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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.net;<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    import org.apache.logging.log4j.Logger;<a name="line.19"></a>
<FONT color="green">020</FONT>    import org.apache.logging.log4j.core.appender.AppenderRuntimeException;<a name="line.20"></a>
<FONT color="green">021</FONT>    import org.apache.logging.log4j.status.StatusLogger;<a name="line.21"></a>
<FONT color="green">022</FONT>    <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.net.DatagramPacket;<a name="line.25"></a>
<FONT color="green">026</FONT>    import java.net.DatagramSocket;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.net.InetAddress;<a name="line.27"></a>
<FONT color="green">028</FONT>    import java.net.SocketException;<a name="line.28"></a>
<FONT color="green">029</FONT>    import java.net.UnknownHostException;<a name="line.29"></a>
<FONT color="green">030</FONT>    <a name="line.30"></a>
<FONT color="green">031</FONT>    /**<a name="line.31"></a>
<FONT color="green">032</FONT>     * OutputStream for UDP connections.<a name="line.32"></a>
<FONT color="green">033</FONT>     */<a name="line.33"></a>
<FONT color="green">034</FONT>    public class DatagramOutputStream extends OutputStream {<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>         * Allow subclasses access to the status logger without creating another instance.<a name="line.37"></a>
<FONT color="green">038</FONT>         */<a name="line.38"></a>
<FONT color="green">039</FONT>        protected static final Logger LOGGER = StatusLogger.getLogger();<a name="line.39"></a>
<FONT color="green">040</FONT>    <a name="line.40"></a>
<FONT color="green">041</FONT>        private static final int SHIFT_1 = 8;<a name="line.41"></a>
<FONT color="green">042</FONT>        private static final int SHIFT_2 = 16;<a name="line.42"></a>
<FONT color="green">043</FONT>        private static final int SHIFT_3 = 24;<a name="line.43"></a>
<FONT color="green">044</FONT>    <a name="line.44"></a>
<FONT color="green">045</FONT>        private DatagramSocket ds;<a name="line.45"></a>
<FONT color="green">046</FONT>        private InetAddress address;<a name="line.46"></a>
<FONT color="green">047</FONT>        private int port;<a name="line.47"></a>
<FONT color="green">048</FONT>    <a name="line.48"></a>
<FONT color="green">049</FONT>        private byte[] data;<a name="line.49"></a>
<FONT color="green">050</FONT>    <a name="line.50"></a>
<FONT color="green">051</FONT>        /**<a name="line.51"></a>
<FONT color="green">052</FONT>         * The Constructor.<a name="line.52"></a>
<FONT color="green">053</FONT>         * @param host The host to connect to.<a name="line.53"></a>
<FONT color="green">054</FONT>         * @param port The port on the host.<a name="line.54"></a>
<FONT color="green">055</FONT>         */<a name="line.55"></a>
<FONT color="green">056</FONT>        public DatagramOutputStream(String host, int port) {<a name="line.56"></a>
<FONT color="green">057</FONT>            this.port = port;<a name="line.57"></a>
<FONT color="green">058</FONT>            try {<a name="line.58"></a>
<FONT color="green">059</FONT>                address = InetAddress.getByName(host);<a name="line.59"></a>
<FONT color="green">060</FONT>            } catch (UnknownHostException ex) {<a name="line.60"></a>
<FONT color="green">061</FONT>                String msg = "Could not find host " + host;<a name="line.61"></a>
<FONT color="green">062</FONT>                LOGGER.error(msg, ex);<a name="line.62"></a>
<FONT color="green">063</FONT>                throw new AppenderRuntimeException(msg, ex);<a name="line.63"></a>
<FONT color="green">064</FONT>            }<a name="line.64"></a>
<FONT color="green">065</FONT>    <a name="line.65"></a>
<FONT color="green">066</FONT>            try {<a name="line.66"></a>
<FONT color="green">067</FONT>                ds = new DatagramSocket();<a name="line.67"></a>
<FONT color="green">068</FONT>            } catch (SocketException ex) {<a name="line.68"></a>
<FONT color="green">069</FONT>                String msg = "Could not instantiate DatagramSocket to " + host;<a name="line.69"></a>
