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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;<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.config.Configuration;<a name="line.19"></a>
<FONT color="green">020</FONT>    import org.apache.logging.log4j.core.config.ConfigurationFactory;<a name="line.20"></a>
<FONT color="green">021</FONT>    import org.apache.logging.log4j.core.config.ConfigurationListener;<a name="line.21"></a>
<FONT color="green">022</FONT>    import org.apache.logging.log4j.core.config.DefaultConfiguration;<a name="line.22"></a>
<FONT color="green">023</FONT>    import org.apache.logging.log4j.core.config.NullConfiguration;<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>    <a name="line.25"></a>
<FONT color="green">026</FONT>    import java.io.File;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.net.URI;<a name="line.27"></a>
<FONT color="green">028</FONT>    import java.util.concurrent.ConcurrentHashMap;<a name="line.28"></a>
<FONT color="green">029</FONT>    import java.util.concurrent.ConcurrentMap;<a name="line.29"></a>
<FONT color="green">030</FONT>    <a name="line.30"></a>
<FONT color="green">031</FONT>    /**<a name="line.31"></a>
<FONT color="green">032</FONT>     * The LoggerContext is the anchor for the logging system. It maintains a list of all the loggers requested by<a name="line.32"></a>
<FONT color="green">033</FONT>     * applications and a reference to the Configuration. The Configuration will contain the configured loggers, appenders,<a name="line.33"></a>
<FONT color="green">034</FONT>     * filters, etc and will be atomically updated whenever a reconfigure occurs.<a name="line.34"></a>
<FONT color="green">035</FONT>     */<a name="line.35"></a>
<FONT color="green">036</FONT>    public class LoggerContext implements org.apache.logging.log4j.spi.LoggerContext, ConfigurationListener, Lifecycle {<a name="line.36"></a>
<FONT color="green">037</FONT>    <a name="line.37"></a>
<FONT color="green">038</FONT>        private static StatusLogger logger = StatusLogger.getLogger();<a name="line.38"></a>
<FONT color="green">039</FONT>    <a name="line.39"></a>
<FONT color="green">040</FONT>        private final ConcurrentMap&lt;String, Logger&gt; loggers = new ConcurrentHashMap&lt;String, Logger&gt;();<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>        /**<a name="line.42"></a>
<FONT color="green">043</FONT>         * The Configuration is volatile to guarantee that initialization of the Configuration has completed before<a name="line.43"></a>
<FONT color="green">044</FONT>         * the reference is updated.<a name="line.44"></a>
<FONT color="green">045</FONT>         */<a name="line.45"></a>
<FONT color="green">046</FONT>        private volatile Configuration config = new DefaultConfiguration();<a name="line.46"></a>
<FONT color="green">047</FONT>    <a name="line.47"></a>
<FONT color="green">048</FONT>        private Object externalContext = null;<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>        private final String contextName;<a name="line.50"></a>
<FONT color="green">051</FONT>    <a name="line.51"></a>
<FONT color="green">052</FONT>        private final URI configLocation;<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>        private boolean isStarted;<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>        /**<a name="line.56"></a>
<FONT color="green">057</FONT>         * Constructor taking only a name.<a name="line.57"></a>
<FONT color="green">058</FONT>         * @param name The context name.<a name="line.58"></a>
<FONT color="green">059</FONT>         */<a name="line.59"></a>
<FONT color="green">060</FONT>        public LoggerContext(String name) {<a name="line.60"></a>
<FONT color="green">061</FONT>            this(name, null, (URI) null);<a name="line.61"></a>
<FONT color="green">062</FONT>        }<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>        /**<a name="line.64"></a>
<FONT color="green">065</FONT>         * Constructor taking a name and a reference to an external context.<a name="line.65"></a>
