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<FONT color="green">001</FONT>    package org.apache.archiva.transaction;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    /*<a name="line.3"></a>
<FONT color="green">004</FONT>     * Licensed to the Apache Software Foundation (ASF) under one<a name="line.4"></a>
<FONT color="green">005</FONT>     * or more contributor license agreements.  See the NOTICE file<a name="line.5"></a>
<FONT color="green">006</FONT>     * distributed with this work for additional information<a name="line.6"></a>
<FONT color="green">007</FONT>     * regarding copyright ownership.  The ASF licenses this file<a name="line.7"></a>
<FONT color="green">008</FONT>     * to you under the Apache License, Version 2.0 (the<a name="line.8"></a>
<FONT color="green">009</FONT>     * "License"); you may not use this file except in compliance<a name="line.9"></a>
<FONT color="green">010</FONT>     * with the License.  You may obtain a copy of the License at<a name="line.10"></a>
<FONT color="green">011</FONT>     *<a name="line.11"></a>
<FONT color="green">012</FONT>     *   http://www.apache.org/licenses/LICENSE-2.0<a name="line.12"></a>
<FONT color="green">013</FONT>     *<a name="line.13"></a>
<FONT color="green">014</FONT>     * Unless required by applicable law or agreed to in writing,<a name="line.14"></a>
<FONT color="green">015</FONT>     * software distributed under the License is distributed on an<a name="line.15"></a>
<FONT color="green">016</FONT>     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY<a name="line.16"></a>
<FONT color="green">017</FONT>     * KIND, either express or implied.  See the License for the<a name="line.17"></a>
<FONT color="green">018</FONT>     * specific language governing permissions and limitations<a name="line.18"></a>
<FONT color="green">019</FONT>     * under the License.<a name="line.19"></a>
<FONT color="green">020</FONT>     */<a name="line.20"></a>
<FONT color="green">021</FONT>    <a name="line.21"></a>
<FONT color="green">022</FONT>    import org.apache.commons.io.FileUtils;<a name="line.22"></a>
<FONT color="green">023</FONT>    import org.codehaus.plexus.digest.Digester;<a name="line.23"></a>
<FONT color="green">024</FONT>    import org.codehaus.plexus.digest.DigesterException;<a name="line.24"></a>
<FONT color="green">025</FONT>    <a name="line.25"></a>
<FONT color="green">026</FONT>    import java.io.File;<a name="line.26"></a>
<FONT color="green">027</FONT>    import java.io.IOException;<a name="line.27"></a>
<FONT color="green">028</FONT>    import java.util.ArrayList;<a name="line.28"></a>
<FONT color="green">029</FONT>    import java.util.Collections;<a name="line.29"></a>
<FONT color="green">030</FONT>    import java.util.HashMap;<a name="line.30"></a>
<FONT color="green">031</FONT>    import java.util.Iterator;<a name="line.31"></a>
<FONT color="green">032</FONT>    import java.util.List;<a name="line.32"></a>
<FONT color="green">033</FONT>    import java.util.Map;<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>    /**<a name="line.35"></a>
<FONT color="green">036</FONT>     * Abstract class for the TransactionEvents<a name="line.36"></a>
<FONT color="green">037</FONT>     *<a name="line.37"></a>
<FONT color="green">038</FONT>     *<a name="line.38"></a>
<FONT color="green">039</FONT>     */<a name="line.39"></a>
<FONT color="green">040</FONT>    public abstract class AbstractTransactionEvent<a name="line.40"></a>
<FONT color="green">041</FONT>        implements TransactionEvent<a name="line.41"></a>
<FONT color="green">042</FONT>    {<a name="line.42"></a>
<FONT color="green">043</FONT>        private Map&lt;File, File&gt; backups = new HashMap&lt;File, File&gt;();<a name="line.43"></a>
<FONT color="green">044</FONT>    <a name="line.44"></a>
<FONT color="green">045</FONT>        private List&lt;File&gt; createdDirs = new ArrayList&lt;File&gt;();<a name="line.45"></a>
<FONT color="green">046</FONT>    <a name="line.46"></a>
<FONT color="green">047</FONT>        private List&lt;File&gt; createdFiles = new ArrayList&lt;File&gt;();<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>         * {@link List}&amp;lt;{@link Digester}&gt;<a name="line.50"></a>
<FONT color="green">051</FONT>         */<a name="line.51"></a>
<FONT color="green">052</FONT>        private List&lt;? extends Digester&gt; digesters;<a name="line.52"></a>
<FONT color="green">053</FONT>    <a name="line.53"></a>
<FONT color="green">054</FONT>        protected AbstractTransactionEvent()<a name="line.54"></a>
<FONT color="green">055</FONT>        {<a name="line.55"></a>