<FONT color="green">070</FONT>                LOGGER.error(msg, ex);<a name="line.70"></a>
<FONT color="green">071</FONT>                throw new AppenderRuntimeException(msg, ex);<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>    <a name="line.74"></a>
<FONT color="green">075</FONT>        @Override<a name="line.75"></a>
<FONT color="green">076</FONT>        public synchronized void write(byte[] bytes, int offset, int length) throws IOException {<a name="line.76"></a>
<FONT color="green">077</FONT>            copy(bytes, offset, length);<a name="line.77"></a>
<FONT color="green">078</FONT>        }<a name="line.78"></a>
<FONT color="green">079</FONT>    <a name="line.79"></a>
<FONT color="green">080</FONT>        @Override<a name="line.80"></a>
<FONT color="green">081</FONT>        public synchronized void write(int i) throws IOException {<a name="line.81"></a>
<FONT color="green">082</FONT>            copy(new byte[] {(byte) (i &gt;&gt;&gt; SHIFT_3), (byte) (i &gt;&gt;&gt; SHIFT_2), (byte) (i &gt;&gt;&gt; SHIFT_1), (byte) i}, 0, 4);<a name="line.82"></a>
<FONT color="green">083</FONT>        }<a name="line.83"></a>
<FONT color="green">084</FONT>    <a name="line.84"></a>
<FONT color="green">085</FONT>        @Override<a name="line.85"></a>
<FONT color="green">086</FONT>        public synchronized void write(byte[] bytes) throws IOException {<a name="line.86"></a>
<FONT color="green">087</FONT>            copy(bytes, 0, bytes.length);<a name="line.87"></a>
<FONT color="green">088</FONT>        }<a name="line.88"></a>
<FONT color="green">089</FONT>    <a name="line.89"></a>
<FONT color="green">090</FONT>        @Override<a name="line.90"></a>
<FONT color="green">091</FONT>        public synchronized void flush() throws IOException {<a name="line.91"></a>
<FONT color="green">092</FONT>            if (this.ds != null &amp;&amp; this.address != null) {<a name="line.92"></a>
<FONT color="green">093</FONT>                DatagramPacket packet = new DatagramPacket(data, data.length, address, port);<a name="line.93"></a>
<FONT color="green">094</FONT>                ds.send(packet);<a name="line.94"></a>
<FONT color="green">095</FONT>            }<a name="line.95"></a>
<FONT color="green">096</FONT>            data = null;<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>        @Override<a name="line.99"></a>
<FONT color="green">100</FONT>        public synchronized void close() throws IOException {<a name="line.100"></a>
<FONT color="green">101</FONT>            if (ds != null) {<a name="line.101"></a>
<FONT color="green">102</FONT>                if (data != null) {<a name="line.102"></a>
<FONT color="green">103</FONT>                    flush();<a name="line.103"></a>
<FONT color="green">104</FONT>                }<a name="line.104"></a>
<FONT color="green">105</FONT>                ds.close();<a name="line.105"></a>
<FONT color="green">106</FONT>                ds = null;<a name="line.106"></a>
<FONT color="green">107</FONT>            }<a name="line.107"></a>
<FONT color="green">108</FONT>        }<a name="line.108"></a>
<FONT color="green">109</FONT>    <a name="line.109"></a>
<FONT color="green">110</FONT>        private void copy(byte[] bytes, int offset, int length) {<a name="line.110"></a>
<FONT color="green">111</FONT>            int index = data == null ? 0 : data.length;<a name="line.111"></a>
<FONT color="green">112</FONT>            byte[] copy = new byte[length + index];<a name="line.112"></a>
<FONT color="green">113</FONT>            if (data != null) {<a name="line.113"></a>
<FONT color="green">114</FONT>                System.arraycopy(data, 0, copy, 0, index);<a name="line.114"></a>
<FONT color="green">115</FONT>            }<a name="line.115"></a>
<FONT color="green">116</FONT>            System.arraycopy(bytes, offset, copy, index, length);<a name="line.116"></a>
<FONT color="green">117</FONT>            data = copy;<a name="line.117"></a>
<FONT color="green">118</FONT>        }<a name="line.118"></a>
<FONT color="green">119</FONT>    }<a name="line.119"></a>


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