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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.appender;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import java.io.BufferedOutputStream;<a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.File;<a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.FileNotFoundException;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.io.FileOutputStream;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.io.IOException;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.io.OutputStream;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.nio.channels.FileChannel;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.nio.channels.FileLock;<a name="line.26"></a>
<FONT color="green">027</FONT>    <a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>    /**<a name="line.29"></a>
<FONT color="green">030</FONT>     * Class that handles actual File I/O for File Appenders.<a name="line.30"></a>
<FONT color="green">031</FONT>     */<a name="line.31"></a>
<FONT color="green">032</FONT>    public class FileManager extends OutputStreamManager {<a name="line.32"></a>
<FONT color="green">033</FONT>    <a name="line.33"></a>
<FONT color="green">034</FONT>        private static ManagerFactory factory = new FileManagerFactory();<a name="line.34"></a>
<FONT color="green">035</FONT>    <a name="line.35"></a>
<FONT color="green">036</FONT>        private boolean isAppend;<a name="line.36"></a>
<FONT color="green">037</FONT>        private boolean isLocking;<a name="line.37"></a>
<FONT color="green">038</FONT>    <a name="line.38"></a>
<FONT color="green">039</FONT>        protected FileManager(String fileName, OutputStream os, boolean append, boolean locking) {<a name="line.39"></a>
<FONT color="green">040</FONT>            super(os, fileName);<a name="line.40"></a>
<FONT color="green">041</FONT>            this.isAppend = append;<a name="line.41"></a>
<FONT color="green">042</FONT>            this.isLocking = locking;<a name="line.42"></a>
<FONT color="green">043</FONT>        }<a name="line.43"></a>
<FONT color="green">044</FONT>    <a name="line.44"></a>
<FONT color="green">045</FONT>        /**<a name="line.45"></a>
<FONT color="green">046</FONT>         * Return the FileManager.<a name="line.46"></a>
<FONT color="green">047</FONT>         * @param fileName The name of the file to manage.<a name="line.47"></a>
<FONT color="green">048</FONT>         * @param append true if the file should be appended to, false if it should be overwritten.<a name="line.48"></a>
<FONT color="green">049</FONT>         * @param locking true if the file should be locked while writing, false otherwise.<a name="line.49"></a>
<FONT color="green">050</FONT>         * @param bufferedIO true if the contents should be buffered as they are written.<a name="line.50"></a>
<FONT color="green">051</FONT>         * @return A FileManager for the File.<a name="line.51"></a>
<FONT color="green">052</FONT>         */<a name="line.52"></a>
<FONT color="green">053</FONT>        public static FileManager getFileManager(String fileName, boolean append, boolean locking, boolean bufferedIO) {<a name="line.53"></a>
<FONT color="green">054</FONT>    <a name="line.54"></a>
<FONT color="green">055</FONT>            if (locking &amp;&amp; bufferedIO) {<a name="line.55"></a>
<FONT color="green">056</FONT>                locking = false;<a name="line.56"></a>
<FONT color="green">057</FONT>            }<a name="line.57"></a>
<FONT color="green">058</FONT>            return (FileManager) getManager(fileName, factory, new FactoryData(append, locking, bufferedIO));<a name="line.58"></a>
<FONT color="green">059</FONT>        }<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>        protected synchronized void write(byte[] bytes, int offset, int length)  {<a name="line.61"></a>
<FONT color="green">062</FONT>    <a name="line.62"></a>
<FONT color="green">063</FONT>            if (isLocking) {<a name="line.63"></a>
<FONT color="green">064</FONT>                FileChannel channel = ((FileOutputStream) getOutputStream()).getChannel();<a name="line.64"></a>
<FONT color="green">065</FONT>                try {<a name="line.65"></a>
