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<pre><span class="sourceLineNo">001</span><a id="line.1">/*</a>
<span class="sourceLineNo">002</span><a id="line.2"> * Licensed to the Apache Software Foundation (ASF) under one or more</a>
<span class="sourceLineNo">003</span><a id="line.3"> * contributor license agreements. See the NOTICE file distributed with</a>
<span class="sourceLineNo">004</span><a id="line.4"> * this work for additional information regarding copyright ownership.</a>
<span class="sourceLineNo">005</span><a id="line.5"> * The ASF licenses this file to You under the Apache license, Version 2.0</a>
<span class="sourceLineNo">006</span><a id="line.6"> * (the "License"); you may not use this file except in compliance with</a>
<span class="sourceLineNo">007</span><a id="line.7"> * the License. You may obtain a copy of the License at</a>
<span class="sourceLineNo">008</span><a id="line.8"> *</a>
<span class="sourceLineNo">009</span><a id="line.9"> * http://www.apache.org/licenses/LICENSE-2.0</a>
<span class="sourceLineNo">010</span><a id="line.10"> *</a>
<span class="sourceLineNo">011</span><a id="line.11"> * Unless required by applicable law or agreed to in writing, software</a>
<span class="sourceLineNo">012</span><a id="line.12"> * distributed under the License is distributed on an "AS IS" BASIS,</a>
<span class="sourceLineNo">013</span><a id="line.13"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</a>
<span class="sourceLineNo">014</span><a id="line.14"> * See the license for the specific language governing permissions and</a>
<span class="sourceLineNo">015</span><a id="line.15"> * limitations under the license.</a>
<span class="sourceLineNo">016</span><a id="line.16"> */</a>
<span class="sourceLineNo">017</span><a id="line.17"></a>
<span class="sourceLineNo">018</span><a id="line.18">package org.apache.logging.log4j.jpl;</a>
<span class="sourceLineNo">019</span><a id="line.19"></a>
<span class="sourceLineNo">020</span><a id="line.20">import java.lang.System.Logger;</a>
<span class="sourceLineNo">021</span><a id="line.21">import java.util.MissingResourceException;</a>
<span class="sourceLineNo">022</span><a id="line.22">import java.util.Objects;</a>
<span class="sourceLineNo">023</span><a id="line.23">import java.util.ResourceBundle;</a>
<span class="sourceLineNo">024</span><a id="line.24">import java.util.function.Supplier;</a>
<span class="sourceLineNo">025</span><a id="line.25"></a>
<span class="sourceLineNo">026</span><a id="line.26">import org.apache.logging.log4j.spi.ExtendedLogger;</a>
<span class="sourceLineNo">027</span><a id="line.27"></a>
<span class="sourceLineNo">028</span><a id="line.28">/**</a>
<span class="sourceLineNo">029</span><a id="line.29"> * JPL {@link Logger logger} implementation that uses Log4j.</a>
<span class="sourceLineNo">030</span><a id="line.30"> * Implement all default {@link Logger} methods to ensure proper class resolution</a>
<span class="sourceLineNo">031</span><a id="line.31"> *</a>
<span class="sourceLineNo">032</span><a id="line.32"> * @since 2.14</a>
<span class="sourceLineNo">033</span><a id="line.33"> */</a>
<span class="sourceLineNo">034</span><a id="line.34">public class Log4jSystemLogger implements Logger {</a>
<span class="sourceLineNo">035</span><a id="line.35"></a>
<span class="sourceLineNo">036</span><a id="line.36"> private final ExtendedLogger logger;</a>
<span class="sourceLineNo">037</span><a id="line.37"></a>
<span class="sourceLineNo">038</span><a id="line.38"> private static final String FQCN = Log4jSystemLogger.class.getName();</a>
<span class="sourceLineNo">039</span><a id="line.39"></a>
<span class="sourceLineNo">040</span><a id="line.40"> public Log4jSystemLogger(final ExtendedLogger logger) {</a>
<span class="sourceLineNo">041</span><a id="line.41"> this.logger = logger;</a>
<span class="sourceLineNo">042</span><a id="line.42"> }</a>
<span class="sourceLineNo">043</span><a id="line.43"></a>
