Google Git
Sign in
apache / logging-log4j-site / 9755b12b39efbc0142688f9b1a11ec68db89f97b / . / 2.13.2 / log4j-core / apidocs / src-html / org / apache / logging / log4j / core / pattern / MessagePatternConverter.html
blob: 1f89b37fd301f4c888b4c020e3b71e916fa3936d [file] [log] [blame]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<title>Source code</title>
<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style">
</head>
<body>
<div class="sourceContainer">
<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.log4j.core.pattern;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.Locale;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import org.apache.logging.log4j.core.LogEvent;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import org.apache.logging.log4j.core.config.Configuration;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.apache.logging.log4j.core.config.plugins.Plugin;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.apache.logging.log4j.core.util.ArrayUtils;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.logging.log4j.core.util.Constants;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.logging.log4j.core.util.Loader;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.logging.log4j.message.Message;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.logging.log4j.message.MultiformatMessage;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.logging.log4j.status.StatusLogger;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.logging.log4j.util.MultiFormatStringBuilderFormattable;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.logging.log4j.util.PerformanceSensitive;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.logging.log4j.util.StringBuilderFormattable;<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>/**<a name="line.34"></a>
<span class="sourceLineNo">035</span> * Returns the event's rendered message in a StringBuilder.<a name="line.35"></a>
<span class="sourceLineNo">036</span> */<a name="line.36"></a>
<span class="sourceLineNo">037</span>@Plugin(name = "MessagePatternConverter", category = PatternConverter.CATEGORY)<a name="line.37"></a>
<span class="sourceLineNo">038</span>@ConverterKeys({ "m", "msg", "message" })<a name="line.38"></a>
<span class="sourceLineNo">039</span>@PerformanceSensitive("allocation")<a name="line.39"></a>
<span class="sourceLineNo">040</span>public final class MessagePatternConverter extends LogEventPatternConverter {<a name="line.40"></a>
<span class="sourceLineNo">041</span><a name="line.41"></a>
<span class="sourceLineNo">042</span> private static final String NOLOOKUPS = "nolookups";<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span> private final String[] formats;<a name="line.44"></a>
<span class="sourceLineNo">045</span> private final Configuration config;<a name="line.45"></a>
<span class="sourceLineNo">046</span> private final TextRenderer textRenderer;<a name="line.46"></a>
<span class="sourceLineNo">047</span> private final boolean noLookups;<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span> /**<a name="line.49"></a>
<span class="sourceLineNo">050</span> * Private constructor.<a name="line.50"></a>
<span class="sourceLineNo">051</span> *<a name="line.51"></a>
<span class="sourceLineNo">052</span> * @param options<a name="line.52"></a>
<span class="sourceLineNo">053</span> * options, may be null.<a name="line.53"></a>
<span class="sourceLineNo">054</span> */<a name="line.54"></a>
<span class="sourceLineNo">055</span> private MessagePatternConverter(final Configuration config, final String[] options) {<a name="line.55"></a>
<span class="sourceLineNo">056</span> super("Message", "message");<a name="line.56"></a>
<span class="sourceLineNo">057</span> this.formats = options;<a name="line.57"></a>
<span class="sourceLineNo">058</span> this.config = config;<a name="line.58"></a>
<span class="sourceLineNo">059</span> final int noLookupsIdx = loadNoLookups(options);<a name="line.59"></a>
