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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<a name="line.2"></a>
<FONT color="green">003</FONT>     * or more contributor license agreements.  See the NOTICE file<a name="line.3"></a>
<FONT color="green">004</FONT>     * distributed with this work for additional information<a name="line.4"></a>
<FONT color="green">005</FONT>     * regarding copyright ownership.  The ASF licenses this file<a name="line.5"></a>
<FONT color="green">006</FONT>     * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<FONT color="green">007</FONT>     * "License"); you may not use this file except in compliance<a name="line.7"></a>
<FONT color="green">008</FONT>     * with the License.  You may obtain a copy of the License at<a name="line.8"></a>
<FONT color="green">009</FONT>     *<a name="line.9"></a>
<FONT color="green">010</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<FONT color="green">011</FONT>     *<a name="line.11"></a>
<FONT color="green">012</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<FONT color="green">013</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<FONT color="green">014</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<FONT color="green">015</FONT>     * See the License for the specific language governing permissions and<a name="line.15"></a>
<FONT color="green">016</FONT>     * limitations under the License.<a name="line.16"></a>
<FONT color="green">017</FONT>     */<a name="line.17"></a>
<FONT color="green">018</FONT>    <a name="line.18"></a>
<FONT color="green">019</FONT>    package org.apache.hadoop.mapred.lib.db;<a name="line.19"></a>
<FONT color="green">020</FONT>    <a name="line.20"></a>
<FONT color="green">021</FONT>    import java.io.IOException;<a name="line.21"></a>
<FONT color="green">022</FONT>    import java.sql.Connection;<a name="line.22"></a>
<FONT color="green">023</FONT>    import java.sql.PreparedStatement;<a name="line.23"></a>
<FONT color="green">024</FONT>    import java.sql.SQLException;<a name="line.24"></a>
<FONT color="green">025</FONT>    <a name="line.25"></a>
<FONT color="green">026</FONT>    import org.apache.hadoop.classification.InterfaceAudience;<a name="line.26"></a>
<FONT color="green">027</FONT>    import org.apache.hadoop.classification.InterfaceStability;<a name="line.27"></a>
<FONT color="green">028</FONT>    import org.apache.hadoop.fs.FileSystem;<a name="line.28"></a>
<FONT color="green">029</FONT>    import org.apache.hadoop.mapred.JobConf;<a name="line.29"></a>
<FONT color="green">030</FONT>    import org.apache.hadoop.mapred.OutputFormat;<a name="line.30"></a>
<FONT color="green">031</FONT>    import org.apache.hadoop.mapred.RecordWriter;<a name="line.31"></a>
<FONT color="green">032</FONT>    import org.apache.hadoop.mapred.Reporter;<a name="line.32"></a>
<FONT color="green">033</FONT>    import org.apache.hadoop.mapreduce.MRJobConfig;<a name="line.33"></a>
<FONT color="green">034</FONT>    import org.apache.hadoop.mapreduce.TaskAttemptID;<a name="line.34"></a>
<FONT color="green">035</FONT>    import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl;<a name="line.35"></a>
<FONT color="green">036</FONT>    import org.apache.hadoop.util.Progressable;<a name="line.36"></a>
<FONT color="green">037</FONT>    <a name="line.37"></a>
<FONT color="green">038</FONT>    @InterfaceAudience.Public<a name="line.38"></a>
<FONT color="green">039</FONT>    @InterfaceStability.Stable<a name="line.39"></a>
<FONT color="green">040</FONT>    public class DBOutputFormat&lt;K  extends DBWritable, V&gt; <a name="line.40"></a>
<FONT color="green">041</FONT>        extends org.apache.hadoop.mapreduce.lib.db.DBOutputFormat&lt;K, V&gt;<a name="line.41"></a>
<FONT color="green">042</FONT>        implements OutputFormat&lt;K, V&gt; {<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 RecordWriter that writes the reduce output to a SQL table<a name="line.45"></a>
<FONT color="green">046</FONT>       */<a name="line.46"></a>
<FONT color="green">047</FONT>      protected class DBRecordWriter extends <a name="line.47"></a>
<FONT color="green">048</FONT>          org.apache.hadoop.mapreduce.lib.db.DBOutputFormat&lt;K, V&gt;.DBRecordWriter<a name="line.48"></a>
<FONT color="green">049</FONT>          implements RecordWriter&lt;K, V&gt; {<a name="line.49"></a>
<FONT color="green">050</FONT>    <a name="line.50"></a>
<FONT color="green">051</FONT>        protected DBRecordWriter(Connection connection, <a name="line.51"></a>
<FONT color="green">052</FONT>          PreparedStatement statement) throws SQLException {<a name="line.52"></a>
<FONT color="green">053</FONT>          super(connection, statement);<a name="line.53"></a>
<FONT color="green">054</FONT>        }<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>        /** {@inheritDoc} */<a name="line.56"></a>
<FONT color="green">057</FONT>        public void close(Reporter reporter) throws IOException {<a name="line.57"></a>
<FONT color="green">058</FONT>          super.close(null);<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>      /** {@inheritDoc} */<a name="line.62"></a>
