Class SystemInfoServlet

java.lang.Object
jakarta.servlet.GenericServlet
jakarta.servlet.http.HttpServlet
com.netscape.cms.servlet.base.SystemInfoServlet
All Implemented Interfaces:
jakarta.servlet.Servlet, jakarta.servlet.ServletConfig, Serializable
public class SystemInfoServlet extends jakarta.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:

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    protected jakarta.servlet.ServletConfig
    servletConfig
     
    protected jakarta.servlet.ServletContext
    servletContext
     

    Fields inherited from class jakarta.servlet.http.HttpServlet

    LEGACY_DO_HEAD

  • Constructor Summary

    Constructors
    Constructor
    Description
    SystemInfoServlet()
     

  • Method Summary

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

    Methods inherited from class jakarta.servlet.http.HttpServlet

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

    Methods inherited from class jakarta.servlet.GenericServlet

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

    Methods inherited from class Object

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

  • Field Details

    • servletConfig

      protected jakarta.servlet.ServletConfig servletConfig

    • servletContext

      protected jakarta.servlet.ServletContext servletContext

  • Constructor Details

    • SystemInfoServlet

      public SystemInfoServlet()

  • Method Details

    • init

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

    • getCMSEngine

      public CMSEngine getCMSEngine()

    • service

      public void service(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response) throws jakarta.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 jakarta.servlet.http.HttpServlet
      Throws:
      jakarta.servlet.ServletException
      IOException
      See Also:
      • HttpServlet.service(HttpServletRequest, HttpServletResponse)