<FONT color="green">056</FONT>            this( new ArrayList&lt;Digester&gt;( 0 ) );<a name="line.56"></a>
<FONT color="green">057</FONT>        }<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>        protected AbstractTransactionEvent( List&lt;? extends Digester&gt; digesters )<a name="line.59"></a>
<FONT color="green">060</FONT>        {<a name="line.60"></a>
<FONT color="green">061</FONT>            this.digesters = digesters;<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>        protected List&lt;? extends Digester&gt; getDigesters()<a name="line.64"></a>
<FONT color="green">065</FONT>        {<a name="line.65"></a>
<FONT color="green">066</FONT>            return digesters;<a name="line.66"></a>
<FONT color="green">067</FONT>        }<a name="line.67"></a>
<FONT color="green">068</FONT>    <a name="line.68"></a>
<FONT color="green">069</FONT>        /**<a name="line.69"></a>
<FONT color="green">070</FONT>         * Method that creates a directory as well as all the parent directories needed<a name="line.70"></a>
<FONT color="green">071</FONT>         *<a name="line.71"></a>
<FONT color="green">072</FONT>         * @param dir The File directory to be created<a name="line.72"></a>
<FONT color="green">073</FONT>         * @throws IOException when an unrecoverable error occurred<a name="line.73"></a>
<FONT color="green">074</FONT>         */<a name="line.74"></a>
<FONT color="green">075</FONT>        protected void mkDirs( File dir )<a name="line.75"></a>
<FONT color="green">076</FONT>            throws IOException<a name="line.76"></a>
<FONT color="green">077</FONT>        {<a name="line.77"></a>
<FONT color="green">078</FONT>            List&lt;File&gt; createDirs = new ArrayList&lt;File&gt;();<a name="line.78"></a>
<FONT color="green">079</FONT>    <a name="line.79"></a>
<FONT color="green">080</FONT>            File parent = dir;<a name="line.80"></a>
<FONT color="green">081</FONT>            while ( !parent.exists() || !parent.isDirectory() )<a name="line.81"></a>
<FONT color="green">082</FONT>            {<a name="line.82"></a>
<FONT color="green">083</FONT>                createDirs.add( parent );<a name="line.83"></a>
<FONT color="green">084</FONT>    <a name="line.84"></a>
<FONT color="green">085</FONT>                parent = parent.getParentFile();<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>            while ( !createDirs.isEmpty() )<a name="line.88"></a>
<FONT color="green">089</FONT>            {<a name="line.89"></a>
<FONT color="green">090</FONT>                File directory = (File) createDirs.remove( createDirs.size() - 1 );<a name="line.90"></a>
<FONT color="green">091</FONT>    <a name="line.91"></a>
<FONT color="green">092</FONT>                if ( directory.mkdir() )<a name="line.92"></a>
<FONT color="green">093</FONT>                {<a name="line.93"></a>
<FONT color="green">094</FONT>                    createdDirs.add( directory );<a name="line.94"></a>
<FONT color="green">095</FONT>                }<a name="line.95"></a>
<FONT color="green">096</FONT>                else<a name="line.96"></a>
<FONT color="green">097</FONT>                {<a name="line.97"></a>
<FONT color="green">098</FONT>                    throw new IOException( "Failed to create directory: " + directory.getAbsolutePath() );<a name="line.98"></a>
<FONT color="green">099</FONT>                }<a name="line.99"></a>
<FONT color="green">100</FONT>            }<a name="line.100"></a>
<FONT color="green">101</FONT>        }<a name="line.101"></a>
<FONT color="green">102</FONT>    <a name="line.102"></a>
<FONT color="green">103</FONT>        protected void revertMkDirs()<a name="line.103"></a>
<FONT color="green">104</FONT>            throws IOException<a name="line.104"></a>
<FONT color="green">105</FONT>        {<a name="line.105"></a>
<FONT color="green">106</FONT>            if ( createdDirs != null )<a name="line.106"></a>
<FONT color="green">107</FONT>            {<a name="line.107"></a>
<FONT color="green">108</FONT>                Collections.reverse( createdDirs );<a name="line.108"></a>
<FONT color="green">109</FONT>    <a name="line.109"></a>
<FONT color="green">110</FONT>                while ( !createdDirs.isEmpty() )<a name="line.110"></a>
<FONT color="green">111</FONT>                {<a name="line.111"></a>
<FONT color="green">112</FONT>                    File dir = (File) createdDirs.remove( 0 );<a name="line.112"></a>
<FONT color="green">113</FONT>    <a name="line.113"></a>
<FONT color="green">114</FONT>                    if ( dir.isDirectory() &amp;&amp; dir.list().length == 0 )<a name="line.114"></a>
