Best way to use Sun Web Server connection pooling with Web Application?

I have a number of applications that run Oracle and MySQL queries via Sun Web Server 6.1. I use the Web Server's built-in connection pooling, which works fairly well.
As an interface with the connections I receive from the Web Server, I use a class, which (1) accepts the SQL and database name from a tool, (2) Opens the connection, runs the SQL, closes the connection, (3) puts the content of the result set into a Vector of Hashtables, (4) returns that Vector to the tool.
Why do I use this Vector? That way, in my applications, I don't have to deal with opening connections (or getting them from the pool) and I don't have to worry about closing connections, because that's done automatically by the interface class.
Is this a dumb approach to use? I'm a bit paranoid about open DB connections, because we have had a number of problems where connections would not be closed, go stale in oracle, and clog up the database resources.
Can you suggest a better way to (1) smartly control opening and closing connections, and (2) enabling fast database access?
Sorry, but given this Java/Sun Web Server double topic, I'm going to post the same message on the Web Server board.
Any tips?
dailysun
P.S. For instance, in my tool, I call the interface class in this manner:
Vector results_v = Database.getSelect("SELECT * FROM TEST","database1");
getSelect uses the first string as the SQL and the second string as the jndi name of the Web server's database resource. getSelect does all the context stuff to get a connection from the pool, runs the SQL, puts the resultset into a Vector of Hastables (where each row is one Hashtable), and returns the Vector.

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Sun One Web Server connection pool goes stale after some time

Hi all,
I have a few web applications running on Sun One Web Server 6.1 (SP4). I configured a connection pool via the web admin of the web server. I do not know why the connections in the connection pool are never released after some time (this happened for 3 times with a couple of months in between). I need to reboot the web server to solve this problem everytime the connection pool goes stale. I have verified that the resources are released (stream and connection are closed) with proper programming logic. Even so, I think that the connections will be timed out (the setting is 5 minutes) by the web server as a bulletproof even if the resource is not released properly as implemented in the code logic. Can anybody help on this? I have been troubled by this problem by weeks.
Thank you in advance.

Hi all,
I have a few web applications running on Sun One Web Server 6.1 (SP4). I configured a connection pool via the web admin of the web server. I do not know why the connections in the connection pool are never released after some time (this happened for 3 times with a couple of months in between). I need to reboot the web server to solve this problem everytime the connection pool goes stale. I have verified that the resources are released (stream and connection are closed) with proper programming logic. Even so, I think that the connections will be timed out (the setting is 5 minutes) by the web server as a bulletproof even if the resource is not released properly as implemented in the code logic. Can anybody help on this? I have been troubled by this problem by weeks.
Thank you in advance.

Sun Portal Server 6 compatibility with Web Server 6.1 SP - 8

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What's the best way to use a cloned Snow Leopard drive with an iBook?

My aging and ailing MacBook Pro is going in for Apple Care.
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AstroMacMan wrote:
Appreciate that extra tidbit, although that's not exactly true, is it? I mean, I had a cloned Leopard MBP and a cloned Tiger hard drive that do boot from the iBook!
If we could distinguish and separate the hardware drivers, download them from Apple etc., then it could be said we can use a clone on another model of Mac provided: A, B and C are met.
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Difference between using app server connection pooling and using the driver

Hi all,
How to get connection pooling with out application server and tomcat also?
What is the difference between using app server connection pooling and using the driver supported connection pooling?
Regards,
Murali

maybe the performance of App server pool is better than the JDBC pool,
for you don't know wether the implementation of the JDBC interface is good or bad.