<span class="sourceLineNo">044</span><a id="line.44"> @Override</a>
<span class="sourceLineNo">045</span><a id="line.45"> public String getName() {</a>
<span class="sourceLineNo">046</span><a id="line.46"> return logger.getName();</a>
<span class="sourceLineNo">047</span><a id="line.47"> }</a>
<span class="sourceLineNo">048</span><a id="line.48"></a>
<span class="sourceLineNo">049</span><a id="line.49"> @Override</a>
<span class="sourceLineNo">050</span><a id="line.50"> public boolean isLoggable(final Level level) {</a>
<span class="sourceLineNo">051</span><a id="line.51"> return logger.isEnabled(getLevel(level));</a>
<span class="sourceLineNo">052</span><a id="line.52"> }</a>
<span class="sourceLineNo">053</span><a id="line.53"></a>
<span class="sourceLineNo">054</span><a id="line.54"> @Override</a>
<span class="sourceLineNo">055</span><a id="line.55"> public void log(Level level, String msg) {</a>
<span class="sourceLineNo">056</span><a id="line.56"> log(level, (ResourceBundle) null, msg, (Object[]) null);</a>
<span class="sourceLineNo">057</span><a id="line.57"> }</a>
<span class="sourceLineNo">058</span><a id="line.58"></a>
<span class="sourceLineNo">059</span><a id="line.59"> @Override</a>
<span class="sourceLineNo">060</span><a id="line.60"> public void log(Level level, Supplier&lt;String&gt; msgSupplier) {</a>
<span class="sourceLineNo">061</span><a id="line.61"> Objects.requireNonNull(msgSupplier);</a>
<span class="sourceLineNo">062</span><a id="line.62"> if (isLoggable(Objects.requireNonNull(level))) {</a>
<span class="sourceLineNo">063</span><a id="line.63"> log(level, (ResourceBundle) null, msgSupplier.get(), (Object[]) null);</a>
<span class="sourceLineNo">064</span><a id="line.64"> }</a>
<span class="sourceLineNo">065</span><a id="line.65"> }</a>
<span class="sourceLineNo">066</span><a id="line.66"></a>
<span class="sourceLineNo">067</span><a id="line.67"> @Override</a>
<span class="sourceLineNo">068</span><a id="line.68"> public void log(Level level, Object obj) {</a>
<span class="sourceLineNo">069</span><a id="line.69"> Objects.requireNonNull(obj);</a>
<span class="sourceLineNo">070</span><a id="line.70"> if (isLoggable(Objects.requireNonNull(level))) {</a>
<span class="sourceLineNo">071</span><a id="line.71"> log(level, (ResourceBundle) null, obj.toString(), (Object[]) null);</a>
<span class="sourceLineNo">072</span><a id="line.72"> }</a>
<span class="sourceLineNo">073</span><a id="line.73"> }</a>
<span class="sourceLineNo">074</span><a id="line.74"></a>
<span class="sourceLineNo">075</span><a id="line.75"> @Override</a>
<span class="sourceLineNo">076</span><a id="line.76"> public void log(Level level, String msg, Throwable thrown) {</a>
<span class="sourceLineNo">077</span><a id="line.77"> log(level, null, msg, thrown);</a>
<span class="sourceLineNo">078</span><a id="line.78"> }</a>
<span class="sourceLineNo">079</span><a id="line.79"></a>
<span class="sourceLineNo">080</span><a id="line.80"> @Override</a>
<span class="sourceLineNo">081</span><a id="line.81"> public void log(Level level, Supplier&lt;String&gt; msgSupplier, Throwable thrown) {</a>
<span class="sourceLineNo">082</span><a id="line.82"> Objects.requireNonNull(msgSupplier);</a>
<span class="sourceLineNo">083</span><a id="line.83"> if (isLoggable(Objects.requireNonNull(level))) {</a>
<span class="sourceLineNo">084</span><a id="line.84"> log(level, null, msgSupplier.get(), thrown);</a>
<span class="sourceLineNo">085</span><a id="line.85"> }</a>
<span class="sourceLineNo">086</span><a id="line.86"> }</a>
<span class="sourceLineNo">087</span><a id="line.87"></a>
<span class="sourceLineNo">088</span><a id="line.88"> @Override</a>
<span class="sourceLineNo">089</span><a id="line.89"> public void log(Level level, String format, Object... params) {</a>
<span class="sourceLineNo">090</span><a id="line.90"> log(level, null, format, params);</a>
<span class="sourceLineNo">091</span><a id="line.91"> }</a>
