Is there other web site which talks about how to set the environment variable of J2EE for Linux?I followed this web site http://www.dougsparling.com/comp/howto/linux_java.htmlbut after allwhen I tired to compile a servlet program... it couldn't be complied. I think the case is that the compiler ...

I am using local interface to call entity bean from session bean where my business logic resides. Does anyone have an idea as to what will be the effect if I deploy this on a weblogic cluster.

Hi everyone,I have been seeing more examples of calling EJBS from tablibs lately.What advantage does calling EJBS from taglibs have over calling from a servlet?Thanks in advance

If I want to run a J2EE client in a remote machine, what is the minimum configuration I need to have besides installing jdk?Do I need to install j2ee on the machine as well? Or can I getaway with having the client .jar file only?

We are looking for a pattern that would help us with the caching of read-only related data.The type of relationship is 1toMany.For example, for each G/L accounts, I can have many activities and for each activities, I can have many location.Any ideas ?

Hi Firends, I got problem while running client application[Not Web Client].In J2EE 1.3 Tutorials, they mentioned <runclient> to run the client program.I would like to know what is it <runclient> is it a command or exe file? where is it?thank uSelvan ...

We are using Session Beans, Data Access Objects, and Value Objects in our application (no EBs). A majority of our database tables do not have timestamp columns and we are wondering how others handle stale value objects when timestamps aren't available. Is adding the timestamp column the best ...

Hi all,Here is my problem. I have an object, "MasterObj" for discussion sake, that I instantiate once at start-up, from a file contains a list of properties. The properties are used to set various fields in the MasterObj. During run time, other objects, "Callers", are going to have sessions ...

CAN SOMEONE PLEASE TELL ME HOW TO UPLOAD THE JAVA APPLICATIONS ONTO WEB SPACE CAUSE I DON'T UNDERSTAND .......DO YOU FTP OR ANOTHER WAY OF DOING IT..................

Hi guys,Under unix environement, I have jsdkee1.3 installed and using the deploytool I created the EJB application of the Converter example that is in J2EE tutorial.It worked when the client is on the same machine as the server. Then I took the ConverterAppClient.jar and the ...

I am designing an architecture using JSP/Servlets and Javabeans.Here's what I have:View: JSP only. Controller: ServletModel: Javabeans/Java classes.My question is should I use the Servlet to set up the Javabean and pass it to the JSP as a session object or an attribute of the request object? I ...

Could anyone summarize for me differences between Dispatcher View pattern and Service to Worker pattern? I do not understand them quite well...Thank you

Hi, I have been using the DAO J2EE design pattern for bulk data acces from the database avoiding entity beans,.. But what is happening is that I have factory which creates the instances of DAO's and that factory is used by a Session Facade, I do feel that I can get great benifits of ...

Can you give me a brief overview about singleton.What do you mean by 'a singleton object'/ 'Singleton pattern/Architesture' ? I am confused by the term. It would be helpful if someone can explain about the same.Thanks,

Hi,I want to store a hashtable of info with about five attributes (id, name, username, date) in a persistent state in JSP order to not always call the database. I am either going to use session or request objects.My question is if it's a good idea to store the hashtable with 2000 records just ...

hallo all,as i've read in some articles there are common way to represent database entity (a row in the table) by an entyty beans.but, what is an appropriate way to represent a set of rows ? for example - user's shopping cart. i don't like the common way - to implement shopping cart as ...

Hi Guys,i've started woking on EJB very recently , though i've worked on core java / jsp/servlets/beans & i want to imlpement Model II Architecture for that(ie Controller JSP included). Actually i want first html/jsp/servlet page sud call controller page & then the request sud be ...

Hi,Please could you give me an idea about how to make connection between J2EE and InterBase DB, I would like to know the JDBC Driver settings in J2EE default.config file for InterBase Database through InterClient.InterBase is connecting succesfully when using Jakarta-tomcat for JSP file but I ...

hi,i am designing an event-driven system,i hope to get some reference materials and source code of event notifier pattern.could anybody here give me some help?thank you in adavance!woo

HiCan any guide me , where to use Single Design pattern in Java Based ApplicationsShould i use Singleton Pattern in the following situations1)RMI Server 2)Controller Classes ( MVC) invoked by Servlet3)Database cashing /handling classesPlease suggest other suitable places alsoThanks in Advance ...

I have been trying to use the JMX agent and instrumentation RI from the SUN download site. However although I can get the BaseAgent.java program running, I am unable to view it through my browser. Could anyone please suggest what the problem could be. The BaseAgent program is pasted below :/* * ...

Hi!!How can I apply the singleton pattern in remote objects? Is it possible to control the instance existance by naming service? Where can I find some feature about this subject?ThanksSandra.

I deployed a WAP enabled application in Weblogic Server 6.0 in whch i used encodeURL method of the HTTPResponse servlet class which encodes the session ID into the hyper-links on the Web pages that your servlet sends back to the browser.For this we need to set ...

Does anyone have any recommendations in regards to a Web Application Architecture using Servlets, JSPs and other J2EE components (v1.2.1)? Books, Web sites, anything.I'm looking for some architecture suggestions/patterns for a large scale Web Application, as well as some concrete examples. All ...

