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| 5 | <!-- Generated by javadoc (build 1.6.0_07) on Tue Sep 01 20:56:56 UTC 2009 --> |
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| 7 | Reporter (Hadoop 0.20.1 API) |
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| 58 | <A HREF="../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred"><B>PREV CLASS</B></A> |
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| 77 | <TR> |
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| 78 | <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> |
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| 79 | SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD> |
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| 80 | <TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> |
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| 81 | DETAIL: <A HREF="#field_detail">FIELD</A> | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD> |
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| 85 | <!-- ========= END OF TOP NAVBAR ========= --> |
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| 86 | |
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| 87 | <HR> |
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| 88 | <!-- ======== START OF CLASS DATA ======== --> |
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| 89 | <H2> |
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| 90 | <FONT SIZE="-1"> |
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| 91 | org.apache.hadoop.mapred</FONT> |
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| 92 | <BR> |
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| 93 | Interface Reporter</H2> |
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| 94 | <DL> |
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| 95 | <DT><B>All Superinterfaces:</B> <DD><A HREF="../../../../org/apache/hadoop/util/Progressable.html" title="interface in org.apache.hadoop.util">Progressable</A></DD> |
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| 96 | </DL> |
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| 97 | <HR> |
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| 98 | <DL> |
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| 99 | <DT><PRE>public interface <B>Reporter</B><DT>extends <A HREF="../../../../org/apache/hadoop/util/Progressable.html" title="interface in org.apache.hadoop.util">Progressable</A></DL> |
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| 100 | </PRE> |
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| 101 | |
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| 102 | <P> |
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| 103 | A facility for Map-Reduce applications to report progress and update |
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| 104 | counters, status information etc. |
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| 105 | |
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| 106 | <p><A HREF="../../../../org/apache/hadoop/mapred/Mapper.html" title="interface in org.apache.hadoop.mapred"><CODE>Mapper</CODE></A> and <A HREF="../../../../org/apache/hadoop/mapred/Reducer.html" title="interface in org.apache.hadoop.mapred"><CODE>Reducer</CODE></A> can use the <code>Reporter</code> |
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| 107 | provided to report progress or just indicate that they are alive. In |
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| 108 | scenarios where the application takes an insignificant amount of time to |
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| 109 | process individual key/value pairs, this is crucial since the framework |
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| 110 | might assume that the task has timed-out and kill that task. |
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| 111 | |
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| 112 | <p>Applications can also update <A HREF="../../../../org/apache/hadoop/mapred/Counters.html" title="class in org.apache.hadoop.mapred"><CODE>Counters</CODE></A> via the provided |
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| 113 | <code>Reporter</code> .</p> |
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| 114 | <P> |
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| 115 | |
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| 116 | <P> |
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| 117 | <DL> |
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| 118 | <DT><B>See Also:</B><DD><A HREF="../../../../org/apache/hadoop/util/Progressable.html" title="interface in org.apache.hadoop.util"><CODE>Progressable</CODE></A>, |
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| 119 | <A HREF="../../../../org/apache/hadoop/mapred/Counters.html" title="class in org.apache.hadoop.mapred"><CODE>Counters</CODE></A></DL> |
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| 120 | <HR> |
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| 121 | |
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| 122 | <P> |
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| 123 | <!-- =========== FIELD SUMMARY =========== --> |
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| 124 | |
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| 125 | <A NAME="field_summary"><!-- --></A> |
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| 126 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 127 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 128 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 129 | <B>Field Summary</B></FONT></TH> |
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| 130 | </TR> |
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| 131 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 132 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 133 | <CODE>static <A HREF="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A></CODE></FONT></TD> |
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| 134 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/Reporter.html#NULL">NULL</A></B></CODE> |
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| 135 | |
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| 136 | <BR> |
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| 137 | A constant of Reporter type that does nothing.</TD> |
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| 138 | </TR> |
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| 139 | </TABLE> |
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| 140 | |
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| 141 | <!-- ========== METHOD SUMMARY =========== --> |
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| 142 | |
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| 143 | <A NAME="method_summary"><!-- --></A> |
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| 144 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 145 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 146 | <TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> |
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| 147 | <B>Method Summary</B></FONT></TH> |
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| 148 | </TR> |
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| 149 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 150 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 151 | <CODE> <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred">Counters.Counter</A></CODE></FONT></TD> |
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| 152 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/Reporter.html#getCounter(java.lang.Enum)">getCounter</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</A><?> name)</CODE> |
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| 153 | |
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| 154 | <BR> |
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| 155 | Get the <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred"><CODE>Counters.Counter</CODE></A> of the given group with the given name.</TD> |
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| 156 | </TR> |
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| 157 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 158 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 159 | <CODE> <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred">Counters.Counter</A></CODE></FONT></TD> |
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| 160 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/Reporter.html#getCounter(java.lang.String, java.lang.String)">getCounter</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> group, |
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| 161 | <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> name)</CODE> |
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| 162 | |
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| 163 | <BR> |
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| 164 | Get the <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred"><CODE>Counters.Counter</CODE></A> of the given group with the given name.</TD> |
