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91 | org.apache.hadoop.mapred.lib</FONT> |
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92 | <BR> |
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93 | Class RegexMapper<K></H2> |
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94 | <PRE> |
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95 | <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A> |
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104 | <DT><PRE>public class <B>RegexMapper<K></B><DT>extends <A HREF="../../../../../org/apache/hadoop/mapred/MapReduceBase.html" title="class in org.apache.hadoop.mapred">MapReduceBase</A><DT>implements <A HREF="../../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred">Mapper</A><K,<A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>></DL> |
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105 | </PRE> |
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106 | |
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107 | <P> |
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108 | A <A HREF="../../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred"><CODE>Mapper</CODE></A> that extracts text matching a regular expression. |
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109 | <P> |
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125 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/RegexMapper.html#RegexMapper()">RegexMapper</A></B>()</CODE> |
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126 | |
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142 | <CODE> void</CODE></FONT></TD> |
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143 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/RegexMapper.html#configure(org.apache.hadoop.mapred.JobConf)">configure</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> job)</CODE> |
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144 | |
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145 | <BR> |
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146 | Default implementation that does nothing.</TD> |
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147 | </TR> |
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148 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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149 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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150 | <CODE> void</CODE></FONT></TD> |
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151 | <TD><CODE><B><A HREF="../../../../../org/apache/hadoop/mapred/lib/RegexMapper.html#map(K, org.apache.hadoop.io.Text, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)">map</A></B>(<A HREF="../../../../../org/apache/hadoop/mapred/lib/RegexMapper.html" title="type parameter in RegexMapper">K</A> key, |
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152 | <A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A> value, |
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153 | <A HREF="../../../../../org/apache/hadoop/mapred/OutputCollector.html" title="interface in org.apache.hadoop.mapred">OutputCollector</A><<A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>> output, |
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154 | <A HREF="../../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A> reporter)</CODE> |
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155 | |
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156 | <BR> |
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157 | Maps a single input key/value pair into an intermediate key/value pair.</TD> |
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158 | </TR> |
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159 | </TABLE> |
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160 | <A NAME="methods_inherited_from_class_org.apache.hadoop.mapred.MapReduceBase"><!-- --></A> |
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163 | <TH ALIGN="left"><B>Methods inherited from class org.apache.hadoop.mapred.<A HREF="../../../../../org/apache/hadoop/mapred/MapReduceBase.html" title="class in org.apache.hadoop.mapred">MapReduceBase</A></B></TH> |
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197 | </TR> |
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198 | </TABLE> |
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199 | |
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200 | <A NAME="RegexMapper()"><!-- --></A><H3> |
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201 | RegexMapper</H3> |
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202 | <PRE> |
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203 | public <B>RegexMapper</B>()</PRE> |
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204 | <DL> |
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205 | </DL> |
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215 | </TABLE> |
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216 | |
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217 | <A NAME="configure(org.apache.hadoop.mapred.JobConf)"><!-- --></A><H3> |
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218 | configure</H3> |
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219 | <PRE> |
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220 | public void <B>configure</B>(<A HREF="../../../../../org/apache/hadoop/mapred/JobConf.html" title="class in org.apache.hadoop.mapred">JobConf</A> job)</PRE> |
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221 | <DL> |
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222 | <DD><B>Description copied from class: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/MapReduceBase.html#configure(org.apache.hadoop.mapred.JobConf)">MapReduceBase</A></CODE></B></DD> |
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223 | <DD>Default implementation that does nothing. |
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224 | <P> |
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225 | <DD><DL> |
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226 | <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/JobConfigurable.html#configure(org.apache.hadoop.mapred.JobConf)">configure</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/JobConfigurable.html" title="interface in org.apache.hadoop.mapred">JobConfigurable</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/MapReduceBase.html#configure(org.apache.hadoop.mapred.JobConf)">configure</A></CODE> in class <CODE><A HREF="../../../../../org/apache/hadoop/mapred/MapReduceBase.html" title="class in org.apache.hadoop.mapred">MapReduceBase</A></CODE></DL> |
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227 | </DD> |
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228 | <DD><DL> |
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229 | <DT><B>Parameters:</B><DD><CODE>job</CODE> - the configuration</DL> |
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230 | </DD> |
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231 | </DL> |
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232 | <HR> |
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233 | |
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234 | <A NAME="map(java.lang.Object,org.apache.hadoop.io.Text,org.apache.hadoop.mapred.OutputCollector,org.apache.hadoop.mapred.Reporter)"><!-- --></A><A NAME="map(K, org.apache.hadoop.io.Text, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)"><!-- --></A><H3> |
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235 | map</H3> |
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236 | <PRE> |
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237 | public void <B>map</B>(<A HREF="../../../../../org/apache/hadoop/mapred/lib/RegexMapper.html" title="type parameter in RegexMapper">K</A> key, |
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238 | <A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A> value, |
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239 | <A HREF="../../../../../org/apache/hadoop/mapred/OutputCollector.html" title="interface in org.apache.hadoop.mapred">OutputCollector</A><<A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>> output, |
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240 | <A HREF="../../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A> reporter) |
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241 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></PRE> |
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242 | <DL> |
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243 | <DD><B>Description copied from interface: <CODE><A HREF="../../../../../org/apache/hadoop/mapred/Mapper.html#map(K1, V1, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)">Mapper</A></CODE></B></DD> |
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244 | <DD>Maps a single input key/value pair into an intermediate key/value pair. |
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245 | |
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246 | <p>Output pairs need not be of the same types as input pairs. A given |
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247 | input pair may map to zero or many output pairs. Output pairs are |
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248 | collected with calls to |
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249 | <A HREF="../../../../../org/apache/hadoop/mapred/OutputCollector.html#collect(K, V)"><CODE>OutputCollector.collect(Object,Object)</CODE></A>.</p> |
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250 | |
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251 | <p>Applications can use the <A HREF="../../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred"><CODE>Reporter</CODE></A> provided to report progress |
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252 | or just indicate that they are alive. In scenarios where the application |
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253 | takes an insignificant amount of time to process individual key/value |
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254 | pairs, this is crucial since the framework might assume that the task has |
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255 | timed-out and kill that task. The other way of avoiding this is to set |
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256 | <a href="../../../../../../mapred-default.html#mapred.task.timeout"> |
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257 | mapred.task.timeout</a> to a high-enough value (or even zero for no |
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258 | time-outs).</p> |
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259 | <P> |
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260 | <DD><DL> |
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261 | <DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/mapred/Mapper.html#map(K1, V1, org.apache.hadoop.mapred.OutputCollector, org.apache.hadoop.mapred.Reporter)">map</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred">Mapper</A><<A HREF="../../../../../org/apache/hadoop/mapred/lib/RegexMapper.html" title="type parameter in RegexMapper">K</A>,<A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../org/apache/hadoop/io/Text.html" title="class in org.apache.hadoop.io">Text</A>,<A HREF="../../../../../org/apache/hadoop/io/LongWritable.html" title="class in org.apache.hadoop.io">LongWritable</A>></CODE></DL> |
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262 | </DD> |
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263 | <DD><DL> |
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264 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - the input key.<DD><CODE>value</CODE> - the input value.<DD><CODE>output</CODE> - collects mapped keys and values.<DD><CODE>reporter</CODE> - facility to report progress. |
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265 | <DT><B>Throws:</B> |
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266 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</A></CODE></DL> |
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267 | </DD> |
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