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• Domain Model and Querying

  - by Tyrsius

  I am new to DDD, having worked only in Transaction-Script apps with an anemic model, or just Big Balls of Mud, so please forgive any terminology I abuse. I am trying to understand the proper separation between the domain model and the repository. What is the proper way to construct a domain object that is coming from a database, assuming the (incredibly simplified) need to query for objects by status (returns enumerable), or by ID. Should a factory be building the objects, exposing methods for GetByStatus() and GetByID(), using a DIed repository? Should a repository be called directly, knowing how to build a domain model from the DTO? Should the domain model have a constructor for get by ID, using a DIed repoistory to load the initial state, using some other (?) method for the list? I am not really sure what the best way would be, and this question has an answer advocating each one (these are certainly mutuallu exclusive).

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• How secure is KeePassX?

  - by Uli

  I have hundreds of passwords, since I use a different random one for each website/service. They are all generated & stored with KeePassX, which can be synced to different computers and my android phone via dropbox (or ubuntuone). I know the database of KeePassX is secure (at least with a good passphrase). But what about when I am copying the password into the clipboard (where it is stored for 5 seconds)? Can any program running in user-space access the clipboard and store the password? If so, how big of a security risk is this?

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• How should I define my Java Objects?

  - by HonorGod

  I have a data grid where I sort of show the following information - All Guests Total Adults = 22 Total Children = 27 Confirmed Total Adults = 9 Total Children = 13 Country = Germany Total Adults = 5 Total Childres = 6 Friends Adults = 2 Children = 2 Relatives Adults = 3 Children = 4 Country = USA Total Adults = 4 Total Childres = 7 Friends Adults = 2 Children = 5 Relatives Adults = 2 Children = 2 Tentative Total Adults = 13 Total Children - 14 Country = Australia Total Adults = 7 Total Childres = 8 Friends Adults = 2 Children = 3 Relatives Adults = 5 Children = 5 Country = China Total Adults = 6 Total Childres = 6 Friends Adults = 2 Children = 4 Relatives Adults = 4 Children = 2 And in the database what I have is data at the lowest level which is Friends / Relatives and the corresponding countries set as a look-up value which in indirectly connected to another look-up that can tell me if they fall under confirmed or tentative. I guess my question is how do I layout my Java Object and perform the aggregations and give it back to the client. I am not sure if I am clear with my question, but feel free to comment so I can update the question accordingly.

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• How can I design multi-threaded application for larger user base

  - by rokonoid

  Here's my scenario, I need to develop a scalable application. My user base may be over 100K, every user has 10 or more small tasks. Tasks check every minute with a third party application through web services, retrieving data which is written in the database, then the data is forwarded to it's original destination. So here's the processing of a small task: while(true){ Boolean isNewInformationAvailable = checkWhetherInformationIsAvailableOrNot(); If(isNewInformationAvailable ==true){ fetchTheData(); writeToDatabase(); findTheDestination(); deliverTheData(); isAvailable =false; } } As the application is large, how should I approach designing this? I'm going to use Java to write it. Should I use concurrency, and how would you manage the concurrency?

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• Partner case - ISE (Germany) - IDS brings light into Investment Controlling with Exadata

  - by Javier Puerta

  (Original post in German: IDS bringt mit Exadata Licht ins Investmentcontrolling) "The amount of data that IDS GmbH (Analysis and Reporting Services) has to cope with daily, is enormous: at the subsidiary of Allianz SE all the services are around Investment Controlling.The company needed an extensible data warehouse solution in which all the data could be merged together, harmonized and enriched. Finally IDS decided for Exadata to be as optimal solution, specifically the Oracle Exadata Database Machine. The implementation was carried out jointly with the Oracle Platinum Partner ISE, who took over the technical and advisory support part and will be IDS´ preffered consultant in any further Exadata development. See how Exadata is used and why this investment has paid off for IDS, by watching watching the following video (in German)"

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• Track updated/inserted entities in LINQ to SQL applications

