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7AggregateWordCount (Hadoop 0.20.1 API)
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91org.apache.hadoop.examples</FONT>
92<BR>
93Class AggregateWordCount</H2>
94<PRE>
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>
96  <IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.hadoop.examples.AggregateWordCount</B>
97</PRE>
98<HR>
99<DL>
100<DT><PRE>public class <B>AggregateWordCount</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
101</PRE>
102
103<P>
104This is an example Aggregated Hadoop Map/Reduce application. It reads the
105 text input files, breaks each line into words and counts them. The output is
106 a locally sorted list of words and the count of how often they occurred.
107 
108 To run: bin/hadoop jar hadoop-*-examples.jar aggregatewordcount <i>in-dir</i>
109 <i>out-dir</i> <i>numOfReducers</i> textinputformat
110<P>
111
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126<CODE>static&nbsp;class</CODE></FONT></TD>
127<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/AggregateWordCount.WordCountPlugInClass.html" title="class in org.apache.hadoop.examples">AggregateWordCount.WordCountPlugInClass</A></B></CODE>
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143<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/AggregateWordCount.html#AggregateWordCount()">AggregateWordCount</A></B>()</CODE>
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160<CODE>static&nbsp;void</CODE></FONT></TD>
161<TD><CODE><B><A HREF="../../../../org/apache/hadoop/examples/AggregateWordCount.html#main(java.lang.String[])">main</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[]&nbsp;args)</CODE>
162
163<BR>
164&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The main driver for word count map/reduce program.</TD>
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189<A NAME="AggregateWordCount()"><!-- --></A><H3>
190AggregateWordCount</H3>
191<PRE>
192public <B>AggregateWordCount</B>()</PRE>
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206<A NAME="main(java.lang.String[])"><!-- --></A><H3>
207main</H3>
208<PRE>
209public static void <B>main</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>[]&nbsp;args)
210                 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>
211<DL>
212<DD>The main driver for word count map/reduce program. Invoke this method to
213 submit the map/reduce job.
214<P>
215<DD><DL>
216
217<DT><B>Throws:</B>
218<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> - When there is communication problems with the job tracker.</DL>
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