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  • How significant are JPA lazy loading performance benefits?

    - by Robert
    I understand that this is highly specific to the concrete application, but I'm just wondering what's the general opinion, or at least some personal experiences on the issue. I have an aversion towards the 'open session in view' pattern, so to avoid it, I'm thinking about simply fetching everything small eagerly, and using queries in the service layer to fetch larger stuff. Has anyone used this and regretted it? And is there maybe some elegant solution to lazy loading in the view layer that I'm not aware of?

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  • .Net Compact Framework Tips, Tricks, and Gotchas

    - by Mat Nadrofsky
    Hey everyone, We work extensively in the .Net Compact Framework and Windows Mobile. I've seen plenty of questions come up regarding specifics to development of ASP.Net apps or other .Net based desktop apps but nothing CF specific. Anyone else a mobile developer out there that can share some things to start doing, stop doing, and avoid doing when developing in the Compact Framework?

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  • Minimum Requirements for (open) Solaris?

    - by Electrons_Ahoy
    I'm thinking about knocking together a Solaris box at home to act as a combination server and learning exercise. What are the minimum hardware specs I can throw at it such that it'll be actually usable? I'd be cobbling the machine together from a stack of various x86 PC spares/leftovers. Does anyone have experience with Solaris at the lower end of the spectrum? The Sun site, for example, claims it'll run with as little as 255 megs of ram, but is it worth the exercise with less than a gig? Will my old Pentium II 450 cut the mustard? (I'm willing to throw a couple of bucks at pricewatch/mwave/newegg on this, but if I need to build a better rig than my main PC, I may not bother.)

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  • Library for parsing arguments GNU-style?

    - by Delan Azabani
    I've noticed the basic 'style' of most GNU core applications whereby arguments are: --longoption --longoption=value or --longoption value -abcdefg (multiple options) -iuwww-data (option i, u = www-data) They follow the above style. I want to avoid writing an argument parser if there's a library that does this using the above style. Is there one you know of?

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  • Smaller Chunks of Data

    - by Googler
    I am using a web service to fetch a large amount of data. While sending the request, i receive an error as: Error: ** Please request data in smaller chunks.** Is this a problem with the web services i am fetching the information or a normal rule for fetching the data through internet. May i know the cause of this problem and also how to send the data in smaller chunks to avoid this error.

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  • how to start with unmanaged vps?

    - by GaVrA
    Hello! I have a managed VPS, so whatever i need i can just ask my support, and they will do it for me. Now i plan to migrate to unmanaged VPS, so i need some guides, tips on how and where to start learning. I will have more specific questions once i start using it, but now i just need some general answers about this topic. Thanks. Update: Ok, i have decided to go for unmanaged VPS with cPanel. OS is CentOS-5. I contacted support only for some small(i think) things like creating new account in whm, some database importing, installing new software(rare)... What i will be using is apache, php, mysql. I think i will be able to cope with upgrading to new versions, so the thing that interests me the most is security i guess.

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  • JSP application scope objects in Java library

    - by FrontierPsycho
    I am working on a preexisting web application built with JSP, which uses an external Java library. I want to make some JavaBeans that were instantiated with jsp:useBean tags available to the Java code. What would be a good practice to do that? I suppose I can pass the objects in question to every function call that requires them, but I'd like to avoid that.

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  • How to use linked resource with eclipse CDT ?

    - by pejotr
    I found it very difficult to configure linked resource in Eclipse CDT. Folder "wspolne" is located somewhere in the system, I'd like to use .cpp .h files from it in my current project, but avoid copying it. From what i read about Linked Resources is a solution, but I can't build a projct :/ I followed instuctions described here with out any result: stackoverflow.com/questions/1907275/in-eclipse-cdt-shared-resource-folder-that-is-built-differently-for-the-project. What's wrong ? Image that shows problem: http://img260.imageshack.us/img260/1629/eclipsen.jpg

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  • Domain Controller Placement

    - by Matt
    I've been working through some Exchange training documentation (the official MS e-learning package) and all of the design scenarios allude to placing at least one DC from your forest root domain in every site. I'm not sure whether this just relates to Exchange, but I can think of a number of issues we experience in our forest that would be resolved by this. For example, a Microsoft support engineer has stated that EVERY client in a child domain (i.e. all workstations and member servers) need access to a forest root DC to check certificate/template permissions, even on a subordinate CA. I have attempted to locate documentation or guidelines from Microsoft on this, but have not been able to find anything. I found the Domain Controller Placement guide, but it's only a form - you would use it to document where you will place your DCs, but it doesn't give any guidance on where you should deploy them. Does anyone know where, or if, I can find any such documentation?

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  • How to copy/paste LARGE amounts of text in Windows

    - by Johnson
    I am not sure if this is more suited for Superuser or Stackoverflow, but here goes... A little bit of background: I'm learning SQL and was trying to make a very large table which I could use for optimization tests. Something generic with random values. I created a little Java program to do just that, and was able to put out a text file with 100,000 lines, each line being an SQL INSERT statement for a new random record. However, with anything much bigger than 100,000 lines, I had problems either opening/using the text file in any text editor, or copying/pasting the text to the windows clipboard and then into SQL Developer so I could execute it as a script. I'm probably overlooking something really obvious, or doing something really stupid. There has got to be a better way to do this, but I couldn't find anything through Google or Stackoverflow or Superuser. Thanks!

