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LRUCache (Rice Pastry - API Specifications)
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<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
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Rice Pastry API</EM>
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<A HREF="../../rice/persistence/LockManagerImpl.html" title="class in rice.persistence"><B>PREV CLASS</B></A>
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<A HREF="../../rice/persistence/MemoryStorage.html" title="class in rice.persistence"><B>NEXT CLASS</B></A></FONT></TD>
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<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
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SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD>
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<!-- ======== START OF CLASS DATA ======== -->
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<H2>
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<FONT SIZE="-1">
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rice.persistence</FONT>
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<BR>
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Class LRUCache</H2>
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<PRE>
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java.lang.Object
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<IMG SRC="../../resources/inherit.gif" ALT="extended by "><B>rice.persistence.LRUCache</B>
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</PRE>
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<DL>
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<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A>, <A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></DD>
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</DL>
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<HR>
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<DL>
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<DT><PRE>public class <B>LRUCache</B><DT>extends java.lang.Object<DT>implements <A HREF="../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A></DL>
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</PRE>
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<P>
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This class is an encapsulation of a least-recently-used (LRU)
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cache. It uses the provided storage service in order to
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store the cached data. If the Storage provides non-corruption
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services, these services will also be provided by this cache.
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<P>
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<P>
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<HR>
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<P>
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<!-- =========== FIELD SUMMARY =========== -->
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<A NAME="field_summary"><!-- --></A>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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<B>Field Summary</B></FONT></TH>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>protected <A HREF="../../rice/environment/Environment.html" title="class in rice.environment">Environment</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#environment">environment</A></B></CODE>
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<BR>
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</TD>
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</TR>
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</TABLE>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<A NAME="constructor_summary"><!-- --></A>
|
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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<B>Constructor Summary</B></FONT></TH>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#LRUCache(rice.persistence.Storage, int, rice.environment.Environment)">LRUCache</A></B>(<A HREF="../../rice/persistence/Storage.html" title="interface in rice.persistence">Storage</A> storage,
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int maximumSize,
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<A HREF="../../rice/environment/Environment.html" title="class in rice.environment">Environment</A> env)</CODE>
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<BR>
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Builds a LRU cache given a storage object to store the cached
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data in and a maximum cache size.</TD>
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</TR>
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</TABLE>
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<!-- ========== METHOD SUMMARY =========== -->
|
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|
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<A NAME="method_summary"><!-- --></A>
|
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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<B>Method Summary</B></FONT></TH>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
|
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#cache(rice.p2p.commonapi.Id, java.io.Serializable, java.io.Serializable, rice.Continuation)">cache</A></B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
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java.io.Serializable metadata,
|
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java.io.Serializable obj,
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<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</CODE>
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||
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<BR>