Repost-Best way of using connection pooling

I am reposting this, seems best suitable in this category.
I am using Eclipse 3.1 along with Tomcat 5.0, MySQL 4.1, J2EE1.4. I could set up the JNDI Dataresource connection pooling and tested with small test servlet. Now thinking of having common methods for getting connection / closing / commiting ....etc.
I wrote following. [Please let me know whether it is correct way of doing it - as i am not very sure]
package common;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
import org.apache.log4j.Logger;
public final class connectionManager {
     private static Logger logger = Logger.getLogger(common.connectionManager.class);
     public connectionManager() {}
     public static Connection getConn () throws NamingException, SQLException
//JNDI DataSource connection pooling
          Connection conn = null;
          try{
               Context initContext = new InitialContext();
               Context envContext = (Context)initContext.lookup("java:/comp/env");
               DataSource ds = (DataSource)envContext.lookup("jdbc/TQ3DB");
               conn = ds.getConnection();
          }catch (NamingException ne) {
              new GlobalExceptionHandler(logger, ne);
               conn = null;
               throw new NamingException();
          }catch (SQLException e){
               new GlobalExceptionHandler(logger, e);
               conn = null;
               throw new SQLException();
          return conn;
     }//getConnection
     public static void commit(Connection conn) throws SQLException
          conn.commit();
     public static void rollback(Connection conn) throws SQLException
          conn.rollback();
     public static void setAutoCommit(Connection conn, boolean autoCommit)
                                    throws SQLException
          conn.setAutoCommit(autoCommit );
     public static void closeConnection(Connection conn) throws SQLException{
          if (conn != null) {
               conn.close();
               conn = null;
     }//closeConnection
     public static void closeResources(ResultSet oRS, PreparedStatement pstmt) throws SQLException
          if (oRS != null) {
               oRS.close();
               oRS = null;
          if (pstmt != null) {
                    pstmt.close();
                    pstmt = null;
     } // closeResources
}//ConnectionManager
I am having a login form which submits user name and password. I am checking this against the database. Following is the servlet to do that.
package login;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import common.*;
public class loginServlet extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response)
               throws ServletException, IOException {
          doPost(request, response);
     }//doGet
     public void doPost(HttpServletRequest request, HttpServletResponse response)
               throws ServletException,IOException{
          String userId = request.getParameter("userId");
          String password = request.getParameter("password");
          ** call a method to validate the password which will return the
          ** User Name for authorized users and null string for un-authorised.
          String uName = validateUser(userId, password);
          //if uName is null .. user is not authorized.
          if (uName == null){
               //redirect to jsp page with error message
              RequestDispatcher rd =
                   getServletContext().getRequestDispatcher("/jsps/mainmenu.jsp");
              if (rd != null){
                   rd.forward(request,response);
          else{
               // the user is valid - create a seesion for this user.
               HttpSession userSession = request.getSession(true);
               // put the user name session variable.
               userSession.setAttribute("userName", uName);
               //redirect to Main menu page
               RequestDispatcher rd =
                    getServletContext().getRequestDispatcher("/jsps/mainmenu.jsp");
               if (rd != null){
                    rd.forward(request,response);
     }// end of doPost
     private String validateUser(String userId, String password)
               throws SQLException{
          String returnVal = null;
          connectionManager cm = new connectionManager();
          Connection conn = null;
          PreparedStatement pstmt = null;
          ResultSet oRS = null;
          try{
               //get the connection
               conn = cm.getConn ();
               //get records from user table for this user id and password
               String sQry = "SELECT user_login FROM user "
                         + "where user_login = ? AND user_pwd = ? ";
               pstmt = conn.prepareStatement(sQry);
               pstmt.setString(1, userId);
               pstmt.setString(2, password);
               oRS = pstmt.executeQuery();
               //check for record
               if (oRS.next()) {
                    returnVal = oRS.getString("user_login");
               }else {returnVal = null;}
             }catch (Exception e){
                  returnVal = null;
          }finally{
               cm.closeResources(oRS, pstmt);
               cm.closeConnection(conn);
          return returnVal;
}// end of servlet class
But i am unable to compile it and i am also getting lots of warnings.
I am getting error at line
1)String uName = validateUser(userId, password);
Unhandled exception type SQLException loginServlet.java TQ3/WEB-INF/src/login line
Following warnings:
2)For loginServlet Declaration
The serializable class DBTest does not declare a static final serialVersionUID field of type long loginServlet.java
3)The static method getConn() from the type connectionManager should be accessed in a static way
4)The static method closeResources(ResultSet, PreparedStatement) from the type connectionManager should be accessed in a static way
5)The static method closeConnection(Connection) from the type connectionManager should be accessed in a static way
Definitely I am doing it wrong but exactly where? I am having very strong doubt the way i am using connections is not the correct way. Pls help me.
regards
Manisha