<span class="sourceLineNo">060</span> this.noLookups = Constants.FORMAT_MESSAGES_PATTERN_DISABLE_LOOKUPS || noLookupsIdx &gt;= 0;<a name="line.60"></a>
<span class="sourceLineNo">061</span> this.textRenderer = loadMessageRenderer(noLookupsIdx &gt;= 0 ? ArrayUtils.remove(options, noLookupsIdx) : options);<a name="line.61"></a>
<span class="sourceLineNo">062</span> }<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span> private int loadNoLookups(final String[] options) {<a name="line.64"></a>
<span class="sourceLineNo">065</span> if (options != null) {<a name="line.65"></a>
<span class="sourceLineNo">066</span> for (int i = 0; i &lt; options.length; i++) {<a name="line.66"></a>
<span class="sourceLineNo">067</span> final String option = options[i];<a name="line.67"></a>
<span class="sourceLineNo">068</span> if (NOLOOKUPS.equalsIgnoreCase(option)) {<a name="line.68"></a>
<span class="sourceLineNo">069</span> return i;<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> }<a name="line.72"></a>
<span class="sourceLineNo">073</span> return -1;<a name="line.73"></a>
<span class="sourceLineNo">074</span> }<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span> private TextRenderer loadMessageRenderer(final String[] options) {<a name="line.76"></a>
<span class="sourceLineNo">077</span> if (options != null) {<a name="line.77"></a>
<span class="sourceLineNo">078</span> for (final String option : options) {<a name="line.78"></a>
<span class="sourceLineNo">079</span> switch (option.toUpperCase(Locale.ROOT)) {<a name="line.79"></a>
<span class="sourceLineNo">080</span> case "ANSI":<a name="line.80"></a>
<span class="sourceLineNo">081</span> if (Loader.isJansiAvailable()) {<a name="line.81"></a>
<span class="sourceLineNo">082</span> return new JAnsiTextRenderer(options, JAnsiTextRenderer.DefaultMessageStyleMap);<a name="line.82"></a>
<span class="sourceLineNo">083</span> }<a name="line.83"></a>
<span class="sourceLineNo">084</span> StatusLogger.getLogger()<a name="line.84"></a>
<span class="sourceLineNo">085</span> .warn("You requested ANSI message rendering but JANSI is not on the classpath.");<a name="line.85"></a>
<span class="sourceLineNo">086</span> return null;<a name="line.86"></a>
<span class="sourceLineNo">087</span> case "HTML":<a name="line.87"></a>
<span class="sourceLineNo">088</span> return new HtmlTextRenderer(options);<a name="line.88"></a>
<span class="sourceLineNo">089</span> }<a name="line.89"></a>
<span class="sourceLineNo">090</span> }<a name="line.90"></a>
<span class="sourceLineNo">091</span> }<a name="line.91"></a>
<span class="sourceLineNo">092</span> return null;<a name="line.92"></a>
<span class="sourceLineNo">093</span> }<a name="line.93"></a>
<span class="sourceLineNo">094</span><a name="line.94"></a>
<span class="sourceLineNo">095</span> /**<a name="line.95"></a>
<span class="sourceLineNo">096</span> * Obtains an instance of pattern converter.<a name="line.96"></a>
<span class="sourceLineNo">097</span> *<a name="line.97"></a>
<span class="sourceLineNo">098</span> * @param config<a name="line.98"></a>
<span class="sourceLineNo">099</span> * The Configuration.<a name="line.99"></a>
<span class="sourceLineNo">100</span> * @param options<a name="line.100"></a>
<span class="sourceLineNo">101</span> * options, may be null.<a name="line.101"></a>
<span class="sourceLineNo">102</span> * @return instance of pattern converter.<a name="line.102"></a>
<span class="sourceLineNo">103</span> */<a name="line.103"></a>
<span class="sourceLineNo">104</span> public static MessagePatternConverter newInstance(final Configuration config, final String[] options) {<a name="line.104"></a>
<span class="sourceLineNo">105</span> return new MessagePatternConverter(config, options);<a name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
<span class="sourceLineNo">108</span> /**<a name="line.108"></a>
<span class="sourceLineNo">109</span> * {@inheritDoc}<a name="line.109"></a>
