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

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7DiskChecker (Hadoop 0.20.1 API)
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91org.apache.hadoop.util</FONT>
92<BR>
93Class DiskChecker</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.util.DiskChecker</B>
97</PRE>
98<HR>
99<DL>
100<DT><PRE>public class <B>DiskChecker</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>
104Class that provides utility functions for checking disk problem
105<P>
106
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108<HR>
109
110<P>
111<!-- ======== NESTED CLASS SUMMARY ======== -->
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121<CODE>static&nbsp;class</CODE></FONT></TD>
122<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DiskChecker.DiskErrorException.html" title="class in org.apache.hadoop.util">DiskChecker.DiskErrorException</A></B></CODE>
123
124<BR>
125&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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129<CODE>static&nbsp;class</CODE></FONT></TD>
130<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DiskChecker.DiskOutOfSpaceException.html" title="class in org.apache.hadoop.util">DiskChecker.DiskOutOfSpaceException</A></B></CODE>
131
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143<B>Constructor Summary</B></FONT></TH>
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146<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DiskChecker.html#DiskChecker()">DiskChecker</A></B>()</CODE>
147
148<BR>
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163<CODE>static&nbsp;void</CODE></FONT></TD>
164<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DiskChecker.html#checkDir(java.io.File)">checkDir</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A>&nbsp;dir)</CODE>
165
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171<CODE>static&nbsp;boolean</CODE></FONT></TD>
172<TD><CODE><B><A HREF="../../../../org/apache/hadoop/util/DiskChecker.html#mkdirsWithExistsCheck(java.io.File)">mkdirsWithExistsCheck</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A>&nbsp;dir)</CODE>
173
174<BR>
175&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The semantics of mkdirsWithExistsCheck method is different from the mkdirs
176 method provided in the Sun's java.io.File class in the following way:
177 While creating the non-existent parent directories, this method checks for
178 the existence of those directories if the mkdir fails at any point (since
179 that directory might have just been created by some other process).</TD>
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189</TR>
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199<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
200<B>Constructor Detail</B></FONT></TH>
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202</TABLE>
203
204<A NAME="DiskChecker()"><!-- --></A><H3>
205DiskChecker</H3>
206<PRE>
207public <B>DiskChecker</B>()</PRE>
208<DL>
209</DL>
210
211<!-- ============ METHOD DETAIL ========== -->
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217<B>Method Detail</B></FONT></TH>
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219</TABLE>
220
221<A NAME="mkdirsWithExistsCheck(java.io.File)"><!-- --></A><H3>
222mkdirsWithExistsCheck</H3>
223<PRE>
224public static boolean <B>mkdirsWithExistsCheck</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A>&nbsp;dir)</PRE>
225<DL>
226<DD>The semantics of mkdirsWithExistsCheck method is different from the mkdirs
227 method provided in the Sun's java.io.File class in the following way:
228 While creating the non-existent parent directories, this method checks for
229 the existence of those directories if the mkdir fails at any point (since
230 that directory might have just been created by some other process).
231 If both mkdir() and the exists() check fails for any seemingly
232 non-existent directory, then we signal an error; Sun's mkdir would signal
233 an error (return false) if a directory it is attempting to create already
234 exists or the mkdir fails.
235<P>
236<DD><DL>
237<DT><B>Parameters:</B><DD><CODE>dir</CODE> -
238<DT><B>Returns:</B><DD>true on success, false on failure</DL>
239</DD>
240</DL>
241<HR>
242
243<A NAME="checkDir(java.io.File)"><!-- --></A><H3>
244checkDir</H3>
245<PRE>
246public static void <B>checkDir</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/io/File.html?is-external=true" title="class or interface in java.io">File</A>&nbsp;dir)
247                     throws <A HREF="../../../../org/apache/hadoop/util/DiskChecker.DiskErrorException.html" title="class in org.apache.hadoop.util">DiskChecker.DiskErrorException</A></PRE>
248<DL>
249<DD><DL>
250
251<DT><B>Throws:</B>
252<DD><CODE><A HREF="../../../../org/apache/hadoop/util/DiskChecker.DiskErrorException.html" title="class in org.apache.hadoop.util">DiskChecker.DiskErrorException</A></CODE></DL>
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