<FONT color="green">063</FONT>      public void checkOutputSpecs(FileSystem filesystem, JobConf job)<a name="line.63"></a>
<FONT color="green">064</FONT>      throws IOException {<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>      /** {@inheritDoc} */<a name="line.68"></a>
<FONT color="green">069</FONT>      public RecordWriter&lt;K, V&gt; getRecordWriter(FileSystem filesystem,<a name="line.69"></a>
<FONT color="green">070</FONT>          JobConf job, String name, Progressable progress) throws IOException {<a name="line.70"></a>
<FONT color="green">071</FONT>        org.apache.hadoop.mapreduce.RecordWriter&lt;K, V&gt; w = super.getRecordWriter(<a name="line.71"></a>
<FONT color="green">072</FONT>          new TaskAttemptContextImpl(job, <a name="line.72"></a>
<FONT color="green">073</FONT>                TaskAttemptID.forName(job.get(MRJobConfig.TASK_ATTEMPT_ID))));<a name="line.73"></a>
<FONT color="green">074</FONT>        org.apache.hadoop.mapreduce.lib.db.DBOutputFormat.DBRecordWriter writer = <a name="line.74"></a>
<FONT color="green">075</FONT>         (org.apache.hadoop.mapreduce.lib.db.DBOutputFormat.DBRecordWriter) w;<a name="line.75"></a>
<FONT color="green">076</FONT>        try {<a name="line.76"></a>
<FONT color="green">077</FONT>          return new DBRecordWriter(writer.getConnection(), writer.getStatement());<a name="line.77"></a>
<FONT color="green">078</FONT>        } catch(SQLException se) {<a name="line.78"></a>
<FONT color="green">079</FONT>          throw new IOException(se);<a name="line.79"></a>
<FONT color="green">080</FONT>        }<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>       * Initializes the reduce-part of the job with the appropriate output settings<a name="line.84"></a>
<FONT color="green">085</FONT>       * <a name="line.85"></a>
<FONT color="green">086</FONT>       * @param job The job<a name="line.86"></a>
<FONT color="green">087</FONT>       * @param tableName The table to insert data into<a name="line.87"></a>
<FONT color="green">088</FONT>       * @param fieldNames The field names in the table.<a name="line.88"></a>
<FONT color="green">089</FONT>       */<a name="line.89"></a>
<FONT color="green">090</FONT>      public static void setOutput(JobConf job, String tableName, String... fieldNames) {<a name="line.90"></a>
<FONT color="green">091</FONT>        if(fieldNames.length &gt; 0 &amp;&amp; fieldNames[0] != null) {<a name="line.91"></a>
<FONT color="green">092</FONT>          DBConfiguration dbConf = setOutput(job, tableName);<a name="line.92"></a>
<FONT color="green">093</FONT>          dbConf.setOutputFieldNames(fieldNames);<a name="line.93"></a>
<FONT color="green">094</FONT>        } else {<a name="line.94"></a>
<FONT color="green">095</FONT>          if(fieldNames.length &gt; 0)<a name="line.95"></a>
<FONT color="green">096</FONT>            setOutput(job, tableName, fieldNames.length);<a name="line.96"></a>
<FONT color="green">097</FONT>          else <a name="line.97"></a>
<FONT color="green">098</FONT>            throw new IllegalArgumentException("Field names must be greater than 0");<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>       * Initializes the reduce-part of the job with the appropriate output settings<a name="line.103"></a>
<FONT color="green">104</FONT>       * <a name="line.104"></a>
<FONT color="green">105</FONT>       * @param job The job<a name="line.105"></a>
<FONT color="green">106</FONT>       * @param tableName The table to insert data into<a name="line.106"></a>
<FONT color="green">107</FONT>       * @param fieldCount the number of fields in the table.<a name="line.107"></a>
<FONT color="green">108</FONT>       */<a name="line.108"></a>
<FONT color="green">109</FONT>      public static void setOutput(JobConf job, String tableName, int fieldCount) {<a name="line.109"></a>
<FONT color="green">110</FONT>        DBConfiguration dbConf = setOutput(job, tableName);<a name="line.110"></a>
<FONT color="green">111</FONT>        dbConf.setOutputFieldCount(fieldCount);<a name="line.111"></a>
<FONT color="green">112</FONT>      }<a name="line.112"></a>
<FONT color="green">113</FONT>      <a name="line.113"></a>
<FONT color="green">114</FONT>      private static DBConfiguration setOutput(JobConf job, String tableName) {<a name="line.114"></a>
<FONT color="green">115</FONT>        job.setOutputFormat(DBOutputFormat.class);<a name="line.115"></a>
<FONT color="green">116</FONT>        job.setReduceSpeculativeExecution(false);<a name="line.116"></a>
<FONT color="green">117</FONT>    <a name="line.117"></a>
<FONT color="green">118</FONT>        DBConfiguration dbConf = new DBConfiguration(job);<a name="line.118"></a>
<FONT color="green">119</FONT>        <a name="line.119"></a>
<FONT color="green">120</FONT>        dbConf.setOutputTableName(tableName);<a name="line.120"></a>
<FONT color="green">121</FONT>        return dbConf;<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>




























































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