Manage Learn to apply best practices and optimize your operations.

Dynamic mail file size & quota indicator applet

This tip describes how to create and applet to indicate file size & quotas.

The applet explained below best describes one of the many advantages , and in fact only way(not using agents etc), of java in Lotus Domino.

About the Applet : It displays a progress bar with the current mail file size & quota (if set), and % used.(updated every 10000 Millisecs). Thus giving the user an indication about their mail file usage.

Logic : The applet starts a Thread as soon as it loads and establishes a session with domino. The Thread runs in a infinite loop .ie.,thread sleeps for 10000 millisecs and then fetches the db size, quota and calculates % used. If their is a change in these parameters, the repaint() method of the applet is called to update the progress bar.

How to use : Compile the program (with the right classpath set), create an applet resource. Insert the applet in a form. Set its height ,width to 100 pixels and 30 pixels resp. Create a field near to the applet and find your mail quota and set to this field using postopen method. Ensure Enable java applets is selected in the user preferences.

Applicability : We have customized the welcome page for our organisation and my applet has taken up a corner of it(occupies very little space). So it can be used in the welcome page, mail frameset ,portals etc.

Restriction: Works fine in client. It can be further modified to work on web also (CORBA).

 import java.applet.Applet; import java.awt.Graphics; import java.awt.Color; import java.awt.Font; import lotus.domino.Session; import lotus.domino.DbDirectory; import lotus.domino.Database; import lotus.domino.AppletBase; import lotus.domino.NotesThread;

public class Simple extends AppletBase implements Runnable


 private Session session=null; private DbDirectory dbDir=null; private Database mailDb=null; private double quota=0.0,prevQuota=0.0; private double fileSize=0.0,prevFileSize=0.0; private Thread listener=null; private int usedVal=0;
 public void notesAppletInit() { try { NotesThread.sinitThread(); session = this.getSession(); dbDir = session.getDbDirectory(null); mailDb = dbDir.openMailDatabase(); setBackground(new Color(239,239,239)); if(mailDb!=null) { quota = mailDb.getSizeQuota(); if(quota<=0) { repaint(); } else { listener = new Thread(this); listener.start(); } } } catch(Exception e) { System.out.println("Notes Applet Start Exception " + e); } finally { NotesThread.stermThread(); } } public void run() { try { NotesThread.sinitThread(); while(true) { if(mailDb!=null) { quota = mailDb.getSizeQuota(); fileSize = mailDb.getSize(); } if(quota!=0.0 && fileSize!=0.0) { quota = quota/1024; fileSize = fileSize/(1024*1024); usedVal = (int) Math.floor((fileSize/quota)*100); if(quota!=prevQuota || fileSize!=prevFileSize) { prevQuota = quota; prevFileSize = fileSize; repaint(); } listener.sleep(10000); } } } catch(Exception e) { System.out.println("Run Exception " + e); } finally { listener=null; NotesThread.stermThread(); } } public void paint(Graphics g) { try { NotesThread.sinitThread(); if(quota<=0) { g.drawString("Mail quota is not set",1,15); } else { g.setColor(new Color(11,148,212)); g.fill3DRect(0,0,usedVal,30,true); g.setColor(; g.setFont(new Font("Arial",Font.PLAIN,9)); if(usedVal<=15) { g.drawString(Math.ceil(fileSize)+" mb",10,12); g.drawString(usedVal +" %",10,28); } else if(usedVal>=85) { g.drawString(usedVal +" %",75,28); g.drawString(Math.ceil(fileSize)+" mb",60,12); } else { g.drawString(usedVal +" %",usedVal-12,28); g.drawString(Math.ceil(fileSize)+" mb",usedVal-12,12); } } } catch(Exception e) { System.out.println("Paint Exception " + e); } finally { NotesThread.stermThread(); } } public void notesAppletDestroy() { try { session = null; dbDir = null; mailDb = null; } catch(Exception e) { System.out.println("Destroy Exception " + e); } } }
This was last published in August 2002

Dig Deeper on Domino Resources - Part 4

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.




  • iSeries tutorials's tutorials provide in-depth information on the iSeries. Our iSeries tutorials address areas you need to know about...

  • V6R1 upgrade planning checklist

    When upgrading to V6R1, make sure your software will be supported, your programs will function and the correct PTFs have been ...

  • Connecting multiple iSeries systems through DDM

    Working with databases over multiple iSeries systems can be simple when remotely connecting logical partitions with distributed ...