<FONT color="green">066</FONT>         * @param name The context name.<a name="line.66"></a>
<FONT color="green">067</FONT>         * @param externalContext The external context.<a name="line.67"></a>
<FONT color="green">068</FONT>         */<a name="line.68"></a>
<FONT color="green">069</FONT>        public LoggerContext(String name, Object externalContext) {<a name="line.69"></a>
<FONT color="green">070</FONT>            this(name, externalContext, (URI) null);<a name="line.70"></a>
<FONT color="green">071</FONT>        }<a name="line.71"></a>
<FONT color="green">072</FONT>    <a name="line.72"></a>
<FONT color="green">073</FONT>        /**<a name="line.73"></a>
<FONT color="green">074</FONT>         * Constructor taking a name, external context and a configuration URI.<a name="line.74"></a>
<FONT color="green">075</FONT>         * @param name The context name.<a name="line.75"></a>
<FONT color="green">076</FONT>         * @param externalContext The external context.<a name="line.76"></a>
<FONT color="green">077</FONT>         * @param configLocn The location of the configuration as a URI.<a name="line.77"></a>
<FONT color="green">078</FONT>         */<a name="line.78"></a>
<FONT color="green">079</FONT>        public LoggerContext(String name, Object externalContext, URI configLocn) {<a name="line.79"></a>
<FONT color="green">080</FONT>            contextName = name;<a name="line.80"></a>
<FONT color="green">081</FONT>            this.externalContext = externalContext;<a name="line.81"></a>
<FONT color="green">082</FONT>            this.configLocation = configLocn;<a name="line.82"></a>
<FONT color="green">083</FONT>        }<a name="line.83"></a>
<FONT color="green">084</FONT>    <a name="line.84"></a>
<FONT color="green">085</FONT>        /**<a name="line.85"></a>
<FONT color="green">086</FONT>         * Constructor taking a name external context and a configuration location String. The location<a name="line.86"></a>
<FONT color="green">087</FONT>         * must be resolvable to a File.<a name="line.87"></a>
<FONT color="green">088</FONT>         * @param name The configuration location.<a name="line.88"></a>
<FONT color="green">089</FONT>         * @param externalContext The external context.<a name="line.89"></a>
<FONT color="green">090</FONT>         * @param configLocn The configuration location.<a name="line.90"></a>
<FONT color="green">091</FONT>         */<a name="line.91"></a>
<FONT color="green">092</FONT>        public LoggerContext(String name, Object externalContext, String configLocn) {<a name="line.92"></a>
<FONT color="green">093</FONT>            contextName = name;<a name="line.93"></a>
<FONT color="green">094</FONT>            this.externalContext = externalContext;<a name="line.94"></a>
<FONT color="green">095</FONT>            if (configLocn != null) {<a name="line.95"></a>
<FONT color="green">096</FONT>                URI uri;<a name="line.96"></a>
<FONT color="green">097</FONT>                try {<a name="line.97"></a>
<FONT color="green">098</FONT>                    uri = new File(configLocn).toURI();<a name="line.98"></a>
<FONT color="green">099</FONT>                } catch (Exception ex) {<a name="line.99"></a>
<FONT color="green">100</FONT>                    uri = null;<a name="line.100"></a>
<FONT color="green">101</FONT>                }<a name="line.101"></a>
<FONT color="green">102</FONT>                configLocation = uri;<a name="line.102"></a>
<FONT color="green">103</FONT>            } else {<a name="line.103"></a>
<FONT color="green">104</FONT>                configLocation = null;<a name="line.104"></a>
<FONT color="green">105</FONT>            }<a name="line.105"></a>
<FONT color="green">106</FONT>        }<a name="line.106"></a>
<FONT color="green">107</FONT>    <a name="line.107"></a>
<FONT color="green">108</FONT>        public void start() {<a name="line.108"></a>
<FONT color="green">109</FONT>            reconfigure();<a name="line.109"></a>
<FONT color="green">110</FONT>            isStarted = true;<a name="line.110"></a>
<FONT color="green">111</FONT>        }<a name="line.111"></a>
