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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 java.io.File;<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.util.ArrayList;<a name="line.24"></a>
<FONT color="green">025</FONT>    import java.util.List;<a name="line.25"></a>
<FONT color="green">026</FONT>    <a name="line.26"></a>
<FONT color="green">027</FONT>    import org.codehaus.plexus.digest.Digester;<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>     * Implement commit/rollback semantics for a set of files.<a name="line.30"></a>
<FONT color="green">031</FONT>     *<a name="line.31"></a>
<FONT color="green">032</FONT>     */<a name="line.32"></a>
<FONT color="green">033</FONT>    public class FileTransaction<a name="line.33"></a>
<FONT color="green">034</FONT>    {<a name="line.34"></a>
<FONT color="green">035</FONT>        private List&lt;AbstractTransactionEvent&gt; events = new ArrayList&lt;AbstractTransactionEvent&gt;();<a name="line.35"></a>
<FONT color="green">036</FONT>    <a name="line.36"></a>
<FONT color="green">037</FONT>        public void commit()<a name="line.37"></a>
<FONT color="green">038</FONT>            throws TransactionException<a name="line.38"></a>
<FONT color="green">039</FONT>        {<a name="line.39"></a>
<FONT color="green">040</FONT>            List&lt;TransactionEvent&gt; toRollback = new ArrayList&lt;TransactionEvent&gt;( events.size() );<a name="line.40"></a>
<FONT color="green">041</FONT>    <a name="line.41"></a>
<FONT color="green">042</FONT>            for ( TransactionEvent event : events )<a name="line.42"></a>
<FONT color="green">043</FONT>            {<a name="line.43"></a>
<FONT color="green">044</FONT>                try<a name="line.44"></a>
<FONT color="green">045</FONT>                {<a name="line.45"></a>
<FONT color="green">046</FONT>                    event.commit();<a name="line.46"></a>
<FONT color="green">047</FONT>    <a name="line.47"></a>
<FONT color="green">048</FONT>                    toRollback.add( event );<a name="line.48"></a>
<FONT color="green">049</FONT>                }<a name="line.49"></a>
<FONT color="green">050</FONT>                catch ( IOException e )<a name="line.50"></a>
<FONT color="green">051</FONT>                {<a name="line.51"></a>
<FONT color="green">052</FONT>                    try<a name="line.52"></a>
<FONT color="green">053</FONT>                    {<a name="line.53"></a>
<FONT color="green">054</FONT>                        rollback( toRollback );<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>                        throw new TransactionException( "Unable to commit file transaction", e );<a name="line.56"></a>
<FONT color="green">057</FONT>                    }<a name="line.57"></a>
<FONT color="green">058</FONT>                    catch ( IOException ioe )<a name="line.58"></a>
<FONT color="green">059</FONT>                    {<a name="line.59"></a>
<FONT color="green">060</FONT>                        throw new TransactionException(<a name="line.60"></a>
<FONT color="green">061</FONT>                            "Unable to commit file transaction, and rollback failed with error: '" + ioe.getMessage() + "'",<a name="line.61"></a>
<FONT color="green">062</FONT>                            e );<a name="line.62"></a>
<FONT color="green">063</FONT>                    }<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>        }<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        private void rollback( List&lt;TransactionEvent&gt; toRollback )<a name="line.68"></a>
<FONT color="green">069</FONT>            throws IOException<a name="line.69"></a>
<FONT color="green">070</FONT>        {<a name="line.70"></a>
<FONT color="green">071</FONT>            for ( TransactionEvent event : toRollback )<a name="line.71"></a>
<FONT color="green">072</FONT>            {<a name="line.72"></a>
<FONT color="green">073</FONT>                event.rollback();<a name="line.73"></a>
<FONT color="green">074</FONT>            }<a name="line.74"></a>
<FONT color="green">075</FONT>        }<a name="line.75"></a>
<FONT color="green">076</FONT>    <a name="line.76"></a>
<FONT color="green">077</FONT>        /**<a name="line.77"></a>
<FONT color="green">078</FONT>         * @param source<a name="line.78"></a>
<FONT color="green">079</FONT>         * @param destination<a name="line.79"></a>
<FONT color="green">080</FONT>         * @param digesters   {@link List}&amp;lt;{@link org.codehaus.plexus.digest.Digester}&gt; digesters to use for checksumming<a name="line.80"></a>
<FONT color="green">081</FONT>         */<a name="line.81"></a>
<FONT color="green">082</FONT>        public void copyFile( File source, File destination, List&lt;? extends Digester&gt; digesters )<a name="line.82"></a>
<FONT color="green">083</FONT>        {<a name="line.83"></a>
<FONT color="green">084</FONT>            events.add( new CopyFileEvent( source, destination, digesters ) );<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>         * @param content<a name="line.88"></a>
<FONT color="green">089</FONT>         * @param destination<a name="line.89"></a>
<FONT color="green">090</FONT>         * @param digesters   {@link List}&amp;lt;{@link org.codehaus.plexus.digest.Digester}&gt; digesters to use for checksumming<a name="line.90"></a>
<FONT color="green">091</FONT>         */<a name="line.91"></a>
<FONT color="green">092</FONT>        public void createFile( String content, File destination, List&lt;? extends Digester&gt; digesters )<a name="line.92"></a>
<FONT color="green">093</FONT>        {<a name="line.93"></a>
<FONT color="green">094</FONT>            events.add( new CreateFileEvent( content, destination, digesters ) );<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>


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