http://git-wip-us.apache.org/repos/asf/hbase-site/blob/db523e4d/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.html ---------------------------------------------------------------------- diff --git a/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.html b/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.html index cac98c7..74c422b 100644 --- a/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.html +++ b/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.html @@ -452,7 +452,7 @@ <span class="sourceLineNo">444</span> private void validateFamiliesInHFiles(Table table, Deque<LoadQueueItem> queue)<a name="line.444"></a> <span class="sourceLineNo">445</span> throws IOException {<a name="line.445"></a> <span class="sourceLineNo">446</span> Collection<HColumnDescriptor> families = table.getTableDescriptor().getFamilies();<a name="line.446"></a> -<span class="sourceLineNo">447</span> List<String> familyNames = new ArrayList<String>(families.size());<a name="line.447"></a> +<span class="sourceLineNo">447</span> List<String> familyNames = new ArrayList<>(families.size());<a name="line.447"></a> <span class="sourceLineNo">448</span> for (HColumnDescriptor family : families) {<a name="line.448"></a> <span class="sourceLineNo">449</span> familyNames.add(family.getNameAsString());<a name="line.449"></a> <span class="sourceLineNo">450</span> }<a name="line.450"></a> @@ -509,7 +509,7 @@ <span class="sourceLineNo">501</span> ExecutorService pool, Deque<LoadQueueItem> queue,<a name="line.501"></a> <span class="sourceLineNo">502</span> final Multimap<ByteBuffer, LoadQueueItem> regionGroups) throws IOException {<a name="line.502"></a> <span class="sourceLineNo">503</span> // atomically bulk load the groups.<a name="line.503"></a> -<span class="sourceLineNo">504</span> Set<Future<List<LoadQueueItem>>> loadingFutures = new HashSet<Future<List<LoadQueueItem>>>();<a name="line.504"></a> +<span class="sourceLineNo">504</span> Set<Future<List<LoadQueueItem>>> loadingFutures = new HashSet<>();<a name="line.504"></a> <span class="sourceLineNo">505</span> for (Entry<ByteBuffer, ? extends Collection<LoadQueueItem>> e: regionGroups.asMap().entrySet()){<a name="line.505"></a> <span class="sourceLineNo">506</span> final byte[] first = e.getKey().array();<a name="line.506"></a> <span class="sourceLineNo">507</span> final Collection<LoadQueueItem> lqis = e.getValue();<a name="line.507"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/db523e4d/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormat.html ---------------------------------------------------------------------- diff --git a/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormat.html b/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormat.html index 18172d6..1f612d6 100644 --- a/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormat.html +++ b/apidocs/src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormat.html @@ -29,278 +29,279 @@ <span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a> <span class="sourceLineNo">022</span>import java.util.Collections;<a name="line.22"></a> <span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a> -<span class="sourceLineNo">024</span><a name="line.24"></a> -<span class="sourceLineNo">025</span>import org.apache.commons.logging.Log;<a name="line.25"></a> -<span class="sourceLineNo">026</span>import org.apache.commons.logging.LogFactory;<a name="line.26"></a> -<span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configurable;<a name="line.27"></a> -<span class="sourceLineNo">028</span>import org.apache.hadoop.conf.Configuration;<a name="line.28"></a> -<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.KeyValue;<a name="line.29"></a> -<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.TableName;<a name="line.30"></a> -<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.31"></a> -<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.classification.InterfaceStability;<a name="line.32"></a> -<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.Connection;<a name="line.33"></a> -<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.34"></a> -<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.RegionLocator;<a name="line.35"></a> -<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.36"></a> -<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.37"></a> -<span class="sourceLineNo">038</span>import org.apache.hadoop.mapreduce.InputSplit;<a name="line.38"></a> -<span class="sourceLineNo">039</span>import org.apache.hadoop.mapreduce.JobContext;<a name="line.39"></a> -<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.40"></a> -<span class="sourceLineNo">041</span>import org.apache.hadoop.mapreduce.Job;<a name="line.41"></a> -<span class="sourceLineNo">042</span>import org.apache.hadoop.util.StringUtils;<a name="line.42"></a> -<span class="sourceLineNo">043</span><a name="line.43"></a> -<span class="sourceLineNo">044</span>/**<a name="line.44"></a> -<span class="sourceLineNo">045</span> * Convert HBase tabular data into a format that is consumable by Map/Reduce.<a name="line.45"></a> -<span class="sourceLineNo">046</span> */<a name="line.46"></a> -<span class="sourceLineNo">047</span>@InterfaceAudience.Public<a name="line.47"></a> -<span class="sourceLineNo">048</span>@InterfaceStability.Stable<a name="line.48"></a> -<span class="sourceLineNo">049</span>public class TableInputFormat extends TableInputFormatBase<a name="line.49"></a> -<span class="sourceLineNo">050</span>implements Configurable {<a name="line.50"></a> -<span class="sourceLineNo">051</span><a name="line.51"></a> -<span class="sourceLineNo">052</span> @SuppressWarnings("hiding")<a name="line.52"></a> -<span class="sourceLineNo">053</span> private static final Log LOG = LogFactory.getLog(TableInputFormat.class);<a name="line.53"></a> -<span class="sourceLineNo">054</span><a name="line.54"></a> -<span class="sourceLineNo">055</span> /** Job parameter that specifies the input table. */<a name="line.55"></a> -<span class="sourceLineNo">056</span> public static final String INPUT_TABLE = "hbase.mapreduce.inputtable";<a name="line.56"></a> -<span class="sourceLineNo">057</span> /**<a name="line.57"></a> -<span class="sourceLineNo">058</span> * If specified, use start keys of this table to split.