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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_02) on Thu Nov 13 17:20:52 PST 2003 --><TITLE>NotificationBroadcasterSupport (Java 2 Platform Ent. Ed. v1.4)</TITLE><META NAME="keywords" CONTENT="javax.management.NotificationBroadcasterSupport class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="NotificationBroadcasterSupport (Java 2 Platform Ent. 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Ed. v1.4</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../javax/management/Notification.html" title="class in javax.management"><B>PREV CLASS</B></A> <A HREF="../../javax/management/NotificationFilterSupport.html" title="class in javax.management"><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="NotificationBroadcasterSupport.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_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javax.management</FONT><BR>Class NotificationBroadcasterSupport</H2><PRE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A> <IMG SRC="../../resources/inherit.gif" ALT="extended by"><B>javax.management.NotificationBroadcasterSupport</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../javax/management/NotificationBroadcaster.html" title="interface in javax.management">NotificationBroadcaster</A>, <A HREF="../../javax/management/NotificationEmitter.html" title="interface in javax.management">NotificationEmitter</A></DD></DL><DL><DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../javax/management/monitor/Monitor.html" title="class in javax.management.monitor">Monitor</A>, <A HREF="../../javax/management/relation/RelationService.html" title="class in javax.management.relation">RelationService</A>, <A HREF="../../javax/management/timer/Timer.html" title="class in javax.management.timer">Timer</A></DD></DL><HR><DL><DT>public class <B>NotificationBroadcasterSupport</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A><DT>implements <A HREF="../../javax/management/NotificationEmitter.html" title="interface in javax.management">NotificationEmitter</A></DL><P><p>Provides an implementation of <A HREF="../../javax/management/NotificationEmitter.html" title="interface in javax.management"><CODE>NotificationEmitter</CODE></A> interface. This can be used as the super class of an MBean that sends notifications.</p> <p>It is not specified whether the notification dispatch model is synchronous or asynchronous. That is, when a thread calls <A HREF="../../javax/management/NotificationBroadcasterSupport.html#sendNotification(javax.management.Notification)"><CODE>sendNotification</CODE></A>, the <A HREF="../../javax/management/NotificationListener.html#handleNotification(javax.management.Notification, java.lang.Object)"><CODE>NotificationListener.handleNotification</CODE></A> method of each listener may be called within that thread (a synchronous model) or within some other thread (an asynchronous model).</p> <p>Applications should not depend on notification dispatch being synchronous or being asynchronous. Thus:</p> <ul> <li>Applications should not assume a synchronous model. When the <A HREF="../../javax/management/NotificationBroadcasterSupport.html#sendNotification(javax.management.Notification)"><CODE>sendNotification</CODE></A> method returns, it is not guaranteed that every listener's <A HREF="../../javax/management/NotificationListener.html#handleNotification(javax.management.Notification, java.lang.Object)"><CODE>handleNotification</CODE></A> method has been called. It is not guaranteed either that a listener will see notifications in the same order as they were generated. Listeners that depend on order should use the sequence number of notifications to determine their order (see <A HREF="../../javax/management/Notification.html#getSequenceNumber()"><CODE>Notification.getSequenceNumber()</CODE></A>). <li>Applications should not assume an asynchronous model. If the actions performed by a listener are potentially slow, the listener should arrange for them to be performed in another thread, to avoid holding up other listeners and the caller of <A HREF="../../javax/management/NotificationBroadcasterSupport.html#sendNotification(javax.management.Notification)"><CODE>sendNotification</CODE></A>. </ul><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="../../javax/management/NotificationBroadcasterSupport.html#NotificationBroadcasterSupport()">NotificationBroadcasterSupport</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> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/management/NotificationBroadcasterSupport.html#addNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)">addNotificationListener</A></B>(<A HREF="../../javax/management/NotificationListener.html" title="interface in javax.management">NotificationListener</A> listener, <A HREF="../../javax/management/NotificationFilter.html" title="interface in javax.management">NotificationFilter</A> filter, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> handback)</CODE><BR> Adds a listener.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../javax/management/MBeanNotificationInfo.html" title="class in javax.management">MBeanNotificationInfo</A>[]</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/management/NotificationBroadcasterSupport.html#getNotificationInfo()">getNotificationInfo</A></B>()</CODE><BR> Returns an array indicating, for each notification this MBean may send, the name of the Java class of the notification and the notification type.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected void</CODE></FONT></TD><TD><CODE><B><A HREF="../../javax/management/NotificationBroadcasterSupport.html#handleNotification(javax.management.NotificationListener, javax.management.Notification, java.lang.Object)">handleNotification</A></B>(<A HREF="../../javax/management/NotificationListener.html" title="interface in javax.management">NotificationListener</A> listener, <A HREF="../../javax/management/Notification.html" title="class in javax.management">Notification</A> notif, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> handback)</CODE><BR> This method is called by <A HREF="../../javax/management/NotificationBroadcasterSupport.html#sendNotification(javax.management.Notification)"><CODE>sendNotification</CODE></A> for each listener in order to send the notification to that listener. </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="../../javax/management/NotificationBroadcasterSupport.html#removeNotificationListener(javax.management.NotificationListener)">removeNotificationListener</A></B>(<A HREF="../../javax/management/NotificationListener.html" title="interface in javax.management">NotificationListener</A> listener)</CODE><BR> Removes a listener from this MBean. </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="../../javax/management/NotificationBroadcasterSupport.html#removeNotificationListener(javax.management.NotificationListener, javax.management.NotificationFilter, java.lang.Object)">removeNotificationListener</A></B>(<A HREF="../../javax/management/NotificationListener.html" title="interface in javax.management">NotificationListener</A> listener, <A HREF="../../javax/management/NotificationFilter.html" title="interface in javax.management">NotificationFilter</A> filter, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> handback)</CODE><BR> Removes a listener from this MBean. </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="../../javax/management/NotificationBroadcasterSupport.html#sendNotification(javax.management.Notification)">sendNotification</A></B>(<A HREF="../../javax/management/Notification.html" title="class in javax.management">Notification</A> notification)</CODE><BR> Sends a notification.</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.<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><A NAME="constructor_detail"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">⌨️ 快捷键说明
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