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  • Open Source - EER Modeling Tool

    - by Nick Fergis
    Is there a good open source or reasonably priced EER modeling tool for MySQL besides MySQL Workbench? I find the MySQL Workbench interface to be clunky. I would like to be able to manage my production schema beginning all design changes in the EER and propogating those out to my schema for created and altered tables. Is anyone use a tool they love to manage their environments in this way? Thanks. - Nick

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  • Authenticating users in iPhone app

    - by Myron
    I'm developing an HTTP api for our web application. Initially, the primary consumer of the API will be an iPhone app we're developing, but I'm designing this with future uses in mind (such as mobile apps for other platforms). I'm trying to decide on the best way to authenticate users so they can access their accounts from the iPhone. I've got a design that I think works well, but I'm no security expert, so I figured it would be good to ask for feedback here. The design of the user authentication has 3 primary goals: Good user experience: We want to allow users to enter their credentials once, and remain logged in indefinitely, until they explicitly log out. I would have considered OAuth if not for the fact that the experience from an iPhone app is pretty awful, from what I've heard (i.e. it launches the login form in Safari, then tells the user to return to the app when authentication succeeds). No need to store the user creds with the app: I always hate the idea of having the user's password stored in either plain text or symmetrically encrypted anywhere, so I don't want the app to have to store the password to pass it to the API for future API requests. Security: We definitely don't need the intense security of a banking app, but I'd obviously like this to be secure. Overall, the API is REST-inspired (i.e. treating URLs as resources, and using the HTTP methods and status codes semantically). Each request to the API must include two custom HTTP headers: an API Key (unique to each client app) and a unique device ID. The API requires all requests to be made using HTTPS, so that the headers and body are encrypted. My plan is to have an api_sessions table in my database. It has a unique constraint on the API key and unique device ID (so that a device may only be logged into a single user account through a given app) as well as a foreign key to the users table. The API will have a login endpoint, which receives the username/password and, if they match an account, logs the user in, creating an api_sessions record for the given API key and device id. Future API requests will look up the api_session using the API key and device id, and, if a record is found, treat the request as being logged in under the user account referenced by the api_session record. There will also be a logout API endpoint, which deletes the record from the api_sessions table. Does anyone see any obvious security holes in this?

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  • Threads in C# [Question]

    - by blez
    Thread1/2: do TotalThreads-- on their exit int TotalThreads = 2; void AsyncFunc() { // run thread for Func() } void Func() { // run Thread1 // run Thread2 while(TotalThreads > 0) { /* do nothing */ } // some code } is that bad design?

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  • Can I get a WPF ListBox to inherit brushes from parent element?

    - by Jay
    My WPF window has its foreground brush set to a brush from a resource dictionary, and I want all text in the window to have this color, so I don't touch the foreground brush in anything else. Textboxes get the color Textblocks get the color Buttons get the color Listboxes do not get the color, and so neither do their contents. Is there any way to get a Listbox to behave like the other controls in this respect? Assuming not, and that this is by design, what is the rationale?

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  • By knowing VC++ MFC, how difficult is to learn C#.Net?

    - by AKN
    Right now, I'm more into design & maintenance of MFC based application. I'm seeing good progress and requirement for C#.Net application. With this background knowledge, how easy or difficult is to learn C#.Net? Is there any tutorials available online that helps MFC developers to easily learn C#.Net quickly? Any help on this much appreciated!

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  • Is there a tool to generate MVC code in C#?

    - by Rity
    I was working on a project with a colleague and went out for lunch one day. Given that we only spent a few days doing design and no coding, I was surprised to find out that after lunch, he had over 40 files completed (various classes, interfaces, DTOs, etc). He told me he is just a fast typist but I need to know the real deal. He hasn't been able to sustain that kind of productivity just the initial skeletal code but still, any ideas how he did this?

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  • what if i keep my class members are public?

    - by anish
    In c++ instance variables are private by default,in Python variables are public by default i have two questions regarding the same:- 1: why Python have all the members are public by default? 2: People say you should your member data should be private what if i make my data to be public? what are the disadvantages of this approch? why it is a bad design?

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  • HTML5 vs Flash ... Resources

    - by Barbara
    I'm a novice ...in that i've taken a few courses n poured through bunches of cool flash widgets, components and techniques. now it's time for my own website ... I do graphic design n really want to use some of the ready mades for convenience and economy...r there similar non flash products?

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  • Crystal Report displaying Group Header multiple times

    - by Ravi Gupta
    Hi I am using Crystal Reports 10 to generate my reports. In one of the reports I see that a group header is getting repeated 2 times in the output document while in the design tab I can that it is present only one time. I am having my query as a "Union All" of 2 data sets. Please advise what could be the cause. Thanks.

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  • Help me choose between XML or SQL Lite on android

    - by Ngetha
    I have an android app that periodically, say once a week downloads content from a server in XML. The content is used by the app, different Acitivities use different parts of the content. My question is a design one, should I save the data in SQlite or just keep it as an XML file, which one would be faster to read? The app can only use one content piece at a time, which means subsequent XML content downloads replace the old one.

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  • Instantiating Java object with a passed in method

    - by superluminary
    It's been a few years since I've been heavily into Java. Coming back to it I'm seeing this pattern all over the place: ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() { public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) { // do work } }); This looks more like Functional programming to me. It's a nice pattern but how is it possible to pass a method like this? In the old days a class was a class, and once compiled there was little you could do to it. My questions are: Can anyone let me know what this pattern is called? How can I write a class that can be instantiated in this way. Are there any other useful examples of functional patterns that have made their way into Java? What do I need to Google to read more about this? Thanks.

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  • solutions for rapid front-end development?