<FONT color="green">066</FONT>                    /* Lock the whole file. This could be optimized to only lock from the current file<a name="line.66"></a>
<FONT color="green">067</FONT>                       position. Note that locking may be advisory on some systems and mandatory on others,<a name="line.67"></a>
<FONT color="green">068</FONT>                       so locking just from the current position would allow reading on systems where<a name="line.68"></a>
<FONT color="green">069</FONT>                       locking is mandatory.  Also, Java 6 will throw an exception if the region of the<a name="line.69"></a>
<FONT color="green">070</FONT>                       file is already locked by another FileChannel in the same JVM. Hopefully, that will<a name="line.70"></a>
<FONT color="green">071</FONT>                       be avoided since every file should have a single file manager - unless two different<a name="line.71"></a>
<FONT color="green">072</FONT>                       files strings are configured that somehow map to the same file.*/<a name="line.72"></a>
<FONT color="green">073</FONT>                    FileLock lock = channel.lock(0, Long.MAX_VALUE, false);<a name="line.73"></a>
<FONT color="green">074</FONT>                    try {<a name="line.74"></a>
<FONT color="green">075</FONT>                        super.write(bytes, offset, length);<a name="line.75"></a>
<FONT color="green">076</FONT>                    } finally {<a name="line.76"></a>
<FONT color="green">077</FONT>                        lock.release();<a name="line.77"></a>
<FONT color="green">078</FONT>                    }<a name="line.78"></a>
<FONT color="green">079</FONT>                } catch (IOException ex) {<a name="line.79"></a>
<FONT color="green">080</FONT>                    throw new AppenderRuntimeException("Unable to obtain lock on " + getName(), ex);<a name="line.80"></a>
<FONT color="green">081</FONT>                }<a name="line.81"></a>
<FONT color="green">082</FONT>    <a name="line.82"></a>
<FONT color="green">083</FONT>            } else {<a name="line.83"></a>
<FONT color="green">084</FONT>                super.write(bytes, offset, length);<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>
<FONT color="green">089</FONT>         * Return the name of the File being managed.<a name="line.89"></a>
<FONT color="green">090</FONT>         * @return The name of the File being managed.<a name="line.90"></a>
<FONT color="green">091</FONT>         */<a name="line.91"></a>
<FONT color="green">092</FONT>        public String getFileName() {<a name="line.92"></a>
<FONT color="green">093</FONT>            return getName();<a name="line.93"></a>
<FONT color="green">094</FONT>        }<a name="line.94"></a>
<FONT color="green">095</FONT>    <a name="line.95"></a>
<FONT color="green">096</FONT>        /**<a name="line.96"></a>
<FONT color="green">097</FONT>         * Return the append status.<a name="line.97"></a>
<FONT color="green">098</FONT>         * @return true if the file will be appended to, false if it is overwritten.<a name="line.98"></a>
<FONT color="green">099</FONT>         */<a name="line.99"></a>
<FONT color="green">100</FONT>        public boolean isAppend() {<a name="line.100"></a>
<FONT color="green">101</FONT>            return isAppend;<a name="line.101"></a>
<FONT color="green">102</FONT>        }<a name="line.102"></a>
<FONT color="green">103</FONT>    <a name="line.103"></a>
<FONT color="green">104</FONT>        /**<a name="line.104"></a>
<FONT color="green">105</FONT>         * Return the lock status.<a name="line.105"></a>
<FONT color="green">106</FONT>         * @return true if the file will be locked when writing, false otherwise.<a name="line.106"></a>
<FONT color="green">107</FONT>         */<a name="line.107"></a>
<FONT color="green">108</FONT>        public boolean isLocking() {<a name="line.108"></a>
<FONT color="green">109</FONT>            return isLocking;<a name="line.109"></a>
<FONT color="green">110</FONT>        }<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>         * Factory Data.<a name="line.113"></a>
<FONT color="green">114</FONT>         */<a name="line.114"></a>
<FONT color="green">115</FONT>        private static class FactoryData {<a name="line.115"></a>
