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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>package org.apache.logging.log4j.message;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.io.Serializable;<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.util.PerformanceSensitive;<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>/**<a name="line.23"></a>
<span class="sourceLineNo">024</span> * Implementation of the {@link MessageFactory} interface that avoids allocating temporary objects where possible.<a name="line.24"></a>
<span class="sourceLineNo">025</span> * Message instances are cached in a ThreadLocal and reused when a new message is requested within the same thread.<a name="line.25"></a>
<span class="sourceLineNo">026</span> * @see ParameterizedMessageFactory<a name="line.26"></a>
<span class="sourceLineNo">027</span> * @see ReusableSimpleMessage<a name="line.27"></a>
<span class="sourceLineNo">028</span> * @see ReusableObjectMessage<a name="line.28"></a>
<span class="sourceLineNo">029</span> * @see ReusableParameterizedMessage<a name="line.29"></a>
<span class="sourceLineNo">030</span> * @since 2.6<a name="line.30"></a>
<span class="sourceLineNo">031</span> */<a name="line.31"></a>
<span class="sourceLineNo">032</span>@PerformanceSensitive("allocation")<a name="line.32"></a>
<span class="sourceLineNo">033</span>public final class ReusableMessageFactory implements MessageFactory2, Serializable {<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span> /**<a name="line.35"></a>
<span class="sourceLineNo">036</span> * Instance of ReusableMessageFactory..<a name="line.36"></a>
<span class="sourceLineNo">037</span> */<a name="line.37"></a>
<span class="sourceLineNo">038</span> public static final ReusableMessageFactory INSTANCE = new ReusableMessageFactory();<a name="line.38"></a>
<span class="sourceLineNo">039</span><a name="line.39"></a>
<span class="sourceLineNo">040</span> private static final long serialVersionUID = -8970940216592525651L;<a name="line.40"></a>
<span class="sourceLineNo">041</span> private static ThreadLocal&lt;ReusableParameterizedMessage&gt; threadLocalParameterized = new ThreadLocal&lt;&gt;();<a name="line.41"></a>
<span class="sourceLineNo">042</span> private static ThreadLocal&lt;ReusableSimpleMessage&gt; threadLocalSimpleMessage = new ThreadLocal&lt;&gt;();<a name="line.42"></a>
<span class="sourceLineNo">043</span> private static ThreadLocal&lt;ReusableObjectMessage&gt; threadLocalObjectMessage = new ThreadLocal&lt;&gt;();<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span> /**<a name="line.45"></a>
<span class="sourceLineNo">046</span> * Constructs a message factory.<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span> public ReusableMessageFactory() {<a name="line.48"></a>
<span class="sourceLineNo">049</span> super();<a name="line.49"></a>
<span class="sourceLineNo">050</span> }<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> private static ReusableParameterizedMessage getParameterized() {<a name="line.52"></a>
<span class="sourceLineNo">053</span> ReusableParameterizedMessage result = threadLocalParameterized.get();<a name="line.53"></a>
<span class="sourceLineNo">054</span> if (result == null) {<a name="line.54"></a>
<span class="sourceLineNo">055</span> result = new ReusableParameterizedMessage();<a name="line.55"></a>
<span class="sourceLineNo">056</span> threadLocalParameterized.set(result);<a name="line.56"></a>
<span class="sourceLineNo">057</span> }<a name="line.57"></a>
<span class="sourceLineNo">058</span> return result.reserved ? new ReusableParameterizedMessage().reserve() : result.reserve();<a name="line.58"></a>
<span class="sourceLineNo">059</span> }<a name="line.59"></a>
<span class="sourceLineNo">060</span><a name="line.60"></a>
<span class="sourceLineNo">061</span> private static ReusableSimpleMessage getSimple() {<a name="line.61"></a>
<span class="sourceLineNo">062</span> ReusableSimpleMessage result = threadLocalSimpleMessage.get();<a name="line.62"></a>
<span class="sourceLineNo">063</span> if (result == null) {<a name="line.63"></a>
<span class="sourceLineNo">064</span> result = new ReusableSimpleMessage();<a name="line.64"></a>
<span class="sourceLineNo">065</span> threadLocalSimpleMessage.set(result);<a name="line.65"></a>
<span class="sourceLineNo">066</span> }<a name="line.66"></a>
<span class="sourceLineNo">067</span> return result;<a name="line.67"></a>
<span class="sourceLineNo">068</span> }<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span> private static ReusableObjectMessage getObject() {<a name="line.70"></a>
<span class="sourceLineNo">071</span> ReusableObjectMessage result = threadLocalObjectMessage.get();<a name="line.71"></a>
<span class="sourceLineNo">072</span> if (result == null) {<a name="line.72"></a>
<span class="sourceLineNo">073</span> result = new ReusableObjectMessage();<a name="line.73"></a>
<span class="sourceLineNo">074</span> threadLocalObjectMessage.set(result);<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<a name="line.75"></a>