    - by fayer
    im using mvc framework and i have learned some techniques that help me with different parts of RAD. models: doctrine/visual paradigm controllers/libraries: various design patterns now i only need to know what technique/solution i should use for the views so that i can create views more rapidly. cause i don't think it's efficient to code css/html manually, even though i understand it. its the same principle when using visual paradigm to create both my mysql database tables and doctrine model classes. i believe in using right tools will boost up development speed. so what could i use for the views to save time and energy and don't reinvent the wheel all the time? dreamweaver? any css generation tools? 960/blueprint for layout? suggestions? thanks

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  • iPhone settings screen

    - by malleswar
    Hi Friends, I want to design a screen like settings screen. Like in grouped uitableview I want to place the controls. Can any one please provide me any application sample or code ? Thanks in advance. Regards, Malleswar

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  • Lookups in Multi-Tenant Database

    - by Huthaifa Afanah
    I am developing a SaaS application and I am looking for the best way to design lookup tables, taking in consideration: The look-up tables will have predefined data shared among all the tenants Each tenant must have the ability to extend the look-up table with his own data e.g adding a car class not defined I am thinking about adding TenantID column to each lookup and add the predefined data with setting that column to some value which represents the "Super Tenant" that belongs to the system itself

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  • Uploading files to a server that has Real Time Antivirus scan running

    - by zecougar
    I need to allow users to upload files onto a server that has an antivirus program running with real-time scanning switched on. What would be a good design to ensure that infected files are not uploaded to the server. Questions - would large files be copied onto disk and then immediately scanned, or would they be scanned as they are copied and not allowed to appear on disk if infected Should i build a seperate infrastructure around this to specifically ionvoke a scan on the copied file ? this might be an issue if the file is deleted through the real-time scan

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  • Populating data in multiple cascading dropdown boxes in Access 2007

    - by miCRoSCoPiC_eaRthLinG
    Hello all, I've been assigned the task to design a temporary customer tracking system in MS Access 2007 (sheeeesh!). The tables and relationships have all been setup successfully. But I'm running into a minor problem while trying to design the data entry form for one table... Here's a bit of explanation first. The screen contains 3 dropdown boxes (apart from other fields). 1st dropdown The first dropdown (cboMarket) represents the Market lets users select between 2 options: Domestic International Since the first dropdown contains only 2 items I didn't bother making a table for it. I added them as pre-defined list items. 2nd dropdown Once the user makes a selection in this one, the second dropdown (cboLeadCategory) loads up a list of Lead Categories, namely, Fairs & Exhibitions, Agents, Press Ads, Online Ads etc. Different sets of lead categories are utilized for the 2 markets. Hence this box is dependent on the 1st one. Structure of the bound table, named Lead_Cateogries for the 2nd combo is: ID Autonumber Lead_Type TEXT <- actually a list that takes up Domestic or International Lead_Category_Name TEXT 3rd dropdown And based on the choice of category in the 2nd one, the third one (cboLeadSource) is supposed to display a pre-defined set of lead sources belonging to the particular category. Table is named Lead_Sources and the structure is: ID Autonumber Lead_Category NUMBER <- related to ID of Lead Categories table Lead_Source TEXT When I make the selection in the 1st dropdown, the AfterUpdate event of the combo is called, which instructs the 2nd dropdown to load contents: Private Sub cboMarket_AfterUpdate() Me![cboLead_Category].Requery End Sub The Row Source of the 2nd combo contains a query: SELECT Lead_Categories.ID, Lead_Categories.Lead_Category_Name FROM Lead_Categories WHERE Lead_Categories.Lead_Type=[cboMarket] ORDER BY Lead_Categories.Lead_Category_Name; The AfterUpdate event of 2nd combo is: Private Sub cboLeadCategory_AfterUpdate() Me![cboLeadSource].Requery End Sub The Row Source of 3rd combo contains: SELECT Leads_Sources.ID, Leads_Sources.Lead_Source FROM Leads_Sources WHERE [Lead_Sources].[Lead_Category]=[Lead_Categories].[ID] ORDER BY Leads_Sources.Lead_Source; Problem When I select Market type from cboMarket, the 2nd combo cboLeadCategory loads up the appropriate Categories without a hitch. But when I select a particular Category from it, instead of the 3rd combo loading the lead source names, a modal dialog is displayed asking me to Enter a Parameter. When I enter anything into this prompt (valid or invalid data), I get yet another prompt: Why is this happening? Why isn't the 3rd box loading the source names as desired. Can any one please shed some light on where I am going wrong? Thanks, m^e

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  • Guice child injector override binding

    - by Roman
    Hi All I am trying to to override a binding in a child injector that was already configured in a base injector. like that : public class PersistenceModule extends Abstract{ @Override protected void configure() { bind(IProductPersistenceHelper.class).to(ProductPersistenceHelper.class); } } then : Injector injector = Guice.createInjector(new PersistenceModule()); injector.createChildInjector(new AbstractModule(){ @Override protected void configure() { bind(IProductPersistenceHelper.class).to(MockProductPersistenceHelper.class); } }) Guice is complaining that it has already a binding for that. Are there any patterns or best practices for that problem ?

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  • Characters spilled over multiple columns in Oracle 11g?

    - by vicky21
    This is related to question: How to store unlimited characters in Oracle 11g? If maximum I need is 8000 characters, can I just add 3 more varchar2 columns so that I will have 4 columns with 2000 char each to get 8000 chars. So when the first column is full, values would be spilled over to the next column and so on. Will this design have any bad side effects? Please suggest.

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  • passing data to and from server using xml

    - by sapna
    i need to design a web site in which data is passed to and from the server using xml.i got it how to transform data from database to xml and then to html.but i am not able to find how to pass data from client to server using xml.webpages are designed using asp.is it possible to do pass data from client to server using xml.what are the things that are to be studied.help needed immediately.

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