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  • how to dynamically break NHibernation cascade

    - by Joe Black
    The NHibernate cascade setting in the entity mapping is static. Is there anyway to dynamically disable the "cascade" setting in code to avoid expensive cascade operation in NHiberate during a bulky data transaction? We do not want to use stored procedures or native SQL because we need to have the entity changes captured by NHibernate (audit).

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  • get a set of files that have been modified after a certain date

    - by jcollum
    Does anyone have a handy powershell script that gets a set of files from TFS based on a modification date? I'd like to say "give me all the files in this folder (or subfolder) that were modified after X/Y/ZZZZ" and dump those files to a folder other than the folder they would normally go to. I know enough powershell to hack about and get this done, eventually, but I'm hoping to avoid that.

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  • two identical broadband lines working as one

    - by Katafalkas
    I have been trying to find an answer to this, but all I get is hobbyists trying to connect they linksys's and get some magic out of it. So I am thinking of a way I could combine two 100Mbp Fiber Optics lines into a single connection for our office. I assume it involves some CISCO learning or something like this. Was thinking that I might need to configure some big router to load-balance the NAT'ing in some way. I assume that meny of you have done something similar and maybe someone could share the knowledge or at least provide some tips ?

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  • Regular Expression - Match only 7 chars?

    - by Simon
    I'm trying to match a SEDOL (exactly 7 chars: 6 alpha-numeric chars followed by 1 numeric char) My regex ([A-Z 0-9]{6})[0-9]{1} matches correctly but strings greater than 7 chars that begin with a valid match also match (if you see what I mean :)). For example: B3KMJP4 matches correctly but so does: B3KMJP4x which shouldn't match. Can anyone show me how to avoid this?

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  • OleDB Jet - Float issues in reading excel data

    - by Patrick
    When I read a sheet into a DataTable using the OleDbDataReader, floating point numbers loose their precision. I tried forcing OleDb to read the excel data as string, but although the data is now contained in a DataRow with each Column defined as System.String it looses precision (18.125 - 18.124962832). Any idea how to avoid this behaviour?

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  • MongoDB: What's the point of using MapReduce without parallelism?

    - by netvope
    Quoting http://www.mongodb.org/display/DOCS/MapReduce#MapReduce-Parallelism As of right now, MapReduce jobs on a single mongod process are single threaded Without parallelism, what are the benefits of MapReduce compared to simpler or more traditional methods for queries and data aggregation? To avoid confusion: the question is NOT "what are the benefits of document-oriented DB over traditional relational DB"

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  • make field a dropdown in access 2007

    - by Crash893
    I'm creating a HR database in access 2007 I have a main table of employee info and several tables that relate to that table ( education for example) that list the acceptable elements that can populate that cell in that row When i create a form it was created as just a plain text field which is constrained but I wanted to create a dropdown that had just the data that they are allowed to enter to avoid confusion.

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  • Avoiding SQL Injection in SQL query with Like Operator using parameters?

    - by MikeJ
    Taking over some code from my predecessor and I found a query that uses the Like operator: SELECT * FROM suppliers WHERE supplier_name like '%'+name+%'; Trying to avoid SQL Injection problem and parameterize this but I am not quite sure how this would be accomplished. Any suggestions ? note, I need a solution for classic ADO.NET - I don't really have the go-ahead to switch this code over to something like LINQ.

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  • Recurring payment, receiving transaction_id

    - by Dmitry Velesnitsky
    What is the data paypal returns if we make recurring payments through a Subscription button on the website? How can we get transaction_id? It's that we want our users to pay with credit cards with no need to register, but so far we can't get transaction_id to get the information for automatic processes on the website directly. Instead we have to manage it all through paypal account. How can we avoid it?

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  • Looking at desktop virtualization, but some users need 3D support. Is HP Remote Graphics a viable solution?

    - by Ryan Thompson
    My company is looking at desktop virtualization, and are planning to move all of the desktop compute resources into the server room or data center, and provide users with thin clients for access. In most cases, a simple VNC or Remote Desktop solution is adequate, but some users are running visualizations that require 3D capability--something that VNC and Remote Desktop cannot support. Rather than making an exception and providing desktop machines for these users, complicating out rollout and future operations, we are considering adding servers with GPUs, and using HP's Remote Graphics to provide access from the thin client. The demo version appears to work acceptably, but there is a bit of a learning curve, it's not clear how well it would work for multiple simultaneous sessions, and it's not clear if it would be a good solution to apply to non-3D sessions. If possible, as with the hardware, we want to deploy a single software solution instead of a mishmash. If anyone has had experience managing a large installation of HP Remote Graphics, I would appreciate any feedback you can provide.

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  • Object of type "X" cannot be converted to object of type "X"

    - by Benjol
    (Can't believe this hasn't already been asked, but I can't find a dup) In Visual Studio with lots of projects, when I first open the solution, I sometimes get the warning Object of type "X" cannot be converted to object of type "X". Generally rebuilding seems to make it go away, but does anyone know what this is caused by, and how to avoid it? UPDATE I read somewhere that deleting all your resx files and rebuilding can help. I unthinkingly tried this. Not a good idea...

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