<span class="sourceLineNo">076</span> return result;<a name="line.76"></a>
<span class="sourceLineNo">077</span> }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span> /**<a name="line.79"></a>
<span class="sourceLineNo">080</span> * Invokes {@link Clearable#clear()} when possible.<a name="line.80"></a>
<span class="sourceLineNo">081</span> * This flag is used internally to verify that a reusable message is no longer in use and<a name="line.81"></a>
<span class="sourceLineNo">082</span> * can be reused.<a name="line.82"></a>
<span class="sourceLineNo">083</span> * @param message the message to make available again<a name="line.83"></a>
<span class="sourceLineNo">084</span> * @since 2.7<a name="line.84"></a>
<span class="sourceLineNo">085</span> */<a name="line.85"></a>
<span class="sourceLineNo">086</span> public static void release(final Message message) { // LOG4J2-1583<a name="line.86"></a>
<span class="sourceLineNo">087</span> if (message instanceof Clearable) {<a name="line.87"></a>
<span class="sourceLineNo">088</span> ((Clearable) message).clear();<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> @Override<a name="line.92"></a>
<span class="sourceLineNo">093</span> public Message newMessage(final CharSequence charSequence) {<a name="line.93"></a>
<span class="sourceLineNo">094</span> final ReusableSimpleMessage result = getSimple();<a name="line.94"></a>
<span class="sourceLineNo">095</span> result.set(charSequence);<a name="line.95"></a>
<span class="sourceLineNo">096</span> return result;<a name="line.96"></a>
<span class="sourceLineNo">097</span> }<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span> /**<a name="line.99"></a>
<span class="sourceLineNo">100</span> * Creates {@link ReusableParameterizedMessage} instances.<a name="line.100"></a>
<span class="sourceLineNo">101</span> *<a name="line.101"></a>
<span class="sourceLineNo">102</span> * @param message The message pattern.<a name="line.102"></a>
<span class="sourceLineNo">103</span> * @param params The message parameters.<a name="line.103"></a>
<span class="sourceLineNo">104</span> * @return The Message.<a name="line.104"></a>
<span class="sourceLineNo">105</span> *<a name="line.105"></a>
<span class="sourceLineNo">106</span> * @see MessageFactory#newMessage(String, Object...)<a name="line.106"></a>
<span class="sourceLineNo">107</span> */<a name="line.107"></a>
<span class="sourceLineNo">108</span> @Override<a name="line.108"></a>
<span class="sourceLineNo">109</span> public Message newMessage(final String message, final Object... params) {<a name="line.109"></a>
<span class="sourceLineNo">110</span> return getParameterized().set(message, params);<a name="line.110"></a>
<span class="sourceLineNo">111</span> }<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span> @Override<a name="line.113"></a>
<span class="sourceLineNo">114</span> public Message newMessage(final String message, final Object p0) {<a name="line.114"></a>
<span class="sourceLineNo">115</span> return getParameterized().set(message, p0);<a name="line.115"></a>
<span class="sourceLineNo">116</span> }<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span> @Override<a name="line.118"></a>
<span class="sourceLineNo">119</span> public Message newMessage(final String message, final Object p0, final Object p1) {<a name="line.119"></a>
<span class="sourceLineNo">120</span> return getParameterized().set(message, p0, p1);<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span> @Override<a name="line.123"></a>
<span class="sourceLineNo">124</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2) {<a name="line.124"></a>
<span class="sourceLineNo">125</span> return getParameterized().set(message, p0, p1, p2);<a name="line.125"></a>
<span class="sourceLineNo">126</span> }<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span> @Override<a name="line.128"></a>
<span class="sourceLineNo">129</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2,<a name="line.129"></a>
<span class="sourceLineNo">130</span> final Object p3) {<a name="line.130"></a>
<span class="sourceLineNo">131</span> return getParameterized().set(message, p0, p1, p2, p3);<a name="line.131"></a>
<span class="sourceLineNo">132</span> }<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
<span class="sourceLineNo">134</span> @Override<a name="line.134"></a>
<span class="sourceLineNo">135</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3,<a name="line.135"></a>
<span class="sourceLineNo">136</span> final Object p4) {<a name="line.136"></a>
<span class="sourceLineNo">137</span> return getParameterized().set(message, p0, p1, p2, p3, p4);<a name="line.137"></a>
<span class="sourceLineNo">138</span> }<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span> @Override<a name="line.140"></a>
<span class="sourceLineNo">141</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3,<a name="line.141"></a>
<span class="sourceLineNo">142</span> final Object p4, final Object p5) {<a name="line.142"></a>
<span class="sourceLineNo">143</span> return getParameterized().set(message, p0, p1, p2, p3, p4, p5);<a name="line.143"></a>