<FONT color="green">112</FONT>    <a name="line.112"></a>
<FONT color="green">113</FONT>        public synchronized void stop() {<a name="line.113"></a>
<FONT color="green">114</FONT>            isStarted = false;<a name="line.114"></a>
<FONT color="green">115</FONT>            updateLoggers(new NullConfiguration());<a name="line.115"></a>
<FONT color="green">116</FONT>            config.stop();<a name="line.116"></a>
<FONT color="green">117</FONT>            externalContext = null;<a name="line.117"></a>
<FONT color="green">118</FONT>        }<a name="line.118"></a>
<FONT color="green">119</FONT>    <a name="line.119"></a>
<FONT color="green">120</FONT>        public boolean isStarted() {<a name="line.120"></a>
<FONT color="green">121</FONT>            return isStarted;<a name="line.121"></a>
<FONT color="green">122</FONT>        }<a name="line.122"></a>
<FONT color="green">123</FONT>    <a name="line.123"></a>
<FONT color="green">124</FONT>        /**<a name="line.124"></a>
<FONT color="green">125</FONT>         * Set the external context.<a name="line.125"></a>
<FONT color="green">126</FONT>         * @param context The external context.<a name="line.126"></a>
<FONT color="green">127</FONT>         */<a name="line.127"></a>
<FONT color="green">128</FONT>        public void setExternalContext(Object context) {<a name="line.128"></a>
<FONT color="green">129</FONT>            this.externalContext = context;<a name="line.129"></a>
<FONT color="green">130</FONT>        }<a name="line.130"></a>
<FONT color="green">131</FONT>    <a name="line.131"></a>
<FONT color="green">132</FONT>        /**<a name="line.132"></a>
<FONT color="green">133</FONT>         * Return the external context.<a name="line.133"></a>
<FONT color="green">134</FONT>         * @return The external context.<a name="line.134"></a>
<FONT color="green">135</FONT>         */<a name="line.135"></a>
<FONT color="green">136</FONT>        public Object getExternalContext() {<a name="line.136"></a>
<FONT color="green">137</FONT>            return this.externalContext;<a name="line.137"></a>
<FONT color="green">138</FONT>        }<a name="line.138"></a>
<FONT color="green">139</FONT>    <a name="line.139"></a>
<FONT color="green">140</FONT>        /**<a name="line.140"></a>
<FONT color="green">141</FONT>         * Obtain a Logger from the Context.<a name="line.141"></a>
<FONT color="green">142</FONT>         * @param name The name of the Logger to return.<a name="line.142"></a>
<FONT color="green">143</FONT>         * @return The Logger.<a name="line.143"></a>
<FONT color="green">144</FONT>         */<a name="line.144"></a>
<FONT color="green">145</FONT>        public Logger getLogger(String name) {<a name="line.145"></a>
<FONT color="green">146</FONT>    <a name="line.146"></a>
<FONT color="green">147</FONT>            Logger logger = loggers.get(name);<a name="line.147"></a>
<FONT color="green">148</FONT>            if (logger != null) {<a name="line.148"></a>
<FONT color="green">149</FONT>                return logger;<a name="line.149"></a>
<FONT color="green">150</FONT>            }<a name="line.150"></a>
<FONT color="green">151</FONT>    <a name="line.151"></a>
<FONT color="green">152</FONT>            logger = (Logger) newInstance(this, name);<a name="line.152"></a>
<FONT color="green">153</FONT>            Logger prev = loggers.putIfAbsent(name, logger);<a name="line.153"></a>
<FONT color="green">154</FONT>            return prev == null ? logger : prev;<a name="line.154"></a>
<FONT color="green">155</FONT>        }<a name="line.155"></a>
<FONT color="green">156</FONT>    <a name="line.156"></a>
<FONT color="green">157</FONT>        /**<a name="line.157"></a>
<FONT color="green">158</FONT>         * Determine if the specified Logger exists.<a name="line.158"></a>
<FONT color="green">159</FONT>         * @param name The Logger name to search for.<a name="line.159"></a>
<FONT color="green">160</FONT>         * @return True if the Logger exists, false otherwise.<a name="line.160"></a>
<FONT color="green">161</FONT>         */<a name="line.161"></a>
