source: proiecte/HadoopJUnit/hadoop-0.20.1/docs/api/org/apache/hadoop/mapreduce/RecordWriter.html @ 120

Last change on this file since 120 was 120, checked in by (none), 14 years ago

Added the mail files for the Hadoop JUNit Project
  • Property svn:executable set to *
File size: 15.5 KB
Line 
1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
2<!--NewPage-->
3<HTML>
4<HEAD>
5<!-- Generated by javadoc (build 1.6.0_07) on Tue Sep 01 20:56:58 UTC 2009 -->
6<TITLE>
7RecordWriter (Hadoop 0.20.1 API)
8</TITLE>
9
10<META NAME="date" CONTENT="2009-09-01">
11
12<LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style">
13
14<SCRIPT type="text/javascript">
15function windowTitle()
16{
17    if (location.href.indexOf('is-external=true') == -1) {
18        parent.document.title="RecordWriter (Hadoop 0.20.1 API)";
19    }
20}
21</SCRIPT>
22<NOSCRIPT>
23</NOSCRIPT>
24
25</HEAD>
26
27<BODY BGCOLOR="white" onload="windowTitle();">
28<HR>
29
30
31<!-- ========= START OF TOP NAVBAR ======= -->
32<A NAME="navbar_top"><!-- --></A>
33<A HREF="#skip-navbar_top" title="Skip navigation links"></A>
34<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY="">
35<TR>
36<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
37<A NAME="navbar_top_firstrow"><!-- --></A>
38<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY="">
39  <TR ALIGN="center" VALIGN="top">
40  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A>&nbsp;</TD>
41  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A>&nbsp;</TD>
42  <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> &nbsp;<FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT>&nbsp;</TD>
43  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="class-use/RecordWriter.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A>&nbsp;</TD>
44  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A>&nbsp;</TD>
45  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A>&nbsp;</TD>
46  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A>&nbsp;</TD>
47  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A>&nbsp;</TD>
48  </TR>
49</TABLE>
50</TD>
51<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
52</EM>
53</TD>
54</TR>
55
56<TR>
57<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
58&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce"><B>PREV CLASS</B></A>&nbsp;
59&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="class in org.apache.hadoop.mapreduce"><B>NEXT CLASS</B></A></FONT></TD>
60<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
61  <A HREF="../../../../index.html?org/apache/hadoop/mapreduce/RecordWriter.html" target="_top"><B>FRAMES</B></A>  &nbsp;
62&nbsp;<A HREF="RecordWriter.html" target="_top"><B>NO FRAMES</B></A>  &nbsp;
63&nbsp;<SCRIPT type="text/javascript">
64  <!--
65  if(window==top) {
66    document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>');
67  }
68  //-->
69</SCRIPT>
70<NOSCRIPT>
71  <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>
72</NOSCRIPT>
73
74
75</FONT></TD>
76</TR>
77<TR>
78<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
79  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
80<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
81DETAIL:&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_detail">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_detail">METHOD</A></FONT></TD>
82</TR>
83</TABLE>
84<A NAME="skip-navbar_top"></A>
85<!-- ========= END OF TOP NAVBAR ========= -->
86
87<HR>
88<!-- ======== START OF CLASS DATA ======== -->
89<H2>
90<FONT SIZE="-1">
91org.apache.hadoop.mapreduce</FONT>
92<BR>
93Class RecordWriter&lt;K,V&gt;</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.mapreduce.RecordWriter&lt;K,V&gt;</B>
97</PRE>
98<DL>
99<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../org/apache/hadoop/mapreduce/lib/output/TextOutputFormat.LineRecordWriter.html" title="class in org.apache.hadoop.mapreduce.lib.output">TextOutputFormat.LineRecordWriter</A></DD>
100</DL>
101<HR>
102<DL>
103<DT><PRE>public abstract class <B>RecordWriter&lt;K,V&gt;</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>
104</PRE>
105
106<P>
107<code>RecordWriter</code> writes the output &lt;key, value&gt; pairs
108 to an output file.
109
110 <p><code>RecordWriter</code> implementations write the job outputs to the
111 <A HREF="../../../../org/apache/hadoop/fs/FileSystem.html" title="class in org.apache.hadoop.fs"><CODE>FileSystem</CODE></A>.