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| 165 | </TR> |
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| 166 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 167 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 168 | <CODE> <A HREF="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</A></CODE></FONT></TD> |
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| 169 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/Reporter.html#getInputSplit()">getInputSplit</A></B>()</CODE> |
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| 170 | |
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| 171 | <BR> |
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| 172 | Get the <A HREF="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><CODE>InputSplit</CODE></A> object for a map.</TD> |
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| 173 | </TR> |
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| 174 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 175 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 176 | <CODE> void</CODE></FONT></TD> |
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| 177 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/Reporter.html#incrCounter(java.lang.Enum, long)">incrCounter</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</A><?> key, |
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| 178 | long amount)</CODE> |
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| 179 | |
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| 180 | <BR> |
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| 181 | Increments the counter identified by the key, which can be of |
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| 182 | any <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><CODE>Enum</CODE></A> type, by the specified amount.</TD> |
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| 183 | </TR> |
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| 184 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 185 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 186 | <CODE> void</CODE></FONT></TD> |
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| 187 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/Reporter.html#incrCounter(java.lang.String, java.lang.String, long)">incrCounter</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> group, |
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| 188 | <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> counter, |
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| 189 | long amount)</CODE> |
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| 190 | |
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| 191 | <BR> |
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| 192 | Increments the counter identified by the group and counter name |
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| 193 | by the specified amount.</TD> |
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| 194 | </TR> |
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| 195 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 196 | <TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> |
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| 197 | <CODE> void</CODE></FONT></TD> |
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| 198 | <TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapred/Reporter.html#setStatus(java.lang.String)">setStatus</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> status)</CODE> |
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| 199 | |
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| 200 | <BR> |
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| 201 | Set the status description for the task.</TD> |
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| 202 | </TR> |
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| 203 | </TABLE> |
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| 204 | <A NAME="methods_inherited_from_class_org.apache.hadoop.util.Progressable"><!-- --></A> |
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| 205 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 206 | <TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> |
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| 207 | <TH ALIGN="left"><B>Methods inherited from interface org.apache.hadoop.util.<A HREF="../../../../org/apache/hadoop/util/Progressable.html" title="interface in org.apache.hadoop.util">Progressable</A></B></TH> |
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| 208 | </TR> |
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| 209 | <TR BGCOLOR="white" CLASS="TableRowColor"> |
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| 210 | <TD><CODE><A HREF="../../../../org/apache/hadoop/util/Progressable.html#progress()">progress</A></CODE></TD> |
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| 211 | </TR> |
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| 212 | </TABLE> |
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| 213 | |
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| 214 | <P> |
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| 215 | |
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| 216 | <!-- ============ FIELD DETAIL =========== --> |
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| 217 | |
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| 218 | <A NAME="field_detail"><!-- --></A> |
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| 219 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 220 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 221 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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| 222 | <B>Field Detail</B></FONT></TH> |
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| 223 | </TR> |
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| 224 | </TABLE> |
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| 225 | |
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| 226 | <A NAME="NULL"><!-- --></A><H3> |
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| 227 | NULL</H3> |
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| 228 | <PRE> |
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| 229 | static final <A HREF="../../../../org/apache/hadoop/mapred/Reporter.html" title="interface in org.apache.hadoop.mapred">Reporter</A> <B>NULL</B></PRE> |
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| 230 | <DL> |
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| 231 | <DD>A constant of Reporter type that does nothing. |
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| 232 | <P> |
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| 233 | <DL> |
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| 234 | </DL> |
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| 235 | </DL> |
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| 236 | |
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| 237 | <!-- ============ METHOD DETAIL ========== --> |
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| 238 | |
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| 239 | <A NAME="method_detail"><!-- --></A> |
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| 240 | <TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> |
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| 241 | <TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> |
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| 242 | <TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> |
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| 243 | <B>Method Detail</B></FONT></TH> |
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| 244 | </TR> |
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| 245 | </TABLE> |
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| 246 | |
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| 247 | <A NAME="setStatus(java.lang.String)"><!-- --></A><H3> |
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| 248 | setStatus</H3> |
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| 249 | <PRE> |
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| 250 | void <B>setStatus</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> status)</PRE> |
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| 251 | <DL> |
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| 252 | <DD>Set the status description for the task. |
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| 253 | <P> |
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| 254 | <DD><DL> |
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| 255 | </DL> |
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| 256 | </DD> |
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| 257 | <DD><DL> |
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| 258 | <DT><B>Parameters:</B><DD><CODE>status</CODE> - brief description of the current status.</DL> |
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| 259 | </DD> |
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| 260 | </DL> |
