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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><a name="line.17"></a> |
| <span class="sourceLineNo">018</span>package org.apache.logging.log4j.core.async;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import java.util.regex.Matcher;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import java.util.regex.Pattern;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.apache.logging.log4j.status.StatusLogger;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import org.apache.logging.log4j.util.Constants;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import org.apache.logging.log4j.util.PropertiesUtil;<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> * Strategy for deciding whether thread name should be cached or not.<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> */<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>public enum ThreadNameCachingStrategy { // LOG4J2-467<a name="line.30"></a> |
| <span class="sourceLineNo">031</span> CACHED {<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> @Override<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> public String getThreadName() {<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> String result = THREADLOCAL_NAME.get();<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> if (result == null) {<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> result = Thread.currentThread().getName();<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> THREADLOCAL_NAME.set(result);<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> }<a name="line.38"></a> |
| <span class="sourceLineNo">039</span> return result;<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> UNCACHED {<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> @Override<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public String getThreadName() {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> return Thread.currentThread().getName();<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> private static final StatusLogger LOGGER = StatusLogger.getLogger();<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> private static final ThreadLocal<String> THREADLOCAL_NAME = new ThreadLocal<>();<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> static final ThreadNameCachingStrategy DEFAULT_STRATEGY = isAllocatingThreadGetName() ? CACHED : UNCACHED;<a name="line.51"></a> |
| <span class="sourceLineNo">052</span><a name="line.52"></a> |
| <span class="sourceLineNo">053</span> abstract String getThreadName();<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> public static ThreadNameCachingStrategy create() {<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> final String name = PropertiesUtil.getProperties().getStringProperty("AsyncLogger.ThreadNameStrategy");<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> try {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> final ThreadNameCachingStrategy result = name != null ? ThreadNameCachingStrategy.valueOf(name) : DEFAULT_STRATEGY;<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> LOGGER.debug("AsyncLogger.ThreadNameStrategy={} (user specified {}, default is {})",<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> result.name(), name, DEFAULT_STRATEGY.name());<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> return result;<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> } catch (final Exception ex) {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> LOGGER.debug("Using AsyncLogger.ThreadNameStrategy.{}: '{}' not valid: {}",<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> DEFAULT_STRATEGY.name(), name, ex.toString());<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> return DEFAULT_STRATEGY;<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> }<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> }<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> static boolean isAllocatingThreadGetName() {<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> // LOG4J2-2052, LOG4J2-2635 JDK 8u102 ("1.8.0_102") removed the String allocation in Thread.getName()<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> if (Constants.JAVA_MAJOR_VERSION == 8) {<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> try {<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> Pattern javaVersionPattern = Pattern.compile("(\\d+)\\.(\\d+)\\.(\\d+)_(\\d+)");<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> Matcher m = javaVersionPattern.matcher(System.getProperty("java.version"));<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> if (m.matches()) {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> return Integer.parseInt(m.group(3)) == 0 && Integer.parseInt(m.group(4)) < 102;<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> }<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> return true;<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> } catch (Exception e) {<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> return true;<a name="line.80"></a> |
| <span class="sourceLineNo">081</span> }<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> } else {<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> return Constants.JAVA_MAJOR_VERSION < 8;<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> }<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span>}<a name="line.86"></a> |
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