  - by nikolaosk

  In this post I would like to discuss in further detail the issue of track changing of entities in LINQ to SQL applications. I would like to show you how the DataContext object keeps track of all the items that are updated,deleted or inserted in the underlying data store. If you want to have a look at my other post about LINQ to SQL and transactions click here . I am going to demonstrate this with a hands on example. I assume that you have access to a version of SQL Server and Northwind database....(read more)

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• PowerShell script to find files that are consuming the most disk space

  As you know, SQL Server databases and backup files can take up a lot of disk space. When disk is running low and you need to troubleshoot disk space issues, the first thing to do is to find large files that are consuming disk space. In this article I will show you a PowerShell script that you can use to find large files on your disks. 12 essential tools for database professionalsThe SQL Developer Bundle contains 12 tools designed with the SQL Server developer and DBA in mind. Try it now.

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• Now's the Time to Register for Oracle OpenWorld Latin America 2012!

  - by Oracle OpenWorld Blog Team

  The recent Oracle OpenWorld conference held in San Francisco was a huge success. If you weren't able to attend, you'll be glad to know that key content and speakers from that conference will be featured in São Paulo on 4-6 December at Oracle OpenWorld Latin America 2012. Session tracks this year include: Applications, Business Intelligence, Database, Industries, Middleware, Oracle Services, and Servers and Storage Systems. At Oracle OpenWorld there's so much to see and do: keynotes, technical sessions, Oracle and partner demonstrations, hands-on labs, networking events, and more. Check the Website often as more details get added. And if you register between now and 15 November, you can save 35% off of the onsite price. We look forward to seeing you there!  (photo montage by Arun Gupta)

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• SSRS Reports as a Data Source in Excel 2013

  DBAs are expected to know how to administer the technologies that are available with and peripheral to SQL Server. To properly administer them, it certainly helps to understand the technology from the point of view of the user. By using an existing SSRS report as a data feed for Excel, Rodney Landrum explains how these users can now take advantage of development efforts in new ways. The seven tools in the SQL DBA Bundle support your core SQL Server database administration tasks.Make backups a breeze! Enjoy trouble-free troubleshooting! Make the most of monitoring! Download a free trial now.

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• Implement an FTP server (no threads) - how to start?

  - by ironicaldiction

  As a semester project, I have the following specification: Write a simple single threaded ftp server. The ftp server is configurable from a configuration file. The config allows to set the interface (where the server listens), the roots of the served content, transfer log, and database of users and its passwords. The server allows to create a virtual filesystem. By a virtual filesystem, we mean a mapping of a served directory to the real directory on the filesystem. For example, the client tree will look like: /home/user1 maps to /mnt/x/home/user1 /www maps to /var/cache/www /home/user_list.txt maps to /var/ftpclient/user_list.txt The user will see /home/user1 directory and /www directory and the file /home/user_list.txt The course is in C++. The projects to this point have provided a lot of structure, such as a class header file to get you started on the program. My question is this: how can I get started on what seems like quite a massive project (I have 3 weeks to return a working implementation)?

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• Is there an (open-source) ReST-based blogging/forum package out there?

  - by Malvolio

  The site I work on is almost entirely in Javascript, it just goes back (via Ajax) to the server for authentication, database access, things like that. My boss would like me to add blogging, forum, and commenting capabilities. I don't want to implement it from scratch and I certainly don't want to integrate some HTML-generating PHP atrocity. Ideal, I'm looking for a package that does all the backend work and offers ReST interface so I can write a Javascript-based UI that integrates nicely with the existing site. Does such a thing exist?