<FONT color="green">162</FONT>        public boolean hasLogger(String name) {<a name="line.162"></a>
<FONT color="green">163</FONT>            return loggers.containsKey(name);<a name="line.163"></a>
<FONT color="green">164</FONT>        }<a name="line.164"></a>
<FONT color="green">165</FONT>    <a name="line.165"></a>
<FONT color="green">166</FONT>        /**<a name="line.166"></a>
<FONT color="green">167</FONT>         * Return the current Configuration. The Configuration will be replaced when a reconfigure occurs.<a name="line.167"></a>
<FONT color="green">168</FONT>         * @return The Configuration.<a name="line.168"></a>
<FONT color="green">169</FONT>         */<a name="line.169"></a>
<FONT color="green">170</FONT>        public Configuration getConfiguration() {<a name="line.170"></a>
<FONT color="green">171</FONT>            return config;<a name="line.171"></a>
<FONT color="green">172</FONT>        }<a name="line.172"></a>
<FONT color="green">173</FONT>    <a name="line.173"></a>
<FONT color="green">174</FONT>        /**<a name="line.174"></a>
<FONT color="green">175</FONT>         * Add a Filter to the Configuration. Filters that are added through the API will be lost<a name="line.175"></a>
<FONT color="green">176</FONT>         * when a reconfigure occurs.<a name="line.176"></a>
<FONT color="green">177</FONT>         * @param filter The Filter to add.<a name="line.177"></a>
<FONT color="green">178</FONT>         */<a name="line.178"></a>
<FONT color="green">179</FONT>        public void addFilter(Filter filter) {<a name="line.179"></a>
<FONT color="green">180</FONT>            config.addFilter(filter);<a name="line.180"></a>
<FONT color="green">181</FONT>        }<a name="line.181"></a>
<FONT color="green">182</FONT>    <a name="line.182"></a>
<FONT color="green">183</FONT>        /**<a name="line.183"></a>
<FONT color="green">184</FONT>         * Removes a Filter from the current Configuration.<a name="line.184"></a>
<FONT color="green">185</FONT>         * @param filter The Filter to remove.<a name="line.185"></a>
<FONT color="green">186</FONT>         */<a name="line.186"></a>
<FONT color="green">187</FONT>        public void removeFiler(Filter filter) {<a name="line.187"></a>
<FONT color="green">188</FONT>            config.removeFilter(filter);<a name="line.188"></a>
<FONT color="green">189</FONT>        }<a name="line.189"></a>
<FONT color="green">190</FONT>    <a name="line.190"></a>
<FONT color="green">191</FONT>        /**<a name="line.191"></a>
<FONT color="green">192</FONT>         * Set the Configuration to be used.<a name="line.192"></a>
<FONT color="green">193</FONT>         * @param config The new Configuration.<a name="line.193"></a>
<FONT color="green">194</FONT>         * @return The previous Configuration.<a name="line.194"></a>
<FONT color="green">195</FONT>         */<a name="line.195"></a>
<FONT color="green">196</FONT>        public synchronized Configuration setConfiguration(Configuration config) {<a name="line.196"></a>
<FONT color="green">197</FONT>            if (config == null) {<a name="line.197"></a>
<FONT color="green">198</FONT>                throw new NullPointerException("No Configuration was provided");<a name="line.198"></a>
<FONT color="green">199</FONT>            }<a name="line.199"></a>
<FONT color="green">200</FONT>            Configuration prev = this.config;<a name="line.200"></a>
<FONT color="green">201</FONT>            config.addListener(this);<a name="line.201"></a>
<FONT color="green">202</FONT>            config.start();<a name="line.202"></a>
<FONT color="green">203</FONT>            this.config = config;<a name="line.203"></a>
<FONT color="green">204</FONT>            updateLoggers();<a name="line.204"></a>
<FONT color="green">205</FONT>            if (prev != null) {<a name="line.205"></a>
<FONT color="green">206</FONT>                prev.removeListener(this);<a name="line.206"></a>
<FONT color="green">207</FONT>                prev.stop();<a name="line.207"></a>
<FONT color="green">208</FONT>            }<a name="line.208"></a>
