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  • Implementation of a Rules Engine in Your Business Applicaitons

    - by enonu
    I'm for an experience driven answer from a few software engineers who have implemented a rules engine in their internal business applications. How has it affected your business in the following ways: Ability to launch and iterate over business driven logic Ability to have "business users" perform the actual modification of those rules rather than developers. Ability to comprehend the business rules in general. Quality of the software releases. More or less bugs from the end-user's POV? Speed of the applications. If you had to do it all over again, what would you do differently? Lastly, I'm looking for a qualification of your answer w/ respect to the architecture. Would you do the same thing if you were deploying to a 1-machine setup vs. your architecture vs. a multi-tier cloud-based distributed architecture using 1000s of machines? How would it be different? Thanks!

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  • What is the best language to use for building a fulfillment engine [on hold]

    - by John Stapleton
    I asked this on stack overflow and was suggested to move it here. I do understand it is a matter of opinion which is exactly what I aim to achieve here... I wanted to know what you think is the best language to write a fulfillment engine in? I cannot provide much detail but I am trying to build a control interface for servers and i wanted to build a program daemon that would process data on the authoritative server and the slave servers( the backbone of the network) with their own daemons running would check regularly(every 5 minutes or so) with the authoritative server and process the commands(securely) I am trying to build this with a minimal footprint(cpu and ram wise for the slaves, authoritative is going to be scalable) and to make it automated so that the user does not have to configure the daemon(installation is automated by the authoritative server) I am leaning away from my usual php set up for simplicity sake. Edit: I am not an expert in any particular language but flexible enough and willing to learn another.

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  • Passing data between engine layers

    - by spaceOwl
    I am building a software system (game engine with networking support ) that is made up of (roughly) these layers: Game Layer Messaging Layer Networking Layer Game related data is passed to the messaging layer (this could be anything that is game specific), where they are to be converted to network specific messages (which are then serialized to byte arrays). I'm looking for a way to be able to convert "game" data into "network" data, such that no strong coupling between these layers will exist. As it looks now, the Messaging layer sits between both layers (game and network) and "knows" both of them (it contains Converter objects that know how to translate between data objects of both layers back and forth). I am not sure this is the best solution. Is there a good design for passing objects between layers? I'd like to learn more about the different options.

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  • I've created a database table using Visual Studio for my C# program. Now what?

    - by Kevin
    Hi! I'm very new to C#, so please forgive me if I've overlooked something here. I've created a database using Visual Studio (add new item service-based database) called LoadForecast.mdf. I then created a table called ForecastsDB and added some fields. My main question is this: I've created a console application with the intention of writing some data to the newly created database. I've added LoadForecast.mdf as a data source for my program, but is there anything else I should do? I saw an example where the next step was adding a "data diagram", but this was for a visual application, not a console application. Do I still need to diagram the database for my console app? I just want to be able to write new records out to my database table and wasn't sure if there were any other things I needed to do for the VS environment to be "aware" of my database. Thanks for any advise!

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  • How do I get Phusion Passenger to work with Django for App Engine?

    - by Mike
    I'm having a devil of a time getting Phusion Passenger to work with django-nonrel for Google's App Engine. I can seem to get it to work for GoogleAppEngineLauncher and for the production server but not Passenger; or for Passenger and GoogleAppEngineLauncher but not the production server; or for Passenger and the production server but not GoogleAppEngineLauncher. How do I get my app to deploy on all three?

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  • How to deploy a Java Swing application with an embedded JavaDB database?

    - by Jonas
    I have implemented an Java Swing application that uses an embedded JavaDB database. The database need to be stored somewhere and the database tables need to be created at the first run. What is the preferred way to do these procedures? Should I always create the database in the local directory, and first check if the database file exist, and if it doesn't exist let the user create the tables (or at least show a message that the tables will be created). Or should I let the user choose a path? but then I have to save the path somewhere. Should I save the path with Preferences.systemRoot();, and check if that variable is set on startup? If the user choses a path and save it in the Preferences, can I get any problems with user permissions? or should it be safe wherever the user store the database? Or how do I handle this? Any other suggestions for this procedure?

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  • Mustache vs other engines. Maybe I should use another template engine?

    - by marcioAlmada
    I'm passing an object to mustache and this object has a method with one parameter. Is something like this possible with Mustache and PHP? {{object.method(parameter)}} If it gets too laborious to achieve this with Mustache, what template engine would you recommend? Remember I need to pass parameters to object methods while in the view context (like we do with helpers). The nearest as possible to mustache syntax is welcome.

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  • How do I upload a files to google app engine app when field name is not known

    - by Michael Neale
    I have tried a few options, none of which seem to work (if I have a simple multipart form with a named field, it works well, but when I don't know the name I can't just grab all files in the request...). I have looked at http://stackoverflow.com/questions/81451/upload-files-in-google-app-engine and it doesn't seem suitable (or to actually work, as someone mentioned the code snipped it untested).