<FONT color="green">116</FONT>            private boolean append;<a name="line.116"></a>
<FONT color="green">117</FONT>            private boolean locking;<a name="line.117"></a>
<FONT color="green">118</FONT>            private boolean bufferedIO;<a name="line.118"></a>
<FONT color="green">119</FONT>    <a name="line.119"></a>
<FONT color="green">120</FONT>            /**<a name="line.120"></a>
<FONT color="green">121</FONT>             * Constructor.<a name="line.121"></a>
<FONT color="green">122</FONT>             * @param append Append status.<a name="line.122"></a>
<FONT color="green">123</FONT>             * @param locking Locking status.<a name="line.123"></a>
<FONT color="green">124</FONT>             * @param bufferedIO Buffering flag.<a name="line.124"></a>
<FONT color="green">125</FONT>             */<a name="line.125"></a>
<FONT color="green">126</FONT>            public FactoryData(boolean append, boolean locking, boolean bufferedIO) {<a name="line.126"></a>
<FONT color="green">127</FONT>                this.append = append;<a name="line.127"></a>
<FONT color="green">128</FONT>                this.locking = locking;<a name="line.128"></a>
<FONT color="green">129</FONT>                this.bufferedIO = bufferedIO;<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>        /**<a name="line.133"></a>
<FONT color="green">134</FONT>         * Factory to create a FileManager.<a name="line.134"></a>
<FONT color="green">135</FONT>         */<a name="line.135"></a>
<FONT color="green">136</FONT>        private static class FileManagerFactory implements ManagerFactory&lt;FileManager, FactoryData&gt; {<a name="line.136"></a>
<FONT color="green">137</FONT>    <a name="line.137"></a>
<FONT color="green">138</FONT>            /**<a name="line.138"></a>
<FONT color="green">139</FONT>             * Create a FileManager.<a name="line.139"></a>
<FONT color="green">140</FONT>             * @param name The name of the File.<a name="line.140"></a>
<FONT color="green">141</FONT>             * @param data The FactoryData<a name="line.141"></a>
<FONT color="green">142</FONT>             * @return The FileManager for the File.<a name="line.142"></a>
<FONT color="green">143</FONT>             */<a name="line.143"></a>
<FONT color="green">144</FONT>            public FileManager createManager(String name, FactoryData data) {<a name="line.144"></a>
<FONT color="green">145</FONT>                File file = new File(name);<a name="line.145"></a>
<FONT color="green">146</FONT>                final File parent = file.getParentFile();<a name="line.146"></a>
<FONT color="green">147</FONT>                if (null != parent &amp;&amp; !parent.exists()) {<a name="line.147"></a>
<FONT color="green">148</FONT>                    parent.mkdirs();<a name="line.148"></a>
<FONT color="green">149</FONT>                }<a name="line.149"></a>
<FONT color="green">150</FONT>    <a name="line.150"></a>
<FONT color="green">151</FONT>                OutputStream os;<a name="line.151"></a>
<FONT color="green">152</FONT>                try {<a name="line.152"></a>
<FONT color="green">153</FONT>                    os = new FileOutputStream(name, data.append);<a name="line.153"></a>
<FONT color="green">154</FONT>                    if (data.bufferedIO) {<a name="line.154"></a>
<FONT color="green">155</FONT>                        os = new BufferedOutputStream(os);<a name="line.155"></a>
<FONT color="green">156</FONT>                    }<a name="line.156"></a>
<FONT color="green">157</FONT>                    return new FileManager(name, os, data.append, data.locking);<a name="line.157"></a>
<FONT color="green">158</FONT>                } catch (FileNotFoundException ex) {<a name="line.158"></a>
<FONT color="green">159</FONT>                    LOGGER.error("FileManager (" + name + ") " + ex);<a name="line.159"></a>
<FONT color="green">160</FONT>                }<a name="line.160"></a>
<FONT color="green">161</FONT>                return null;<a name="line.161"></a>
<FONT color="green">162</FONT>            }<a name="line.162"></a>
<FONT color="green">163</FONT>        }<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>


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