Design and Architecture

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Re: A basic object diagram? stavinski4-Oct-07 2:58 stavinski 4-Oct-07 2:58  Hi Wauna, I was thinking something like this Class Diagram[^] Re: A basic object diagram? Wauna4-Oct-07 3:36 Wauna 4-Oct-07 3:36  Ahhh.. the Gateway is the interface, not the Window. That makes more sense. So SQLServerWindowGateway would contain the Stored Proc calls. An instance of iWindowGateway would reside in the Window object. Then I suppose some parameter would need to be set to determine which Gateway to use (SQL vs Memory). I think I'm seeing the idea....Clever! We will have abstracted the Data reading and writing away from the core objects. The extra layer provides the flexibility to modify the db without interfering with the core objects. It makes sense. Thanks Steve! Re: A basic object diagram? stavinski4-Oct-07 3:43 stavinski 4-Oct-07 3:43  You got it! Re: A basic object diagram? Russell Jones5-Oct-07 3:05 Russell Jones 5-Oct-07 3:05  also the abstraction allows you to come up with new gateways. let's say you've got the window object on your machine in a SQL DB but you connect your laptop to head office. You can now pass the window SOAPServerWindowGatewayObject and the window is synchronized with Head Office. Equally that could be an IPartListPrintOutGateway etc I'm sure the potential list is almost limitless. Russ A doubt about 3 tire architecture. thomas_joyee30-Sep-07 19:37 thomas_joyee 30-Sep-07 19:37  My boss told me to design a 3 tire architecture application. I am using C# asp.NET 2005. Since I don't have much idea about the 3 tire architecture, I designed one based on articles found in net. I don't know how much perfect it is. So I like to hear your opinion. I designed it like this. I created a class library project for data layer named 'DL'. It contains 2 classes. First one is 'DLCommon', which is to declare protected variables of SqlConnection, SqlCommand, SqlDataAdapter est. Its constructor will read and store the connection string in a variable from the config file. The second class is 'DL', which drived the 'DLCommon' class. This class contains the functions to open database, excute sql and stored procedure. Its constructor will open the connection and store in a SqlConnection variable until the object is destroyed. I created another class library for business layer named 'BL'. This project has several classes. Each class is used to write functions for a particular set of operations. For example I created a class in 'BL' named 'clsUser', which is to write functions for add, edit, and delete the users. These class using a variable of 'DL' class for database operations. The presentation layer is a web project which using the variables of the classes in the business layer project. Thomas Re: A doubt about 3 tire architecture. Magnus Salgo1-Oct-07 20:18 Magnus Salgo 1-Oct-07 20:18  Sounds ok Normally you have a 3 tire Architecture to isolate things from each other UI - User Interface BL - Business lauer where you have all your business logic DAL - Data access layer where the database acces is in IO recommend you to also have a look on O/R mappers and specially Castle where you in your BL add some properties to your code and the O/R mapper is taking care of the mapping to the database Getting started article http://www.castleproject.org/activerecord/gettingstarted/index.html Magnus Sälgö Sälgö Consulting AB, Sweden Re: A doubt about 3 tire architecture. Brady Kelly3-Oct-07 2:43 Brady Kelly 3-Oct-07 2:43  Your concept looks OK, but if your are really going to name classes DL and BL you are looking for trouble. I do not believe they are right who say that the defects of famous men should be ignored. I think it is better that we should know them. Then, though we are conscious of having faults as glaring as theirs, we can believe that that is no hindrance to our achieving also something of their virtues. - W. Somerset Maugham My New Blog Advance My Design Skills to the next level Wauna30-Sep-07 4:27 Wauna 30-Sep-07 4:27  Hi Everyone, This is my first post on this board. I've been reading it for over a year now trying to soak up any information I can get. MY QUESTION: I need to learn better design skills, but I am a lone coder. Unfortunately, I work by myself so I don't have anyone to bounce ideas off or learn from. How can I take my design skills to the next level? What are your suggestions? MY BACKGROUND: Unfortunately, I have been programing for a career for over 10 years. I started with Basic on the Apple when I was a kid. I then began my career with VB, and have since moved onto VB.NET. I became MCSD certified in with Visual Studio 6. I have taken the MS classes on .NET, and have read a few books, but I don't feel like I've got the necessary knowledge