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  • Consequences of an infinite loop on Google App Engine?

    - by Axidos
    I am not a Google App Engine user. However, I understand you're billed for CPU time and other resources. What are the consequences if you happen to create an infinite loop? Will Google ever terminate it, or will you have to do it yourself manually somehow? I'm a hobbyist developer worried about a small error that might end up costing hundreds.

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  • Google Analytics - Traffic Source - Search engine - (Not Provided)

    - by Dharmavir
    I am using Google Analytics, now here when I go to "Traffic Source Overview" under that it shows Keyword as "(Not provided)" which is almost 40% of my traffic source. Now more than 90% of search engine traffic is from Google and still out of that for more than 40% of keywords are "(Not provided)". Can anyone explain me what is going wrong here or how can I get that data? Because that comes as 1st option and is biggest keyword in the list. Will that be some crawler or secure google search?

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  • How to optimize an SQL query with many thousands of WHERE clauses

    - by bugaboo
    I have a series of queries against a very mega large database, and I have hundreds-of-thousands of ORs in WHERE clauses. What is the best and easiest way to optimize such SQL queries? I found some articles about creating temporary tables and using joins, but I am unsure. I'm new to serious SQL, and have been cutting and pasting results from one into the next. SELECT doc_id, language, author, title FROM doc_text WHERE language='fr' OR language='es' SELECT doc_id, ref_id FROM doc_ref WHERE doc_id=1234567 OR doc_id=1234570 OR doc_id=1234572 OR doc_id=1234596 OR OR OR ... SELECT ref_id, location_id FROM ref_master WHERE ref_id=098765 OR ref_id=987654 OR ref_id=876543 OR OR OR ... SELECT location_id, location_display_name FROM location SELECT doc_id, index_code, FROM doc_index WHERE doc_id=1234567 OR doc_id=1234570 OR doc_id=1234572 OR doc_id=1234596 OR OR OR x100,000 These unoptimized query can take over 24 hours each. Cheers.

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  • SQL Server many-to-many design recommendation

    - by Jean-Philippe Brabant
    I have a SQL Server database with two table : Users and Achievements. My users can have multiple achievements so it a many-to-many relation. At school we learned to create an associative table for that sort of relation. That mean creating a table with a UserID and an AchivementID. But if I have 500 users and 50 achievements that could lead to 25 000 row. As an alternative, I could add a binary field to my Users table. For example, if that field contained 10010 that would mean that this user unlocked the first and the fourth achievements. Is their other way ? And which one should I use.

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  • Has anyone tried the "objectify" library for Google App Engine?

    - by Spines
    I was using JDO for my google app engine project but got fed up with the additional 5 seconds it adds to my cold start time. I was planning on just writing stuff directly to the database with the low level datastore api, but then I came accross the objectify project ( http://code.google.com/p/objectify-appengine/ ). Apparently its a super light wrapper above the low level api. Does anyone have experiences with this library that they could share?

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  • How To Change the Default Search Engine in Windows 8's Internet Explorer 10

    - by Chris Hoffman
    You can change the default search provider in the Modern version of Internet Explorer 10, but Microsoft hides this option well. You won’t find it in IE’s Settings charm – you’ll have to change this setting from the desktop. After you change this setting on the desktop, both versions of Internet Explorer will use your preferred search engine. You’ll have to use the desktop to change certain settings on Windows tablets — even Windows RT includes a limited desktop. 6 Start Menu Replacements for Windows 8 What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? How To Log Into The Desktop, Add a Start Menu, and Disable Hot Corners in Windows 8

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  • choose append to existing backup instead of overwrite

    - by aron
    Hello, I have a database and I made it's first backup 2 days ago. Then yesterday I spent an entire adding new records. This morning I ran a backup, (but I selected append to existing backup set) as pictured below. I just ran a restore and I found that it wiped out all my data from yesterday and it restored it from the backup of 2 days ago. Not the version from this mornings backup. I zipped this backup file to be safe. I changed some data in the DB, Then I ran the back up again, but this time I selected "overwrite all existing backup sets" Now when I restore the db it's seems to restore the data from the backup correctly. I think I learned a lesson here, correctly if I'm wrong My questions is, Did I lose an entire day of work? I still have this morning's backup .bak file safe in a zip. Is there anyway I can restore is with the right data?

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  • How to represent a Many-To-Many relationship in XML or other simple file format?

    - by CSharperWithJava
    I have a list management appliaction that stores its data in a many-to-many relationship database. I.E. A note can be in any number of lists, and a list can have any number of notes. I also can export this data to and XML file and import it in another instance of my app for sharing lists between users. However, this is based on a legacy system where the list to note relationship was one-to-many (ideal for XML). Now a note that is in multiple lists is esentially split into two identical rows in the DB and all relation between them is lost. Question: How can I represent this many-to-many relationship in a simple, standard file format? (Preferably XML to maintain backwards compatibility)

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