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CacheFile
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SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
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<H2>
<FONT SIZE="-1">
com.sleepycat.db</FONT>
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Class CacheFile</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.sleepycat.db.CacheFile</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>CacheFile</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
This class allows applications to modify settings for
a <A HREF="../../../com/sleepycat/db/Database.html" title="class in com.sleepycat.db"><CODE>Database</CODE></A> using the <A HREF="../../../com/sleepycat/db/Database.html#getCacheFile()"><CODE>Database.getCacheFile</CODE></A>.
<P>
<P>
<HR>
<P>
<!-- ========== METHOD SUMMARY =========== -->
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CacheFile.html#getMaximumSize()">getMaximumSize</A></B>()</CODE>
<BR>
Return the maximum size for the file backing the database, or 0 if
no maximum file size has been configured.</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/CacheFile.html#getNoFile()">getNoFile</A></B>()</CODE>
<BR>
Return true if the opening of backing temporary files for in-memory
databases has been disallowed.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../com/sleepycat/db/CacheFilePriority.html" title="class in com.sleepycat.db">CacheFilePriority</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/CacheFile.html#getPriority()">getPriority</A></B>()</CODE>
<BR>
Return the cache priority for pages from the specified file.</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/CacheFile.html#getUnlink()">getUnlink</A></B>()</CODE>
<BR>
Return true if the file will be removed when the last reference to it is
closed.</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/CacheFile.html#setMaximumSize(long)">setMaximumSize</A></B>(long bytes)</CODE>
<BR>
Set the
maximum size for the file backing the database.</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/CacheFile.html#setNoFile(boolean)">setNoFile</A></B>(boolean onoff)</CODE>
<BR>
Disallow opening backing temporary files for in-memory
databases, even if they expand to fill the entire cache.</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/CacheFile.html#setPriority(com.sleepycat.db.CacheFilePriority)">setPriority</A></B>(<A HREF="../../../com/sleepycat/db/CacheFilePriority.html" title="class in com.sleepycat.db">CacheFilePriority</A> priority)</CODE>
<BR>
Set the
cache priority for pages from the specified 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/CacheFile.html#setUnlink(boolean)">setUnlink</A></B>(boolean onoff)</CODE>
<BR>
Remove the file when the last reference to it is closed.</TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="getPriority()"><!-- --></A><H3>
getPriority</H3>
<PRE>
public <A HREF="../../../com/sleepycat/db/CacheFilePriority.html" title="class in com.sleepycat.db">CacheFilePriority</A> <B>getPriority</B>()
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Return the cache priority for pages from the specified file.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The cache priority for pages from the specified file.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
<HR>
<A NAME="setPriority(com.sleepycat.db.CacheFilePriority)"><!-- --></A><H3>
setPriority</H3>
<PRE>
public void <B>setPriority</B>(<A HREF="../../../com/sleepycat/db/CacheFilePriority.html" title="class in com.sleepycat.db">CacheFilePriority</A> priority)
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Set the
cache priority for pages from the specified file.
<p>The priority of a page biases the replacement algorithm to be more
or less likely to discard a page when space is needed in the buffer
pool. The bias is temporary, and pages will eventually be discarded
if they are not referenced again. Setting the priority is only
advisory, and does not guarantee pages will be treated in a specific
way.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>priority</CODE> - The cache priority for pages from the specified file.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
<HR>
<A NAME="getMaximumSize()"><!-- --></A><H3>
getMaximumSize</H3>
<PRE>
public long <B>getMaximumSize</B>()
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Return the maximum size for the file backing the database, or 0 if
no maximum file size has been configured.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The maximum size for the file backing the database, or 0 if
no maximum file size has been configured.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
<HR>
<A NAME="setMaximumSize(long)"><!-- --></A><H3>
setMaximumSize</H3>
<PRE>
public void <B>setMaximumSize</B>(long bytes)
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Set the
maximum size for the file backing the database.
<p>Attempts to allocate new pages in the file after the limit has been
reached will fail.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bytes</CODE> - The maximum size for the file backing the database.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
<HR>
<A NAME="getNoFile()"><!-- --></A><H3>
getNoFile</H3>
<PRE>
public boolean <B>getNoFile</B>()
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Return true if the opening of backing temporary files for in-memory
databases has been disallowed.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>True if the opening of backing temporary files for in-memory
databases has been disallowed.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
<HR>
<A NAME="setNoFile(boolean)"><!-- --></A><H3>
setNoFile</H3>
<PRE>
public void <B>setNoFile</B>(boolean onoff)
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Disallow opening backing temporary files for in-memory
databases, even if they expand to fill the entire cache.
<p>Attempts to create new file pages after the cache has been filled
will fail.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>onoff</CODE> - If true,
disallow opening backing temporary files for in-memory
databases, even if they expand to fill the entire cache.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
<HR>
<A NAME="getUnlink()"><!-- --></A><H3>
getUnlink</H3>
<PRE>
public boolean <B>getUnlink</B>()
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Return true if the file will be removed when the last reference to it is
closed.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>True if the file will be removed when the last reference to it is
closed.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
<HR>
<A NAME="setUnlink(boolean)"><!-- --></A><H3>
setUnlink</H3>
<PRE>
public void <B>setUnlink</B>(boolean onoff)
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Remove the file when the last reference to it is closed.
<p>
This method may be called at any time during the life of the application.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>onoff</CODE> - If true,
remove the file when the last reference to it is closed.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
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