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Caches an object in this storage.</TD>
|
||
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> boolean</CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#exists(rice.p2p.commonapi.Id)">exists</A></B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id)</CODE>
|
||
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|
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<BR>
|
||
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Returns whether or not an object is cached in the location <code>id</code>.</TD>
|
||
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</TR>
|
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
|
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#flush(rice.Continuation)">flush</A></B>(<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</CODE>
|
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||
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<BR>
|
||
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Method which is used to erase all data stored in the Cache.</TD>
|
||
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</TR>
|
||
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
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<CODE> long</CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#getMaximumSize()">getMaximumSize</A></B>()</CODE>
|
||
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|
||
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<BR>
|
||
|
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Returns the maximum size of the cache, in bytes.</TD>
|
||
|
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</TR>
|
||
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
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<CODE> java.io.Serializable</CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#getMetadata(rice.p2p.commonapi.Id)">getMetadata</A></B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id)</CODE>
|
||
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||
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<BR>
|
||
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Returns the metadata associated with the provided object, or null if
|
||
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no metadata exists.</TD>
|
||
|
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</TR>
|
||
|
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
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<CODE> void</CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#getObject(rice.p2p.commonapi.Id, rice.Continuation)">getObject</A></B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
|
||
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<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</CODE>
|
||
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|
||
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<BR>
|
||
|
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Returns the object identified by the given id.</TD>
|
||
|
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</TR>
|
||
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
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<CODE> int</CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#getSize()">getSize</A></B>()</CODE>
|
||
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<BR>
|
||
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Returns the number of Ids currently stored in the catalog</TD>
|
||
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</TR>
|
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
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<CODE> <A HREF="../../rice/persistence/Storage.html" title="interface in rice.persistence">Storage</A></CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#getStorage()">getStorage</A></B>()</CODE>
|
||
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|
||
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<BR>
|
||
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Returns the backing storage object</TD>
|
||
|
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</TR>
|
||
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
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<CODE> long</CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#getTotalSize()">getTotalSize</A></B>()</CODE>
|
||
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|
||
|
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<BR>
|
||
|
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Returns the total size of the stored data in bytes.</TD>
|
||
|
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</TR>
|
||
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
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<CODE> void</CODE></FONT></TD>
|
||
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#rename(rice.p2p.commonapi.Id, rice.p2p.commonapi.Id, rice.Continuation)">rename</A></B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> oldId,
|
||
|
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<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> newId,
|
||
|
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<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</CODE>
|
||
|
|
|
||
|
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<BR>
|
||
|
|
Renames the given object to the new id.</TD>
|
||
|
|
</TR>
|
||
|
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
|
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
|
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<CODE> <A HREF="../../rice/p2p/commonapi/IdSet.html" title="interface in rice.p2p.commonapi">IdSet</A></CODE></FONT></TD>
|
||
|
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#scan()">scan</A></B>()</CODE>
|
||
|
|
|
||
|
|
<BR>
|
||
|
|
Return all objects currently stored by this catalog
|
||
|
|
|
||
|
|
NOTE: This method blocks so if the behavior of this method changes and
|
||
|
|
