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Lock (Lucene 2.1.0 API)
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org.apache.lucene.store</FONT>
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Class Lock</H2>
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<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A>
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<DT>public abstract class <B>Lock</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL>
<P>
An interprocess mutex lock. <p>Typical use might look like:<pre> new Lock.With(directory.makeLock("my.lock")) { public Object doBody() { <i>... code to execute while locked ...</i> } }.run(); </pre>
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<DT><B>Version:</B></DT> <DD>$Id: Lock.java 472959 2006-11-09 16:21:50Z yonik $</DD><DT><B>Author:</B></DT> <DD>Doug Cutting</DD><DT><B>See Also:</B><DD><A HREF="../../../../org/apache/lucene/store/Directory.html#makeLock(java.lang.String)"><CODE>Directory.makeLock(String)</CODE></A></DL>
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<CODE>static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.With.html" title="class in org.apache.lucene.store">Lock.With</A></B></CODE>
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Utility class for executing code with exclusive access.</TD>
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<CODE>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></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.html#failureReason">failureReason</A></B></CODE>
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If a lock obtain called, this failureReason may be set with the "root cause" Exception as to why the lock was not obtained.</TD>
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<CODE>static long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.html#LOCK_POLL_INTERVAL">LOCK_POLL_INTERVAL</A></B></CODE>
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<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.html#Lock()">Lock</A></B>()</CODE>
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<CODE>abstract boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.html#isLocked()">isLocked</A></B>()</CODE>
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Returns true if the resource is currently locked.</TD>
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<CODE>abstract boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.html#obtain()">obtain</A></B>()</CODE>
<BR>
Attempts to obtain exclusive access and immediately return upon success or failure.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/lucene/store/Lock.html#obtain(long)">obtain</A></B>(long lockWaitTimeout)</CODE>
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Attempts to obtain an exclusive lock within amount?? 快捷鍵說明
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