<a name="line.58"></a> -<span class="sourceLineNo">059</span> * This is useful when you are preparing data for bulkload.<a name="line.59"></a> -<span class="sourceLineNo">060</span> */<a name="line.60"></a> -<span class="sourceLineNo">061</span> private static final String SPLIT_TABLE = "hbase.mapreduce.splittable";<a name="line.61"></a> -<span class="sourceLineNo">062</span> /** Base-64 encoded scanner. All other SCAN_ confs are ignored if this is specified.<a name="line.62"></a> -<span class="sourceLineNo">063</span> * See {@link TableMapReduceUtil#convertScanToString(Scan)} for more details.<a name="line.63"></a> -<span class="sourceLineNo">064</span> */<a name="line.64"></a> -<span class="sourceLineNo">065</span> public static final String SCAN = "hbase.mapreduce.scan";<a name="line.65"></a> -<span class="sourceLineNo">066</span> /** Scan start row */<a name="line.66"></a> -<span class="sourceLineNo">067</span> public static final String SCAN_ROW_START = "hbase.mapreduce.scan.row.start";<a name="line.67"></a> -<span class="sourceLineNo">068</span> /** Scan stop row */<a name="line.68"></a> -<span class="sourceLineNo">069</span> public static final String SCAN_ROW_STOP = "hbase.mapreduce.scan.row.stop";<a name="line.69"></a> -<span class="sourceLineNo">070</span> /** Column Family to Scan */<a name="line.70"></a> -<span class="sourceLineNo">071</span> public static final String SCAN_COLUMN_FAMILY = "hbase.mapreduce.scan.column.family";<a name="line.71"></a> -<span class="sourceLineNo">072</span> /** Space delimited list of columns and column families to scan. */<a name="line.72"></a> -<span class="sourceLineNo">073</span> public static final String SCAN_COLUMNS = "hbase.mapreduce.scan.columns";<a name="line.73"></a> -<span class="sourceLineNo">074</span> /** The timestamp used to filter columns with a specific timestamp. */<a name="line.74"></a> -<span class="sourceLineNo">075</span> public static final String SCAN_TIMESTAMP = "hbase.mapreduce.scan.timestamp";<a name="line.75"></a> -<span class="sourceLineNo">076</span> /** The starting timestamp used to filter columns with a specific range of versions. */<a name="line.76"></a> -<span class="sourceLineNo">077</span> public static final String SCAN_TIMERANGE_START = "hbase.mapreduce.scan.timerange.start";<a name="line.77"></a> -<span class="sourceLineNo">078</span> /** The ending timestamp used to filter columns with a specific range of versions. */<a name="line.78"></a> -<span class="sourceLineNo">079</span> public static final String SCAN_TIMERANGE_END = "hbase.mapreduce.scan.timerange.end";<a name="line.79"></a> -<span class="sourceLineNo">080</span> /** The maximum number of version to return. */<a name="line.80"></a> -<span class="sourceLineNo">081</span> public static final String SCAN_MAXVERSIONS = "hbase.mapreduce.scan.maxversions";<a name="line.81"></a> -<span class="sourceLineNo">082</span> /** Set to false to disable server-side caching of blocks for this scan. */<a name="line.82"></a> -<span class="sourceLineNo">083</span> public static final String SCAN_CACHEBLOCKS = "hbase.mapreduce.scan.cacheblocks";<a name="line.83"></a> -<span class="sourceLineNo">084</span> /** The number of rows for caching that will be passed to scanners. */<a name="line.84"></a> -<span class="sourceLineNo">085</span> public static final String SCAN_CACHEDROWS = "hbase.mapreduce.scan.cachedrows";<a name="line.85"></a> -<span class="sourceLineNo">086</span> /** Set the maximum number of values to return for each call to next(). */<a name="line.86"></a> -<span class="sourceLineNo">087</span> public static final String SCAN_BATCHSIZE = "hbase.mapreduce.scan.batchsize";<a name="line.87"></a> -<span class="sourceLineNo">088</span> /** Specify if we have to shuffle the map tasks. */<a name="line.88"></a> -<span class="sourceLineNo">089</span> public static final String SHUFFLE_MAPS = "hbase.mapreduce.inputtable.shufflemaps";<a name="line.89"></a> -<span class="sourceLineNo">090</span><a name="line.90"></a> -<span class="sourceLineNo">091</span> /** The configuration. */<a name="line.91"></a> -<span class="sourceLineNo">092</span> private Configuration conf = null;<a name="line.92"></a> -<span class="sourceLineNo">093</span><a name="line.93"></a> -<span class="sourceLineNo">094</span> /**<a name="line.94"></a> -<span class="sourceLineNo">095</span> * Returns the current configuration.<a name="line.95"></a> -<span class="sourceLineNo">096</span> *<a name="line.96"></a> -<span class="sourceLineNo">097</span> * @return The current configuration.<a name="line.97"></a> -<span class="sourceLineNo">098</span> * @see org.apache.hadoop.conf.Configurable#getConf()<a name="line.98"></a> -<span class="sourceLineNo">099</span> */<a name="line.99"></a> -<span class="sourceLineNo">100</span> @Override<a name="line.100"></a> -<span class="sourceLineNo">101</span> public Configuration getConf() {<a name="line.101"></a> -<span class="sourceLineNo">102</span> return conf;<a name="line.102"></a> -<span class="sourceLineNo">103</span> }<a name="line.103"></a> -<span class="sourceLineNo">104</span><a name="line.104"></a> -<span class="sourceLineNo">105</span> /**<a name="line.105"></a> -<span class="sourceLineNo">106</span> * Sets the configuration. This is used to set the details for the table to<a name="line.106"></a> -<span class="sourceLineNo">107</span> * be scanned.<a name="line.107"></a> -<span class="sourceLineNo">108</span> *<a name="line.108"></a> -<span class="sourceLineNo">109</span> * @param configuration The configuration to set.