no longer stored in memory, this method may be deprecated.</TD>
|
||
|
|
</TR>
|
||
|
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
|
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
|
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<CODE> <A HREF="../../rice/p2p/commonapi/IdSet.html" title="interface in rice.p2p.commonapi">IdSet</A></CODE></FONT></TD>
|
||
|
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<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#scan(rice.p2p.commonapi.IdRange)">scan</A></B>(<A HREF="../../rice/p2p/commonapi/IdRange.html" title="interface in rice.p2p.commonapi">IdRange</A> range)</CODE>
|
||
|
|
|
||
|
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<BR>
|
||
|
|
Return the objects identified by the given range of ids.</TD>
|
||
|
|
</TR>
|
||
|
|
<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
|
|
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
|
|
<CODE> java.util.SortedMap</CODE></FONT></TD>
|
||
|
|
<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#scanMetadata()">scanMetadata</A></B>()</CODE>
|
||
|
|
|
||
|
|
<BR>
|
||
|
|
Returns a map which contains keys mapping ids to the associated
|
||
|
|
metadata.</TD>
|
||
|
|
</TR>
|
||
|
|
<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
|
|
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
|
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<CODE> java.util.SortedMap</CODE></FONT></TD>
|
||
|
|
<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#scanMetadata(rice.p2p.commonapi.IdRange)">scanMetadata</A></B>(<A HREF="../../rice/p2p/commonapi/IdRange.html" title="interface in rice.p2p.commonapi">IdRange</A> range)</CODE>
|
||
|
|
|
||
|
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<BR>
|
||
|
|
Returns a map which contains keys mapping ids to the associated
|
||
|
|
metadata.</TD>
|
||
|
|
</TR>
|
||
|
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<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
|
|
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
|
|
<CODE> java.util.SortedMap</CODE></FONT></TD>
|
||
|
|
<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#scanMetadataValuesHead(java.lang.Object)">scanMetadataValuesHead</A></B>(java.lang.Object value)</CODE>
|
||
|
|
|
||
|
|
<BR>
|
||
|
|
Returns the submapping of ids which have metadata less than the provided
|
||
|
|
value.</TD>
|
||
|
|
</TR>
|
||
|
|
<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
|
|
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
|
||
|
|
<CODE> java.util.SortedMap</CODE></FONT></TD>
|
||
|
|
<TD><CODE><B><A HREF="../../rice/persistence/LRUCache.html#scanMetadataValuesNull()">scanMetadataValuesNull</A></B>()</CODE>
|
||
|
|
|
||
|
|
<BR>
|
||
|
|
Returns the submapping of ids which have metadata null</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="../../rice/persistence/LRUCache.html#setMaximumSize(int, rice.Continuation)">setMaximumSize</A></B>(int size,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</CODE>
|
||
|
|
|
||
|
|
<BR>
|
||
|
|
Sets the maximum size of the cache, in bytes.</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="../../rice/persistence/LRUCache.html#setMetadata(rice.p2p.commonapi.Id, java.io.Serializable, rice.Continuation)">setMetadata</A></B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
|
||
|
|
java.io.Serializable metadata,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> command)</CODE>
|
||
|
|
|
||
|
|
<BR>
|
||
|
|
Updates the metadata stored under the given key to be the provided
|
||
|
|
value.</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="../../rice/persistence/LRUCache.html#uncache(rice.p2p.commonapi.Id, rice.Continuation)">uncache</A></B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</CODE>
|
||
|
|
|
||
|
|
<BR>
|
||
|
|
Removes the object from the list of cached objects.</TD>
|
||
|
|
</TR>
|
||
|
|
</TABLE>
|
||
|
|
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
|
||
|
|
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
|
||
|
|
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
|
||
|
|
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
|
||
|
|
</TR>
|
||
|
|
<TR BGCOLOR="white" CLASS="TableRowColor">
|
||
|
|
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
|
||
|
|
</TR>
|
||
|
|
</TABLE>
|
||
|
|
|
||
|
|
<P>
|
||
|
|
|
||
|
|
<!-- ============ FIELD DETAIL =========== -->
|
||
|
|
|
||
|
|
<A NAME="field_detail"><!-- --></A>
|
||
|
|
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
|
||
|
|
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
|
||
|
|
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
|
||
|
|
<B>Field Detail</B></FONT></TH>
|
||
|
|
</TR>
|
||
|
|
</TABLE>
|
||
|
|
|
||
|
|
<A NAME="environment"><!-- --></A><H3>
|
||
|
|
environment</H3>
|
||
|
|
<PRE>
|
||
|
|
protected <A HREF="../../rice/environment/Environment.html" title="class in rice.environment">Environment</A> <B>environment</B></PRE>
|
||
|
|
<DL>
|
||
|
|
<DL>
|
||
|
|
</DL>
|
||
|
|
</DL>
|
||
|
|
|
||
|
|
<!-- ========= CONSTRUCTOR DETAIL ======== -->
|
||
|
|
|
||
|
|
<A NAME="constructor_detail"><!-- --></A>
|
||
|
|
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
|
||
|
|
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
|
||
|
|
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
|
||
|
|
<B>Constructor Detail</B></FONT></TH>
|
||
|
|
</TR>
|
||
|
|
</TABLE>
|
||
|
|
|
||
|
|
<A NAME="LRUCache(rice.persistence.Storage, int, rice.environment.Environment)"><!-- --></A><H3>
|
||
|
|
LRUCache</H3>
|
||
|
|
<PRE>
|
||
|
|
public <B>LRUCache</B>(<A HREF="../../rice/persistence/Storage.html" title="interface in rice.persistence">Storage</A> storage,
|
||
|
|
int maximumSize,
|
||
|
|
<A HREF="../../rice/environment/Environment.html" title="class in rice.environment">Environment</A> env)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Builds a LRU cache given a storage object to store the cached
|
||
|
|
data in and a maximum cache size.
