I'm pretty new to my company (2 weeks) and we're starting a new platform for our system using .NET 3.5 Team Foundation from DotNetNuke. Our "architect" is suggesting we use one class project. Of course, I chime back with a "3-tier" architecture (Business, Data, Web class projects). Is there any disadvantages to using this architecture?...
I am in the middle of a "discussion" with a colleague about the best way to implement the data layer in a new application. One viewpoint is that the data layer should be aware of business objects (our own classes that represent an entity), and be able to work with that object natively. The opposing viewpoint is that the data layer sh...
I'm currently writing an ASP.Net app from the UI down. I'm implementing an MVP architecture because I'm sick of Winforms and wanted something that had a better separation of concerns. So with MVP, the Presenter handles events raised by the View. Here's some code that I have in place to deal with the creation of users: public class Crea...
Now that LINQ to SQL is a little more mature, I'd like to know of any techniques people are using to create an n-tiered solution using the technology, because it does not seem that obvious to me. ...
Assuming the you are implementing a user story that requires changes in all layers from UI (or service facade) to DB. In what direction do you move? From UI to Business Layer to Repository to DB? From DB to Repository to Business Layer to UI? It depends. (On what ?) ...
Hi there, In my just-completed project, I was working getting distributed transactions working. We implemented this using JBoss's Arjuna Transaction Manager, and Spring's declarative transaction boundaries. Our request sequence looked like: browser -> secured servlet -> 'wafer-thin' SLSB -> spring TX-aware proxy -> request-handler PO...
The project I'm working is using n-tier architecture. Our layers are as follows: Data Access Business Logic Business Entities Presentation The Business Logic calls down into the data access layer, and the Presentation layer calls down into the Business Logic layer, and the Business entities are referenced by all of them. Our busine...
Our customer would like to know who is online and currently using the custom application we wrote for them. I discussed it with them and this doesn't need to be exact, more of a guestimate will work. So my thought were maybe a 15 minute time interval to determine user activity. Some ideas I have for doing this are as follows: Stam...
I look around and see some great snippets of code for defining rules, validation, business objects (entities) and the like, but I have to admit to having never seen a great and well-written business layer in its entirety. I'm left knowing what I don't like, but not knowing what a great one is. Can anyone point out some good OO business...
Hi, We are designing a Payroll Generation System for a client. The organization we are targeting has a hierarchy as follows: Company -> Cluster -> Business Unit (BU) -> Department -> Employee The salary for an employee is made up of various salary components. Each salary component has 3 rules associated with it, a Calculation Rule (Ca...
Hi, We are designing a Payroll Generation System for a client. The organization we are targeting has a hierarchy as follows: Company -> Cluster -> Business Unit (BU) -> Department -> Employee The salary for an employee is made up of various salary components. Each salary component has 3 rules associated with it, a Calculation Rule (Ca...
I am a self taught vb6 programmer who uses DAO. Below is an example of a typical piece of code that I could churn out: Sub cmdMultiplier_Click() 'Button on form, user interface ' dim Rec1 as recordset dim strSQL as string strSQL = "select * from tblCustomers where ID = " & CurrentCustomerID 'inline SQL ' set rec1 = GlobalDat...
Edit: I am using SqlDataAdapters to fill the data sets. Sorry--I should have been more clear. I'm working on a project where I need to fill a number of strongly-typed data sets with information from stored procedures. Right now, I have a generic method in my data access layer: public static DataSet FillDataSet(DataSet dataSet, string s...
Hi all. Wondering if my approach is ok or could be improved: Public Class Company private _id as Integer private _name as String private _location as String Public Function LoadMultipleByLocation(Byval searchStr as String) as List(Of Company) 'sql etc here to build the list End Function End Classs Thoughts on having...
We have a website, where transactions are entered in and put through a workflow. We are going to follow the standard BLL(Business Logic Layer), DTO(Data Transfer Object), DAL(Data Access Layer) etc. for a tiered application. We have the need to separate everything out because some transactions will cross multiple applications with differ...
How do you manage development and deployment of a n-tier system that's made up of multiple websites, desktop applications, web services and databases that have a mix of dependencies? Assume that you have a continuous integration environment with source control and automated builds. ...
I've seen quite a few developer job postings recently that include a sentence that reads more or less like this: "Must have experience with N-Tier architecture", or "Must be able to develop N-Tier apps". This leads me to ask, what is N-Tier architecture? How does one gain experience with it? ...
I need to deploy a Delphi app in an environment that needs centralized data and file storage system (for document imaging) but has multiple branch offices with relatively poor inter connectivity. I believe a 3 tier database application is the best way to go so I can provide a rich desktop experience with relatively light-weight data tra...
We're embarking on a new middle tier service that will allow internal client systems to create and update and query records in some underlying data stores. The service will aggregate as many as 3 seperate underlying datastores. For the purposes of this question assume: Data store #1: Proprietary XML Database. Data store #2: Off the ...
Hi Guys, I have a n-tier winform client server application running against sqlserver DB. I want it to be able sometimes to run "offline" (not connected to the DB) and on reconnect, reconsile the changes to the main DB. Now, this i have tough architecture decision to make: should i use database replication or manage it myself using queues...