<a name="line.109"></a> -<span class="sourceLineNo">110</span> * @see org.apache.hadoop.conf.Configurable#setConf(<a name="line.110"></a> -<span class="sourceLineNo">111</span> * org.apache.hadoop.conf.Configuration)<a name="line.111"></a> -<span class="sourceLineNo">112</span> */<a name="line.112"></a> -<span class="sourceLineNo">113</span> @Override<a name="line.113"></a> -<span class="sourceLineNo">114</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="REC_CATCH_EXCEPTION",<a name="line.114"></a> -<span class="sourceLineNo">115</span> justification="Intentional")<a name="line.115"></a> -<span class="sourceLineNo">116</span> public void setConf(Configuration configuration) {<a name="line.116"></a> -<span class="sourceLineNo">117</span> this.conf = configuration;<a name="line.117"></a> -<span class="sourceLineNo">118</span><a name="line.118"></a> -<span class="sourceLineNo">119</span> Scan scan = null;<a name="line.119"></a> -<span class="sourceLineNo">120</span><a name="line.120"></a> -<span class="sourceLineNo">121</span> if (conf.get(SCAN) != null) {<a name="line.121"></a> -<span class="sourceLineNo">122</span> try {<a name="line.122"></a> -<span class="sourceLineNo">123</span> scan = TableMapReduceUtil.convertStringToScan(conf.get(SCAN));<a name="line.123"></a> -<span class="sourceLineNo">124</span> } catch (IOException e) {<a name="line.124"></a> -<span class="sourceLineNo">125</span> LOG.error("An error occurred.", e);<a name="line.125"></a> -<span class="sourceLineNo">126</span> }<a name="line.126"></a> -<span class="sourceLineNo">127</span> } else {<a name="line.127"></a> -<span class="sourceLineNo">128</span> try {<a name="line.128"></a> -<span class="sourceLineNo">129</span> scan = createScanFromConfiguration(conf);<a name="line.129"></a> -<span class="sourceLineNo">130</span> } catch (Exception e) {<a name="line.130"></a> -<span class="sourceLineNo">131</span> LOG.error(StringUtils.stringifyException(e));<a name="line.131"></a> -<span class="sourceLineNo">132</span> }<a name="line.132"></a> -<span class="sourceLineNo">133</span> }<a name="line.133"></a> -<span class="sourceLineNo">134</span><a name="line.134"></a> -<span class="sourceLineNo">135</span> setScan(scan);<a name="line.135"></a> -<span class="sourceLineNo">136</span> }<a name="line.136"></a> -<span class="sourceLineNo">137</span><a name="line.137"></a> -<span class="sourceLineNo">138</span> /**<a name="line.138"></a> -<span class="sourceLineNo">139</span> * Sets up a {@link Scan} instance, applying settings from the configuration property<a name="line.139"></a> -<span class="sourceLineNo">140</span> * constants defined in {@code TableInputFormat}. This allows specifying things such as:<a name="line.140"></a> -<span class="sourceLineNo">141</span> * <ul><a name="line.141"></a> -<span class="sourceLineNo">142</span> * <li>start and stop rows</li><a name="line.142"></a> -<span class="sourceLineNo">143</span> * <li>column qualifiers or families</li><a name="line.143"></a> -<span class="sourceLineNo">144</span> * <li>timestamps or timerange</li><a name="line.144"></a> -<span class="sourceLineNo">145</span> * <li>scanner caching and batch size</li><a name="line.145"></a> -<span class="sourceLineNo">146</span> * </ul><a name="line.146"></a> -<span class="sourceLineNo">147</span> */<a name="line.147"></a> -<span class="sourceLineNo">148</span> public static Scan createScanFromConfiguration(Configuration conf) throws IOException {<a name="line.148"></a> -<span class="sourceLineNo">149</span> Scan scan = new Scan();<a name="line.149"></a> -<span class="sourceLineNo">150</span><a name="line.150"></a> -<span class="sourceLineNo">151</span> if (conf.get(SCAN_ROW_START) != null) {<a name="line.151"></a> -<span class="sourceLineNo">152</span> scan.setStartRow(Bytes.toBytesBinary(conf.get(SCAN_ROW_START)));<a name="line.152"></a> -<span class="sourceLineNo">153</span> }<a name="line.153"></a> -<span class="sourceLineNo">154</span><a name="line.154"></a> -<span class="sourceLineNo">155</span> if (conf.get(SCAN_ROW_STOP) != null) {<a name="line.155"></a> -<span class="sourceLineNo">156</span> scan.setStopRow(Bytes.toBytesBinary(conf.get(SCAN_ROW_STOP)));<a name="line.156"></a> -<span class="sourceLineNo">157</span> }<a name="line.157"></a> -<span class="sourceLineNo">158</span><a name="line.158"></a> -<span class="sourceLineNo">159</span> if (conf.get(SCAN_COLUMNS) != null) {<a name="line.159"></a> -<span class="sourceLineNo">160</span> addColumns(scan, conf.get(SCAN_COLUMNS));<a name="line.160"></a> -<span class="sourceLineNo">161</span> }<a name="line.161"></a> -<span class="sourceLineNo">162</span><a name="line.162"></a> 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protected void initialize(JobContext context) throws IOException {<a name="line.196"></a> -<span class="sourceLineNo">197</span> // Do we have to worry about mis-matches between the Configuration from setConf and the one<a name="line.197"></a> -<span class="sourceLineNo">198</span> // in this context?<a name="line.198"></a> -<span class="sourceLineNo">199</span> TableName tableName = TableName.valueOf(conf.get(INPUT_TABLE));<a name="line.199"></a> -<span class="sourceLineNo">200</span> try {<a name="line.200"></a> -<span class="sourceLineNo">201</span> initializeTable(ConnectionFactory.createConnection(new Configuration(conf)), tableName);<a name="line.201"></a> -<span class="sourceLineNo">202</span> } catch (Exception e) {<a name="line.202"></a> -<span class="sourceLineNo">203</span> LOG.error(StringUtils.stringifyException(e));<a name="line.203"></a> -<span class="sourceLineNo">204</span> }<a name="line.204"></a> -<span class="sourceLineNo">205</span> }<a name="line.205"></a> -<span class="sourceLineNo">206</span><a name="line.206"></a> -<span class="sourceLineNo">207</span> /**<a name="line.207"></a> -<span class="sourceLineNo">208</span> * Parses a combined family and qualifier and adds either both or just the<a name="line.208"></a> -<span class="sourceLineNo">209</span> * family in case there is no qualifier. This assumes the older colon<a name="line.209"></a> -<span class="sourceLineNo">210</span> * divided notation, e.g. "family:qualifier".<a name="line.210"></a> -<span class="sourceLineNo">211</span> *<a name="line.211"></a> -<span class="sourceLineNo">212</span> * @param scan The Scan to update.<a name="line.212"></a> -<span class="sourceLineNo">213</span> * @param familyAndQualifier family and qualifier<a name="line.213"></a> -<span class="sourceLineNo">214</span> * @throws IllegalArgumentException When familyAndQualifier is invalid.