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• Which are the options available for PHP IDEs for windows

  - by dbz_a

  Hi, I am new to PHP (Have good j2EE and ASP .net experience) and now want to kick start developing a simple website (A database connection and simple inserts is the max technical stuff i plan right now). I have signed up at zymic for a free hosting (MySql included). Now please suggest me: the available IDEs for developing on PHP on windows OS and any beginner level resources that you have come across, for a .net/java guy which may help me to quickly figure out the differences would you advice me to go for frameworks like joomla etc as a beginner? or is it better i start exploring these after im familiar with PHP? Thanks in advance, Abhi

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• Getting started with SOAP [closed]

  - by EmmyS

  A site I developed has a new requirement to get weather data from the National Weather Service. They have quite a bit of info on how to use SOAP to get their data and display it in the browser, but what we need to do is use a cron job to get the data at specific intervals, then parse the data out into a database. I have no problem writing PHP code that will run an XSLt and parse xml records out into SQL queries, but I have no idea how to handle this with SOAP (which I've never worked with.) Do I get the data via a SOAP request, save it to an XML file on my web server, then run the XSLt against that? Or is there some other way to go about this?

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• How much will be difference between building php sites with SVN and not using it

  - by user1315279

  I have been developing PHP sites for about 5 years but never used SVN. But i am going to start in new company and they use SVN. Tomorrow is my first day. I want to know that how site developement differes with SVN. WITHOUT SVN I make test account on Linux server via cpanel I make database tables Put all files in /home/user/public_html and i use PHP designer as IDE to edit files and i can see the results on test.mydomain.com I just want to know how much will be the difference with SVN. I mean what will be the steps

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• Learning PHP MySQL [closed]

  - by Keith Groben

  I've been a designer for several year now. I'm now very interested in learning PHP, MySQL. I've read through W3Schools already and it helped me become familiar. I now want to know where I could go to start building some simple database and php applications so I could be come familiar with coding and start to improve. I think hands on application is the best way to learn. Since I'm a beginner, much of what I've found so far is sort of advanced to me.

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• Top Exastack ISV Headlines: Noetix

  - by Javier Puerta

  NoetixViews and Noetix Analytics run Oracle Exadata Database Machine to offer the speed, scalability, and consistency that their customers demand. Read more.                                         

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• Moving a LAMP set up from 32 bit to 64 bit

  - by user10157

  Hello everyone... I have setup an Ubuntu server 10.10 32bit on an old Dell D610 Laptop for testing. I have the latest PHP, MySQL and Apache with Wordpress installed. After the testing is over and once I finish adding material to my wordpress I will build a Ubuntu 10.10 64bit VM on Hyper-V. What I am wondering is , if it's best practice to build everything from scratch (which will take me more time and would like to avoid) or transfer the database and all other settings? If I choose to transfer how and what I need to do? Here's where I'd like some help as I am still an intermediate admin (If I can call it that!) I am looking forward for your help. Thanks!

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• Who created that user?

  - by AaronBertrand

  Twitter has provided some great fodder for blog content lately. And twice this week, I've found an excuse to take advantage of the default trace. Tonight @meltondba asked: I'm trying to find who created a user act in a DB It is true, SQL Server doesn't really keep track of who created objects, such as user accounts in a database. You can get some of this information from the default trace, though, since it tracks EventClass 109 (Audit Add DB User). If you run this code: USE [master] ; GO CREATE LOGIN...(read more)

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• Cannot upgrade system because of this error

  - by user292375

  Setting up mongodb-org-server (2.6.1) ... * Starting database mongod [fail] invoke-rc.d: initscript mongod, action "start" failed. dpkg: error processing mongodb-org-server (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already dpkg: dependency problems prevent configuration of mongodb-org: mongodb-org depends on mongodb-org-server; however: Package mongodb-org-server is not configured yet. dpkg: error processing mongodb-org (--configure): dependency problems - leaving unconfigured No apport report written because MaxReports is reached already Errors were encountered while processing: mongodb-org-server mongodb-org E: Sub-process /usr/bin/dpkg returned an error code (1)

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• Photo sharing social platform [closed]

  - by user1696497

  I am working on a photo sharing social platform like Flickr, Photobucket. To start off with I have half a million photos as of now. I want to convert all of these into a single format, compression ratio and use it as an original image. I will be storing original image, re-sized image according to layout and a thumbnail. I have started off with ruby, didn't find supporting libraries. I am considering python as it has a good image processing library and instagram is using it. I want some advise about how the image has to be processed while uploading, efficient way of storage whether database or a file system, image compressions, and precautions to be taken. I would be having profile pictures, do I need store them separately or along with the images? If I want to store the images on a file system, which file system should I use and also should I store the url or should I use any intermediate key value store like redis?

