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apache / logging-log4j-site / d0d0de55986756593c08e5d2b8059541eacaf428 / . / log4j-2.0-alpha1-SNAPSHOT / log4j-core / apidocs / src-html / org / apache / logging / log4j / core / appender / OutputStreamManager.html
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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.IOException;<a name="line.19"></a>
<FONT color="green">020</FONT> import java.io.OutputStream;<a name="line.20"></a>
<FONT color="green">021</FONT> <a name="line.21"></a>
<FONT color="green">022</FONT> /**<a name="line.22"></a>
<FONT color="green">023</FONT> * Manage an OutputStream so that it can be shared by multiple Appenders and will<a name="line.23"></a>
<FONT color="green">024</FONT> * allow appenders to reconfigure without requiring a new stream.<a name="line.24"></a>
<FONT color="green">025</FONT> */<a name="line.25"></a>
<FONT color="green">026</FONT> public class OutputStreamManager extends AbstractManager {<a name="line.26"></a>
<FONT color="green">027</FONT> <a name="line.27"></a>
<FONT color="green">028</FONT> private OutputStream os;<a name="line.28"></a>
<FONT color="green">029</FONT> <a name="line.29"></a>
<FONT color="green">030</FONT> private byte[] footer = null;<a name="line.30"></a>
<FONT color="green">031</FONT> <a name="line.31"></a>
<FONT color="green">032</FONT> protected OutputStreamManager(OutputStream os, String streamName) {<a name="line.32"></a>
<FONT color="green">033</FONT> super(streamName);<a name="line.33"></a>
<FONT color="green">034</FONT> this.os = os;<a name="line.34"></a>
<FONT color="green">035</FONT> }<a name="line.35"></a>
<FONT color="green">036</FONT> <a name="line.36"></a>
<FONT color="green">037</FONT> /**<a name="line.37"></a>
<FONT color="green">038</FONT> * Create a Manager.<a name="line.38"></a>
<FONT color="green">039</FONT> * @param name The name of the stream to manage.<a name="line.39"></a>
<FONT color="green">040</FONT> * @param factory The factory to use to create the Manager.<a name="line.40"></a>
<FONT color="green">041</FONT> * @param data The data to pass to the Manager.<a name="line.41"></a>
<FONT color="green">042</FONT> * @return An OutputStreamManager.<a name="line.42"></a>
<FONT color="green">043</FONT> */<a name="line.43"></a>
<FONT color="green">044</FONT> public static OutputStreamManager getManager(String name, ManagerFactory&lt;OutputStreamManager, Object&gt; factory,<a name="line.44"></a>
<FONT color="green">045</FONT> Object data) {<a name="line.45"></a>
<FONT color="green">046</FONT> return AbstractManager.getManager(name, factory, data);<a name="line.46"></a>
<FONT color="green">047</FONT> }<a name="line.47"></a>
<FONT color="green">048</FONT> <a name="line.48"></a>
<FONT color="green">049</FONT> /**<a name="line.49"></a>
<FONT color="green">050</FONT> * Set the header to write when the stream is opened.<a name="line.50"></a>
<FONT color="green">051</FONT> * @param header The header.<a name="line.51"></a>
<FONT color="green">052</FONT> */<a name="line.52"></a>
<FONT color="green">053</FONT> public synchronized void setHeader(byte[] header) {<a name="line.53"></a>
<FONT color="green">054</FONT> if (header != null) {<a name="line.54"></a>
<FONT color="green">055</FONT> try {<a name="line.55"></a>
<FONT color="green">056</FONT> this.os.write(header, 0, header.length);<a name="line.56"></a>
<FONT color="green">057</FONT> } catch (IOException ioe) {<a name="line.57"></a>
<FONT color="green">058</FONT> LOGGER.error("Unable to write header", ioe);<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> }<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> * Set the footer to write when the stream is closed.<a name="line.64"></a>
<FONT color="green">065</FONT> * @param footer The footer.<a name="line.65"></a>
<FONT color="green">066</FONT> */<a name="line.66"></a>
<FONT color="green">067</FONT> public synchronized void setFooter(byte[] footer) {<a name="line.67"></a>
<FONT color="green">068</FONT> if (footer != null) {<a name="line.68"></a>
<FONT color="green">069</FONT> this.footer = footer;<a name="line.69"></a>
<FONT color="green">070</FONT> }<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> * Default hook to write footer during close.<a name="line.74"></a>
<FONT color="green">075</FONT> */<a name="line.75"></a>
<FONT color="green">076</FONT> public void releaseSub() {<a name="line.76"></a>
<FONT color="green">077</FONT> if (footer != null) {<a name="line.77"></a>
<FONT color="green">078</FONT> write(footer);<a name="line.78"></a>
<FONT color="green">079</FONT> }<a name="line.79"></a>
<FONT color="green">080</FONT> close();<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> /**<a name="line.83"></a>
<FONT color="green">084</FONT> * Return the status of the stream.<a name="line.84"></a>
<FONT color="green">085</FONT> * @return true if the stream is open, false if it is not.<a name="line.85"></a>
