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7LogParser (Hadoop 0.20.1 API)
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91org.apache.hadoop.contrib.failmon</FONT>
92<BR>
93Class LogParser</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.contrib.failmon.LogParser</B>
97</PRE>
98<DL>
99<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html" title="interface in org.apache.hadoop.contrib.failmon">Monitored</A></DD>
100</DL>
101<DL>
102<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../org/apache/hadoop/contrib/failmon/HadoopLogParser.html" title="class in org.apache.hadoop.contrib.failmon">HadoopLogParser</A>, <A HREF="../../../../../org/apache/hadoop/contrib/failmon/SystemLogParser.html" title="class in org.apache.hadoop.contrib.failmon">SystemLogParser</A></DD>
103</DL>
104<HR>
105<DL>
106<DT><PRE>public abstract class <B>LogParser</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><DT>implements <A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html" title="interface in org.apache.hadoop.contrib.failmon">Monitored</A></DL>
107</PRE>
108
109<P>
110This class represents objects that provide log parsing
111 functionality. Typically, such objects read log files line
112 by line and for each log entry they identify, they create a
113 corresponding EventRecord. In this way, disparate log files
114 can be merged using the uniform format of EventRecords and can,
115 thus, be processed in a uniform way.
116<P>
117
118<P>
119<HR>
120
121<P>
122
123<!-- ======== CONSTRUCTOR SUMMARY ======== -->
124
125<A NAME="constructor_summary"><!-- --></A>
126<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
127<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
128<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
129<B>Constructor Summary</B></FONT></TH>
130</TR>
131<TR BGCOLOR="white" CLASS="TableRowColor">
132<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#LogParser(java.lang.String)">LogParser</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;fname)</CODE>
133
134<BR>
135&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Create a parser that will read from the specified log file.</TD>
136</TR>
137</TABLE>
138&nbsp;
139<!-- ========== METHOD SUMMARY =========== -->
140
141<A NAME="method_summary"><!-- --></A>
142<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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145<B>Method Summary</B></FONT></TH>
146</TR>
147<TR BGCOLOR="white" CLASS="TableRowColor">
148<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
149<CODE>&nbsp;void</CODE></FONT></TD>
150<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#checkForRotation()">checkForRotation</A></B>()</CODE>
151
152<BR>
153&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Check whether the log file has been rotated.</TD>
154</TR>
155<TR BGCOLOR="white" CLASS="TableRowColor">
156<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
157<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/contrib/failmon/EventRecord.html" title="class in org.apache.hadoop.contrib.failmon">EventRecord</A></CODE></FONT></TD>
158<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#getNext()">getNext</A></B>()</CODE>
159
160<BR>
161&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Continue parsing the log file until a valid log entry is identified.</TD>
162</TR>
163<TR BGCOLOR="white" CLASS="TableRowColor">
164<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
165<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/io/BufferedReader.html?is-external=true" title="class or interface in java.io">BufferedReader</A></CODE></FONT></TD>
166<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#getReader()">getReader</A></B>()</CODE>
167
168<BR>
169&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return the BufferedReader, that reads the log file</TD>
170</TR>
171<TR BGCOLOR="white" CLASS="TableRowColor">
172<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
173<CODE>&nbsp;<A HREF="../../../../../org/apache/hadoop/contrib/failmon/EventRecord.html" title="class in org.apache.hadoop.contrib.failmon">EventRecord</A>[]</CODE></FONT></TD>
174<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#monitor()">monitor</A></B>()</CODE>
175
176<BR>
177&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Get an array of all EventRecords that can be extracted for
178 the represented hardware component.</TD>
179</TR>
180<TR BGCOLOR="white" CLASS="TableRowColor">
181<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
182<CODE>&nbsp;void</CODE></FONT></TD>
183<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#monitor(org.apache.hadoop.contrib.failmon.LocalStore)">monitor</A></B>(<A HREF="../../../../../org/apache/hadoop/contrib/failmon/LocalStore.html" title="class in org.apache.hadoop.contrib.failmon">LocalStore</A>&nbsp;ls)</CODE>
184
185<BR>
186&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Insert all EventRecords that can be extracted for