<FONT color="green">209</FONT>            return prev;<a name="line.209"></a>
<FONT color="green">210</FONT>        }<a name="line.210"></a>
<FONT color="green">211</FONT>    <a name="line.211"></a>
<FONT color="green">212</FONT>        /**<a name="line.212"></a>
<FONT color="green">213</FONT>         *  Reconfigure the context.<a name="line.213"></a>
<FONT color="green">214</FONT>         */<a name="line.214"></a>
<FONT color="green">215</FONT>        public synchronized void reconfigure() {<a name="line.215"></a>
<FONT color="green">216</FONT>            logger.debug("Reconfiguration started for context " + contextName);<a name="line.216"></a>
<FONT color="green">217</FONT>            Configuration instance = ConfigurationFactory.getInstance().getConfiguration(contextName, configLocation);<a name="line.217"></a>
<FONT color="green">218</FONT>            setConfiguration(instance);<a name="line.218"></a>
<FONT color="green">219</FONT>            /*instance.start();<a name="line.219"></a>
<FONT color="green">220</FONT>            Configuration old = setConfiguration(instance);<a name="line.220"></a>
<FONT color="green">221</FONT>            updateLoggers();<a name="line.221"></a>
<FONT color="green">222</FONT>            if (old != null) {<a name="line.222"></a>
<FONT color="green">223</FONT>                old.stop();<a name="line.223"></a>
<FONT color="green">224</FONT>            } */<a name="line.224"></a>
<FONT color="green">225</FONT>            logger.debug("Reconfiguration completed");<a name="line.225"></a>
<FONT color="green">226</FONT>        }<a name="line.226"></a>
<FONT color="green">227</FONT>    <a name="line.227"></a>
<FONT color="green">228</FONT>        /**<a name="line.228"></a>
<FONT color="green">229</FONT>         * Cause all Loggers to be updated against the current Configuration.<a name="line.229"></a>
<FONT color="green">230</FONT>         */<a name="line.230"></a>
<FONT color="green">231</FONT>        public void updateLoggers() {<a name="line.231"></a>
<FONT color="green">232</FONT>            updateLoggers(this.config);<a name="line.232"></a>
<FONT color="green">233</FONT>        }<a name="line.233"></a>
<FONT color="green">234</FONT>    <a name="line.234"></a>
<FONT color="green">235</FONT>        /**<a name="line.235"></a>
<FONT color="green">236</FONT>         * Cause all Logger to be updated against the specified Configuration.<a name="line.236"></a>
<FONT color="green">237</FONT>         * @param config The Configuration.<a name="line.237"></a>
<FONT color="green">238</FONT>         */<a name="line.238"></a>
<FONT color="green">239</FONT>        public void updateLoggers(Configuration config) {<a name="line.239"></a>
<FONT color="green">240</FONT>            for (Logger logger : loggers.values()) {<a name="line.240"></a>
<FONT color="green">241</FONT>                logger.updateConfiguration(config);<a name="line.241"></a>
<FONT color="green">242</FONT>            }<a name="line.242"></a>
<FONT color="green">243</FONT>        }<a name="line.243"></a>
<FONT color="green">244</FONT>    <a name="line.244"></a>
<FONT color="green">245</FONT>        /**<a name="line.245"></a>
<FONT color="green">246</FONT>         * Cause a reconfiguration to take place when the underlying configuration file changes.<a name="line.246"></a>
<FONT color="green">247</FONT>         */<a name="line.247"></a>
<FONT color="green">248</FONT>        public void onChange() {<a name="line.248"></a>
<FONT color="green">249</FONT>            reconfigure();<a name="line.249"></a>
<FONT color="green">250</FONT>        }<a name="line.250"></a>
<FONT color="green">251</FONT>    <a name="line.251"></a>
<FONT color="green">252</FONT>    <a name="line.252"></a>
<FONT color="green">253</FONT>        private Logger newInstance(LoggerContext ctx, String name) {<a name="line.253"></a>
<FONT color="green">254</FONT>            return new Logger(ctx, name);<a name="line.254"></a>
<FONT color="green">255</FONT>        }<a name="line.255"></a>
<FONT color="green">256</FONT>    }<a name="line.256"></a>


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