<a name="line.214"></a> -<span class="sourceLineNo">215</span> */<a name="line.215"></a> -<span class="sourceLineNo">216</span> private static void addColumn(Scan scan, byte[] familyAndQualifier) {<a name="line.216"></a> -<span class="sourceLineNo">217</span> byte [][] fq = KeyValue.parseColumn(familyAndQualifier);<a name="line.217"></a> -<span class="sourceLineNo">218</span> if (fq.length == 1) {<a name="line.218"></a> -<span class="sourceLineNo">219</span> scan.addFamily(fq[0]);<a name="line.219"></a> -<span class="sourceLineNo">220</span> } else if (fq.length == 2) {<a name="line.220"></a> -<span class="sourceLineNo">221</span> scan.addColumn(fq[0], fq[1]);<a name="line.221"></a> -<span class="sourceLineNo">222</span> } else {<a name="line.222"></a> -<span class="sourceLineNo">223</span> throw new IllegalArgumentException("Invalid familyAndQualifier provided.");<a name="line.223"></a> -<span class="sourceLineNo">224</span> }<a name="line.224"></a> -<span class="sourceLineNo">225</span> }<a name="line.225"></a> -<span class="sourceLineNo">226</span><a name="line.226"></a> -<span class="sourceLineNo">227</span> /**<a name="line.227"></a> -<span class="sourceLineNo">228</span> * Adds an array of columns specified using old format, family:qualifier.<a name="line.228"></a> -<span class="sourceLineNo">229</span> * <p><a name="line.229"></a> -<span class="sourceLineNo">230</span> * Overrides previous calls to {@link Scan#addColumn(byte[], byte[])}for any families in the<a name="line.230"></a> -<span class="sourceLineNo">231</span> * input.<a name="line.231"></a> -<span class="sourceLineNo">232</span> *<a name="line.232"></a> -<span class="sourceLineNo">233</span> * @param scan The Scan to update.<a name="line.233"></a> -<span class="sourceLineNo">234</span> * @param columns array of columns, formatted as <code>family:qualifier</code><a name="line.234"></a> -<span class="sourceLineNo">235</span> * @see Scan#addColumn(byte[], byte[])<a name="line.235"></a> -<span class="sourceLineNo">236</span> */<a name="line.236"></a> -<span class="sourceLineNo">237</span> public static void addColumns(Scan scan, byte [][] columns) {<a name="line.237"></a> -<span class="sourceLineNo">238</span> for (byte[] column : columns) {<a name="line.238"></a> -<span class="sourceLineNo">239</span> addColumn(scan, column);<a name="line.239"></a> -<span class="sourceLineNo">240</span> }<a name="line.240"></a> -<span class="sourceLineNo">241</span> }<a name="line.241"></a> -<span class="sourceLineNo">242</span><a name="line.242"></a> -<span class="sourceLineNo">243</span> /**<a name="line.243"></a> -<span class="sourceLineNo">244</span> * Calculates the splits that will serve as input for the map tasks. The<a name="line.244"></a> -<span class="sourceLineNo">245</span> * number of splits matches the number of regions in a table. Splits are shuffled if<a name="line.245"></a> -<span class="sourceLineNo">246</span> * required.<a name="line.246"></a> -<span class="sourceLineNo">247</span> * @param context The current job context.<a name="line.247"></a> -<span class="sourceLineNo">248</span> * @return The list of input splits.<a name="line.248"></a> -<span class="sourceLineNo">249</span> * @throws IOException When creating the list of splits fails.<a name="line.249"></a> -<span class="sourceLineNo">250</span> * @see org.apache.hadoop.mapreduce.InputFormat#getSplits(<a name="line.250"></a> -<span class="sourceLineNo">251</span> * org.apache.hadoop.mapreduce.JobContext)<a name="line.251"></a> -<span class="sourceLineNo">252</span> */<a name="line.252"></a> -<span class="sourceLineNo">253</span> @Override<a name="line.253"></a> -<span class="sourceLineNo">254</span> public List<InputSplit> getSplits(JobContext context) throws IOException {<a name="line.254"></a> -<span class="sourceLineNo">255</span> List<InputSplit> splits = super.getSplits(context);<a name="line.255"></a> -<span class="sourceLineNo">256</span> if ((conf.get(SHUFFLE_MAPS) != null) && "true".equals(conf.get(SHUFFLE_MAPS).toLowerCase())) {<a name="line.256"></a> -<span class="sourceLineNo">257</span> Collections.shuffle(splits);<a name="line.257"></a> -<span class="sourceLineNo">258</span> }<a name="line.258"></a> -<span class="sourceLineNo">259</span> return splits;<a name="line.259"></a> -<span class="sourceLineNo">260</span> }<a name="line.260"></a> -<span class="sourceLineNo">261</span><a name="line.261"></a> -<span class="sourceLineNo">262</span> /**<a name="line.262"></a> -<span class="sourceLineNo">263</span> * Convenience method to parse a string representation of an array of column specifiers.<a name="line.263"></a> -<span class="sourceLineNo">264</span> *<a name="line.264"></a> -<span class="sourceLineNo">265</span> * @param scan The Scan to update.<a name="line.265"></a> -<span class="sourceLineNo">266</span> * @param columns The columns to parse.<a name="line.266"></a> -<span class="sourceLineNo">267</span> */<a name="line.267"></a> -<span class="sourceLineNo">268</span> private static void addColumns(Scan scan, String columns) {<a name="line.268"></a> -<span class="sourceLineNo">269</span> String[] cols = columns.split(" ");<a name="line.269"></a> -<span class="sourceLineNo">270</span> for (String col : cols) {<a name="line.270"></a> -<span class="sourceLineNo">271</span> addColumn(scan, Bytes.toBytes(col));<a name="line.271"></a> -<span class="sourceLineNo">272</span> }<a name="line.272"></a> -<span class="sourceLineNo">273</span> }<a name="line.273"></a> -<span class="sourceLineNo">274</span><a name="line.274"></a> -<span class="sourceLineNo">275</span> @Override<a name="line.275"></a> -<span class="sourceLineNo">276</span> protected Pair<byte[][], byte[][]> getStartEndKeys() throws IOException {<a name="line.276"></a> -<span class="sourceLineNo">277</span> if (conf.get(SPLIT_TABLE) != null) {<a name="line.277"></a> -<span class="sourceLineNo">278</span> TableName splitTableName = TableName.valueOf(conf.get(SPLIT_TABLE));<a name="line.278"></a> -<span class="sourceLineNo">279</span> try (Connection conn = ConnectionFactory.createConnection(getConf())) {<a name="line.279"></a> -<span class="sourceLineNo">280</span> try (RegionLocator rl = conn.getRegionLocator(splitTableName)) {<a name="line.280"></a> -<span class="sourceLineNo">281</span> return rl.getStartEndKeys();<a name="line.281"></a> -<span class="sourceLineNo">282</span> }<a name="line.282"></a> -<span class="sourceLineNo">283</span> }<a name="line.283"></a> -<span class="sourceLineNo">284</span> }<a name="line.284"></a> -<span class="sourceLineNo">285</span><a name="line.285"></a> -<span class="sourceLineNo">286</span> return super.getStartEndKeys();<a name="line.286"></a> -<span class="sourceLineNo">287</span> }<a name="line.287"></a> -<span class="sourceLineNo">288</span><a name="line.288"></a> -<span class="sourceLineNo">289</span> /**<a name="line.289"></a> -<span class="sourceLineNo">290</span> * Sets split table in map-reduce job.