<FONT color="green">115</FONT>                    {<a name="line.115"></a>
<FONT color="green">116</FONT>                        FileUtils.deleteDirectory( dir );<a name="line.116"></a>
<FONT color="green">117</FONT>                    }<a name="line.117"></a>
<FONT color="green">118</FONT>                    else<a name="line.118"></a>
<FONT color="green">119</FONT>                    {<a name="line.119"></a>
<FONT color="green">120</FONT>                        //cannot rollback created directory if it still contains files<a name="line.120"></a>
<FONT color="green">121</FONT>                        break;<a name="line.121"></a>
<FONT color="green">122</FONT>                    }<a name="line.122"></a>
<FONT color="green">123</FONT>                }<a name="line.123"></a>
<FONT color="green">124</FONT>            }<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 revertFilesCreated()<a name="line.127"></a>
<FONT color="green">128</FONT>            throws IOException<a name="line.128"></a>
<FONT color="green">129</FONT>        {<a name="line.129"></a>
<FONT color="green">130</FONT>            Iterator&lt;File&gt; it = createdFiles.iterator();<a name="line.130"></a>
<FONT color="green">131</FONT>            while ( it.hasNext() )<a name="line.131"></a>
<FONT color="green">132</FONT>            {<a name="line.132"></a>
<FONT color="green">133</FONT>                File file = (File) it.next();<a name="line.133"></a>
<FONT color="green">134</FONT>                file.delete();<a name="line.134"></a>
<FONT color="green">135</FONT>                it.remove();<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>        protected void createBackup( File file )<a name="line.139"></a>
<FONT color="green">140</FONT>            throws IOException<a name="line.140"></a>
<FONT color="green">141</FONT>        {<a name="line.141"></a>
<FONT color="green">142</FONT>            if ( file.exists() &amp;&amp; file.isFile() )<a name="line.142"></a>
<FONT color="green">143</FONT>            {<a name="line.143"></a>
<FONT color="green">144</FONT>                File backup = File.createTempFile( "temp-", ".backup" );<a name="line.144"></a>
<FONT color="green">145</FONT>    <a name="line.145"></a>
<FONT color="green">146</FONT>                FileUtils.copyFile( file, backup );<a name="line.146"></a>
<FONT color="green">147</FONT>    <a name="line.147"></a>
<FONT color="green">148</FONT>                backup.deleteOnExit();<a name="line.148"></a>
<FONT color="green">149</FONT>    <a name="line.149"></a>
<FONT color="green">150</FONT>                backups.put( file, backup );<a name="line.150"></a>
<FONT color="green">151</FONT>            }<a name="line.151"></a>
<FONT color="green">152</FONT>        }<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>        protected void restoreBackups()<a name="line.154"></a>
<FONT color="green">155</FONT>            throws IOException<a name="line.155"></a>
<FONT color="green">156</FONT>        {<a name="line.156"></a>
<FONT color="green">157</FONT>            for ( Map.Entry&lt;File, File&gt; entry : backups.entrySet() )<a name="line.157"></a>
<FONT color="green">158</FONT>            {<a name="line.158"></a>
<FONT color="green">159</FONT>                FileUtils.copyFile( entry.getValue(), entry.getKey() );<a name="line.159"></a>
<FONT color="green">160</FONT>            }<a name="line.160"></a>
<FONT color="green">161</FONT>        }<a name="line.161"></a>
<FONT color="green">162</FONT>    <a name="line.162"></a>
<FONT color="green">163</FONT>        protected void restoreBackup( File file )<a name="line.163"></a>
<FONT color="green">164</FONT>            throws IOException<a name="line.164"></a>
<FONT color="green">165</FONT>        {<a name="line.165"></a>
<FONT color="green">166</FONT>            File backup = (File) backups.get( file );<a name="line.166"></a>
<FONT color="green">167</FONT>            if ( backup != null )<a name="line.167"></a>
<FONT color="green">168</FONT>            {<a name="line.168"></a>
<FONT color="green">169</FONT>                FileUtils.copyFile( backup, file );<a name="line.169"></a>
<FONT color="green">170</FONT>            }<a name="line.170"></a>
<FONT color="green">171</FONT>        }<a name="line.171"></a>
<FONT color="green">172</FONT>    <a name="line.172"></a>
<FONT color="green">173</FONT>        /**<a name="line.173"></a>
<FONT color="green">174</FONT>         * Create checksums of file using all digesters defined at construction time.<a name="line.174"></a>