|
||
|
|
<P>
|
||
|
|
<DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>storage</CODE> - The storage service to use as a back-end storage<DD><CODE>maximumSize</CODE> - The maximum size, in bytes, of storage to use</DL>
|
||
|
|
</DL>
|
||
|
|
|
||
|
|
<!-- ============ METHOD DETAIL ========== -->
|
||
|
|
|
||
|
|
<A NAME="method_detail"><!-- --></A>
|
||
|
|
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
|
||
|
|
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
|
||
|
|
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
|
||
|
|
<B>Method Detail</B></FONT></TH>
|
||
|
|
</TR>
|
||
|
|
</TABLE>
|
||
|
|
|
||
|
|
<A NAME="getStorage()"><!-- --></A><H3>
|
||
|
|
getStorage</H3>
|
||
|
|
<PRE>
|
||
|
|
public <A HREF="../../rice/persistence/Storage.html" title="interface in rice.persistence">Storage</A> <B>getStorage</B>()</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the backing storage object
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
</DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
|
||
|
|
<DT><B>Returns:</B><DD>The storage backing this cache</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="rename(rice.p2p.commonapi.Id, rice.p2p.commonapi.Id, rice.Continuation)"><!-- --></A><H3>
|
||
|
|
rename</H3>
|
||
|
|
<PRE>
|
||
|
|
public void <B>rename</B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> oldId,
|
||
|
|
<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> newId,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Renames the given object to the new id. This method is potentially faster
|
||
|
|
than store/cache and unstore/uncache.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#rename(rice.p2p.commonapi.Id, rice.p2p.commonapi.Id, rice.Continuation)">rename</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>oldId</CODE> - The id of the object in question.<DD><CODE>newId</CODE> - The new id of the object in question.<DD><CODE>c</CODE> - The command to run once the operation is complete</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="cache(rice.p2p.commonapi.Id, java.io.Serializable, java.io.Serializable, rice.Continuation)"><!-- --></A><H3>
|
||
|
|
cache</H3>
|
||
|
|
<PRE>
|
||
|
|
public void <B>cache</B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
|
||
|
|
java.io.Serializable metadata,
|
||
|
|
java.io.Serializable obj,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Caches an object in this storage. This method is non-blocking.
|
||
|
|
If the object has already been stored at the location id, this
|
||
|
|
method has the effect of calling <code>uncachr(id)</code> followed
|
||
|
|
by <code>cache(id, obj)</code>. This method finishes by calling
|
||
|
|
receiveResult() on the provided continuation with whether or not
|
||
|
|
the object was cached. Note that the object may not actually be
|
||
|
|
cached due to the cache replacement policy.
|
||
|
|
|
||
|
|
Returns <code>True</code> if the cache actaully stores the object, else
|
||
|
|
<code>False</code> (through receiveResult on c).
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Cache.html#cache(rice.p2p.commonapi.Id, java.io.Serializable, java.io.Serializable, rice.Continuation)">cache</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>id</CODE> - The object's id.<DD><CODE>metadata</CODE> - The object's metadata<DD><CODE>obj</CODE> - The object to cache.<DD><CODE>c</CODE> - The command to run once the operation is complete</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="uncache(rice.p2p.commonapi.Id, rice.Continuation)"><!-- --></A><H3>
|
||
|
|
uncache</H3>
|
||
|
|
<PRE>
|
||
|
|
public void <B>uncache</B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Removes the object from the list of cached objects. This method is
|
||
|
|
non-blocking. If the object was not in the cached list in the first place,
|
||
|
|
nothing happens and <code>False</code> is returned.
|
||
|
|
|
||
|
|
Returns <code>True</code> if the action succeeds, else
|
||
|
|
<code>False</code> (through receiveResult on c).
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Cache.html#uncache(rice.p2p.commonapi.Id, rice.Continuation)">uncache</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>pid</CODE> - The object's id<DD><CODE>c</CODE> - The command to run once the operation is complete</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="exists(rice.p2p.commonapi.Id)"><!-- --></A><H3>
|
||
|
|
exists</H3>
|
||
|
|
<PRE>
|
||
|
|
public boolean <B>exists</B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns whether or not an object is cached in the location <code>id</code>.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#exists(rice.p2p.commonapi.Id)">exists</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>id</CODE> - The id of the object in question.