<span class="sourceLineNo">144</span> }<a name="line.144"></a>
<span class="sourceLineNo">145</span><a name="line.145"></a>
<span class="sourceLineNo">146</span> @Override<a name="line.146"></a>
<span class="sourceLineNo">147</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3,<a name="line.147"></a>
<span class="sourceLineNo">148</span> final Object p4, final Object p5, final Object p6) {<a name="line.148"></a>
<span class="sourceLineNo">149</span> return getParameterized().set(message, p0, p1, p2, p3, p4, p5, p6);<a name="line.149"></a>
<span class="sourceLineNo">150</span> }<a name="line.150"></a>
<span class="sourceLineNo">151</span><a name="line.151"></a>
<span class="sourceLineNo">152</span> @Override<a name="line.152"></a>
<span class="sourceLineNo">153</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3,<a name="line.153"></a>
<span class="sourceLineNo">154</span> final Object p4, final Object p5, final Object p6, final Object p7) {<a name="line.154"></a>
<span class="sourceLineNo">155</span> return getParameterized().set(message, p0, p1, p2, p3, p4, p5, p6, p7);<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span><a name="line.157"></a>
<span class="sourceLineNo">158</span> @Override<a name="line.158"></a>
<span class="sourceLineNo">159</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3,<a name="line.159"></a>
<span class="sourceLineNo">160</span> final Object p4, final Object p5, final Object p6, final Object p7, final Object p8) {<a name="line.160"></a>
<span class="sourceLineNo">161</span> return getParameterized().set(message, p0, p1, p2, p3, p4, p5, p6, p7, p8);<a name="line.161"></a>
<span class="sourceLineNo">162</span> }<a name="line.162"></a>
<span class="sourceLineNo">163</span><a name="line.163"></a>
<span class="sourceLineNo">164</span> @Override<a name="line.164"></a>
<span class="sourceLineNo">165</span> public Message newMessage(final String message, final Object p0, final Object p1, final Object p2, final Object p3,<a name="line.165"></a>
<span class="sourceLineNo">166</span> final Object p4, final Object p5, final Object p6, final Object p7, final Object p8, final Object p9) {<a name="line.166"></a>
<span class="sourceLineNo">167</span> return getParameterized().set(message, p0, p1, p2, p3, p4, p5, p6, p7, p8, p9);<a name="line.167"></a>
<span class="sourceLineNo">168</span> }<a name="line.168"></a>
<span class="sourceLineNo">169</span><a name="line.169"></a>
<span class="sourceLineNo">170</span> /**<a name="line.170"></a>
<span class="sourceLineNo">171</span> * Creates {@link ReusableSimpleMessage} instances.<a name="line.171"></a>
<span class="sourceLineNo">172</span> *<a name="line.172"></a>
<span class="sourceLineNo">173</span> * @param message The message String.<a name="line.173"></a>
<span class="sourceLineNo">174</span> * @return The Message.<a name="line.174"></a>
<span class="sourceLineNo">175</span> *<a name="line.175"></a>
<span class="sourceLineNo">176</span> * @see MessageFactory#newMessage(String)<a name="line.176"></a>
<span class="sourceLineNo">177</span> */<a name="line.177"></a>
<span class="sourceLineNo">178</span> @Override<a name="line.178"></a>
<span class="sourceLineNo">179</span> public Message newMessage(final String message) {<a name="line.179"></a>
<span class="sourceLineNo">180</span> final ReusableSimpleMessage result = getSimple();<a name="line.180"></a>
<span class="sourceLineNo">181</span> result.set(message);<a name="line.181"></a>
<span class="sourceLineNo">182</span> return result;<a name="line.182"></a>
<span class="sourceLineNo">183</span> }<a name="line.183"></a>
<span class="sourceLineNo">184</span><a name="line.184"></a>
<span class="sourceLineNo">185</span><a name="line.185"></a>
<span class="sourceLineNo">186</span> /**<a name="line.186"></a>
<span class="sourceLineNo">187</span> * Creates {@link ReusableObjectMessage} instances.<a name="line.187"></a>
<span class="sourceLineNo">188</span> *<a name="line.188"></a>
<span class="sourceLineNo">189</span> * @param message The message Object.<a name="line.189"></a>
<span class="sourceLineNo">190</span> * @return The Message.<a name="line.190"></a>
<span class="sourceLineNo">191</span> *<a name="line.191"></a>
<span class="sourceLineNo">192</span> * @see MessageFactory#newMessage(Object)<a name="line.192"></a>
<span class="sourceLineNo">193</span> */<a name="line.193"></a>
<span class="sourceLineNo">194</span> @Override<a name="line.194"></a>
<span class="sourceLineNo">195</span> public Message newMessage(final Object message) {<a name="line.195"></a>
<span class="sourceLineNo">196</span> final ReusableObjectMessage result = getObject();<a name="line.196"></a>
<span class="sourceLineNo">197</span> result.set(message);<a name="line.197"></a>
<span class="sourceLineNo">198</span> return result;<a name="line.198"></a>
<span class="sourceLineNo">199</span> }<a name="line.199"></a>
<span class="sourceLineNo">200</span>}<a name="line.200"></a>
</pre>
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