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| 261 | <HR> |
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| 262 | |
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| 263 | <A NAME="getCounter(java.lang.Enum)"><!-- --></A><H3> |
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| 264 | getCounter</H3> |
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| 265 | <PRE> |
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| 266 | <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred">Counters.Counter</A> <B>getCounter</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</A><?> name)</PRE> |
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| 267 | <DL> |
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| 268 | <DD>Get the <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred"><CODE>Counters.Counter</CODE></A> of the given group with the given name. |
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| 269 | <P> |
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| 270 | <DD><DL> |
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| 271 | </DL> |
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| 272 | </DD> |
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| 273 | <DD><DL> |
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| 274 | <DT><B>Parameters:</B><DD><CODE>name</CODE> - counter name |
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| 275 | <DT><B>Returns:</B><DD>the <code>Counter</code> of the given group/name.</DL> |
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| 276 | </DD> |
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| 277 | </DL> |
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| 278 | <HR> |
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| 279 | |
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| 280 | <A NAME="getCounter(java.lang.String, java.lang.String)"><!-- --></A><H3> |
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| 281 | getCounter</H3> |
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| 282 | <PRE> |
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| 283 | <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred">Counters.Counter</A> <B>getCounter</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> group, |
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| 284 | <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> name)</PRE> |
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| 285 | <DL> |
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| 286 | <DD>Get the <A HREF="../../../../org/apache/hadoop/mapred/Counters.Counter.html" title="class in org.apache.hadoop.mapred"><CODE>Counters.Counter</CODE></A> of the given group with the given name. |
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| 287 | <P> |
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| 288 | <DD><DL> |
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| 289 | </DL> |
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| 290 | </DD> |
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| 291 | <DD><DL> |
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| 292 | <DT><B>Parameters:</B><DD><CODE>group</CODE> - counter group<DD><CODE>name</CODE> - counter name |
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| 293 | <DT><B>Returns:</B><DD>the <code>Counter</code> of the given group/name.</DL> |
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| 294 | </DD> |
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| 295 | </DL> |
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| 296 | <HR> |
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| 297 | |
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| 298 | <A NAME="incrCounter(java.lang.Enum, long)"><!-- --></A><H3> |
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| 299 | incrCounter</H3> |
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| 300 | <PRE> |
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| 301 | void <B>incrCounter</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</A><?> key, |
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| 302 | long amount)</PRE> |
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| 303 | <DL> |
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| 304 | <DD>Increments the counter identified by the key, which can be of |
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| 305 | any <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang"><CODE>Enum</CODE></A> type, by the specified amount. |
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| 306 | <P> |
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| 307 | <DD><DL> |
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| 308 | </DL> |
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| 309 | </DD> |
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| 310 | <DD><DL> |
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| 311 | <DT><B>Parameters:</B><DD><CODE>key</CODE> - key to identify the counter to be incremented. The key can be |
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| 312 | be any <code>Enum</code>.<DD><CODE>amount</CODE> - A non-negative amount by which the counter is to |
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| 313 | be incremented.</DL> |
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| 314 | </DD> |
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| 315 | </DL> |
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| 316 | <HR> |
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| 317 | |
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| 318 | <A NAME="incrCounter(java.lang.String, java.lang.String, long)"><!-- --></A><H3> |
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| 319 | incrCounter</H3> |
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| 320 | <PRE> |
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| 321 | void <B>incrCounter</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> group, |
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| 322 | <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> counter, |
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| 323 | long amount)</PRE> |
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| 324 | <DL> |
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| 325 | <DD>Increments the counter identified by the group and counter name |
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| 326 | by the specified amount. |
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| 327 | <P> |
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| 328 | <DD><DL> |
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| 329 | </DL> |
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| 330 | </DD> |
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| 331 | <DD><DL> |
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| 332 | <DT><B>Parameters:</B><DD><CODE>group</CODE> - name to identify the group of the counter to be incremented.<DD><CODE>counter</CODE> - name to identify the counter within the group.<DD><CODE>amount</CODE> - A non-negative amount by which the counter is to |
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| 333 | be incremented.</DL> |
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| 334 | </DD> |
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| 335 | </DL> |
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| 336 | <HR> |
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| 337 | |
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| 338 | <A NAME="getInputSplit()"><!-- --></A><H3> |
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| 339 | getInputSplit</H3> |
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| 340 | <PRE> |
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| 341 | <A HREF="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred">InputSplit</A> <B>getInputSplit</B>() |
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| 342 | throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</A></PRE> |
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| 343 | <DL> |
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| 344 | <DD>Get the <A HREF="../../../../org/apache/hadoop/mapred/InputSplit.html" title="interface in org.apache.hadoop.mapred"><CODE>InputSplit</CODE></A> object for a map. |
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| 345 | <P> |
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| 347 | </DL> |
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| 348 | </DD> |
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| 349 | <DD><DL> |
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| 350 | |
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| 351 | <DT><B>Returns:</B><DD>the <code>InputSplit</code> that the map is reading from. |
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| 352 | <DT><B>Throws:</B> |
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| 353 | <DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</A></CODE> - if called outside a mapper</DL> |
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