|
||
|
|
<DT><B>Returns:</B><DD>Whether or not an object is present at id.</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="getObject(rice.p2p.commonapi.Id, rice.Continuation)"><!-- --></A><H3>
|
||
|
|
getObject</H3>
|
||
|
|
<PRE>
|
||
|
|
public void <B>getObject</B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the object identified by the given id.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#getObject(rice.p2p.commonapi.Id, rice.Continuation)">getObject</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>id</CODE> - The id of the object in question.<DD><CODE>c</CODE> - The command to run once the operation is complete</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="getMetadata(rice.p2p.commonapi.Id)"><!-- --></A><H3>
|
||
|
|
getMetadata</H3>
|
||
|
|
<PRE>
|
||
|
|
public java.io.Serializable <B>getMetadata</B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the metadata associated with the provided object, or null if
|
||
|
|
no metadata exists. The metadata must be stored in memory, so this
|
||
|
|
operation is guaranteed to be fast and non-blocking.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#getMetadata(rice.p2p.commonapi.Id)">getMetadata</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>id</CODE> - The id for which the metadata is needed
|
||
|
|
<DT><B>Returns:</B><DD>The metadata, or null of non exists</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="setMetadata(rice.p2p.commonapi.Id, java.io.Serializable, rice.Continuation)"><!-- --></A><H3>
|
||
|
|
setMetadata</H3>
|
||
|
|
<PRE>
|
||
|
|
public void <B>setMetadata</B>(<A HREF="../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
|
||
|
|
java.io.Serializable metadata,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> command)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Updates the metadata stored under the given key to be the provided
|
||
|
|
value. As this may require a disk access, the requestor must
|
||
|
|
also provide a continuation to return the result to.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#setMetadata(rice.p2p.commonapi.Id, java.io.Serializable, rice.Continuation)">setMetadata</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>id</CODE> - The id for the metadata<DD><CODE>metadata</CODE> - The metadata to store<DD><CODE>c</CODE> - The command to run once the operation is complete</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="scan(rice.p2p.commonapi.IdRange)"><!-- --></A><H3>
|
||
|
|
scan</H3>
|
||
|
|
<PRE>
|
||
|
|
public <A HREF="../../rice/p2p/commonapi/IdSet.html" title="interface in rice.p2p.commonapi">IdSet</A> <B>scan</B>(<A HREF="../../rice/p2p/commonapi/IdRange.html" title="interface in rice.p2p.commonapi">IdRange</A> range)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Return the objects identified by the given range of ids. The IdSet
|
||
|
|
returned contains the Ids of the stored objects. The range is
|
||
|
|
partially inclusive, the lower range is inclusive, and the upper
|
||
|
|
exclusive.
|
||
|
|
|
||
|
|
|
||
|
|
NOTE: This method blocks so if the behavior of this method changes and
|
||
|
|
uses the disk, this method may be deprecated.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#scan(rice.p2p.commonapi.IdRange)">scan</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>range</CODE> - The range to query
|
||
|
|
<DT><B>Returns:</B><DD>The idset containg the keys</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="scan()"><!-- --></A><H3>
|
||
|
|
scan</H3>
|
||
|
|
<PRE>
|
||
|
|
public <A HREF="../../rice/p2p/commonapi/IdSet.html" title="interface in rice.p2p.commonapi">IdSet</A> <B>scan</B>()</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Return all objects currently stored by this catalog
|
||
|
|
|
||
|
|
NOTE: This method blocks so if the behavior of this method changes and
|
||
|
|
no longer stored in memory, this method may be deprecated.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#scan()">scan</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
|
||
|
|
<DT><B>Returns:</B><DD>The idset containg the keys</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="scanMetadata(rice.p2p.commonapi.IdRange)"><!-- --></A><H3>
|
||
|
|
scanMetadata</H3>
|
||
|
|
<PRE>
|
||
|
|
public java.util.SortedMap <B>scanMetadata</B>(<A HREF="../../rice/p2p/commonapi/IdRange.html" title="interface in rice.p2p.commonapi">IdRange</A> range)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns a map which contains keys mapping ids to the associated
|
||
|
|
metadata.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#scanMetadata(rice.p2p.commonapi.IdRange)">scanMetadata</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>range</CODE> - The range to query
|
||
|
|
<DT><B>Returns:</B><DD>The map containg the keys</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="scanMetadata()"><!-- --></A><H3>
|
||
|
|
scanMetadata</H3>
|
||
|
|
<PRE>
|
||
|
|
public java.util.SortedMap <B>scanMetadata</B>()</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns a map which contains keys mapping ids to the associated
