Servlet : how to implement isclientconnected

Is there a way to check if a client is still connected to the response.

You may consider kind of timed AJAX polls/pings from
the client to the server to let the server know that
the client is still alive.I'm talking of a 30 giga, 60 table database with queries joining till 10 tables & views.
I'm searching for a decent ajax solution now, but can't find one.
http://ajaxpatterns.org/Periodic_Refresh
or
http://ajaxpatterns.org/Heartbeat
looks interresting

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How to implement this function in JSP/Servlet env?

Hi all,
I working on a project, it provides functionality to upload file using JSP/Servlet. In the first JSP page, there is file location and submit button. After user select a file to upload and click submit button, a message, like "sending file to XXXX", will be shown on the screen. Once uploading and validation are done on the server-side, a successful/error msg will be shown to user.
Here I have a question for the "sending..." msg and the successful/error msg. They should be put in one jsp page or in two separate page? how to implement them?
Thanks for any help!
Tranquil

For the sending message... Well, the thing is, when you click submit, it's sending the file to the server and the server is processing it, and this is all done before the "complete" page is sent to the server. So one would need to use some Javascript on the page before the actual submit happens to show some message. This is done on Ebay when you put something for sale, you can upload an image, and there is a little popup message telling you that it's uploading, and it is removed when the process is done. Now, I'm not sure the exact details of how this works, but my educated guess is this:
1) The onsubmit function of the form checks that the file upload fields have a value (no need to popup a message if no file upload, since that's what usually takes the time, although it could just be assumed there is a file). If a file is to be uploaded, or just want to show the message anyway, a new popup window is opened with the window.open method and the "sending" message is shown (either written via Javascript or just load a small web page to the window).
2) The popup window, since you can't transfer the window object from the form page to the next page, has to check window.opener for some value that the success/error page would have to set. The success/error page could use it's body onload function to set a variable in it's own window object to denote that the page is loaded. The popup window can use a looping check using setTimeout or setInterval in Javascript to check for window.opener.isLoadedVariable to be present, and if so, close itself.
I've never done that, but I see no reason why it wouldn't work.

How to implement a connection pooling in servlet

hi all,
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Sudha

Take a look at JNDI
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html

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YH

Hi sangee,
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Hello All,
I am working in Enterprise Portal 7.0.
I wanted to customize self registraion page in my portal in SAP Netweaver 7.0.
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Hi,
I am able to run that component, but its giving another error such as:
Java iView Runtime
Version : 7.00.200702010738
An exception occured while processing your request.
com.sapportals.portal.prt.dispatcher.DispatcherException: Could not find connection portla
com.sapportals.portal.prt.dispatcher.DispatcherException: Could not find connection portla
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     at java.security.AccessController.doPrivileged(Native Method)
     at com.sapportals.portal.prt.dispatcher.Dispatcher.service(Dispatcher.java:405)
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     at com.sap.engine.services.servlets_jsp.server.servlet.InvokerServlet.service(InvokerServlet.java:156)
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     at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:387)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:365)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:944)
     at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:266)
     at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
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     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:170)
If this situation persists, please contact your system administrator.
Please let me know your comment about this Error.
Thank you so much in Advance.
Thanks,
Pallavi

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check out this link for ideas. You may even want to use the technology.
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Hello everyone,
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You mean actually you are caching the response stream
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servlet.....really interesting...Do I get it right ?Yes that's it in a nutshell.
>
Then how do you build those response streams in
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>
Thanks again !
Rachel

In the jspdynpage how to implements file download!!!!

in the jspdynpage how to implements file download!!!!
in the portal's view i need to implements download file like *.xls,i don't know how to do. and if servlet can be used in the portal application!
Edited by: xuhuanjun on Apr 8, 2009 9:57 AM

Hi,
Check the below thread that will help you.
How to get a file download window using URL component in HTMLB/JSPDynpage
Raghu

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I have two questions.
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If a organization have 200 to 300 daily complains of there IT equipment/Software/Network e.t.c.
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How to implement implicit and explicit enhancement points

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Rgds
sudhanshu

Hi,
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How many types of authentications in sharepoint and how to implement those authentication in sharepoint?

Hi All,
How many types of authentications in sharepoint and how to implement those authentication in sharepoint?
can any one explain the above things with examples?
Thanks in Advance!

In addition to
A Sai Gunaranjan you can also check this URL for Sharepoint 2010:
http://technet.microsoft.com/en-us/library/cc288475(v=office.14).aspx
http://www.codeproject.com/Tips/382312/SharePoint-2010-Form-Based-Authentication
***If my post is answer for your query please mark as answer***
***If my answer is helpful please vote***

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Regards,
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I would suggest that you use the
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Can't Figure Out How To Implement IEnumerable T

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class PeopleCollection : IEnumerable
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public PeopleCollection() { }
public IEnumerator GetEnumerator()
return people.GetEnumerator();
class Program
static void Main(string[] args)
PeopleCollection collection = new PeopleCollection();
foreach (Person p in collection)
Console.WriteLine(p);
I'm trying to do the same thing (using a List<Person> as the member variable instead of ArrayList) but get compile errors involving improper return types on my GetEnumerator() method. I start out with this:
class PeopleCollection : IEnumerable<Person>
List<Person> myPeople = new List<Person>();
public PeopleCollection() { }
public IEnumerator<Person> GetEnumerator()
throw new NotImplementedException();
IEnumerator IEnumerable.GetEnumerator()
throw new NotImplementedException();
class Program
static void Main(string[] args)
// Create a PeopleCollection object.
PeopleCollection peopleCollection = new PeopleCollection();
// Iterate over the collection.
foreach (Person p in peopleCollection)
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The List<T> class implements the IEnumerable<T> interface, so your enumerator can return the GetEnumerator call from the list.
class PeopleCollection : IEnumerable<Person>
List<Person> myPeople = new List<Person>();
public PeopleCollection() { }
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// Iterate over the collection.
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Console.WriteLine(p);
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Servlet : how to implement isclientconnected

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