mlet.html

j2ee api,很好的api。我这现在有

 instance of each MBean specified in the file is created and registered.
 <P>
 The m-let Service extends the <CODE>java.net.URLClassLoader</CODE> and can be used to load remote classes
 and jar files in the VM of the agent.
 <p><STRONG>Note - </STRONG> The <CODE>MLet</CODE> class loader uses the <A HREF="../../../javax/management/MBeanServerFactory.html#getClassLoaderRepository(javax.management.MBeanServer)"><CODE>MBeanServerFactory.getClassLoaderRepository(javax.management.MBeanServer)</CODE></A>
 to load classes that could not be found in the loaded jar files.
<P>

<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../serialized-form.html#javax.management.loading.MLet">Serialized Form</A></DL>
<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/loading/MLet.html#MLet()">MLet</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new MLet using the default delegation parent ClassLoader.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#MLet(java.net.URL[])">MLet</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>[]&nbsp;urls)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new MLet for the specified URLs using the default delegation parent ClassLoader.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#MLet(java.net.URL[], boolean)">MLet</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>[]&nbsp;urls,
     boolean&nbsp;delegateToCLR)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new MLet for the specified URLs using the default delegation parent ClassLoader.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#MLet(java.net.URL[], java.lang.ClassLoader)">MLet</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>[]&nbsp;urls,
     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/ClassLoader.html" title="class or interface in java.lang">ClassLoader</A>&nbsp;parent)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new MLet  for the given URLs. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#MLet(java.net.URL[], java.lang.ClassLoader, boolean)">MLet</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>[]&nbsp;urls,
     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/ClassLoader.html" title="class or interface in java.lang">ClassLoader</A>&nbsp;parent,
     boolean&nbsp;delegateToCLR)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new MLet  for the given URLs. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#MLet(java.net.URL[], java.lang.ClassLoader, java.net.URLStreamHandlerFactory)">MLet</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>[]&nbsp;urls,
     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/ClassLoader.html" title="class or interface in java.lang">ClassLoader</A>&nbsp;parent,
     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URLStreamHandlerFactory.html" title="class or interface in java.net">URLStreamHandlerFactory</A>&nbsp;factory)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new MLet for the specified URLs, parent class loader, and
 URLStreamHandlerFactory. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#MLet(java.net.URL[], java.lang.ClassLoader, java.net.URLStreamHandlerFactory, boolean)">MLet</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>[]&nbsp;urls,
     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/ClassLoader.html" title="class or interface in java.lang">ClassLoader</A>&nbsp;parent,
     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URLStreamHandlerFactory.html" title="class or interface in java.net">URLStreamHandlerFactory</A>&nbsp;factory,
     boolean&nbsp;delegateToCLR)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructs a new MLet for the specified URLs, parent class loader, and
 URLStreamHandlerFactory. </TD>
</TR>
</TABLE>
&nbsp;
<!-- ========== 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>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#addURL(java.lang.String)">addURL</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;url)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Appends the specified URL to the list of URLs to search for classes and
 resources.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#addURL(java.net.URL)">addURL</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>&nbsp;url)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Appends the specified URL to the list of URLs to search for classes and
 resources.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#check(java.lang.String, java.net.URL, java.lang.String, javax.management.loading.MLetContent)">check</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;version,
      <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>&nbsp;codebase,
      <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;jarfile,
      javax.management.loading.MLetContent&nbsp;mlet)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This method is to be overridden when extending this service to
 support caching and versioning.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Class.html" title="class or interface in java.lang">Class</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#findClass(java.lang.String)">findClass</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;name)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This is the main method for class loaders that is being redefined.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected &nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#findLibrary(java.lang.String)">findLibrary</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;libname)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the absolute path name of a native library. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#getLibraryDirectory()">getLibraryDirectory</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Gets the current directory used by the library loader for
 storing native libraries before they are loaded into memory.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Set.html" title="class or interface in java.util">Set</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#getMBeansFromURL(java.lang.String)">getMBeansFromURL</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;url)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loads a text file containing MLET tags that define the MBeans to
 be added to the agent. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Set.html" title="class or interface in java.util">Set</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#getMBeansFromURL(java.net.URL)">getMBeansFromURL</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>&nbsp;url)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Loads a text file containing MLET tags that define the MBeans to
 be added to the agent. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/net/URL.html" title="class or interface in java.net">URL</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#getURLs()">getURLs</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the search path of URLs for loading classes and resources. 
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Class.html" title="class or interface in java.lang">Class</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#loadClass(java.lang.String, javax.management.loading.ClassLoaderRepository)">loadClass</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;name,
          <A HREF="../../../javax/management/loading/ClassLoaderRepository.html" title="interface in javax.management.loading">ClassLoaderRepository</A>&nbsp;clr)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Load a class, using the given <A HREF="../../../javax/management/loading/ClassLoaderRepository.html" title="interface in javax.management.loading"><CODE>ClassLoaderRepository</CODE></A> if
 the class is not found in this MLet's URLs.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/management/loading/MLet.html#postDeregister()">postDeregister</A></B>()</CODE>