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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><!-- Generated by javadoc (build 1.4.2_06) on Wed Oct 26 05:17:04 CEST 2005 --><TITLE>MessageQueue</TITLE><META NAME="keywords" CONTENT="broker.MessageQueue class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="MessageQueue";}</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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END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">broker</FONT><BR>Class MessageQueue</H2><PRE>java.lang.Object <IMG SRC="../resources/inherit.gif" ALT="extended by"><B>broker.MessageQueue</B></PRE><HR><DL><DT>public class <B>MessageQueue</B><DT>extends java.lang.Object</DL><P>A simple message queue based on a linked list.<P><P><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== 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="../broker/MessageQueue.html#MessageQueue()">MessageQueue</A></B>()</CODE><BR> </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> <A HREF="../com/Message.html" title="class in com">Message</A></CODE></FONT></TD><TD><CODE><B><A HREF="../broker/MessageQueue.html#dequeue()">dequeue</A></B>()</CODE><BR> Dequeues the next message and stores references to its sender and receiver. </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="../broker/MessageQueue.html#enqueue(broker.Destination, broker.Destination, com.Message)">enqueue</A></B>(<A HREF="../broker/Destination.html" title="interface in broker">Destination</A> sender, <A HREF="../broker/Destination.html" title="interface in broker">Destination</A> receiver, <A HREF="../com/Message.html" title="class in com">Message</A> message)</CODE><BR> Enqueues a message with references to its sender and receiver.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../broker/Destination.html" title="interface in broker">Destination</A></CODE></FONT></TD><TD><CODE><B><A HREF="../broker/MessageQueue.html#getReceiver()">getReceiver</A></B>()</CODE><BR> Returns the receiver of the last dequeued message.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../broker/Destination.html" title="interface in broker">Destination</A></CODE></FONT></TD><TD><CODE><B><A HREF="../broker/MessageQueue.html#getSender()">getSender</A></B>()</CODE><BR> Returns the sender of the last dequeued message.</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="../broker/MessageQueue.html#isEmpty()">isEmpty</A></B>()</CODE><BR> Returns true if this queue contains no entries.</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="../broker/MessageQueue.html#size()">size</A></B>()</CODE><BR> Returns the queue's size.</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="MessageQueue()"><!-- --></A><H3>MessageQueue</H3><PRE>public <B>MessageQueue</B>()</PRE><DL></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="enqueue(broker.Destination, broker.Destination, com.Message)"><!-- --></A><H3>enqueue</H3><PRE>public void <B>enqueue</B>(<A HREF="../broker/Destination.html" title="interface in broker">Destination</A> sender, <A HREF="../broker/Destination.html" title="interface in broker">Destination</A> receiver, <A HREF="../com/Message.html" title="class in com">Message</A> message)</PRE><DL><DD>Enqueues a message with references to its sender and receiver.<P><DD><DL><DT><B>Parameters:</B><DD><CODE>sender</CODE> - the sender of the message<DD><CODE>receiver</CODE> - the receiver of the message<DD><CODE>message</CODE> - the message itself</DL></DD></DL><HR><A NAME="size()"><!-- --></A><H3>size</H3><PRE>public int <B>size</B>()</PRE><DL><DD>Returns the queue's size.<P><DD><DL><DT><B>Returns:</B><DD>the queue's size</DL></DD></DL><HR><A NAME="isEmpty()"><!-- --></A><H3>isEmpty</H3><PRE>public boolean <B>isEmpty</B>()</PRE><DL><DD>Returns true if this queue contains no entries.<P><DD><DL><DT><B>Returns:</B><DD>true if this queue contains no entries.</DL></DD></DL><HR><A NAME="dequeue()"><!-- --></A><H3>dequeue</H3><PRE>public <A HREF="../com/Message.html" title="class in com">Message</A> <B>dequeue</B>()</PRE><DL><DD>Dequeues the next message and stores references to its sender and receiver. Use the getSender and getReceiver Method to access them.<P><DD><DL><DT><B>Returns:</B><DD>the next message</DL></DD></DL><HR><A NAME="getReceiver()"><!-- --></A><H3>getReceiver</H3><PRE>public <A HREF="../broker/Destination.html" title="interface in broker">Destination</A> <B>getReceiver</B>()</PRE><DL><DD>Returns the receiver of the last dequeued message.<P><DD><DL><DT><B>Returns:</B><DD>receiver of the last dequeues message.</DL></DD></DL><HR><A NAME="getSender()"><!-- --></A><H3>getSender</H3><PRE>public <A HREF="../broker/Destination.html" title="interface in broker">Destination</A> <B>getSender</B>()</PRE><DL><DD>Returns the sender of the last dequeued message.<P><DD><DL><DT><B>Returns:</B><DD>sender of the last dequeued message.</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="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></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../broker/LocalEnvironment.html" title="class in broker"><B>PREV CLASS</B></A> <A HREF="../broker/RoutingTable.html" title="class in broker"><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="MessageQueue.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: NESTED | 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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