to design good systems. I mean, my systems work, but I'm afraid if someone looked at them they'd say, "What the heck were you thinking?!?". I started to read a book on OO Design, that was based on the Martin Fowler book, but it used Bears, Zoo animals, and flowers as the examples. I didn't find the application of these to be to clear. Most of the time, it doesn't seem like my systems call for complex patterns, but without outside eyes how do I know? So is the answer reading the right book? Or is it seeking out skilled people to teach me? Any advice would be greatly appreciated! Regards, Wauna Re: Advance My Design Skills to the next level Pete O'Hanlon30-Sep-07 23:42 Pete O'Hanlon 30-Sep-07 23:42  As you are on your own, I would advise you to pick a reasonably complex problem that has a database, business logic and possibly multiple front-end options. Then, break down your code into the various areas, e.g. data access at the database end. At this point, you should have a reasonable idea about what you expect your system to be composed of, so you could use TDD (Test Driven Development) to take a crack at developing your system. Normally, I would expect you to do a lot more design up front, but as this is for your benefit only and as a way to experiment with what works for you, you can get to the coding a bit earlier than you would in a real project. Think about what patterns are present in your project, and how you can layer your code for best effect. Then - ask questions here on CP. Deja View - the feeling that you've seen this post before. Re: Advance My Design Skills to the next level Spithas30-Sep-07 23:42 Spithas 30-Sep-07 23:42  A good start is to read the HeadFirst Design Pattern & Head First Object-Oriented Analysis & Design.Check those out at http://www.headfirstlabs.com/books.php.Contact me any time at stzo_2@msn.com Re: Advance My Design Skills to the next level User 17164921-Oct-07 4:37 User 1716492 1-Oct-07 4:37  These people have a number of resources you will find helpful. To access some of them, you will need to register with them. http://www.netobjectives.com/[^] modified 1-Aug-19 21:02pm. Re: Advance My Design Skills to the next level Magnus Salgo1-Oct-07 20:26 Magnus Salgo 1-Oct-07 20:26  Another good book about patterns is http://www.oreilly.com/catalog/hfdesignpat/ and also Jimmy Nilsson book where he is beeing like a pair programmer to you http://weblogs.asp.net/fbouma/archive/2006/06/26/Applying-Domain_2D00_Driven-Design-and-Patterns-by-Jimmy-Nilsson.aspx Magnus Sälgö Sälgö Consulting AB, Sweden Re: Advance My Design Skills to the next level Wauna4-Oct-07 3:39 Wauna 4-Oct-07 3:39  Hi Everyone, Thank you for all of your responses. It looks like there are lots of books and resources that would be good to review. I'm also going to try posting some of the basics here. Thanks again! Wauna Re: Advance My Design Skills to the next level ekynox5-Oct-07 1:00 ekynox 5-Oct-07 1:00  You want to look at some code of how design patterns etc are applied. MSDN has some really cool sample applications. These applications are full n-tier design and gets stuck right into new concepts like software factories as well as best practices Try the Microsoft .NET PetShop 4.0 http://msdn2.microsoft.com/en-us/library/Aa479070.aspx Request for help on architecture franz.huber27-Sep-07 23:15 franz.huber 27-Sep-07 23:15  Hi all, I've got the following sceanrio for a customers project: - Application running as a service an a server. - Database running on a different server. - Lot's of messurement equipment connected to the server. - Administration-Tool, running on (some?) client's - Web-Browser-Interface to get information about the facilities state I'll to use remoting for communication between Admin-Tool and the Service. But I wonder how I can get data from the service to the admin-tool. The problem is that creating a WebService via RemotingConfiguration.Configure(...); with configuration wellknown mode = "Singleton" type = "RezeptServiceManager.RezeptServiceManager, RezeptServiceManager" objectUri ="CoreManager.soap" this leads (as desired) to a single server-object of type RezeptServiceManager, but these object does not have any connection to the service doing the actual work, therefore dataexchange is not possible. Accessing the Database from my RemoteObject is no option. Is it possible to get the Object connected to the service and therefore access the data? Does anybody can give me hint to solve this problem? thanx in advance Franz Re: Request for help on architecture led mike28-Sep-07 4:50 led mike 28-Sep-07 4:50  franz.huber wrote: Accessing the Database from my RemoteObject is no option. Why? franz.huber wrote: Is it possible to get the Object connected to the service I don't understand, I thought you said the remote