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Hi allI need to pass the client reference in a java application(Not web app) to the bean,whether it is session, entity or message, and allow the bean to callback the client (by invoking the method located at the client side or another mean) when some event is happened. Is it possible? and how ...

Actually,i'm developing a system that incorporates apache+ssl+tomcat.Basically,i managed to developed have of the project with apache and tomcat.Unfortunately,i encounter some problem when it comes to getting ssl+apache+tomcat under win98.Do any of you have any experience in getting ssl work ...

Is there any other popular J2ee framework easy to use?

Hi,I am new to j2ee platform.I am working on a j2ee application with jsp as presentation layer. I am using struts as MVC pattern model. I am facing some puzzle while designing the application. Hope someone share their experience with me.When there is a one-to-many relation in the database ...

Hi,Take a look at he Aggregate Entity Design Pattern. http://developer.java.sun.com/developer/restricted/patterns/AggregateEntity.htmlIn one portion it states "According to the EJB 2.0 specification, a dependent object is defined as follows:............" This means the authors were quite ...

hii want to connect to sql server database through j2ee server 1.3.. - i have problem in finding the required driver - and how to configure the driver and how to connect to the data base using thisarvind

I read an article about an implemention of Pet Store inJ2EE and .NET.In the article they said that Sun discourage Stored Procedure usage in the Blue Prints & Patterns.I really can't belive it!!I participate in a development 2 years ago in which the movement of the logic from the client (in ...

Is it useful to use the J2EE Design Pattern with EJBs that have local Interfaces?Example:variant 1a entiy bean (with local interfaces) creates a value object with its attributes. Another ejb (with local interfaces) gets the value object with one method call.variant 2The client (in this case ...

I've been reading through the various different J2EE patterns and I haven't been able to find a generic pattern for storage of application resrouces.The EJB Environment has a lot of these already handled via JNDI, however on the servlet/client end of things, there isn't anything.The closest ...

Urgent!! Please help!!!Is it possible for a Session Bean which implements Session Facade pattern to call an Entity bean directly? Our Client insists that a True Session Bean (which does not implement Session Facade pattern) can only call an Entity Bean and not a Session Bean which implements ...

All,Ive implemented a classic DAO Factory. However, I want the DAOFactory to not require calling methods to indicate the type of factory to use, such as Oracle or MS SQL. I would like the DAOFactory to return a SQLFactory, OracleFactory, or XMLFactory based upon environmental setup. I also wish ...

Hi,I've a query regarding JSP design.Typically in J2EE applications JSPs get output data (to be shown in the html) from Request object itself (stored as an attribute). Sometimes for simplicity of the application one might need to access the output data from Sesssion object itself. Can anyone ...

Hi All,I've a problem. I need to store data which can be accessed by multiple sessions. I don't want to store the data in database. At the same time my requirement is that the design has to support application servers in clustured environment. Hence I cannot use any singletone class to store ...

Hi techies:I am facing a problem as how to send a JavaBean object to a EJB.Help me with some example code to rectify a error >>Error: Stateless Session Bean can have only 1 ejbCreate method with no parameters.This is the error when compiling and would request all to help me solve my ...

If you don't have SessionFacade pattern implementation,is it possible to have a Business Delegate talking to a Session BeanThanks in advance

Hi!I'm quite new to designing distributed software, and....Which patterns books would you recommend when designing J2EE apps... and generally java apps?Is Core's J2EE patterns really that good (sells well)?How about Applied java patterns (Core/Sun)?Should I consider acquiring The "GoF" ...

I came from Delphi Client Server and want to redevelopand scale up my app with Java and the useof a appserver. Where should i start?Where can i find nice help for doingin thingsthe ERP way?

sir,i want to know that what exactly is J2EE and where can i find related articles about it.thanks.

I am starting on a new project that is using the J2EE platform. This application is a database maintenance application mainly doing updates to database tables. I have a good understanding of the main concepts/patterns I want to incorporate but don't know how to actually go about implementing ...

Can i include a file.txt in war package and read it from servlet classes post deployment? I thow, but the jboss generate the error: file not found. What is the correct path specification?

Out of these two architectures which one is more performance oriented and why ?1. Requests will be first gone to FrontController Servlet where authorization and authentication is done and then request is passed to one another SERVLET which will do business validations by calling EJB and forward ...

hai,i am a newbie to J2EE Pattern. i would like to know some examples about the Page - by - Page Iterator pattern. my requirement is to display results 10 by 10 in each page to the client by JSP. i am having nearly 10,000 results to display. how can i use Page - by - Page iterator concept to ...

I am facing the following challenges in my application. i would appreciate if someone can point me to any design patterns that might be relevant to this scenario.A user logs-in to a website a session bean is created for the particular user, her particular settings and data are used to ...

I need to know Write and delete files through my web application running on J2EE server. I have to make changes in the file server.policy in the lib directory of the server.Please tell me what changes I have to make.There are Following lines in the server.policy// Additional properties needed ...

Hi All,Where can I get the detail notes on J2EE Design Patterns, part of SCWCD.Section 13 says..13.1 Given a scenario description with a list of issues, select the design pattern (Value Objects, MVC, Data Access Object, or Business Delegate) that would best solve those issues.13.2 Match design ...