I am in a search of best way to use connection pooling. Initially was using simple JDBC call, then modified to JNDI, afterwards tried to have common class. Later came accross the idea of Singleton/Static. I wanted to have a common class which will handle all connection related issues and at the same time give good performance.
With due respect to all Java Gurus: i got all from web articles/tutorials/java forum etc. There is a long discussion regarding Singlet vs static in this forum. But finally got confused and could not figure out in my case which method shall i make use of, so tried both.
What I want is somebody pointing out flwas inside my 2 code snippets and guide me about which method shall i adopt in future.
Static way:
package common;
import java.sql.Connection;
import javax.sql.DataSource;
import java.sql.SQLException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
public final class ConnectionManager_Static {
     private static InitialContext ctx = null;
     private static DataSource ds = null;
     public ConnectionManager_Static(){     }
     //as the staic method is updating static var i am synchonizing it
     private static synchronized void getDatasource () throws NamingException, SQLException
          if (ds == null){
               ctx = new InitialContext();
               ds = (DataSource)ctx.lookup("java:comp/env/jdbc/MySql");
     //making getConnection() also static as it is not instance specific
     public static Connection getConnection () throws NamingException, SQLException, Exception
          Connection conn = null;
          try{
               if (ds == null) {getDatasource ();}
               if (ds != null) {
                    conn = ds.getConnection();
          }catch (Exception e){
               throw new Exception("From ConnectionManager_Static",e);
          return conn;
     }//getConnection
}Singleton:
package common;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
public final class ConnectionManager_Singleton {
         private static ConnectionManager_Singleton INSTANCE = null;
          private DataSource datasource = null;
          // Private constructor for singleton pattern
         private ConnectionManager_Singleton() throws NamingException{
               Context ctx = new InitialContext();
               datasource = (DataSource)ctx.lookup("java:comp/env/jdbc/MySql");
         //synchronized creator for multi-threading issues
         //another if check to avoid multiple instantiation
         private synchronized static void createInstance() throws NamingException{
             if (INSTANCE == null) {
                 INSTANCE = new ConnectionManager_Singleton();
         public static ConnectionManager_Singleton getInstance() throws NamingException {
             if (INSTANCE == null) createInstance();
             return INSTANCE;
          public Connection getConnection() throws Exception
               Connection con = null;
               try{
                    con = datasource.getConnection();
               }catch(Exception e){
                    throw new Exception("From connection manager singleton ", e);
               return con;
}Sorry, It's becoming long.
Thanaks in advance,
Manisha

Integration of Sun One Web Server 6.0 with Sun One App Server 7.0

Is it possible to integrate Sun One Web Server 6.0 with the Sun One App Server 7.0??
Sun One App Server 7.0 comes with the in-built HTTP listener. But we want to know if there is a way by which we can use the Sun One Web Server 6.0 with the App Server 7.0 and not the in-bulit HTTP listener?

As suggested by you, I have used Sun ONE Application Server 7's plugin to connect the Sun ONE Web Server 6.0 with Sun ONE Application Server 7 as per the information given in Sun ONE Application Server 7 Administrator's Guide.
I have added the plugin package to the webserver and added the following into the magnus.conf:
Init fn="load-modules" shlib="C:/iPlanet/Servers/plugins/passthrough/passthrough.dll" funcs="init-passthrough,auth-passthrough,check-passthrough,service-passthrough" NativeThread="no"
Init fn="init-passthrough"
and to the obj.conf
NameTrans fn="assign-name" from="(/A2P2Test|/A2P2Test/*)" name="passthrough"
<Object name="passthrough">
ObjectType fn="force-type" type="magnus-internal/passthrough"
Service type="magnus-internal/passthrough" fn="service-passthrough" servers="http://<application server http listener>"
Error reason="Bad Gateway" fn="send-error" uri="$docroot/badgateway.html"
</Object>
The webserver starts up without any errors but never forwards any requests what might I be doing wrong?

What's is the best way to use iPhoto? I need to understand.

