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<FONT color="green">001</FONT> /*<a name="line.1"></a>
<FONT color="green">002</FONT> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT> * The ASF licenses this file to You under the Apache license, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT> * the License. You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT> *<a name="line.8"></a>
<FONT color="green">009</FONT> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT> *<a name="line.10"></a>
<FONT color="green">011</FONT> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT> * See the license for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT> * limitations under the license.<a name="line.15"></a>
<FONT color="green">016</FONT> */<a name="line.16"></a>
<FONT color="green">017</FONT> package org.apache.logging.log4j.core.impl;<a name="line.17"></a>
<FONT color="green">018</FONT> <a name="line.18"></a>
<FONT color="green">019</FONT> import org.apache.logging.log4j.core.LoggerContext;<a name="line.19"></a>
<FONT color="green">020</FONT> import org.apache.logging.log4j.core.helpers.Constants;<a name="line.20"></a>
<FONT color="green">021</FONT> import org.apache.logging.log4j.core.helpers.Loader;<a name="line.21"></a>
<FONT color="green">022</FONT> import org.apache.logging.log4j.core.selector.ClassLoaderContextSelector;<a name="line.22"></a>
<FONT color="green">023</FONT> import org.apache.logging.log4j.core.selector.ContextSelector;<a name="line.23"></a>
<FONT color="green">024</FONT> import org.apache.logging.log4j.status.StatusLogger;<a name="line.24"></a>
<FONT color="green">025</FONT> import org.apache.logging.log4j.spi.LoggerContextFactory;<a name="line.25"></a>
<FONT color="green">026</FONT> <a name="line.26"></a>
<FONT color="green">027</FONT> /**<a name="line.27"></a>
<FONT color="green">028</FONT> * Factory to locate a ContextSelector and then load a LoggerContext.<a name="line.28"></a>
<FONT color="green">029</FONT> */<a name="line.29"></a>
<FONT color="green">030</FONT> public class Log4jContextFactory implements LoggerContextFactory {<a name="line.30"></a>
<FONT color="green">031</FONT> <a name="line.31"></a>
<FONT color="green">032</FONT> private ContextSelector selector;<a name="line.32"></a>
<FONT color="green">033</FONT> <a name="line.33"></a>
<FONT color="green">034</FONT> private StatusLogger logger = StatusLogger.getLogger();<a name="line.34"></a>
<FONT color="green">035</FONT> <a name="line.35"></a>
<FONT color="green">036</FONT> private ThreadLocal&lt;Log4jContextFactory&gt; recursive = new ThreadLocal&lt;Log4jContextFactory&gt;();<a name="line.36"></a>
<FONT color="green">037</FONT> <a name="line.37"></a>
<FONT color="green">038</FONT> /**<a name="line.38"></a>
<FONT color="green">039</FONT> * Constructor that initializes the ContextSelector.<a name="line.39"></a>
<FONT color="green">040</FONT> */<a name="line.40"></a>
<FONT color="green">041</FONT> public Log4jContextFactory() {<a name="line.41"></a>
<FONT color="green">042</FONT> String sel = System.getProperty(Constants.LOG4J_CONTEXT_SELECTOR);<a name="line.42"></a>
<FONT color="green">043</FONT> if (sel != null) {<a name="line.43"></a>
<FONT color="green">044</FONT> try {<a name="line.44"></a>
<FONT color="green">045</FONT> Class clazz = Loader.loadClass(sel);<a name="line.45"></a>
<FONT color="green">046</FONT> if (clazz != null &amp;&amp; ContextSelector.class.isAssignableFrom(clazz)) {<a name="line.46"></a>
<FONT color="green">047</FONT> selector = (ContextSelector) clazz.newInstance();<a name="line.47"></a>
<FONT color="green">048</FONT> return;<a name="line.48"></a>
<FONT color="green">049</FONT> }<a name="line.49"></a>
<FONT color="green">050</FONT> } catch (Exception ex) {<a name="line.50"></a>
<FONT color="green">051</FONT> logger.error("Unable to create context " + sel, ex);<a name="line.51"></a>
<FONT color="green">052</FONT> }<a name="line.52"></a>
<FONT color="green">053</FONT> <a name="line.53"></a>
<FONT color="green">054</FONT> }<a name="line.54"></a>
<FONT color="green">055</FONT> selector = new ClassLoaderContextSelector();<a name="line.55"></a>
<FONT color="green">056</FONT> }<a name="line.56"></a>
<FONT color="green">057</FONT> <a name="line.57"></a>
<FONT color="green">058</FONT> /**<a name="line.58"></a>
<FONT color="green">059</FONT> * Return the ContextSelector.<a name="line.59"></a>
<FONT color="green">060</FONT> * @return The ContextSelector.<a name="line.60"></a>
<FONT color="green">061</FONT> */<a name="line.61"></a>
<FONT color="green">062</FONT> public ContextSelector getSelector() {<a name="line.62"></a>
<FONT color="green">063</FONT> return selector;<a name="line.63"></a>
<FONT color="green">064</FONT> }<a name="line.64"></a>
<FONT color="green">065</FONT> <a name="line.65"></a>
<FONT color="green">066</FONT> /**<a name="line.66"></a>
<FONT color="green">067</FONT> * Load the LoggerContext using the ContextSelector.<a name="line.67"></a>
<FONT color="green">068</FONT> * @param fqcn The fully qualified class name of the caller.<a name="line.68"></a>
<FONT color="green">069</FONT> * @param currentContext If true returns the current Context, if false returns the Context appropriate<a name="line.69"></a>
<FONT color="green">070</FONT> * for the caller if a more appropriate Context can be determined.<a name="line.70"></a>
<FONT color="green">071</FONT> * @return The LoggerContext.<a name="line.71"></a>
<FONT color="green">072</FONT> */<a name="line.72"></a>
<FONT color="green">073</FONT> public LoggerContext getContext(String fqcn, boolean currentContext) {<a name="line.73"></a>
<FONT color="green">074</FONT> LoggerContext ctx = selector.getContext(fqcn, currentContext);<a name="line.74"></a>
<FONT color="green">075</FONT> synchronized (ctx) {<a name="line.75"></a>
<FONT color="green">076</FONT> if (recursive.get() != null || ctx.isStarted()) {<a name="line.76"></a>
<FONT color="green">077</FONT> return ctx;<a name="line.77"></a>
<FONT color="green">078</FONT> }<a name="line.78"></a>
<FONT color="green">079</FONT> try {<a name="line.79"></a>
<FONT color="green">080</FONT> recursive.set(this);<a name="line.80"></a>
<FONT color="green">081</FONT> ctx.start();<a name="line.81"></a>
<FONT color="green">082</FONT> return ctx;<a name="line.82"></a>
<FONT color="green">083</FONT> } finally {<a name="line.83"></a>
<FONT color="green">084</FONT> recursive.remove();<a name="line.84"></a>
<FONT color="green">085</FONT> }<a name="line.85"></a>
<FONT color="green">086</FONT> }<a name="line.86"></a>
<FONT color="green">087</FONT> }<a name="line.87"></a>
<FONT color="green">088</FONT> }<a name="line.88"></a>
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