Handling impatient users
Hi
I have a problem with java-servlets and I hope someone have a suggestion on how I should solve it.
It all concerns handling impatient users, or more specifically to stop them from performing new (or the same) request while the first request is still executing.
We are using JSP 1.1 together with the Struts-framework to develop a customer application and some of the usecases (implemented as Session EJB's) take a "very" long time to finish. (very long = longer than your average impatient users expects)
The user triggers another servlet-call in order to "make things happen faster" and as you all know this is where my problem starts.
I have written code that tells me if this specific user have any pending transactions. If the user already has started a transaction I want to ignore the second (and third, and fourth, and so on) call.
How do I do that? If I simply ignore the execution of either doGet or doPost, the user gets a blank html screen and when my first transaction completes it's execution the result has nowhere to go (BIG mess-up in the server console).
More simply: How do I chose to ignore a servlet-request and dont send any response what so ever to the users browser?
regards ... Jocke
- why do you suggest that I start the main-execution
in a new thread, and why should it (the thread) be
stored in the users Session object?if you might know, the doGet() (or better the service()) method runs as a thread. There are some reasons when this method gets terminated, one of it is if the serlvet runner detects that the client connection has been lost which could happen if the client send a new request (depends on if there are persistent HTTP Connections used). Second, it is not said that the serlvet runner detects that case if you don't write anything out to the client connection, but you can't be really sure that this does not happen. If it happens, the service() method would get aborted, no matter if it is still processing.
To avoid this, you could create your own thread an place it in the session object. Like this, the service() thread might get killed without killing the processings in your thread or your thread itself.
- how do I get my web server to stop executing the
second request? Even if I store the new Response
object and do nothing else in the doPost method, the
browser still receives a reply (a blank page)?This shouldn't happen if you right something out to the client. I guess the blank page is just displayed because the request runs through the service method and has nothing to write out to the client.
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Best Ways to Handle Multiple Users
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the problem is that I want to use a transaction that needs data (TO number) that I created already but I don't called a COMMIT, see following structure (simplified):
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Dim strTest As String = Me.CreateNavigator.SelectSingleNode("/pr:properties/p:properties/documentManagement/ns2:h2b59c4ae4144c01973b1d8571d217ad/pc:Terms/pc:TermInfo/pc:TermName", Me.NamespaceManager).InnerXml
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Thanks in advance. Carol.Never mind, I think I've got it figured out. When I do it this way, I get to the If Not...Nothing at the correct time. Thanks for sending me down the correct path, Scott. Carol.:
Dim
firstStr As
String =
String.Empty
Dim xNav
As XPathNavigator = MainDataSource.CreateNavigator()
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As XPathNavigator = xNav.SelectSingleNode("/pr:properties/p:properties/documentManagement/ns2:h2b59c4ae4144c01973b1d8571d217ad/pc:Terms/pc:TermInfo/pc:TermName",
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Not xFirst
Is
Nothing
Then
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Need to instance to be able to handle 30000 users.
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DATA: V_KURSF1 TYPE c LENGTH 10,
v_kursf2 type c LENGTH 10,
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v_thousand TYPE char1, "Thousands Notation
v_decimal TYPE char1. "Decimal Notation
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WHEN c_y.
v_decimal = c_comma.
v_thousand = c_blank.
ENDCASE.
ENDIF.
ENDIF.
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Re: How can I handle disconnected user in Forte ?
First of all, I would like to thanks for your time and help.
What I am trying to do is very simple. Our company has MS SQL server as
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connect on-line or off-line. Besides, they are running our forte application
with their database ( may be sysbase, access .. database ).
For those agents that are off-line, we would like to extract the data
periodically and update the database in our company. Sometime, we may need
to send data back to our agents.
I have follow your suggestion to read the persisent Q manager.
But I still don't know how to start. What is the pitfall to implement
persisent Q manager?
By the way, if I want to keep the data in synch. Is it simply to have
persisent Q manager running at background. Everytime database object
insert/modify the database, I make an object serialized and put into the Q
manager waiting for sending serialized object to my company?
Kelvin.
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>First of all, I would like to thanks for your time and help.
What I am trying to do is very simple. Our company has MS SQL server as
central database. It stores all data for our agents. Each agents either
connect on-line or off-line. Besides, they are running our forte application
with their database ( may be sysbase, access .. database ).
For those agents that are off-line, we would like to extract the data
periodically and update the database in our company. Sometime, we may need
to send data back to our agents.
I have follow your suggestion to read the persisent Q manager. But I still
don't know how to start. What is the pitfall to implement persisent Q
manager?
By the way, if I want to keep the data in synch. Is it simply to have
persisent Q manager running at background. Everytime database object
insert/modify the database, I make an object serialized and put into the Q
manager waiting for sending serialized object to my company?
Kelvin.
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/> -
How can I handle disconnected user in Forte ?