187 the represented hardware component into a LocalStore.</TD>
188</TR>
189<TR BGCOLOR="white" CLASS="TableRowColor">
190<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
191<CODE>protected abstract &nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/Calendar.html?is-external=true" title="class or interface in java.util">Calendar</A></CODE></FONT></TD>
192<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#parseDate(java.lang.String, java.lang.String)">parseDate</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;strDate,
193          <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;strTime)</CODE>
194
195<BR>
196&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parse a date found in Hadoop log file.</TD>
197</TR>
198<TR BGCOLOR="white" CLASS="TableRowColor">
199<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
200<CODE>abstract &nbsp;<A HREF="../../../../../org/apache/hadoop/contrib/failmon/EventRecord.html" title="class in org.apache.hadoop.contrib.failmon">EventRecord</A></CODE></FONT></TD>
201<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#parseLine(java.lang.String)">parseLine</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;line)</CODE>
202
203<BR>
204&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Parses one line of the log.</TD>
205</TR>
206<TR BGCOLOR="white" CLASS="TableRowColor">
207<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
208<CODE>protected &nbsp;void</CODE></FONT></TD>
209<TD><CODE><B><A HREF="../../../../../org/apache/hadoop/contrib/failmon/LogParser.html#setNetworkProperties()">setNetworkProperties</A></B>()</CODE>
210
211<BR>
212&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
213</TR>
214</TABLE>
215&nbsp;<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
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222</TR>
223</TABLE>
224&nbsp;<A NAME="methods_inherited_from_class_org.apache.hadoop.contrib.failmon.Monitored"><!-- --></A>
225<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
226<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
227<TH ALIGN="left"><B>Methods inherited from interface org.apache.hadoop.contrib.failmon.<A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html" title="interface in org.apache.hadoop.contrib.failmon">Monitored</A></B></TH>
228</TR>
229<TR BGCOLOR="white" CLASS="TableRowColor">
230<TD><CODE><A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html#getInfo()">getInfo</A></CODE></TD>
231</TR>
232</TABLE>
233&nbsp;
234<P>
235
236<!-- ========= CONSTRUCTOR DETAIL ======== -->
237
238<A NAME="constructor_detail"><!-- --></A>
239<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
240<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
241<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
242<B>Constructor Detail</B></FONT></TH>
243</TR>
244</TABLE>
245
246<A NAME="LogParser(java.lang.String)"><!-- --></A><H3>
247LogParser</H3>
248<PRE>
249public <B>LogParser</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;fname)</PRE>
250<DL>
251<DD>Create a parser that will read from the specified log file.
252<P>
253<DL>
254<DT><B>Parameters:</B><DD><CODE>fname</CODE> - the filename of the log file to be read</DL>
255</DL>
256
257<!-- ============ METHOD DETAIL ========== -->
258
259<A NAME="method_detail"><!-- --></A>
260<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
261<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
262<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
263<B>Method Detail</B></FONT></TH>
264</TR>
265</TABLE>
266
267<A NAME="setNetworkProperties()"><!-- --></A><H3>
268setNetworkProperties</H3>
269<PRE>
270protected void <B>setNetworkProperties</B>()</PRE>
271<DL>
272<DD><DL>
273</DL>
274</DD>
275<DD><DL>
276</DL>
277</DD>
278</DL>
279<HR>
280
281<A NAME="monitor(org.apache.hadoop.contrib.failmon.LocalStore)"><!-- --></A><H3>
282monitor</H3>
283<PRE>
284public void <B>monitor</B>(<A HREF="../../../../../org/apache/hadoop/contrib/failmon/LocalStore.html" title="class in org.apache.hadoop.contrib.failmon">LocalStore</A>&nbsp;ls)</PRE>
285<DL>
286<DD>Insert all EventRecords that can be extracted for
287 the represented hardware component into a LocalStore.
288<P>
289<DD><DL>
290<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html#monitor(org.apache.hadoop.contrib.failmon.LocalStore)">monitor</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html" title="interface in org.apache.hadoop.contrib.failmon">Monitored</A></CODE></DL>
291</DD>
292<DD><DL>
293<DT><B>Parameters:</B><DD><CODE>ls</CODE> - the LocalStore into which the EventRecords
294 are to be stored.</DL>
295</DD>
296</DL>
297<HR>
298
299<A NAME="monitor()"><!-- --></A><H3>
300monitor</H3>
301<PRE>
302public <A HREF="../../../../../org/apache/hadoop/contrib/failmon/EventRecord.html" title="class in org.apache.hadoop.contrib.failmon">EventRecord</A>[] <B>monitor</B>()</PRE>
303<DL>
304<DD>Get an array of all EventRecords that can be extracted for
305 the represented hardware component.
