lock.html
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of time given.</TD>
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<CODE>abstract void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.html#release()">release</A></B>()</CODE>
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Releases exclusive access.</TD>
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<A NAME="LOCK_POLL_INTERVAL"><!-- --></A><H3>
LOCK_POLL_INTERVAL</H3>
<PRE>
public static long <B>LOCK_POLL_INTERVAL</B></PRE>
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<DL>
</DL>
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<A NAME="failureReason"><!-- --></A><H3>
failureReason</H3>
<PRE>
protected <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Throwable.html" title="class or interface in java.lang">Throwable</A> <B>failureReason</B></PRE>
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<DD>If a lock obtain called, this failureReason may be set with the "root cause" Exception as to why the lock was not obtained.
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<A NAME="Lock()"><!-- --></A><H3>
Lock</H3>
<PRE>
public <B>Lock</B>()</PRE>
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<A NAME="obtain()"><!-- --></A><H3>
obtain</H3>
<PRE>
public abstract boolean <B>obtain</B>() throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Attempts to obtain exclusive access and immediately return upon success or failure.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true iff exclusive access is obtained<DT><B>Throws:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
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<A NAME="obtain(long)"><!-- --></A><H3>
obtain</H3>
<PRE>
public boolean <B>obtain</B>(long lockWaitTimeout) throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Attempts to obtain an exclusive lock within amount of time given. Currently polls once per second until lockWaitTimeout is passed.
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<DD><DL>
<DT><B>Parameters:</B><DD><CODE>lockWaitTimeout</CODE> - length of time to wait in ms<DT><B>Returns:</B><DD>true if lock was obtained<DT><B>Throws:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - if lock wait times out or obtain() throws an IOException</DL>
</DD>
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<A NAME="release()"><!-- --></A><H3>
release</H3>
<PRE>
public abstract void <B>release</B>()</PRE>
<DL>
<DD>Releases exclusive access.
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<DD><DL>
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<A NAME="isLocked()"><!-- --></A><H3>
isLocked</H3>
<PRE>
public abstract boolean <B>isLocked</B>()</PRE>
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<DD>Returns true if the resource is currently locked. Note that one must still call <A HREF="../../../../org/apache/lucene/store/Lock.html#obtain()"><CODE>obtain()</CODE></A> before using the resource.
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