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CompactConfig (Oracle - Berkeley DB Java API)
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com.sleepycat.db</FONT>
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Class CompactConfig</H2>
<PRE>
<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.sleepycat.db.CompactConfig</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</A></DD>
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<DT><PRE>public class <B>CompactConfig</B><DT>extends <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</A></DL>
</PRE>
<P>
Configuration for <A HREF="../../../com/sleepycat/db/Database.html#compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)"><CODE>Database.compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)</CODE></A> operations.
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<CODE>static <A HREF="../../../com/sleepycat/db/CompactConfig.html" title="class in com.sleepycat.db">CompactConfig</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#DEFAULT">DEFAULT</A></B></CODE>
<BR>
Default configuration used if null is passed to methods that create a
cursor.</TD>
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<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#CompactConfig()">CompactConfig</A></B>()</CODE>
<BR>
Construct a default configuration object for compact operations.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getFillPercent()">getFillPercent</A></B>()</CODE>
<BR>
Return the the desired fill percentage.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getFreeListOnly()">getFreeListOnly</A></B>()</CODE>
<BR>
Return true if the whether to skip page compaction.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getFreeSpace()">getFreeSpace</A></B>()</CODE>
<BR>
Return true if the whether to return pages to the filesystem.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getMaxPages()">getMaxPages</A></B>()</CODE>
<BR>
Return the the maximum number of pages to free.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#getTimeout()">getTimeout</A></B>()</CODE>
<BR>
Return the the lock timeout set for implicit transactions, in microseconds.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setFillPercent(int)">setFillPercent</A></B>(int fillpercent)</CODE>
<BR>
Set the desired fill percentage.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setFreeListOnly(boolean)">setFreeListOnly</A></B>(boolean freeListOnly)</CODE>
<BR>
Configure whether to skip page compaction, only returning pages
to the filesystem that are already free and at the end of the file.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setFreeSpace(boolean)">setFreeSpace</A></B>(boolean freeSpace)</CODE>
<BR>
Return pages to the filesystem if possible.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setMaxPages(int)">setMaxPages</A></B>(int maxPages)</CODE>
<BR>
Set the maximum number of pages to free.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CompactConfig.html#setTimeout(int)">setTimeout</A></B>(int timeout)</CODE>
<BR>
Set the lock timeout for implicit transactions.</TD>
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<A NAME="DEFAULT"><!-- --></A><H3>
DEFAULT</H3>
<PRE>
public static final <A HREF="../../../com/sleepycat/db/CompactConfig.html" title="class in com.sleepycat.db">CompactConfig</A> <B>DEFAULT</B></PRE>
<DL>
<DD>Default configuration used if null is passed to methods that create a
cursor.
<P>
<DL>
</DL>
</DL>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="CompactConfig()"><!-- --></A><H3>
CompactConfig</H3>
<PRE>
public <B>CompactConfig</B>()</PRE>
<DL>
<DD>Construct a default configuration object for compact operations.
<P>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
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</TABLE>
<A NAME="setFillPercent(int)"><!-- --></A><H3>
setFillPercent</H3>
<PRE>
public void <B>setFillPercent</B>(int fillpercent)</PRE>
<DL>
<DD>Set the desired fill percentage.
If non-zero, the goal for filling pages, specified as a percentage
between 1 and 100. Any page in a Btree or Recno databases not at or
above this percentage full will be considered for compaction. The
default behavior is to consider every page for compaction, regardless
of its page fill percentage.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>fillpercent</CODE> - The desired fill percentage.</DL>
</DD>
</DL>
<HR>
<A NAME="getFillPercent()"><!-- --></A><H3>
getFillPercent</H3>
<PRE>
public int <B>getFillPercent</B>()</PRE>
<DL>
<DD>Return the the desired fill percentage.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The the desired fill percentage.</DL>
</DD>
</DL>
<HR>
<A NAME="setFreeListOnly(boolean)"><!-- --></A><H3>
setFreeListOnly</H3>
<PRE>
public void <B>setFreeListOnly</B>(boolean freeListOnly)</PRE>
<DL>
<DD>Configure whether to skip page compaction, only returning pages
to the filesystem that are already free and at the end of the file.
This flag must be set if the database is a Hash access method database.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>freeListOnly</CODE> - Whether to skip page compaction</DL>
</DD>
</DL>
<HR>
<A NAME="getFreeListOnly()"><!-- --></A><H3>
getFreeListOnly</H3>
<PRE>
public boolean <B>getFreeListOnly</B>()</PRE>
<DL>
<DD>Return true if the whether to skip page compaction.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>True if the whether to skip page compaction.</DL>
</DD>
</DL>
<HR>
<A NAME="setFreeSpace(boolean)"><!-- --></A><H3>
setFreeSpace</H3>
<PRE>
public void <B>setFreeSpace</B>(boolean freeSpace)</PRE>
<DL>
<DD>Return pages to the filesystem if possible. If this flag is not
specified, pages emptied as a result of compaction will be placed on the
free list for re-use, but not returned to the filesystem.
Note that only pages at the end of the file may be returned. Given the one
pass nature of the algorithm if a page near the end of the file is
logically near the begining of the btree it will inhibit returning pages to
the file system.
A second call to the method with a low fillfactor can be used to return
pages in such a situation.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>freeSpace</CODE> - Whether to return pages to the filesystem</DL>
</DD>
</DL>
<HR>
<A NAME="getFreeSpace()"><!-- --></A><H3>
getFreeSpace</H3>
<PRE>
public boolean <B>getFreeSpace</B>()</PRE>
<DL>
<DD>Return true if the whether to return pages to the filesystem.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>True if the whether to return pages to the filesystem.</DL>
</DD>
</DL>
<HR>
<A NAME="setMaxPages(int)"><!-- --></A><H3>
setMaxPages</H3>
<PRE>
public void <B>setMaxPages</B>(int maxPages)</PRE>
<DL>
<DD>Set the maximum number of pages to free.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>maxPages</CODE> - If non-zero, the call will return after that number of pages have been
freed.</DL>
</DD>
</DL>
<HR>
<A NAME="getMaxPages()"><!-- --></A><H3>
getMaxPages</H3>
<PRE>
public int <B>getMaxPages</B>()</PRE>
<DL>
<DD>Return the the maximum number of pages to free.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The the maximum number of pages to free.</DL>
</DD>
</DL>
<HR>
<A NAME="setTimeout(int)"><!-- --></A><H3>
setTimeout</H3>
<PRE>
public void <B>setTimeout</B>(int timeout)</PRE>
<DL>
<DD>Set the lock timeout for implicit transactions.
If non-zero, and no transaction parameter was specified to
<A HREF="../../../com/sleepycat/db/Database.html#compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)"><CODE>Database.compact(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.CompactConfig)</CODE></A>, the lock timeout set for implicit
transactions, in microseconds.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>timeout</CODE> - the lock timeout set for implicit transactions, in microseconds.</DL>
</DD>
</DL>
<HR>
<A NAME="getTimeout()"><!-- --></A><H3>
getTimeout</H3>
<PRE>
public int <B>getTimeout</B>()</PRE>
<DL>
<DD>Return the the lock timeout set for implicit transactions, in microseconds.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>The the lock timeout set for implicit transactions, in microseconds.</DL>
</DD>
</DL>
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