112<P>
113
114<P>
115<DL>
116<DT><B>See Also:</B><DD><A HREF="../../../../org/apache/hadoop/mapreduce/OutputFormat.html" title="class in org.apache.hadoop.mapreduce"><CODE>OutputFormat</CODE></A></DL>
117<HR>
118
119<P>
120
121<!-- ======== CONSTRUCTOR SUMMARY ======== -->
122
123<A NAME="constructor_summary"><!-- --></A>
124<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
125<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
126<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
127<B>Constructor Summary</B></FONT></TH>
128</TR>
129<TR BGCOLOR="white" CLASS="TableRowColor">
130<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html#RecordWriter()">RecordWriter</A></B>()</CODE>
131
132<BR>
133&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
134</TR>
135</TABLE>
136&nbsp;
137<!-- ========== METHOD SUMMARY =========== -->
138
139<A NAME="method_summary"><!-- --></A>
140<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
141<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
142<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
143<B>Method Summary</B></FONT></TH>
144</TR>
145<TR BGCOLOR="white" CLASS="TableRowColor">
146<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
147<CODE>abstract &nbsp;void</CODE></FONT></TD>
148<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html#close(org.apache.hadoop.mapreduce.TaskAttemptContext)">close</A></B>(<A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptContext</A>&nbsp;context)</CODE>
149
150<BR>
151&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Close this <code>RecordWriter</code> to future operations.</TD>
152</TR>
153<TR BGCOLOR="white" CLASS="TableRowColor">
154<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
155<CODE>abstract &nbsp;void</CODE></FONT></TD>
156<TD><CODE><B><A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html#write(K, V)">write</A></B>(<A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="type parameter in RecordWriter">K</A>&nbsp;key,
157      <A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="type parameter in RecordWriter">V</A>&nbsp;value)</CODE>
158
159<BR>
160&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writes a key/value pair.</TD>
161</TR>
162</TABLE>
163&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
164<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
165<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
166<TH ALIGN="left"><B>Methods inherited from class java.lang.<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></B></TH>
167</TR>
168<TR BGCOLOR="white" CLASS="TableRowColor">
169<TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
170</TR>
171</TABLE>
172&nbsp;
173<P>
174
175<!-- ========= CONSTRUCTOR DETAIL ======== -->
176
177<A NAME="constructor_detail"><!-- --></A>
178<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
179<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
180<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
181<B>Constructor Detail</B></FONT></TH>
182</TR>
183</TABLE>
184
185<A NAME="RecordWriter()"><!-- --></A><H3>
186RecordWriter</H3>
187<PRE>
188public <B>RecordWriter</B>()</PRE>
189<DL>
190</DL>
191
192<!-- ============ METHOD DETAIL ========== -->
193
194<A NAME="method_detail"><!-- --></A>
195<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
196<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
197<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
198<B>Method Detail</B></FONT></TH>
199</TR>
200</TABLE>
201
202<A NAME="write(java.lang.Object,java.lang.Object)"><!-- --></A><A NAME="write(K, V)"><!-- --></A><H3>
203write</H3>
204<PRE>
205public abstract void <B>write</B>(<A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="type parameter in RecordWriter">K</A>&nbsp;key,
206                           <A HREF="../../../../org/apache/hadoop/mapreduce/RecordWriter.html" title="type parameter in RecordWriter">V</A>&nbsp;value)
207                    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>,
208                           <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></PRE>
209<DL>
210<DD>Writes a key/value pair.
211<P>
212<DD><DL>
213<DT><B>Parameters:</B><DD><CODE>key</CODE> - the key to write.<DD><CODE>value</CODE> - the value to write.
214<DT><B>Throws:</B>
215<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>
216<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></CODE></DL>
217</DD>
218</DL>
219<HR>
220
221<A NAME="close(org.apache.hadoop.mapreduce.TaskAttemptContext)"><!-- --></A><H3>
222close</H3>
223<PRE>
224public abstract void <B>close</B>(<A HREF="../../../../org/apache/hadoop/mapreduce/TaskAttemptContext.html" title="class in org.apache.hadoop.mapreduce">TaskAttemptContext</A>&nbsp;context)
225                    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>,
226                           <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></PRE>
227<DL>
228<DD>Close this <code>RecordWriter</code> to future operations.
229<P>
230<DD><DL>
231<DT><B>Parameters:</B><DD><CODE>context</CODE> - the context of the task
232<DT><B>Throws:</B>
233<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>
234<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/InterruptedException.html?is-external=true" title="class or interface in java.lang">InterruptedException</A></CODE></DL>
235</DD>
236</DL>
237<!-- ========= END OF CLASS DATA ========= -->
238<HR>
239
240
241<!-- ======= START OF BOTTOM NAVBAR ====== -->
242<A NAME="navbar_bottom"><!-- --></A>
243<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A>
244<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY="">
245<TR>
246<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
247<A NAME="navbar_bottom_firstrow"><!-- --></A>
248<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY="">
249  <TR ALIGN="center" VALIGN="top">
250  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A>&nbsp;</TD>
251  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A>&nbsp;</TD>
252  <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> &nbsp;<FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT>&nbsp;</TD>
253  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="class-use/RecordWriter.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A>&nbsp;</TD>
254  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A>&nbsp;</TD>
255  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A>&nbsp;</TD>
256  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A>&nbsp;</TD>
257  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A>&nbsp;</TD>
258  </TR>
259</TABLE>
260</TD>
261<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
262</EM>
263</TD>
264</TR>
265
266<TR>
267<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
268&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/RecordReader.html" title="class in org.apache.hadoop.mapreduce"><B>PREV CLASS</B></A>&nbsp;
269&nbsp;<A HREF="../../../../org/apache/hadoop/mapreduce/ReduceContext.html" title="class in org.apache.hadoop.mapreduce"><B>NEXT CLASS</B></A></FONT></TD>
270<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
271  <A HREF="../../../../index.html?org/apache/hadoop/mapreduce/RecordWriter.html" target="_top"><B>FRAMES</B></A>  &nbsp;
272&nbsp;<A HREF="RecordWriter.html" target="_top"><B>NO FRAMES</B></A>  &nbsp;
273&nbsp;<SCRIPT type="text/javascript">
274  <!--
275  if(window==top) {
276    document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>');
277  }
278  //-->
279</SCRIPT>
280<NOSCRIPT>
281  <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>
282</NOSCRIPT>
283
284
285</FONT></TD>
286</TR>
287<TR>
288<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
289  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
290<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
291DETAIL:&nbsp;FIELD&nbsp;|&nbsp;<A HREF="#constructor_detail">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_detail">METHOD</A></FONT></TD>
292</TR>
293</TABLE>
294<A NAME="skip-navbar_bottom"></A>
295<!-- ======== END OF BOTTOM NAVBAR ======= -->
296
297<HR>
298Copyright &copy; 2009 The Apache Software Foundation
299</BODY>
300</HTML>
Note: See TracBrowser for help on using the repository browser.