Hi Forte user,
we would like to develop an application in Forte which support
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there developing the similar application?
Should I synchronize the data with database function ( we have to support
different database such MS SQL ,Oracle ... access database ) or write an
application in Forte that can serialized the object itself ?
Any help welcome !
Kelvin
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/>First of all, I would like to thanks for your time and help.
What I am trying to do is very simple. Our company has MS SQL server as
central database. It stores all data for our agents. Each agents either
connect on-line or off-line. Besides, they are running our forte application
with their database ( may be sysbase, access .. database ).
For those agents that are off-line, we would like to extract the data
periodically and update the database in our company. Sometime, we may need
to send data back to our agents.
I have follow your suggestion to read the persisent Q manager. But I still
don't know how to start. What is the pitfall to implement persisent Q
manager?
By the way, if I want to keep the data in synch. Is it simply to have
persisent Q manager running at background. Everytime database object
insert/modify the database, I make an object serialized and put into the Q
manager waiting for sending serialized object to my company?
Kelvin.
To unsubscribe, email '[email protected]' with
'unsubscribe forte-users' as the body of the message.
Searchable thread archive <URL:http://pinehurst.sageit.com/listarchive/> -
Hi all,
I want to update the HUs with a user status. I have done the following steps.
1. Defined a status profile (OK02) with a status.
2. Configured the packaging material type (VHAR) with new status profile.
3. When I update the status via HUMO>Display/Change>Edit>Status>Set Status, I am getting following error.
"HU 23 has no user status"
Please help me to resolve this issue.
Thanks
GuruHi,
In the Status screen, set status icon is not activated. But in the Status detail screen, when i press F4 on status profile, i am able to see the created status profile.
Appreciate your help. -
A good utm to handle 1000+ users
Justin1250 wrote:Brandon Svec wrote:Justin1250 wrote:What about the ASA 5500X series?Maybe a 5525X or a 5545XI thought the OP said ease of use and management? ;)Haha true. I like the ASA just not their price tag.There is also the Meraki MX400 would be about that 1gbps mark. They are easy.Personally in the middle of switching everything over to Sophos. I have 3 of 8 units deployed and so far they have been great. However I don't have the main unit deployed.Still using an older ASA at my main location.Sophos does have an evaluation program. Something to keep in mind.I believe Meraki also has a trial program.I thought of suggesting MX400 too. It doesn't get much easier and cleaner then Meraki UI. They do have free trial program for almost all products, but MX400 and MX600 require special approval.
Well, when you're talking that many users usually you're going to want HA regardless of the solution you run.
I've run both Sophos/Astaro and Sonicwall in HA settings, and as much as I love Sophos/Astaro, if you're most comfortable with Sonicwall it's probably the way to go, especially if you're a Dell shop (single point of contact makes support/sales easier)
I've never noted a higher issue/failure rate with the ASGs vs. the NSA/TZ units, it's really a matter of luck of the draw, when you have a large sample size with anything you're going to find issues (and only having one or two units magnifies any experience)
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About Event Handling in user Defined Form (In Addon)
Hi Every One,
Can Anyone Give Me Notes On EventHandling in forms That are Disgened using Sdk UIAPI .Like Button event ,application event, menuevent... etc with saple code
Regards
SrinivasHi Sura,
Hope this helps. C# sample code.
// SAP MANAGE UI API 2005 SDK Sample
// File: CatchingEvents.cs
// Copyright (c) SAP MANAGE
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
// BEFORE STARTING:
// 1. Add reference to the "SAP Business One UI API"
// 2. Insert the development connection string to the "Command line argument"
// 1.
// a. Project->Add Reference...
// b. select the "SAP Business One UI API 2005" From the COM folder
// 2.
// a. Project->Properties...