<FONT color="green">086</FONT> */<a name="line.86"></a>
<FONT color="green">087</FONT> public boolean isOpen() {<a name="line.87"></a>
<FONT color="green">088</FONT> return getCount() &gt; 0;<a name="line.88"></a>
<FONT color="green">089</FONT> }<a name="line.89"></a>
<FONT color="green">090</FONT> <a name="line.90"></a>
<FONT color="green">091</FONT> protected OutputStream getOutputStream() {<a name="line.91"></a>
<FONT color="green">092</FONT> return os;<a name="line.92"></a>
<FONT color="green">093</FONT> }<a name="line.93"></a>
<FONT color="green">094</FONT> <a name="line.94"></a>
<FONT color="green">095</FONT> protected void setOutputStream(OutputStream os) {<a name="line.95"></a>
<FONT color="green">096</FONT> this.os = os;<a name="line.96"></a>
<FONT color="green">097</FONT> }<a name="line.97"></a>
<FONT color="green">098</FONT> <a name="line.98"></a>
<FONT color="green">099</FONT> /**<a name="line.99"></a>
<FONT color="green">100</FONT> * Some output streams synchronize writes while others do not. Synchronizing here insures that<a name="line.100"></a>
<FONT color="green">101</FONT> * log events won't be intertwined.<a name="line.101"></a>
<FONT color="green">102</FONT> * @param bytes The serialized Log event.<a name="line.102"></a>
<FONT color="green">103</FONT> * @param offset The offset into the byte array.<a name="line.103"></a>
<FONT color="green">104</FONT> * @param length The number of bytes to write.<a name="line.104"></a>
<FONT color="green">105</FONT> * @throws AppenderRuntimeException if an error occurs.<a name="line.105"></a>
<FONT color="green">106</FONT> */<a name="line.106"></a>
<FONT color="green">107</FONT> protected synchronized void write(byte[] bytes, int offset, int length) {<a name="line.107"></a>
<FONT color="green">108</FONT> //System.out.println("write " + count);<a name="line.108"></a>
<FONT color="green">109</FONT> try {<a name="line.109"></a>
<FONT color="green">110</FONT> os.write(bytes, offset, length);<a name="line.110"></a>
<FONT color="green">111</FONT> } catch (IOException ex) {<a name="line.111"></a>
<FONT color="green">112</FONT> String msg = "Error writing to stream " + getName();<a name="line.112"></a>
<FONT color="green">113</FONT> throw new AppenderRuntimeException(msg, ex);<a name="line.113"></a>
<FONT color="green">114</FONT> }<a name="line.114"></a>
<FONT color="green">115</FONT> }<a name="line.115"></a>
<FONT color="green">116</FONT> <a name="line.116"></a>
<FONT color="green">117</FONT> /**<a name="line.117"></a>
<FONT color="green">118</FONT> * Some output streams synchronize writes while others do not. Synchronizing here insures that<a name="line.118"></a>
<FONT color="green">119</FONT> * log events won't be intertwined.<a name="line.119"></a>
<FONT color="green">120</FONT> * @param bytes The serialized Log event.<a name="line.120"></a>
<FONT color="green">121</FONT> * @throws AppenderRuntimeException if an error occurs.<a name="line.121"></a>
<FONT color="green">122</FONT> */<a name="line.122"></a>
<FONT color="green">123</FONT> protected void write(byte[] bytes) {<a name="line.123"></a>
<FONT color="green">124</FONT> write(bytes, 0, bytes.length);<a name="line.124"></a>
<FONT color="green">125</FONT> }<a name="line.125"></a>
<FONT color="green">126</FONT> <a name="line.126"></a>
<FONT color="green">127</FONT> protected void close() {<a name="line.127"></a>
<FONT color="green">128</FONT> if (os == System.out || os == System.err) {<a name="line.128"></a>
<FONT color="green">129</FONT> return;<a name="line.129"></a>
<FONT color="green">130</FONT> }<a name="line.130"></a>
<FONT color="green">131</FONT> try {<a name="line.131"></a>
<FONT color="green">132</FONT> os.close();<a name="line.132"></a>
<FONT color="green">133</FONT> } catch (IOException ex) {<a name="line.133"></a>
<FONT color="green">134</FONT> LOGGER.error("Unable to close stream " + getName() + ". " + ex);<a name="line.134"></a>
<FONT color="green">135</FONT> }<a name="line.135"></a>
<FONT color="green">136</FONT> }<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> * Flush any buffers.<a name="line.139"></a>
<FONT color="green">140</FONT> */<a name="line.140"></a>
<FONT color="green">141</FONT> public void flush() {<a name="line.141"></a>
<FONT color="green">142</FONT> try {<a name="line.142"></a>
<FONT color="green">143</FONT> os.flush();<a name="line.143"></a>
<FONT color="green">144</FONT> } catch (IOException ex) {<a name="line.144"></a>
<FONT color="green">145</FONT> String msg = "Error flushing stream " + getName();<a name="line.145"></a>
<FONT color="green">146</FONT> throw new AppenderRuntimeException(msg, ex);<a name="line.146"></a>
<FONT color="green">147</FONT> }<a name="line.147"></a>
<FONT color="green">148</FONT> }<a name="line.148"></a>
<FONT color="green">149</FONT> }<a name="line.149"></a>
</PRE>
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