<span class="sourceLineNo">110</span> */<a name="line.110"></a>
<span class="sourceLineNo">111</span> @Override<a name="line.111"></a>
<span class="sourceLineNo">112</span> public void format(final LogEvent event, final StringBuilder toAppendTo) {<a name="line.112"></a>
<span class="sourceLineNo">113</span> final Message msg = event.getMessage();<a name="line.113"></a>
<span class="sourceLineNo">114</span> if (msg instanceof StringBuilderFormattable) {<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span> final boolean doRender = textRenderer != null;<a name="line.116"></a>
<span class="sourceLineNo">117</span> final StringBuilder workingBuilder = doRender ? new StringBuilder(80) : toAppendTo;<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span> final int offset = workingBuilder.length();<a name="line.119"></a>
<span class="sourceLineNo">120</span> if (msg instanceof MultiFormatStringBuilderFormattable) {<a name="line.120"></a>
<span class="sourceLineNo">121</span> ((MultiFormatStringBuilderFormattable) msg).formatTo(formats, workingBuilder);<a name="line.121"></a>
<span class="sourceLineNo">122</span> } else {<a name="line.122"></a>
<span class="sourceLineNo">123</span> ((StringBuilderFormattable) msg).formatTo(workingBuilder);<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span> // TODO can we optimize this?<a name="line.126"></a>
<span class="sourceLineNo">127</span> if (config != null &amp;&amp; !noLookups) {<a name="line.127"></a>
<span class="sourceLineNo">128</span> for (int i = offset; i &lt; workingBuilder.length() - 1; i++) {<a name="line.128"></a>
<span class="sourceLineNo">129</span> if (workingBuilder.charAt(i) == '$' &amp;&amp; workingBuilder.charAt(i + 1) == '{') {<a name="line.129"></a>
<span class="sourceLineNo">130</span> final String value = workingBuilder.substring(offset, workingBuilder.length());<a name="line.130"></a>
<span class="sourceLineNo">131</span> workingBuilder.setLength(offset);<a name="line.131"></a>
<span class="sourceLineNo">132</span> workingBuilder.append(config.getStrSubstitutor().replace(event, value));<a name="line.132"></a>
<span class="sourceLineNo">133</span> }<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> }<a name="line.135"></a>
<span class="sourceLineNo">136</span> if (doRender) {<a name="line.136"></a>
<span class="sourceLineNo">137</span> textRenderer.render(workingBuilder, toAppendTo);<a name="line.137"></a>
<span class="sourceLineNo">138</span> }<a name="line.138"></a>
<span class="sourceLineNo">139</span> return;<a name="line.139"></a>
<span class="sourceLineNo">140</span> }<a name="line.140"></a>
<span class="sourceLineNo">141</span> if (msg != null) {<a name="line.141"></a>
<span class="sourceLineNo">142</span> String result;<a name="line.142"></a>
<span class="sourceLineNo">143</span> if (msg instanceof MultiformatMessage) {<a name="line.143"></a>
<span class="sourceLineNo">144</span> result = ((MultiformatMessage) msg).getFormattedMessage(formats);<a name="line.144"></a>
<span class="sourceLineNo">145</span> } else {<a name="line.145"></a>
<span class="sourceLineNo">146</span> result = msg.getFormattedMessage();<a name="line.146"></a>
<span class="sourceLineNo">147</span> }<a name="line.147"></a>
<span class="sourceLineNo">148</span> if (result != null) {<a name="line.148"></a>
<span class="sourceLineNo">149</span> toAppendTo.append(config != null &amp;&amp; result.contains("${")<a name="line.149"></a>
<span class="sourceLineNo">150</span> ? config.getStrSubstitutor().replace(event, result) : result);<a name="line.150"></a>
<span class="sourceLineNo">151</span> } else {<a name="line.151"></a>
<span class="sourceLineNo">152</span> toAppendTo.append("null");<a name="line.152"></a>
<span class="sourceLineNo">153</span> }<a name="line.153"></a>
<span class="sourceLineNo">154</span> }<a name="line.154"></a>
<span class="sourceLineNo">155</span> }<a name="line.155"></a>
<span class="sourceLineNo">156</span>}<a name="line.156"></a>
</pre>
</div>
</body>
</html>