The best way to implement connect pool?

Hi:
In my web application, I use javabean to access database for JSP, Because a lot of poeple will access my site, I need coonection pool. Then, If I still use JSP,Is it right I should use javabean to access coonection pool? If it is, Am I need another connection pool bean? Or I should switch to Servlet , I might need write a ancestor servlet to access the pool, and other servlet extend the ancestor servlet. Is there other suggestion for me?
I am a newer to java, any suggestion will be greatly appreciated!
Thanks a lot!
xufang

Hi, Gregor
Thanks for your reply, I instance my DBConnectionManager in the Bean's constructor as:
connMgr= connMgr.getInstance();
and in the bean's getConnection method, I request a connection provided by the pool as:
Connection dbCon = connMgr.getConnection("idb");
and and in the bean's execSQL method , I use the dbCon as:
s = dbCon.createStatement( );
ResultSet r = s.executeQuery(sql);
The problem is when JSP go to bean.getConnection,it's all right. But when JSP execute bean.execSQL, There is always wrong because the dbConn I get from the bean's getConnection method if null ! Can you tell me what's the problem arrives?
Thanks,
xufang

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import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
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But i am unable to compile it and i am also getting lots of warnings.
I am getting error at line
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Unhandled exception type SQLException loginServlet.java TQ3/WEB-INF/src/login line
Following warnings:
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The serializable class DBTest does not declare a static final serialVersionUID field of type long loginServlet.java
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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
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regards
Manisha

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[JHeadstart 10.1.3 build 78]
[JDeveloper 10.1.3 SU4]
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<?xml version="1.0" encoding="windows-1252"?>
<!DOCTYPE faces-config PUBLIC
"-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN"
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<Attr Name="_version" Value="10.1.3.36.73" />
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I did not use any BPS or IP planning functions; that might be an approach, but I've never worked with either application. The calculation, in my case, was done in ABAP.
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There is also the documentation in the BAdI which explains exactly which importing/exporting parameters exist. IT_SEL will include things like group currency, period, year, FYV, cons group, company, etc. ET_MESSAGE will determine the cons monitor status when you are finished. You can show additional results on the screen (like a regular BCS task would produce), but you need to write your own ALV. I don't believe it is possible for this list to be available with the "last log" functionality though (I could never find a way, at least).
uc_task_custom method is only to change status monitor
I would disagree. The exporting parameters, as mentioned above, determine the monitor status. But it's also an entry point for you to develop whatever you need to meet your requirements. Need to have a document approval process for manual documents? You can write a custom task for that. Need to post equity pickups back to the GL? You could write a custom task to call an RFC or BAPI in ECC and do that. Need to export results from from the BCS virtual cube to a flat file, basic cube, or an end user's PC? I'd write a custom task. Custom Document? Custom Task.
The issue becomes that greater development effort is required to create a custom task, than to customize a reclassification or an open hub. If the standard functionality does not meet your requirements though, you can either change the requirements or hire a developer to implement them.
- Chris

The best way to implement user's access level via Servlet & JSP (or more)?

Hi all,
I am trying to implement user's access level in an application to allow certain access to certain page or components within a page (buttons, etc.). From my experience with JSP, Java, servlet, I am think of having the jsp/servlet to check for user's access level to decide what jsp components or forward page to go to next but that doesn't seem clean or elegant way to handle it.
Any suggestions of how to do this? Are there other technologies (Struts) out there that can handle this?
Thanks so much in advance for your feedback or suggestion,
Thong Bui

I haven't experienced a lot in defining security roles before, and there is probably a lot to learn about this area. However I might be able to assist you in some way. Whenever I have 2 or more objects that need to be stored in the session, I create a class called UserContainer. Say you have three properties:
empSsn (String) , isAdmin (Boolean), isAgent (Boolean), then:
public class UserContainer implements Serializable {
private String empSsn = null;
private Boolean isAdmin = null;
private Boolean isAgent = null;
public UserContainer() {
super();
public void setIsAdmin(Boolean isAdmin) {
this.isAdmin = isAdmin;
public Boolean getIsAdmin() {
return this.isAdmin;
// getters and setters for the other properties
Of course after you decide (in your sevlet) whether the app user is an administrator or an agent, you can set the corresponding property in the user container, and then save it in the session. Afterwords, in any jsp, you can decide to display a certain element (e.g a button) after you check the user's role. Example:
// Welcome.jsp
<% UserContainer userContainer = (UserContainer) session.getAttribute("userContainer");
boolean isAdmin = userContainer.getIsAdmin().booleanValue();
boolean isAgent = userContainer.getIsAgent.booleanValue();
if(isAdmin) { %>

<% } if(isAgent) { %>

<% } >Of course, this is a very simple way of doing such a task, you will find more secure ways if you look at LDAP or something of that matter.
Cheers

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