**<a name="line.27"></a>
<span class="sourceLineNo">028</span> * Bind the ThreadContextMap to the SLF4J MDC.<a name="line.28"></a>
<span class="sourceLineNo">029</span> */<a name="line.29"></a>
<span class="sourceLineNo">030</span>public class MDCContextMap implements CleanableThreadContextMap {<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span> private static final StringMap EMPTY_CONTEXT_DATA = new SortedArrayStringMap(1);<a name="line.32"></a>
<span class="sourceLineNo">033</span> static {<a name="line.33"></a>
<span class="sourceLineNo">034</span> EMPTY_CONTEXT_DATA.freeze();<a name="line.34"></a>
<span class="sourceLineNo">035</span> }<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span> @Override<a name="line.37"></a>
<span class="sourceLineNo">038</span> public void put(final String key, final String value) {<a name="line.38"></a>
<span class="sourceLineNo">039</span> MDC.put(key, value);<a name="line.39"></a>
<span class="sourceLineNo">040</span> }<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span> @Override<a name="line.42"></a>
<span class="sourceLineNo">043</span> public void putAll(final Map&lt;String, String&gt; m) {<a name="line.43"></a>
<span class="sourceLineNo">044</span> for (final Entry&lt;String, String&gt; entry : m.entrySet()) {<a name="line.44"></a>
<span class="sourceLineNo">045</span> MDC.put(entry.getKey(), entry.getValue());<a name="line.45"></a>
<span class="sourceLineNo">046</span> }<a name="line.46"></a>
<span class="sourceLineNo">047</span> }<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span> @Override<a name="line.49"></a>
<span class="sourceLineNo">050</span> public String get(final String key) {<a name="line.50"></a>
<span class="sourceLineNo">051</span> return MDC.get(key);<a name="line.51"></a>
<span class="sourceLineNo">052</span> }<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span> @Override<a name="line.54"></a>
<span class="sourceLineNo">055</span> public void remove(final String key) {<a name="line.55"></a>
<span class="sourceLineNo">056</span> MDC.remove(key);<a name="line.56"></a>
<span class="sourceLineNo">057</span> }<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> @Override<a name="line.60"></a>
<span class="sourceLineNo">061</span> public void removeAll(final Iterable&lt;String&gt; keys) {<a name="line.61"></a>
<span class="sourceLineNo">062</span> for (final String key : keys) {<a name="line.62"></a>
<span class="sourceLineNo">063</span> MDC.remove(key);<a name="line.63"></a>
<span class="sourceLineNo">064</span> }<a name="line.64"></a>
<span class="sourceLineNo">065</span> }<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span> @Override<a name="line.67"></a>
<span class="sourceLineNo">068</span> public void clear() {<a name="line.68"></a>
<span class="sourceLineNo">069</span> MDC.clear();<a name="line.69"></a>
<span class="sourceLineNo">070</span> }<a name="line.70"></a>
<span class="sourceLineNo">071</span><a name="line.71"></a>
<span class="sourceLineNo">072</span> @Override<a name="line.72"></a>
<span class="sourceLineNo">073</span> public boolean containsKey(final String key) {<a name="line.73"></a>
<span class="sourceLineNo">074</span> return MDC.getCopyOfContextMap().containsKey(key);<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span> @Override<a name="line.77"></a>
<span class="sourceLineNo">078</span> @SuppressWarnings("unchecked") // nothing we can do about this, restricted by SLF4J API<a name="line.78"></a>
<span class="sourceLineNo">079</span> public Map&lt;String, String&gt; getCopy() {<a name="line.79"></a>
<span class="sourceLineNo">080</span> return MDC.getCopyOfContextMap();<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> @Override<a name="line.83"></a>
<span class="sourceLineNo">084</span> @SuppressWarnings("unchecked") // nothing we can do about this, restricted by SLF4J API<a name="line.84"></a>
<span class="sourceLineNo">085</span> public Map&lt;String, String&gt; getImmutableMapOrNull() {<a name="line.85"></a>
<span class="sourceLineNo">086</span> return MDC.getCopyOfContextMap();<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span><a name="line.88"></a>
<span class="sourceLineNo">089</span> @Override<a name="line.89"></a>
<span class="sourceLineNo">090</span> public boolean isEmpty() {<a name="line.90"></a>
<span class="sourceLineNo">091</span> return MDC.getCopyOfContextMap().isEmpty();<a name="line.91"></a>
<span class="sourceLineNo">092</span> }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span> @Override<a name="line.94"></a>
<span class="sourceLineNo">095</span> public StringMap getReadOnlyContextData() {<a name="line.95"></a>
<span class="sourceLineNo">096</span> final Map&lt;String, String&gt; copy = getCopy();<a name="line.96"></a>
<span class="sourceLineNo">097</span> if (copy.isEmpty()) {<a name="line.97"></a>
<span class="sourceLineNo">098</span> return EMPTY_CONTEXT_DATA;<a name="line.98"></a>
<span class="sourceLineNo">099</span> }<a name="line.99"></a>
<span class="sourceLineNo">100</span> final StringMap result = new SortedArrayStringMap();<a name="line.100"></a>
<span class="sourceLineNo">101</span> for (final Entry&lt;String, String&gt; entry : copy.entrySet()) {<a name="line.101"></a>
<span class="sourceLineNo">102</span> result.putValue(entry.getKey(), entry.getValue());<a name="line.102"></a>
<span class="sourceLineNo">103</span> }<a name="line.103"></a>
<span class="sourceLineNo">104</span> return result;<a name="line.104"></a>
<span class="sourceLineNo">105</span> }<a name="line.105"></a>
<span class="sourceLineNo">106</span>}<a name="line.106"></a>
</pre>
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