Building a tool to monitor who is logged on to an SAP NetWeaver Portal…

One of the most commonly asked questions in the portal forums is how to see who is logged on to a portal. While I’m not completely sure why people want to know this, I decided to try and put together a tool to help. “);

          out.close();

          File uFile = new File(“
temp
user_”+from);

          BufferedWriter     o1 = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(uFile,false), “UTF8”));

          o1.write(L.toString());

          o1.close();

          } catch (Exception e) {};

     }

     public void doContent(IPortalComponentRequest request, IPortalComponentResponse response)

     {

     }

     }

A bit of testing of the component by POSTing from a static HTML form seems to do the trick, so it’s now time to replace the runtime version of the current SessionManager.jsp. This is done as a portal admin by restarting the com.sap.netweaver.coll.appl.ui.rtc archive: System admin -> Support -> Portal Runtime -> Application Console Find com.sap.netweaver.coll.appl.ui.rtc And then restart.

Now we need a quick portal component to report on files in \temp with a last stored date within the last 10 seconds and I have a component for listing currently logged on users:

package com.sap.anz;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.util.Date;

import com.sapportals.portal.prt.component.AbstractPortalComponent;

import com.sapportals.portal.prt.component.IPortalComponentRequest;

import com.sapportals.portal.prt.component.IPortalComponentResponse;

public class List extends AbstractPortalComponent

{

    public void doContent(IPortalComponentRequest request, IPortalComponentResponse response)

    {

          response.write(“h2. Currently logged on users

“);

          Date now = new Date();

          long l = now.getTime();

          try {

               File dir = new File(“
temp”);

               File[] fs = dir.listFiles();

               for( int i = 0, ii = fs.length; i < ii; i++ ) {

                    String thisone = fs[i].getName();

                    if (thisone.startsWith(“user_”)) {

                         File f = new File(“
temp
“+thisone);

                         BufferedReader i1 = new BufferedReader(new FileReader(f));

                         String line = i1.readLine();

                         i1.close();

                         long diff = l – new Long(line).longValue();

                         if (diff < 10000) // seconds * 1000
response.write(“
“+thisone.substring(5));
}
}
} catch (Exception e) {
}
}
}