|
||
|
|
metadata.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#scanMetadata()">scanMetadata</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
|
||
|
|
<DT><B>Returns:</B><DD>The treemap mapping ids to metadata</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="scanMetadataValuesHead(java.lang.Object)"><!-- --></A><H3>
|
||
|
|
scanMetadataValuesHead</H3>
|
||
|
|
<PRE>
|
||
|
|
public java.util.SortedMap <B>scanMetadataValuesHead</B>(java.lang.Object value)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the submapping of ids which have metadata less than the provided
|
||
|
|
value.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#scanMetadataValuesHead(java.lang.Object)">scanMetadataValuesHead</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>value</CODE> - The maximal metadata value
|
||
|
|
<DT><B>Returns:</B><DD>The submapping</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="scanMetadataValuesNull()"><!-- --></A><H3>
|
||
|
|
scanMetadataValuesNull</H3>
|
||
|
|
<PRE>
|
||
|
|
public java.util.SortedMap <B>scanMetadataValuesNull</B>()</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the submapping of ids which have metadata null
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#scanMetadataValuesNull()">scanMetadataValuesNull</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
|
||
|
|
<DT><B>Returns:</B><DD>The submapping</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="getMaximumSize()"><!-- --></A><H3>
|
||
|
|
getMaximumSize</H3>
|
||
|
|
<PRE>
|
||
|
|
public long <B>getMaximumSize</B>()</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the maximum size of the cache, in bytes. The result
|
||
|
|
is returned via the receiveResult method on the provided
|
||
|
|
Continuation with an Integer representing the size.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Cache.html#getMaximumSize()">getMaximumSize</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>c</CODE> - The command to run once the operation is complete</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="getSize()"><!-- --></A><H3>
|
||
|
|
getSize</H3>
|
||
|
|
<PRE>
|
||
|
|
public int <B>getSize</B>()</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the number of Ids currently stored in the catalog
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#getSize()">getSize</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
|
||
|
|
<DT><B>Returns:</B><DD>The number of ids in the catalog</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="getTotalSize()"><!-- --></A><H3>
|
||
|
|
getTotalSize</H3>
|
||
|
|
<PRE>
|
||
|
|
public long <B>getTotalSize</B>()</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Returns the total size of the stored data in bytes. The result
|
||
|
|
is returned via the receiveResult method on the provided
|
||
|
|
Continuation with an Integer representing the size.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#getTotalSize()">getTotalSize</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>c</CODE> - The command to run once the operation is complete
|
||
|
|
<DT><B>Returns:</B><DD>The total size, in bytes, of data stored.</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="setMaximumSize(int, rice.Continuation)"><!-- --></A><H3>
|
||
|
|
setMaximumSize</H3>
|
||
|
|
<PRE>
|
||
|
|
public void <B>setMaximumSize</B>(int size,
|
||
|
|
<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Sets the maximum size of the cache, in bytes. Setting this
|
||
|
|
value to a smaller value than the current value may result in
|
||
|
|
object being evicted from the cache.
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Cache.html#setMaximumSize(int, rice.Continuation)">setMaximumSize</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>size</CODE> - The new maximum size, in bytes, of the cache.<DD><CODE>c</CODE> - The command to run once the operation is complete</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<HR>
|
||
|
|
|
||
|
|
<A NAME="flush(rice.Continuation)"><!-- --></A><H3>
|
||
|
|
flush</H3>
|
||
|
|
<PRE>
|
||
|
|
public void <B>flush</B>(<A HREF="../../rice/Continuation.html" title="interface in rice">Continuation</A> c)</PRE>
|
||
|
|
<DL>
|
||
|
|
<DD>Method which is used to erase all data stored in the Cache.
|
||
|
|
Use this method with care!
|
||
|
|
<P>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Specified by:</B><DD><CODE><A HREF="../../rice/persistence/Catalog.html#flush(rice.Continuation)">flush</A></CODE> in interface <CODE><A HREF="../../rice/persistence/Catalog.html" title="interface in rice.persistence">Catalog</A></CODE></DL>
|
||
|
|
</DD>
|
||
|
|
<DD><DL>
|
||
|
|
<DT><B>Parameters:</B><DD><CODE>c</CODE> - The command to run once done</DL>
|
||
|
|
</DD>
|
||
|
|
</DL>
|
||
|
|
<!-- ========= END OF CLASS DATA ========= -->
|
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<HR>
|
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<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
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