<a name="line.290"></a> -<span class="sourceLineNo">291</span> */<a name="line.291"></a> -<span class="sourceLineNo">292</span> public static void configureSplitTable(Job job, TableName tableName) {<a name="line.292"></a> -<span class="sourceLineNo">293</span> job.getConfiguration().set(SPLIT_TABLE, tableName.getNameAsString());<a name="line.293"></a> -<span class="sourceLineNo">294</span> }<a name="line.294"></a> -<span class="sourceLineNo">295</span>}<a name="line.295"></a> +<span class="sourceLineNo">024</span>import java.util.Locale;<a name="line.24"></a> +<span class="sourceLineNo">025</span><a name="line.25"></a> +<span class="sourceLineNo">026</span>import org.apache.commons.logging.Log;<a name="line.26"></a> +<span class="sourceLineNo">027</span>import org.apache.commons.logging.LogFactory;<a name="line.27"></a> +<span class="sourceLineNo">028</span>import org.apache.hadoop.conf.Configurable;<a name="line.28"></a> +<span class="sourceLineNo">029</span>import org.apache.hadoop.conf.Configuration;<a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.KeyValue;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.TableName;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.classification.InterfaceStability;<a name="line.33"></a> +<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.Connection;<a name="line.34"></a> +<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.ConnectionFactory;<a name="line.35"></a> +<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.RegionLocator;<a name="line.36"></a> +<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.37"></a> +<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.38"></a> +<span class="sourceLineNo">039</span>import org.apache.hadoop.mapreduce.InputSplit;<a name="line.39"></a> +<span class="sourceLineNo">040</span>import org.apache.hadoop.mapreduce.JobContext;<a name="line.40"></a> +<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.41"></a> +<span class="sourceLineNo">042</span>import org.apache.hadoop.mapreduce.Job;<a name="line.42"></a> +<span class="sourceLineNo">043</span>import org.apache.hadoop.util.StringUtils;<a name="line.43"></a> +<span class="sourceLineNo">044</span><a name="line.44"></a> +<span class="sourceLineNo">045</span>/**<a name="line.45"></a> +<span class="sourceLineNo">046</span> * Convert HBase tabular data into a format that is consumable by Map/Reduce.<a name="line.46"></a> +<span class="sourceLineNo">047</span> */<a name="line.47"></a> +<span class="sourceLineNo">048</span>@InterfaceAudience.Public<a name="line.48"></a> +<span class="sourceLineNo">049</span>@InterfaceStability.Stable<a name="line.49"></a> +<span class="sourceLineNo">050</span>public class TableInputFormat extends TableInputFormatBase<a name="line.50"></a> +<span class="sourceLineNo">051</span>implements Configurable {<a name="line.51"></a> +<span class="sourceLineNo">052</span><a name="line.52"></a> +<span class="sourceLineNo">053</span> @SuppressWarnings("hiding")<a name="line.53"></a> +<span class="sourceLineNo">054</span> private static final Log LOG = LogFactory.getLog(TableInputFormat.class);<a name="line.54"></a> +<span class="sourceLineNo">055</span><a name="line.55"></a> +<span class="sourceLineNo">056</span> /** Job parameter that specifies the input table. */<a name="line.56"></a> +<span class="sourceLineNo">057</span> public static final String INPUT_TABLE = "hbase.mapreduce.inputtable";<a name="line.57"></a> +<span class="sourceLineNo">058</span> /**<a name="line.58"></a> +<span class="sourceLineNo">059</span> * If specified, use start keys of this table to split.<a name="line.59"></a> +<span class="sourceLineNo">060</span> * This is useful when you are preparing data for bulkload.<a name="line.60"></a> +<span class="sourceLineNo">061</span> */<a name="line.61"></a> +<span class="sourceLineNo">062</span> private static final String SPLIT_TABLE = "hbase.mapreduce.splittable";<a name="line.62"></a> +<span class="sourceLineNo">063</span> /** Base-64 encoded scanner. All other SCAN_ confs are ignored if this is specified.<a name="line.63"></a> +<span class="sourceLineNo">064</span> * See {@link TableMapReduceUtil#convertScanToString(Scan)} for more details.<a name="line.64"></a> +<span class="sourceLineNo">065</span> */<a name="line.65"></a> +<span class="sourceLineNo">066</span> public static final String SCAN = "hbase.mapreduce.scan";<a name="line.66"></a> +<span class="sourceLineNo">067</span> /** Scan start row */<a name="line.67"></a> +<span class="sourceLineNo">068</span> public static final String SCAN_ROW_START = "hbase.mapreduce.scan.row.start";<a name="line.68"></a> +<span class="sourceLineNo">069</span> /** Scan stop row */<a name="line.69"></a> +<span class="sourceLineNo">070</span> public static final String SCAN_ROW_STOP = "hbase.mapreduce.scan.row.stop";<a name="line.70"></a> +<span class="sourceLineNo">071</span> /** Column Family to Scan */<a name="line.71"></a> +<span class="sourceLineNo">072</span> public static final String SCAN_COLUMN_FAMILY = "hbase.mapreduce.scan.column.family";<a name="line.72"></a> +<span class="sourceLineNo">073</span> /** Space delimited list of columns and column families to scan. */<a name="line.73"></a> +<span class="sourceLineNo">074</span> public static final String SCAN_COLUMNS = "hbase.mapreduce.scan.columns";<a name="line.74"></a> +<span class="sourceLineNo">075</span> /** The timestamp used to filter columns with a specific timestamp. */<a name="line.75"></a> +<span class="sourceLineNo">076</span> public static final String SCAN_TIMESTAMP = "hbase.mapreduce.scan.timestamp";<a name="line.76"></a> +<span class="sourceLineNo">077</span> /** The starting timestamp used to filter columns with a specific range of versions. */<a name="line.77"></a> +<span class="sourceLineNo">078</span> public static final String SCAN_TIMERANGE_START = "hbase.mapreduce.scan.timerange.start";<a name="line.78"></a> +<span class="sourceLineNo">079</span> /** The ending timestamp used to filter columns with a specific range of versions. */<a name="line.79"></a> +<span class="sourceLineNo">080</span> public static final String SCAN_TIMERANGE_END = "hbase.mapreduce.scan.timerange.end";<a