Class SystemInfoServlet

java.lang.Object
javax.servlet.GenericServlet
javax.servlet.http.HttpServlet
com.netscape.cms.servlet.base.SystemInfoServlet
All Implemented Interfaces:
Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig
public class SystemInfoServlet extends javax.servlet.http.HttpServlet
Displays detailed information about java VM internals, including current JVM memory usage, and detailed information about each thread.

Also allows user to trigger a new garbage collection

Version:
$Revision$, $Date$
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    SystemInfoServlet()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    init(javax.servlet.ServletConfig sc)
     
    void
    service(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)
    service the request, returning HTML to the client.

    Methods inherited from class javax.servlet.http.HttpServlet

    doDelete, doGet, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service

    Methods inherited from class javax.servlet.GenericServlet

    destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • SystemInfoServlet

      public SystemInfoServlet()

  • Method Details

    • init

      public void init(javax.servlet.ServletConfig sc) throws javax.servlet.ServletException
      Specified by:
      init in interface javax.servlet.Servlet
      Overrides:
      init in class javax.servlet.GenericServlet
      Throws:
      javax.servlet.ServletException

    • service

      public void service(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException, IOException
      service the request, returning HTML to the client. This method has different behaviour depending on the value of the 'op' HTTP parameter.
      • op = undefined - display a menu with links to the other functionality of this servlet
      • op = gc - tell the JVM that we want to do a garbage collection and to run finalizers (@see java.lang.Runtime.getRuntime#gc() )
      • op = general - display information about memory, and other JVM informatino
      • op = thread - display details about each thread.
      Overrides:
      service in class javax.servlet.http.HttpServlet
      Throws:
      javax.servlet.ServletException
      IOException
      See Also:
      • HttpServlet.service(HttpServletRequest, HttpServletResponse)