306<P>
307<DD><DL>
308<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html#monitor()">monitor</A></CODE> in interface <CODE><A HREF="../../../../../org/apache/hadoop/contrib/failmon/Monitored.html" title="interface in org.apache.hadoop.contrib.failmon">Monitored</A></CODE></DL>
309</DD>
310<DD><DL>
311
312<DT><B>Returns:</B><DD>The array of EventRecords</DL>
313</DD>
314</DL>
315<HR>
316
317<A NAME="getNext()"><!-- --></A><H3>
318getNext</H3>
319<PRE>
320public <A HREF="../../../../../org/apache/hadoop/contrib/failmon/EventRecord.html" title="class in org.apache.hadoop.contrib.failmon">EventRecord</A> <B>getNext</B>()</PRE>
321<DL>
322<DD>Continue parsing the log file until a valid log entry is identified.
323 When one such entry is found, parse it and return a corresponding EventRecord.
324<P>
325<DD><DL>
326</DL>
327</DD>
328<DD><DL>
329
330<DT><B>Returns:</B><DD>The EventRecord corresponding to the next log entry</DL>
331</DD>
332</DL>
333<HR>
334
335<A NAME="getReader()"><!-- --></A><H3>
336getReader</H3>
337<PRE>
338public <A HREF="http://java.sun.com/javase/6/docs/api/java/io/BufferedReader.html?is-external=true" title="class or interface in java.io">BufferedReader</A> <B>getReader</B>()</PRE>
339<DL>
340<DD>Return the BufferedReader, that reads the log file
341<P>
342<DD><DL>
343</DL>
344</DD>
345<DD><DL>
346
347<DT><B>Returns:</B><DD>The BufferedReader that reads the log file</DL>
348</DD>
349</DL>
350<HR>
351
352<A NAME="checkForRotation()"><!-- --></A><H3>
353checkForRotation</H3>
354<PRE>
355public void <B>checkForRotation</B>()</PRE>
356<DL>
357<DD>Check whether the log file has been rotated. If so,
358 start reading the file from the beginning.
359<P>
360<DD><DL>
361</DL>
362</DD>
363<DD><DL>
364</DL>
365</DD>
366</DL>
367<HR>
368
369<A NAME="parseLine(java.lang.String)"><!-- --></A><H3>
370parseLine</H3>
371<PRE>
372public abstract <A HREF="../../../../../org/apache/hadoop/contrib/failmon/EventRecord.html" title="class in org.apache.hadoop.contrib.failmon">EventRecord</A> <B>parseLine</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;line)
373                               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>
374<DL>
375<DD>Parses one line of the log. If the line contains a valid
376 log entry, then an appropriate EventRecord is returned, after all
377 relevant fields have been parsed.
378<P>
379<DD><DL>
380</DL>
381</DD>
382<DD><DL>
383<DT><B>Parameters:</B><DD><CODE>line</CODE> - the log line to be parsed
384<DT><B>Returns:</B><DD>the EventRecord representing the log entry of the line. If
385  the line does not contain a valid log entry, then the EventRecord
386  returned has isValid() = false. When the end-of-file has been reached,
387  null is returned to the caller.
388<DT><B>Throws:</B>
389<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>
390</DD>
391</DL>
392<HR>
393
394<A NAME="parseDate(java.lang.String, java.lang.String)"><!-- --></A><H3>
395parseDate</H3>
396<PRE>
397protected abstract <A HREF="http://java.sun.com/javase/6/docs/api/java/util/Calendar.html?is-external=true" title="class or interface in java.util">Calendar</A> <B>parseDate</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;strDate,
398                                      <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;strTime)</PRE>
399<DL>
400<DD>Parse a date found in Hadoop log file.
401<P>
402<DD><DL>
403</DL>
404</DD>
405<DD><DL>
406
407<DT><B>Returns:</B><DD>a Calendar representing the date</DL>
408</DD>
409</DL>
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