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PastPolicy (Rice Pastry - API Specifications)
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Rice Pastry API</EM>
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<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
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SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
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DETAIL: FIELD | CONSTR | <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.p2p.past</FONT>
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<BR>
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Interface PastPolicy</H2>
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<DL>
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<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../rice/p2p/past/PastPolicy.DefaultPastPolicy.html" title="class in rice.p2p.past">PastPolicy.DefaultPastPolicy</A></DD>
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<DL>
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<DT><PRE>public interface <B>PastPolicy</B></DL>
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</PRE>
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<P>
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<DL>
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<DT><B>Version:</B></DT>
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<DD>$Id: PastPolicy.java 4654 2009-01-08 16:33:07Z jeffh $</DD>
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<DT><B>Author:</B></DT>
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<DD>Alan Mislove</DD>
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</DL>
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<!-- ======== NESTED CLASS 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>Nested Class Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE>static class</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../rice/p2p/past/PastPolicy.DefaultPastPolicy.html" title="class in rice.p2p.past">PastPolicy.DefaultPastPolicy</A></B></CODE>
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<BR>
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The default policy for Past, which fetches any available copy of a replicated object and
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always allows inserts locally.</TD>
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</TR>
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</TABLE>
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<!-- ========== METHOD SUMMARY =========== -->
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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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<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> boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../rice/p2p/past/PastPolicy.html#allowInsert(rice.p2p.past.PastContent)">allowInsert</A></B>(<A HREF="../../../rice/p2p/past/PastContent.html" title="interface in rice.p2p.past">PastContent</A> content)</CODE>
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<BR>
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This method is call before an insert() is processed on the local node.</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/p2p/past/PastPolicy.html#fetch(rice.p2p.commonapi.Id, rice.p2p.commonapi.NodeHandle, rice.persistence.Cache, rice.p2p.past.Past, rice.Continuation)">fetch</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/p2p/commonapi/NodeHandle.html" title="class in rice.p2p.commonapi">NodeHandle</A> hint,
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<A HREF="../../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A> backup,
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<A HREF="../../../rice/p2p/past/Past.html" title="interface in rice.p2p.past">Past</A> past,
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<A HREF="../../../rice/Continuation.html" title="interface in rice">Continuation</A> command)</CODE>
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<BR>
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This method is called when Past is told to fetch a key.</TD>
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</TR>
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</TABLE>
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<P>
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<!-- ============ METHOD DETAIL ========== -->
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<A NAME="method_detail"><!-- --></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="1"><FONT SIZE="+2">
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<B>Method Detail</B></FONT></TH>
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</TR>
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</TABLE>
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<A NAME="fetch(rice.p2p.commonapi.Id, rice.p2p.commonapi.NodeHandle, rice.persistence.Cache, rice.p2p.past.Past, rice.Continuation)"><!-- --></A><H3>
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fetch</H3>
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<PRE>
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void <B>fetch</B>(<A HREF="../../../rice/p2p/commonapi/Id.html" title="interface in rice.p2p.commonapi">Id</A> id,
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<A HREF="../../../rice/p2p/commonapi/NodeHandle.html" title="class in rice.p2p.commonapi">NodeHandle</A> hint,
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<A HREF="../../../rice/persistence/Cache.html" title="interface in rice.persistence">Cache</A> backup,
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<A HREF="../../../rice/p2p/past/Past.html" title="interface in rice.p2p.past">Past</A> past,
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<A HREF="../../../rice/Continuation.html" title="interface in rice">Continuation</A> command)</PRE>
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<DL>
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<DD>This method is called when Past is told to fetch a key. This method allows the application
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to specify how a replica is fetched and authenticated. The client should fetch the object
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(possibly using the past instance provided) and then return the object to the provided
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continuation. The client *MUST* call the continuation at some point in the future, even if
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the request is lost.
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>id</CODE> - The id to fetch<DD><CODE>past</CODE> - The local past instance<DD><CODE>backup</CODE> - The backup cache, where the object *might* be located<DD><CODE>command</CODE> - The command to call with the replica to store</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="allowInsert(rice.p2p.past.PastContent)"><!-- --></A><H3>
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allowInsert</H3>
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<PRE>
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boolean <B>allowInsert</B>(<A HREF="../../../rice/p2p/past/PastContent.html" title="interface in rice.p2p.past">PastContent</A> content)</PRE>
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<DL>
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<DD>This method is call before an insert() is processed on the local node. This allows applications
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to make a decision on whether or not to store the replica. Unless you know what you are doing,
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don't return anything but 'true' here.
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>content</CODE> - The content about to be stored
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<DT><B>Returns:</B><DD>Whether the insert should be allowed</DL>
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</DD>
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</DL>
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<!-- ========= END OF CLASS DATA ========= -->
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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/p2p/past/PastPolicy.DefaultPastPolicy.html" title="class in rice.p2p.past"><B>NEXT CLASS</B></A></FONT></TD>
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SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
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