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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><TITLE>ResourceDispatcher (Project JXTA J2SE)</TITLE><META NAME="keywords" CONTENT="net.jxta.impl.util.ResourceDispatcher class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="ResourceDispatcher (Project JXTA J2SE)";}</SCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A 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CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><a href='http://www.jxta.org' target='_blank'>Project JXTA</a></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../net/jxta/impl/util/ProducerBiasedQueue.html" title="class in net.jxta.impl.util"><B>PREV CLASS</B></A> <A HREF="../../../../net/jxta/impl/util/ResourceDispatcher.ClientAccount.html" title="class in net.jxta.impl.util"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="ResourceDispatcher.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">net.jxta.impl.util</FONT><BR>Class ResourceDispatcher</H2><PRE>java.lang.Object <IMG SRC="../../../../resources/inherit.gif" ALT="extended by"><B>net.jxta.impl.util.ResourceDispatcher</B></PRE><HR><DL><DT>public class <B>ResourceDispatcher</B><DT>extends java.lang.Object</DL><P><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><A NAME="nested_class_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Nested Class Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>(package private) class</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../net/jxta/impl/util/ResourceDispatcher.ClientAccount.html" title="class in net.jxta.impl.util">ResourceDispatcher.ClientAccount</A></B></CODE><BR> </TD></TR></TABLE> <!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../net/jxta/impl/util/ResourceDispatcher.html#ResourceDispatcher(long, long, long, long, long, long, boolean, java.lang.String)">ResourceDispatcher</A></B>(long minAccounts, long minReservedPerAccount, long maxReservedPerAccount, long extraItems, long maxExtraPerAccount, long minExtraPoolSize, boolean roundRobin, java.lang.String dispatcherName)</CODE><BR> Construct a Fair Resource Allocator with the given parameters:</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../net/jxta/impl/util/ResourceDispatcher.html#getNbEligibles()">getNbEligibles</A></B>()</CODE><BR> </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../../../net/jxta/impl/util/ResourceAccount.html" title="interface in net.jxta.impl.util">ResourceAccount</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../net/jxta/impl/util/ResourceDispatcher.html#newAccount(long, long, java.lang.Object)">newAccount</A></B>(long nbReq, long maxExtra, java.lang.Object userObject)</CODE><BR> Creates and returns a new client account.</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"><TD><B>Methods inherited from class java.lang.Object</B></TD></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 =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Constructor Detail</B></FONT></TD></TR></TABLE><A NAME="ResourceDispatcher(long, long, long, long, long, long, boolean, java.lang.String)"><!-- --></A><H3>ResourceDispatcher</H3><PRE>public <B>ResourceDispatcher</B>(long minAccounts, long minReservedPerAccount, long maxReservedPerAccount, long extraItems, long maxExtraPerAccount, long minExtraPoolSize, boolean roundRobin, java.lang.String dispatcherName)</PRE><DL><DD>Construct a Fair Resource Allocator with the given parameters:<P><DT><B>Parameters:</B><DD><CODE>minAccounts</CODE> - The minimum number of client accounts that we want to garantee we can handle. <0 means 0<DD><CODE>minReservedPerAccount</CODE> - The minimum reservation request that we will always grant to accounts as long as we have less than minAccounts <0 means 0.<DD><CODE>maxReservedPerAccount</CODE> - The maximum reservation request that we ever will grant to any given account. <minReservedPerAccount means ==<DD><CODE>extraItems</CODE> - The total number of items that we will authorize beyond what has been reserved. <0 means 0.<DD><CODE>maxExtraPerAccount</CODE> - The maximum number of extra items we will ever let any given account occupy. <0 or >extraItems means ==extraItems.<DD><CODE>minExtraPoolSize</CODE> - The number of extra items that can never be taken out of the extra pool to satisfy a reservation request.<DD><CODE>roundRobin</CODE> - If true, when there is no items available, all eligible accounts are put in a FIFO. Accounts release items often, and the oldest account in the FIFO will get it. If false, accounts always keep items for as long as they can use them, and there is no FIFO of eligible accounts. Accounts can obtain new resources only if available at the time they try to aquire it. RoundRobin is more fair but has more overhead. Neither mode will cause starvation as long as accounts reserve at least one item each. RoundRobin is most usefull when allocating threads.</DL><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="getNbEligibles()"><!-- --></A><H3>getNbEligibles</H3><PRE>public int <B>getNbEligibles</B>()</PRE><DL><DD><DL></DL></DD></DL><HR><A NAME="newAccount(long, long, java.lang.Object)"><!-- --></A><H3>newAccount</H3><PRE>public <A HREF="../../../../net/jxta/impl/util/ResourceAccount.html" title="interface in net.jxta.impl.util">ResourceAccount</A> <B>newAccount</B>(long nbReq, long maxExtra, java.lang.Object userObject)</PRE><DL><DD>Creates and returns a new client account.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>nbReq</CODE> - the number of reserved items requested (may not be always granted in full). A negative value is taken to mean 0.<DD><CODE>maxExtra</CODE> - the number of additional items that this account authorizes to be allocated in addition to the reserved ones. This is typically usefull if the items are threads and if some accounts are not re-entrant. Then nbReq would be 1 and maxExtra would be 0. It is also permitted to have some accounts receive no items at all ever by setting nbReq and maxExtra both to zero. A negative maxExtra is taken as meaning no specified limit, in which case an actual limit may be set silently.<DD><CODE>userObject</CODE> - An opaque cookie that the account object will return when requested. This is usefull to relate an account returned by ClientAccount.releaseItem() to an invoking code relevant object.<DT><B>Returns:</B><DD>ResourceAccount An account with this allocator.</DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ======= START OF BOTTOM NAVBAR ====== --><A NAME="navbar_bottom"><!-- --></A><A HREF="#skip-navbar_bottom" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/ResourceDispatcher.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>JXTA J2SE</EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../net/jxta/impl/util/ProducerBiasedQueue.html" title="class in net.jxta.impl.util"><B>PREV CLASS</B></A> <A HREF="../../../../net/jxta/impl/util/ResourceDispatcher.ClientAccount.html" title="class in net.jxta.impl.util"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="ResourceDispatcher.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: <A HREF="#nested_class_summary">NESTED</A> | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_bottom"></A><!-- ======== END OF BOTTOM NAVBAR ======= --><HR></BODY></HTML>⌨️ 快捷键说明
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