object "is" hosted in the service? Re: Request for help on architecture franz.huber30-Sep-07 22:50 franz.huber 30-Sep-07 22:50  Yeah, the customer tends to be a bit paranoid - so he dislikes the idea of access his production-database from the net. Therefore I need a way to exchange data with the service. thanx Franz Re: Request for help on architecture led mike1-Oct-07 4:17 led mike 1-Oct-07 4:17  The remote object is hosted on a server therefore the database access is coming from that server not from the proxy object in the client. Re: Request for help on architecture Daniel.Li29-Sep-07 21:39 Daniel.Li 29-Sep-07 21:39  quoted... - Application running as a service an a server. - Database running on a different server. - Lot's of messurement equipment connected to the server. - Administration-Tool, running on (some?) client's - Web-Browser-Interface to get information about the facilities state It seems that you are running an application on a test computer, and then send information of equipments, connected with the comuputer, to a server. And you wanna use another client computer to access the status of equipments on server database. Am I right? just like we send blogs to a web server, and others can view the blog though internet. Help with class Diagram methods falles0127-Sep-07 18:46 falles01 27-Sep-07 18:46  HI, I am wondering what to include for the method part of a class diagram. I have already created my program and I'm going back to this to correct it. I know you usually have get and set methods but my TL told me to include what ever my code says, but I use sql statements to get the data and then display them using table adapters using .FILL.Can anyone help me out? ;) Sianny aka Sharny Re: Help with class Diagram methods led mike28-Sep-07 5:23 led mike 28-Sep-07 5:23  falles01 wrote: I know you usually have get and set methods Really? I do? I don't think so.[^] Multi Layered Architecture gus_br27-Sep-07 3:42 gus_br 27-Sep-07 3:42  Hi everyone! I'm looking for some informations about the multi tier/layer architecture for a web project (AJAX + tons of javascript) but also with a lot of C# code for the web portal's objects parts. I've found some informations (even some in CP) but I think I need more and go deeper, especially, something that contains examples. Could someone help me? Thanks in advance! :] See you... Re: Multi Layered Architecture ekynox29-Sep-07 12:42 ekynox 29-Sep-07 12:42  well if you want examples then try these Microsoft .NET PetShop 4.0 http://msdn2.microsoft.com/en-us/library/aa479071.aspx[^] Stock Trader http://msdn2.microsoft.com/en-us/netframework/bb499684.aspx[^] Dinner Go .NET http://dinnernow.net/default.aspx?tabindex=0&tabid=1[^] All of these applications mentioned above use design patterns to implement n-tier style architecture. Hope this helps. Both the Stock Trader and Dinner Go sample applications are based on .NET framework 3.5. Re: How to design the system Pete O'Hanlon25-Sep-07 22:10 Pete O'Hanlon 25-Sep-07 22:10  Please don't cross post. Deja View - the feeling that you've seen this post before. New feature for building access control Justin Perez21-Sep-07 8:32 Justin Perez 21-Sep-07 8:32  At my place of employment we have access cards as a system for entering the building. We have a utility that shows who is in the building, and who is out. This utility gets the in and out employees from a SQL Database. My supervisor wants a new feature added, and I have been giving the task of doing the design work for this. I have been mulling around for a few hours, considering my options. I was wondering what the CPians think of this idea, or if you guys have a better idea. The new feature would allow you to select an employee from the "Out of the building list," and set a notification on the person. So, when they enter the building, you will recieve an E-Mail saying "Joe Shmoe entered the building at 5:00 PM." We want this added to enterprise namespace so this can be a re-usable object in any software we design. So, my Idea is as such: I would create a service running on one of the servers in the building. The user will look at the In&Out utility, select a user, and say "Hey I wanna be notified when they come in" The service will accept notification request, and store it in a database. The service will constantly monitor the In&Out database, and when a condition for one of the notification requests has been met, it will send an E-Mail to the requestor. Then, the service will remove the notification request from the list. I have been looking at This Article[^] and I believe a lot of this is applicable to me. What do you guys think? I get all the news I need from the weather report - Paul Simon (from "The Only Living Boy in New York")

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