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• Modern website/webapp setup

  - by onepiece

  I'm new to web development. From looking at popular open-source frameworks for both front-end and back-end, I have a general idea of what the modern full-stack web setup looks like: Database <- Back-end language ~ REST API <- Front-end Notes: The back-end language (Python, Ruby, PHP, Java) generates the API, which is the only layer between the back and the front. The API will have authentication to protect private data. The front-end sends GET and POST requests to the API. A MVC framework can be used, such as Backbone, Angular, or Ember.js. Does this align with best practices for web development?

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• Oracle sort Solaris 11.1 et Solaris Cluster 4.1, l'OS Unix apporte plus de 300 nouvelles fonctionnalités et étend ses capacités Cloud

  Oracle Solaris 11.1 étend ses capacités Cloud le système d'exploitation Unix sort avec plus de 300 nouvelles fonctionnalités Oracle vient de présenter Solaris 11.1, la nouvelle mise à jour majeure de son système d'exploitation Unix. Cette mouture apporte plus de 300 nouvelles fonctionnalités et améliorations à la famille des produits Oracle Solaris 11. Oracle Solaris 11 est un système d'exploitation particulièrement optimisé pour la ligne des serveurs Oracle SPARC T-Series, Oracle SPARC SuperCluster T4-4, les machines Oracle Exadata Database et la solution de Cloud Oracle Exalogic Elastic Cloud engineered systems. Oracle Solaris 11 mise essentiellement sur le Cloud ...

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• How can I build this payment receipt/booking application?

  - by Festus

  I'm planning to build a payment receipt/booking application for a media company with several branches in different locations. The application should be able to move data across the network/internet to a central database where the administrator/accountant in a different location will be able to see the result of the entire job for the day from each branch. Application will run on windows environment. Will be able to send result of the booking to a Point Of Sales printer for print output. Now, I'm confused about choosing the right programming language to accomplish this task. I'm between beginner/intermediate level in PHP, I know HTML/CSS and JavaScript. I have tried to do this in PHP but, I'm face with several challenges and I fear for the POS part since PHP application run on the web browser. I don't know if python will be best suited for this and how long will it take someone with my experience level to pick up python. Any suggestion will be highly appreciated.

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• Synchronizing Mysql Table Schema [on hold]

  - by user1122069

  I have some difficulty keeping track of my SQL changes in a text file in SVN. One solution that I am aware of is to put the SQL queries in files (1.sql, 2.sql...) and to manually load each file at the proper time. Besides missing commas, the process is too cumbersome when builds become more frequent. I have actually taken to asking a co-worker to send me his SQL changes on Skype and we just apply the changes immediately on our local, development, and production servers (using three PhpMyAdmin tabs). I have seen several GUI tools mentioned in similar questions on SO, but these are actually more work and less automated than the aforementioned methods. Is there any standardized process by which this is done in an automated way? I can only guess that large companies build their own mechanisms of keeping track of database schema changes (yet I can't find a word about it - maybe they use files?). This question was closed as off-topic on Stack Overflow, so I am re-posting it here.

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• Amnesic Environment

  - by Mike Clark

  My team is looking for a technical term which may or may not exist. We are trying to describe an environment, such as a database, which has been built up over time with little or documentation about the change process that has gone into it. Generally these are legacy systems who's original developers have long since moved on and they are in such a tangled and unmanageable state that the only way to recreate the environment, say for testing purposes, is to copy it and do your best guess at re-configuring it for its new purpose. So far the best term we have come up with is Amnesic, such as "setting up the new test environment is going to be a challenge because it is an amnesic db." However, we are still not quite happy with the term and were wondering if a better and/or more accepted term for this situation exists.

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