// b. choose Configuration Properties folder (place the arrow on Debugging)
// c. place the following connection string in the 'Command line arguments' field
// 0030002C0030002C00530041005000420044005F00440061007400650076002C0050004C006F006D0056004900490056
using System;
using System.Windows.Forms;
class CatchingEvents {
// This parameter will use us to manipulate the
// SAP Business One Application
private SAPbouiCOM.Application SBO_Application;
private void SetApplication() {
// Use an SboGuiApi object to establish connection
// with the SAP Business One application and return an
// initialized appliction object
SAPbouiCOM.SboGuiApi SboGuiApi = null;
string sConnectionString = null;
SboGuiApi = new SAPbouiCOM.SboGuiApi();
// by following the steps specified above, the following
// statment should be suficient for either development or run mode
sConnectionString = System.Convert.ToString( Environment.GetCommandLineArgs().GetValue( 1 ) );
// connect to a running SBO Application
SboGuiApi.Connect( sConnectionString );
// get an initialized application object
SBO_Application = SboGuiApi.GetApplication( -1 );
public CatchingEvents() {
// set SBO_Application with an initialized application object
SetApplication();
// events handled by SBO_Application_AppEvent
SBO_Application.AppEvent += new SAPbouiCOM._IApplicationEvents_AppEventEventHandler( SBO_Application_AppEvent );
// events handled by SBO_Application_MenuEvent
SBO_Application.MenuEvent += new SAPbouiCOM._IApplicationEvents_MenuEventEventHandler( SBO_Application_MenuEvent );
// events handled by SBO_Application_ItemEvent
SBO_Application.ItemEvent += new SAPbouiCOM._IApplicationEvents_ItemEventEventHandler( SBO_Application_ItemEvent );
// events handled by SBO_Application_ProgressBarEvent
SBO_Application.ProgressBarEvent += new SAPbouiCOM._IApplicationEvents_ProgressBarEventEventHandler( SBO_Application_ProgressBarEvent );
// events handled by SBO_Application_StatusBarEvent
SBO_Application.StatusBarEvent += new SAPbouiCOM._IApplicationEvents_StatusBarEventEventHandler( SBO_Application_StatusBarEvent );
private void SBO_Application_AppEvent( SAPbouiCOM.BoAppEventTypes EventType ) {
// the following are the events sent by the application
// (Ignore aet_ServerTermination)
// in order to implement your own code upon each of the events
// place you code instead of the matching message box statement
switch ( EventType ) {
case SAPbouiCOM.BoAppEventTypes.aet_ShutDown:
SBO_Application.MessageBox( "A Shut Down Event has been caught" + Environment.NewLine + "Terminating Add On...", 1, "Ok", "", "" );
// Take care of terminating your AddOn application
System.Windows.Forms.Application.Exit();
break;
case SAPbouiCOM.BoAppEventTypes.aet_CompanyChanged:
SBO_Application.MessageBox( "A Company Change Event has been caught", 1, "Ok", "", "" );
// Check the new company name, if your add on was not meant for
// the new company terminate your AddOn
// If SBO_Application.Company.Name Is Not "Company1" then
// Close
// End If
break;
case SAPbouiCOM.BoAppEventTypes.aet_LanguageChanged:
SBO_Application.MessageBox( "A Languge Change Event has been caught", 1, "Ok", "", "" );
break;
private void SBO_Application_MenuEvent( ref SAPbouiCOM.MenuEvent pVal, out bool BubbleEvent ) {
// in order to activate your own forms instead of SAP Business One system forms
// process the menu event by your self
// change BubbleEvent to False so that SAP Business One won't process it
BubbleEvent = true;
if ( pVal.BeforeAction == true ) {
SBO_Application.SetStatusBarMessage( "Menu item: " + pVal.MenuUID + " sent an event BEFORE SAP Business One processes it.", SAPbouiCOM.BoMessageTime.bmt_Long, true );
// to stop SAP Business One from processing this event
// unmark the following statement
// BubbleEvent = False
else {
SBO_Application.SetStatusBarMessage( "Menu item: " + pVal.MenuUID + " sent an event AFTER SAP Business One processes it.", SAPbouiCOM.BoMessageTime.bmt_Long, true );
private void SBO_Application_ItemEvent( string FormUID, ref SAPbouiCOM.ItemEvent pVal, out bool BubbleEvent ) {
// BubbleEvent sets the behavior of SAP Business One.
// False means that the application will not continue processing this event.
BubbleEvent = true;
if ( pVal.FormType != 0 ) {
// the message box form type is 0
// I chose not to deal with events triggered by a message box
// every event will open a message box with the event
// name and the form UID how sent it
SAPbouiCOM.BoEventTypes EventEnum = 0;
EventEnum = pVal.EventType;
// To prevent an endless loop of MessageBoxes,
// we'll not notify et_FORM_ACTIVATE and et_FORM_LOAD events
if ( ( EventEnum != SAPbouiCOM.BoEventTypes.et_FORM_ACTIVATE ) & ( EventEnum != SAPbouiCOM.BoEventTypes.et_FORM_LOAD ) ) {
SBO_Application.MessageBox( "An " + EventEnum.ToString() + " has been sent by a form with the unique ID: " + FormUID, 1, "Ok", "", "" );
private void SBO_Application_ProgressBarEvent( ref SAPbouiCOM.ProgressBarEvent pVal, out bool BubbleEvent) {
SAPbouiCOM.BoProgressBarEventTypes EventEnum = 0;
EventEnum = pVal.EventType;
BubbleEvent = true;
SBO_Application.MessageBox( "The event " + EventEnum.ToString() + " has been sent", 1, "Ok", "", "" );
private void SBO_Application_StatusBarEvent( string Text, SAPbouiCOM.BoStatusBarMessageType MessageType ) {
SBO_Application.MessageBox( @"Status bar event with message: """ + Text + @""" has been sent", 1, "Ok", "", "" );
Regards,
Jay.
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