RE: EJB Performance Question.

[Tim Drury]

Every single one of those calls to dir.getXXX() has to go across the network via RMI.  This is slow.  You are better off using a bulk accessor pattern.  For example, create a new class called DirView which contains all the attributes of your Dir EJB.  Then make a single call to the Dir EJB to get a DirView.  This will cause only 1 RMI call and save you a huge amount of time.   Do you understand?  I can probably pseudo-code an example if necessary.   -tim     -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 14, 2000 3:56 AM To: Orion-Interest Subject: EJB Performance Question. Hi, every one. First i'm sorry for my english.   We use servlet that call EJB. Next is code fraction.   //--------------------------------------------------- public Vector findByFirstPage(DirHome home, Integer rowCount) throws Exception{     Vector rows  = new Vector();   Dir dir = null;     System.out.println("step 11 time : " + (new java.util.Date()));             // call EJB   Collection col = home.findByFirstPage(rowCount.intValue());   Iterator iter = col.iterator();     System.out.println("step 12 time : " + (new java.util.Date()));           while(iter.hasNext()) {     dir = (Dir)iter.next();     rows.add(EJBToRow(dir)); //<------- #### bottle neck #####   }      System.out.println("step 13 time : " + (new java.util.Date()));             return rows;     }   //---------------------------------------------------     Simple code. In while loop, EJBToRow() method take 3 second each call.   Next code is EJBToRow(). Very Simple. Only call EJB Meber methods.    //---------------------------------------------------  public Vector EJBToRow(Dir dir) throws Exception {     Vector row = new Vector();   System.out.println("step 21 time : " + (new java.util.Date()));           row.add(dir.getId());   row.add(new Long(dir.getPId()));   row.add(dir.getName());   row.add(new Long(dir.getSerial()));   row.add(new Long(dir.getChildCount()));   row.add(new Long(dir.getDepth()));   row.add(dir.getPMap());   row.add(dir.getType());   row.add(dir.getUserId());   row.add(dir.getGroupId());   row.add(dir.getOwnerPermR());   row.add(dir.getOwnerPermW());   row.add(dir.getOwnerPermX());   row.add(dir.getGroupPermR());   row.add(dir.getGroupPermW());   row.add(dir.getGroupPermX());   row.add(dir.getOtherPermR());   row.add(dir.getOtherPermW());   row.add(dir.getOtherPermX());   row.add(dir.getCreateDate());   row.add(dir.getUpdateDate());   row.add(dir.getExpireDate());   row.add(dir.getRemark());   System.out.println("step 22 time : " + (new java.util.Date()));             return row;     }  //---------------------------------------------------   What's the key problem?                   e-mail site : [EMAIL PROTECTED] : www.javanuri.com ÀüÈ­ mobile : 02-6257-3002 : 019-255-2855