name="line.80"></a> +<span class="sourceLineNo">081</span> /** The maximum number of version to return. */<a name="line.81"></a> +<span class="sourceLineNo">082</span> public static final String SCAN_MAXVERSIONS = "hbase.mapreduce.scan.maxversions";<a name="line.82"></a> +<span class="sourceLineNo">083</span> /** Set to false to disable server-side caching of blocks for this scan. */<a name="line.83"></a> +<span class="sourceLineNo">084</span> public static final String SCAN_CACHEBLOCKS = "hbase.mapreduce.scan.cacheblocks";<a name="line.84"></a> +<span class="sourceLineNo">085</span> /** The number of rows for caching that will be passed to scanners. */<a name="line.85"></a> +<span class="sourceLineNo">086</span> public static final String SCAN_CACHEDROWS = "hbase.mapreduce.scan.cachedrows";<a name="line.86"></a> +<span class="sourceLineNo">087</span> /** Set the maximum number of values to return for each call to next(). */<a name="line.87"></a> +<span class="sourceLineNo">088</span> public static final String SCAN_BATCHSIZE = "hbase.mapreduce.scan.batchsize";<a name="line.88"></a> +<span class="sourceLineNo">089</span> /** Specify if we have to shuffle the map tasks. */<a name="line.89"></a> +<span class="sourceLineNo">090</span> public static final String SHUFFLE_MAPS = "hbase.mapreduce.inputtable.shufflemaps";<a name="line.90"></a> +<span class="sourceLineNo">091</span><a name="line.91"></a> +<span class="sourceLineNo">092</span> /** The configuration. */<a name="line.92"></a> +<span class="sourceLineNo">093</span> private Configuration conf = null;<a name="line.93"></a> +<span class="sourceLineNo">094</span><a name="line.94"></a> +<span class="sourceLineNo">095</span> /**<a name="line.95"></a> +<span class="sourceLineNo">096</span> * Returns the current configuration.<a name="line.96"></a> +<span class="sourceLineNo">097</span> *<a name="line.97"></a> +<span class="sourceLineNo">098</span> * @return The current configuration.<a name="line.98"></a> +<span class="sourceLineNo">099</span> * @see org.apache.hadoop.conf.Configurable#getConf()<a name="line.99"></a> +<span class="sourceLineNo">100</span> */<a name="line.100"></a> +<span class="sourceLineNo">101</span> @Override<a name="line.101"></a> +<span class="sourceLineNo">102</span> public Configuration getConf() {<a name="line.102"></a> +<span class="sourceLineNo">103</span> return conf;<a name="line.103"></a> +<span class="sourceLineNo">104</span> }<a name="line.104"></a> +<span class="sourceLineNo">105</span><a name="line.105"></a> +<span class="sourceLineNo">106</span> /**<a name="line.106"></a> +<span class="sourceLineNo">107</span> * Sets the configuration. This is used to set the details for the table to<a name="line.107"></a> +<span class="sourceLineNo">108</span> * be scanned.<a name="line.108"></a> +<span class="sourceLineNo">109</span> *<a name="line.109"></a> +<span class="sourceLineNo">110</span> * @param configuration The configuration to set.<a name="line.110"></a> +<span class="sourceLineNo">111</span> * @see org.apache.hadoop.conf.Configurable#setConf(<a name="line.111"></a> +<span class="sourceLineNo">112</span> * org.apache.hadoop.conf.Configuration)<a name="line.112"></a> +<span class="sourceLineNo">113</span> */<a name="line.113"></a> +<span class="sourceLineNo">114</span> @Override<a name="line.114"></a> +<span class="sourceLineNo">115</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="REC_CATCH_EXCEPTION",<a name="line.115"></a> +<span class="sourceLineNo">116</span> justification="Intentional")<a name="line.116"></a> +<span class="sourceLineNo">117</span> public void setConf(Configuration configuration) {<a name="line.117"></a> +<span class="sourceLineNo">118</span> this.conf = configuration;<a name="line.118"></a> +<span class="sourceLineNo">119</span><a name="line.119"></a> +<span class="sourceLineNo">120</span> Scan scan = null;<a name="line.120"></a> +<span class="sourceLineNo">121</span><a name="line.121"></a> +<span class="sourceLineNo">122</span> if (conf.get(SCAN) != null) {<a name="line.122"></a> +<span class="sourceLineNo">123</span> try {<a name="line.123"></a> +<span class="sourceLineNo">124</span> scan = TableMapReduceUtil.convertStringToScan(conf.get(SCAN));<a name="line.124"></a> +<span class="sourceLineNo">125</span> } catch (IOException e) {<a name="line.125"></a> +<span class="sourceLineNo">126</span> LOG.error("An error occurred.", e);<a name="line.126"></a> +<span class="sourceLineNo">127</span> }<a name="line.127"></a> +<span class="sourceLineNo">128</span> } else {<a name="line.128"></a> +<span class="sourceLineNo">129</span> try {<a name="line.129"></a> +<span class="sourceLineNo">130</span> scan = createScanFromConfiguration(conf);<a name="line.130"></a> +<span class="sourceLineNo">131</span> } catch (Exception e) {<a name="line.131"></a> +<span class="sourceLineNo">132</span> LOG.error(StringUtils.stringifyException(e));<a name="line.132"></a> +<span class="sourceLineNo">133</span> }<a name="line.133"></a> +<span class="sourceLineNo">134</span> }<a name="line.134"></a> +<span class="sourceLineNo">135</span><a name="line.135"></a> +<span class="sourceLineNo">136</span> setScan(scan);<a name="line.136"></a> +<span class="sourceLineNo">137</span> }<a name="line.137"></a> +<span class="sourceLineNo">138</span><a name="line.138"></a> +<span class="sourceLineNo">139</span> /**<a name="line.139"></a> +<span class="sourceLineNo">140</span> * Sets up a {@link Scan} instance, applying settings from the configuration property<a name="line.140"></a> +<span class="sourceLineNo">141</span> * constants defined in {@code TableInputFormat}. This allows specifying things such as:<a name="line.141"></a> +<span class="sourceLineNo">142</span> * <ul><a name="line.142"></a> +<span class="sourceLineNo">143</span> * <li>start and stop rows</li><a name="line.143"></a> +<span class="sourceLineNo">144</span> * <li>column qualifiers or families</li><a name="line.144"></a> +<span class="sourceLineNo">145</span> * <li>timestamps or timerange</li><a name="line.145"></a> +<span class="sourceLineNo">146</span> * <li>scanner caching and batch size</li><a name="line.146"></a> +<span class="sourceLineNo">147</span> * </ul><a name="line.147"></a> +<span class="sourceLineNo">148</span> */<a name="line.148"></a> +<span class="sourceLineNo">149</span> public