<span class="sourceLineNo">092</span><a id="line.92"></a>
<span class="sourceLineNo">093</span><a id="line.93"> @Override</a>
<span class="sourceLineNo">094</span><a id="line.94"> public void log(final Level level, final ResourceBundle bundle, final String msg, final Throwable thrown) {</a>
<span class="sourceLineNo">095</span><a id="line.95"> logger.logIfEnabled(FQCN, getLevel(level), null, getResource(bundle, msg), thrown);</a>
<span class="sourceLineNo">096</span><a id="line.96"> }</a>
<span class="sourceLineNo">097</span><a id="line.97"></a>
<span class="sourceLineNo">098</span><a id="line.98"> @Override</a>
<span class="sourceLineNo">099</span><a id="line.99"> public void log(final Level level, final ResourceBundle bundle, final String format, final Object... params) {</a>
<span class="sourceLineNo">100</span><a id="line.100"> logger.logIfEnabled(FQCN, getLevel(level), null, getResource(bundle, format), params);</a>
<span class="sourceLineNo">101</span><a id="line.101"> }</a>
<span class="sourceLineNo">102</span><a id="line.102"></a>
<span class="sourceLineNo">103</span><a id="line.103"> private static org.apache.logging.log4j.Level getLevel(final Level level) {</a>
<span class="sourceLineNo">104</span><a id="line.104"> switch (level) {</a>
<span class="sourceLineNo">105</span><a id="line.105"> case OFF:</a>
<span class="sourceLineNo">106</span><a id="line.106"> return org.apache.logging.log4j.Level.OFF;</a>
<span class="sourceLineNo">107</span><a id="line.107"> case ERROR:</a>
<span class="sourceLineNo">108</span><a id="line.108"> return org.apache.logging.log4j.Level.ERROR;</a>
<span class="sourceLineNo">109</span><a id="line.109"> case WARNING:</a>
<span class="sourceLineNo">110</span><a id="line.110"> return org.apache.logging.log4j.Level.WARN;</a>
<span class="sourceLineNo">111</span><a id="line.111"> case INFO:</a>
<span class="sourceLineNo">112</span><a id="line.112"> return org.apache.logging.log4j.Level.INFO;</a>
<span class="sourceLineNo">113</span><a id="line.113"> case DEBUG:</a>
<span class="sourceLineNo">114</span><a id="line.114"> return org.apache.logging.log4j.Level.DEBUG;</a>
<span class="sourceLineNo">115</span><a id="line.115"> case TRACE:</a>
<span class="sourceLineNo">116</span><a id="line.116"> return org.apache.logging.log4j.Level.TRACE;</a>
<span class="sourceLineNo">117</span><a id="line.117"> case ALL:</a>
<span class="sourceLineNo">118</span><a id="line.118"> return org.apache.logging.log4j.Level.ALL;</a>
<span class="sourceLineNo">119</span><a id="line.119"> }</a>
<span class="sourceLineNo">120</span><a id="line.120"> return org.apache.logging.log4j.Level.ERROR;</a>
<span class="sourceLineNo">121</span><a id="line.121"> }</a>
<span class="sourceLineNo">122</span><a id="line.122"></a>
<span class="sourceLineNo">123</span><a id="line.123"> private static String getResource(ResourceBundle bundle, String msg) {</a>
<span class="sourceLineNo">124</span><a id="line.124"> if (bundle == null || msg == null) {</a>
<span class="sourceLineNo">125</span><a id="line.125"> return msg;</a>
<span class="sourceLineNo">126</span><a id="line.126"> }</a>
<span class="sourceLineNo">127</span><a id="line.127"> try {</a>
<span class="sourceLineNo">128</span><a id="line.128"> return bundle.getString(msg);</a>
<span class="sourceLineNo">129</span><a id="line.129"> } catch (MissingResourceException e) {</a>
<span class="sourceLineNo">130</span><a id="line.130"> // ignore</a>
<span class="sourceLineNo">131</span><a id="line.131"> return msg;</a>
<span class="sourceLineNo">132</span><a id="line.132"> } catch (ClassCastException ex) {</a>
<span class="sourceLineNo">133</span><a id="line.133"> return bundle.getObject(msg).toString();</a>
<span class="sourceLineNo">134</span><a id="line.134"> }</a>
<span class="sourceLineNo">135</span><a id="line.135"> }</a>
<span class="sourceLineNo">136</span><a id="line.136">}</a>
</pre>
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