<FONT color="green">175</FONT>         *<a name="line.175"></a>
<FONT color="green">176</FONT>         * @param file<a name="line.176"></a>
<FONT color="green">177</FONT>         * @param force whether existing checksums should be overwritten or not<a name="line.177"></a>
<FONT color="green">178</FONT>         * @throws IOException<a name="line.178"></a>
<FONT color="green">179</FONT>         */<a name="line.179"></a>
<FONT color="green">180</FONT>        protected void createChecksums( File file, boolean force )<a name="line.180"></a>
<FONT color="green">181</FONT>            throws IOException<a name="line.181"></a>
<FONT color="green">182</FONT>        {<a name="line.182"></a>
<FONT color="green">183</FONT>            for ( Digester digester : getDigesters() )<a name="line.183"></a>
<FONT color="green">184</FONT>            {<a name="line.184"></a>
<FONT color="green">185</FONT>                File checksumFile = new File( file.getAbsolutePath() + "." + getDigesterFileExtension( digester ) );<a name="line.185"></a>
<FONT color="green">186</FONT>                if ( checksumFile.exists() )<a name="line.186"></a>
<FONT color="green">187</FONT>                {<a name="line.187"></a>
<FONT color="green">188</FONT>                    if ( !force )<a name="line.188"></a>
<FONT color="green">189</FONT>                    {<a name="line.189"></a>
<FONT color="green">190</FONT>                        continue;<a name="line.190"></a>
<FONT color="green">191</FONT>                    }<a name="line.191"></a>
<FONT color="green">192</FONT>                    createBackup( checksumFile );<a name="line.192"></a>
<FONT color="green">193</FONT>                }<a name="line.193"></a>
<FONT color="green">194</FONT>                else<a name="line.194"></a>
<FONT color="green">195</FONT>                {<a name="line.195"></a>
<FONT color="green">196</FONT>                    createdFiles.add( checksumFile );<a name="line.196"></a>
<FONT color="green">197</FONT>                }<a name="line.197"></a>
<FONT color="green">198</FONT>    <a name="line.198"></a>
<FONT color="green">199</FONT>                try<a name="line.199"></a>
<FONT color="green">200</FONT>                {<a name="line.200"></a>
<FONT color="green">201</FONT>                    writeStringToFile( checksumFile, digester.calc( file ) );<a name="line.201"></a>
<FONT color="green">202</FONT>                }<a name="line.202"></a>
<FONT color="green">203</FONT>                catch ( DigesterException e )<a name="line.203"></a>
<FONT color="green">204</FONT>                {<a name="line.204"></a>
<FONT color="green">205</FONT>                    throw (IOException) e.getCause();<a name="line.205"></a>
<FONT color="green">206</FONT>                }<a name="line.206"></a>
<FONT color="green">207</FONT>            }<a name="line.207"></a>
<FONT color="green">208</FONT>        }<a name="line.208"></a>
<FONT color="green">209</FONT>    <a name="line.209"></a>
<FONT color="green">210</FONT>        /**<a name="line.210"></a>
<FONT color="green">211</FONT>         * TODO: Remove in favor of using FileUtils directly.<a name="line.211"></a>
<FONT color="green">212</FONT>         */<a name="line.212"></a>
<FONT color="green">213</FONT>        protected void writeStringToFile( File file, String content )<a name="line.213"></a>
<FONT color="green">214</FONT>            throws IOException<a name="line.214"></a>
<FONT color="green">215</FONT>        {<a name="line.215"></a>
<FONT color="green">216</FONT>            FileUtils.writeStringToFile( file, content );<a name="line.216"></a>
<FONT color="green">217</FONT>        }<a name="line.217"></a>
<FONT color="green">218</FONT>    <a name="line.218"></a>
<FONT color="green">219</FONT>        /**<a name="line.219"></a>
<FONT color="green">220</FONT>         * File extension for checksums<a name="line.220"></a>
<FONT color="green">221</FONT>         * TODO should be moved to plexus-digester ?<a name="line.221"></a>
<FONT color="green">222</FONT>         */<a name="line.222"></a>
<FONT color="green">223</FONT>        protected String getDigesterFileExtension( Digester digester )<a name="line.223"></a>
<FONT color="green">224</FONT>        {<a name="line.224"></a>
<FONT color="green">225</FONT>            return digester.getAlgorithm().toLowerCase().replaceAll( "-", "" );<a name="line.225"></a>
<FONT color="green">226</FONT>        }<a name="line.226"></a>
<FONT color="green">227</FONT>    <a name="line.227"></a>
<FONT color="green">228</FONT>    }<a name="line.228"></a>


</PRE>
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