static Scan createScanFromConfiguration(Configuration conf) throws IOException {<a name="line.149"></a> +<span class="sourceLineNo">150</span> Scan scan = new Scan();<a name="line.150"></a> +<span class="sourceLineNo">151</span><a name="line.151"></a> +<span class="sourceLineNo">152</span> if (conf.get(SCAN_ROW_START) != null) {<a name="line.152"></a> +<span class="sourceLineNo">153</span> scan.setStartRow(Bytes.toBytesBinary(conf.get(SCAN_ROW_START)));<a name="line.153"></a> +<span class="sourceLineNo">154</span> }<a name="line.154"></a> +<span class="sourceLineNo">155</span><a name="line.155"></a> +<span class="sourceLineNo">156</span> if (conf.get(SCAN_ROW_STOP) != null) {<a name="line.156"></a> +<span class="sourceLineNo">157</span> scan.setStopRow(Bytes.toBytesBinary(conf.get(SCAN_ROW_STOP)));<a name="line.157"></a> +<span class="sourceLineNo">158</span> }<a name="line.158"></a> +<span class="sourceLineNo">159</span><a name="line.159"></a> +<span class="sourceLineNo">160</span> if (conf.get(SCAN_COLUMNS) != null) {<a name="line.160"></a> +<span class="sourceLineNo">161</span> addColumns(scan, conf.get(SCAN_COLUMNS));<a name="line.161"></a> +<span class="sourceLineNo">162</span> }<a name="line.162"></a> +<span class="sourceLineNo">163</span><a name="line.163"></a> +<span class="sourceLineNo">164</span> if (conf.get(SCAN_COLUMN_FAMILY) != null) {<a name="line.164"></a> +<span class="sourceLineNo">165</span> scan.addFamily(Bytes.toBytes(conf.get(SCAN_COLUMN_FAMILY)));<a name="line.165"></a> +<span class="sourceLineNo">166</span> }<a name="line.166"></a> +<span class="sourceLineNo">167</span><a name="line.167"></a> +<span class="sourceLineNo">168</span> if (conf.get(SCAN_TIMESTAMP) != null) {<a name="line.168"></a> +<span class="sourceLineNo">169</span> scan.setTimeStamp(Long.parseLong(conf.get(SCAN_TIMESTAMP)));<a name="line.169"></a> +<span class="sourceLineNo">170</span> }<a name="line.170"></a> +<span class="sourceLineNo">171</span><a name="line.171"></a> +<span class="sourceLineNo">172</span> if (conf.get(SCAN_TIMERANGE_START) != null && conf.get(SCAN_TIMERANGE_END) != null) {<a name="line.172"></a> +<span class="sourceLineNo">173</span> scan.setTimeRange(<a name="line.173"></a> +<span class="sourceLineNo">174</span> Long.parseLong(conf.get(SCAN_TIMERANGE_START)),<a name="line.174"></a> +<span class="sourceLineNo">175</span> Long.parseLong(conf.get(SCAN_TIMERANGE_END)));<a name="line.175"></a> +<span class="sourceLineNo">176</span> }<a name="line.176"></a> +<span class="sourceLineNo">177</span><a name="line.177"></a> +<span class="sourceLineNo">178</span> if (conf.get(SCAN_MAXVERSIONS) != null) {<a name="line.178"></a> +<span class="sourceLineNo">179</span> scan.setMaxVersions(Integer.parseInt(conf.get(SCAN_MAXVERSIONS)));<a name="line.179"></a> +<span class="sourceLineNo">180</span> }<a name="line.180"></a> +<span class="sourceLineNo">181</span><a name="line.181"></a> +<span class="sourceLineNo">182</span> if (conf.get(SCAN_CACHEDROWS) != null) {<a name="line.182"></a> +<span class="sourceLineNo">183</span> scan.setCaching(Integer.parseInt(conf.get(SCAN_CACHEDROWS)));<a name="line.183"></a> +<span class="sourceLineNo">184</span> }<a name="line.184"></a> +<span class="sourceLineNo">185</span><a 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protected void initialize(JobContext context) throws IOException {<a name="line.197"></a> +<span class="sourceLineNo">198</span> // Do we have to worry about mis-matches between the Configuration from setConf and the one<a name="line.198"></a> +<span class="sourceLineNo">199</span> // in this context?<a name="line.199"></a> +<span class="sourceLineNo">200</span> TableName tableName = TableName.valueOf(conf.get(INPUT_TABLE));<a name="line.200"></a> +<span class="sourceLineNo">201</span> try {<a name="line.201"></a> +<span class="sourceLineNo">202</span> initializeTable(ConnectionFactory.createConnection(new Configuration(conf)), tableName);<a name="line.202"></a> +<span class="sourceLineNo">203</span> } catch (Exception e) {<a name="line.203"></a> +<span class="sourceLineNo">204</span> LOG.error(StringUtils.stringifyException(e));<a name="line.204"></a> +<span class="sourceLineNo">205</span> }<a name="line.205"></a> +<span class="sourceLineNo">206</span> }<a name="line.206"></a> +<span class="sourceLineNo">207</span><a name="line.207"></a> +<span class="sourceLineNo">208</span> /**<a name="line.208"></a> +<span class="sourceLineNo">209</span> * Parses a combined family and qualifier and adds either both or just the<a name="line.209"></a> +<span class="sourceLineNo">210</span> * family in case there is no qualifier. This assumes the older colon<a name="line.210"></a> +<span class="sourceLineNo">211</span> * divided notation, e.g. "family:qualifier".<a name="line.211"></a> +<span class="sourceLineNo">212</span> *<a name="line.212"></a> +<span class="sourceLineNo">213</span> * @param scan The Scan to update.<a name="line.213"></a> +<span class="sourceLineNo">214</span> * @param familyAndQualifier family and qualifier<a name="line.214"></a> +<span class="sourceLineNo">215</span> * @throws IllegalArgumentException When familyAndQualifier is invalid.<a name="line.215"></a> +<span class="sourceLineNo">216</span> */<a name="line.216"></a> +<span class="sourceLineNo">217</span> private static void addColumn(Scan scan, byte[] familyAndQualifier) {<a name="line.217"></a> +<span class="sourceLineNo">218</span> byte [][] fq = KeyValue.parseColumn(familyAndQualifier);<a name="line.218"></a> +<span class="sourceLineNo">219</span> if (fq.length == 1) {<a name="line.219"></a> +<span class="sourceLineNo">220</span> scan.addFamily(fq[0]);<a name="line.220"></a> +<span class="sourceLineNo">221</span> } else if (fq.length == 2) {<a name="line.221"></a> +<span class="sourceLineNo">222</span> scan.addColumn(fq[0], fq[1]);<a name="line.222"></a> +<span class="sourceLineNo">223</span> } else {<a name="line.223"></a> +<span class="sourceLineNo">224</span> throw new IllegalArgumentException("Invalid familyAndQualifier provided.");<a name="line.224"></a> +<span class="sourceLineNo">225</span> }<a name="line.225"></a> +<span class="sourceLineNo">226</span> }<a name="line.226"></a> +<span class="sourceLineNo">227</span><a name="line.227"></a> +<span class="sourceLineNo">228</span> /**<a name="line.228"></a> +<span class="sourceLineNo">229</span> * Adds an array of columns specified using old format, family:qualifier.