What's is the best way to use iPhoto? I need to understand.
I guess the iPhoto is only for people with 5,000 of personal photos.
Or even 200,000, but they can't use this app everyday.
I'm not talk about working as a photographer. They use Aperture.
They may use iPhoto like a family album that you take a look sometimes.
And don't care about putting photos from the camera or from internet everyday.
I have tons of music and I love iTunes 8, works great. So I tried but I can't stand iPhoto anymore.
I have over 173,000 photos. My goal is organize, have total control, crop in Preview and delete them fast as I can.
The iPhoto is too slow. And is not only about performance, more RAM... but the whole concept.
Finder is much better/richer/flexible to organize than iPhoto.
I'm not talking about the photographer workflow.
And I'm not talking about editing and all these great photo features, the search, and all the iLife environment. They are amazing.
When I'm iPhoto, I feel like a prisioner.
I can't open an album/folder/event alone just to take a look, without do lanch the iPhoto app with the all thousand photos together. And it's slow.
I can't use Quick Look there.
So, I'll use Finder for manage/crop/etc. But what's the best way to use iPhoto in my case? Put the best/key ones there to use in iLife/MobileMe? To do a more serious editing? I like the features: keywords/ratings/hidden photos/events... It would be cool this features in Finder.
For example:
iMovie: Manage movies? NO. It's editng only.
iTunes: Manage music/small video/podcast...? OK. Editing the song? OK for tags/convert/artwork/equalizer... For music there's a GarageBand of course.
iPhoto: Manage photos? Yes and No.
I think Finder would kill iPhoto incoporating all the editing features in Preview and the rich manage in Finder.
Jobs said that no one care about iDVD anymore. They care about the web.
Using iMovie to export to MobileMe.
Maybe iPhoto become less important in a near future. With a better Finder+Preview Right?
Sorry for this long text with a short question.
Thanks.

Your post demonstrates exactly why I keep saying that iPhoto is not the application for you.
It would be better an iPhoto organizing photos by words like when iTunes browse his music.
Why on earth would anyone want to organise photos by words? A list mode is entirely pointless in a Photo application. That's like having an old photo album organised with the photos facing inwards so you can read the back of the picture.
Again, this is a characteristic of a File browser. You don't want a Photo organiser, you want a file organiser.
And, in iPhoto, you can search by tags, effortlessly in either the search box or by using a Smart Album.
iPhoto always loads all that events and all the thumbs library to scroll, and I think it's overkill.
So, how is iPhoto to know which ones you want to work with today? Open a library, get the Library.
Would be better a Cover Flow option to browsing in Events.
You've obviously never tried scrubbing along the Event icon.
Imagine iTunes using Cover Flow mode all the time. It won't be too useful.
Many, many people do, including myself on a library of 20k tracks totalling more that 100 gigs, and find it very useful. Same with the Finder.
And if when iTunes Store starts to sell photos?
Why on earth would the iTunes store start to sell photos?
My photos are not junk,
I didn't say there were. Read my post again.
When I said Finder to crop photos I mean Preview. But I feel in Finder. Because what's in Preview? A photo opened with a Preview's menubar and some cocoa APIs like adjustments. Not?
Oh, so you don't count Preview as an application. Fine. It is an application but you don't feel it. As you wish.
My point to you is very simple: Because of the way you want to organise your pics - using lists views and so on - iPhoto is not the application for you. Don't use it. But you keep writing things about the application that are untrue, and I'm aware that other folks search these forums and I don't want them to have inaccurate information about iPhoto.
Regards
TD

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Hi,
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Hi,
I have got a situation where i need to use sun java server to authenticate users and groups who can log into the BPEL worklist application.
This is what i have done.
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Hello all,
I have several photos.
I also have three computers that I regularly use: my Windows PC, my Macbook Pro, and a very new iMac.
Rather than place all my photos on each computer... I thought I could place them on a Western Digital Passport portable ext. drive. Then somehow use the drive from computer to computer to edit/play with my photos.
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I only have one PowerBook, not multiple computers, but, other than that, the situation's the same. You want to keep your iPhoto collection off your computers, and onto one external drive. I hope this information can be of some help to you.
All best wishes... Cea

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Hello,
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G5 Quad / PowerBook G4 17' 1.67ghz Mac OS X (10.4.6)

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