<a name="line.229"></a> +<span class="sourceLineNo">230</span> * <p><a name="line.230"></a> +<span class="sourceLineNo">231</span> * Overrides previous calls to {@link Scan#addColumn(byte[], byte[])}for any families in the<a name="line.231"></a> +<span class="sourceLineNo">232</span> * input.<a name="line.232"></a> +<span class="sourceLineNo">233</span> *<a name="line.233"></a> +<span class="sourceLineNo">234</span> * @param scan The Scan to update.<a name="line.234"></a> +<span class="sourceLineNo">235</span> * @param columns array of columns, formatted as <code>family:qualifier</code><a name="line.235"></a> +<span class="sourceLineNo">236</span> * @see Scan#addColumn(byte[], byte[])<a name="line.236"></a> +<span class="sourceLineNo">237</span> */<a name="line.237"></a> +<span class="sourceLineNo">238</span> public static void addColumns(Scan scan, byte [][] columns) {<a name="line.238"></a> +<span class="sourceLineNo">239</span> for (byte[] column : columns) {<a name="line.239"></a> +<span class="sourceLineNo">240</span> addColumn(scan, column);<a name="line.240"></a> +<span class="sourceLineNo">241</span> }<a name="line.241"></a> +<span class="sourceLineNo">242</span> }<a name="line.242"></a> +<span class="sourceLineNo">243</span><a name="line.243"></a> +<span class="sourceLineNo">244</span> /**<a name="line.244"></a> +<span class="sourceLineNo">245</span> * Calculates the splits that will serve as input for the map tasks. The<a name="line.245"></a> +<span class="sourceLineNo">246</span> * number of splits matches the number of regions in a table. Splits are shuffled if<a name="line.246"></a> +<span class="sourceLineNo">247</span> * required.<a name="line.247"></a> +<span class="sourceLineNo">248</span> * @param context The current job context.<a name="line.248"></a> +<span class="sourceLineNo">249</span> * @return The list of input splits.<a name="line.249"></a> +<span class="sourceLineNo">250</span> * @throws IOException When creating the list of splits fails.<a name="line.250"></a> +<span class="sourceLineNo">251</span> * @see org.apache.hadoop.mapreduce.InputFormat#getSplits(<a name="line.251"></a> +<span class="sourceLineNo">252</span> * org.apache.hadoop.mapreduce.JobContext)<a name="line.252"></a> +<span class="sourceLineNo">253</span> */<a name="line.253"></a> +<span class="sourceLineNo">254</span> @Override<a name="line.254"></a> +<span class="sourceLineNo">255</span> public List<InputSplit> getSplits(JobContext context) throws IOException {<a name="line.255"></a> +<span class="sourceLineNo">256</span> List<InputSplit> splits = super.getSplits(context);<a name="line.256"></a> +<span class="sourceLineNo">257</span> if ((conf.get(SHUFFLE_MAPS) != null) && "true".equals(conf.get(SHUFFLE_MAPS).toLowerCase(Locale.ROOT))) {<a name="line.257"></a> +<span class="sourceLineNo">258</span> Collections.shuffle(splits);<a name="line.258"></a> +<span class="sourceLineNo">259</span> }<a name="line.259"></a> +<span class="sourceLineNo">260</span> return splits;<a name="line.260"></a> +<span class="sourceLineNo">261</span> }<a name="line.261"></a> +<span class="sourceLineNo">262</span><a name="line.262"></a> +<span class="sourceLineNo">263</span> /**<a name="line.263"></a> +<span class="sourceLineNo">264</span> * Convenience method to parse a string representation of an array of column specifiers.<a name="line.264"></a> +<span class="sourceLineNo">265</span> *<a name="line.265"></a> +<span class="sourceLineNo">266</span> * @param scan The Scan to update.<a name="line.266"></a> +<span class="sourceLineNo">267</span> * @param columns The columns to parse.<a name="line.267"></a> +<span class="sourceLineNo">268</span> */<a name="line.268"></a> +<span class="sourceLineNo">269</span> private static void addColumns(Scan scan, String columns) {<a name="line.269"></a> +<span class="sourceLineNo">270</span> String[] cols = columns.split(" ");<a name="line.270"></a> +<span class="sourceLineNo">271</span> for (String col : cols) {<a name="line.271"></a> +<span class="sourceLineNo">272</span> addColumn(scan, Bytes.toBytes(col));<a name="line.272"></a> +<span class="sourceLineNo">273</span> }<a name="line.273"></a> +<span class="sourceLineNo">274</span> }<a name="line.274"></a> +<span class="sourceLineNo">275</span><a name="line.275"></a> +<span class="sourceLineNo">276</span> @Override<a name="line.276"></a> +<span class="sourceLineNo">277</span> protected Pair<byte[][], byte[][]> getStartEndKeys() throws IOException {<a name="line.277"></a> +<span class="sourceLineNo">278</span> if (conf.get(SPLIT_TABLE) != null) {<a name="line.278"></a> +<span class="sourceLineNo">279</span> TableName splitTableName = TableName.valueOf(conf.get(SPLIT_TABLE));<a name="line.279"></a> +<span class="sourceLineNo">280</span> try (Connection conn = ConnectionFactory.createConnection(getConf())) {<a name="line.280"></a> +<span class="sourceLineNo">281</span> try (RegionLocator rl = conn.getRegionLocator(splitTableName)) {<a name="line.281"></a> +<span class="sourceLineNo">282</span> return rl.getStartEndKeys();<a name="line.282"></a> +<span class="sourceLineNo">283</span> }<a name="line.283"></a> +<span class="sourceLineNo">284</span> }<a name="line.284"></a> +<span class="sourceLineNo">285</span> }<a name="line.285"></a> +<span class="sourceLineNo">286</span><a name="line.286"></a> +<span class="sourceLineNo">287</span> return super.getStartEndKeys();<a name="line.287"></a> +<span class="sourceLineNo">288</span> }<a name="line.288"></a> +<span class="sourceLineNo">289</span><a name="line.289"></a> +<span class="sourceLineNo">290</span> /**<a name="line.290"></a> +<span class="sourceLineNo">291</span> * Sets split table in map-reduce job.<a name="line.291"></a> +<span class="sourceLineNo">292</span> */<a name="line.292"></a> +<span class="sourceLineNo">293</span> public static void configureSplitTable(Job job, TableName tableName) {<a name="line.293"></a> +<span class="sourceLineNo">294</span> job.getConfiguration().set(SPLIT_TABLE, tableName.getNameAsString());<a name="line.294"></a> +<span class="sourceLineNo">295</span> }<a name="line.295"></a> +<span class="sourceLineNo">296</span>}<a name="line.296"></a>
