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  • Java singleton VO class implementing serializable, having default values using getter methods

    - by user309281
    Hi All I have a J2SE application having user threads running in a separate JVM outside JBOSS server. During startup, J2SE invokes a EJB inside jboss, by passing a new object(singleton) of simple JAVA VO class having getter/setter methods. {The VO class is a singleton and implements serialiable(as mandated by EJB)}. EJB receives the object, reads all db configuration and uses the setter methods of new object to set all the values. It then returns back this updated object back to J2SE in the same remote call. After J2SE receives the object(singleton/serializable), if i invoke getter methods, I could see only default values set during object creation before EJB call, and not the values set by the EJB. Kindly throw some light on, why the received object from EJB does not see any updated values and how to rectify this. I believe it got to do with object initialization during deserialization. And i tried overriding readResolve() in the VO class, but of no help. With Regards, Krishna

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  • Hot deploy on Heroku with no downtime

    - by zetarun
    A bad side of pushing to Heroku is that I must push the code (and the server restarts automatically) before running my db migrations. This can obviously cause some 500 errors on users navigating the website having the new code without the new tables/attributes: the solution proposed by Heroku is to use the maintenance mode, but I want a way with no downside letting my webapp running everytime! Is there a way? For example with Capistrano: I prepare the code to deploy in a new dir I run (backward) migrations and the old code continue to work perfectly I swith mongrel instance to the new dir and restart the server ...and I have no downtime!

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  • Storing uploaded content on a website

    - by Matt
    For the past 5 years, my typical solution for storing uploaded files (images, videos, documents, etc) was to throw everything into an "upload" folder and give it a unique name. I'm looking to refine my methods for storing uploaded content and I'm just wondering what other methods are used / preferred. I've considered storing each item in their own folder (folder name is the Id in the db) so I can preserve the uploaded file name. I've also considered uploading all media to a locked folder, then using a file handler, which you pass the Id of the file you want to download in the querystring, it would then read the file and send the bytes to the user. This is handy for checking access, and restricting bandwidth for users.

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  • CheckBox and the ContextMenu

    - by anselmophil
    Hi guys! I have in a ListView with a ContextMenu, it has one CheckBox (the CheckBox has android:focusable="false") and one TextView per row, but you can hide the TextView in the preferences menu. After doing that, the CheckBox wasnt registering the ContextMenu, so of course, why not registerForContextMenu(cb) and unregisterForContextMenu(getListView())? Yes, i did that, but then, when when i call the delete command of onContextItemSelected, the app crashs. AdapterContextMenuInfo info=(AdapterContextMenuInfo)item.getMenuInfo(); db.deletarTarefa(info.id); So here i am, accepting ideias and help! :) Thanks

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  • MySQL or SQL Server

    - by user203708
    I'm creating an application that I want to run on either MySQL or SQL Server (not both at the same time) I've created two PHP classes DatabaseMySQL and DatabaseSQLSVR and I'd like my application to know which database class to use based on a constant set up at install. define(DB_TYPE, "mysql"); // or "sqlsrv" I'm trying to think of the best way to handle this. My thought is to do an "if else" wherever I instantiate the database: $db = (DB_TYPE == "mysql") ? new DatabaseMySQL : new DatabaseSQLSVR; I know there has to be a better way of doing this though. Suppose I want to add a third database type later; I'll have to go and redo all my code. Yuk!! Any help would be much appreciated. Thank

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  • Zend Framework Error:Invalid parameter number: no parameters were bound'

    - by roast_soul
    I'm using the Zend Frameworker 1.12. According to the help file, I used the Zend_Db_Statement to execute my sql. Below is my php code: $sql = "delete from options where id=?"; $stmt = new Zend_Db_Statement_Mysqli($this->getAdapter(), $sql); return $stmt->execute(array('1')); But the error is exception 'PDOException' with message 'SQLSTATE[HY093]: Invalid parameter number: no parameters were bound' in D:\Zend\workspaces\DefaultWorkspace.metadata.plugins\org.zend.php.framework.resource\resources\ZendFramework-1\library\Zend\Db\Statement\Mysqli.php:209 Stack trace: ......... ......... I googled for days, but nothing works. Any one know how to fix it?

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  • Combine query results from one table with the defaults from another

    - by pulegium
    This is a dumbed down version of the real table data, so may look bit silly. Table 1 (users): id INT username TEXT favourite_food TEXT food_pref_id INT Table 2 (food_preferences): id INT food_type TEXT The logic is as follows: Let's say I have this in my food preference table: 1, 'VEGETARIAN' and this in the users table: 1, 'John', NULL, 1 2, 'Pete', 'Curry', 1 In which case John defaults to be a vegetarian, but Pete should show up as a person who enjoys curry. Question, is there any way to combine the query into one select statement, so that it would get the default from the preferences table if the favourite_food column is NULL? I can obviously do this in application logic, but would be nice just to offload this to SQL, if possible. DB is SQLite3...

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  • aspnet_regsql not working at all

    - by user252160
    I would like to create the ASP.NET User database template on a database of my own, because I'd like to fully untegrate the user system with the rest of my DB. As I've read, i needed to use the aspnet_regsql tool. I put all the options (because my database is running on SQLEXPRESS and is in an mdf file in my project's folder). the program starts and seemingly runs without any errors, however, when I open the database after that, not tables or stored procedures have been added. One more thing: I did one more test. I intentionally gave the -d option a wrong mdf file address, and surprisingly, the program "finished" correctly, yet no file was crated or modified whatsoever.

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  • yiic shell: failed to perform 'crud'

    - by ufw
    Debian Squeeze, PHP 5.3.2-1, Yii 1.1.2, PHP $path to php is /usr/bin/php, permissions are '777'. When I try to run 'crud Test' in yii shell, I get the following error message: PHP Warning: include(/var/www/test/protected/models/Test.php): failed to open stream: No such file or directory in /var/www/yii/framework/YiiBase.php on line 335 PHP Warning: include(): Failed opening '/var/www/test/protected/models/Test.php' for inclusion (include_path='.:/var/www/test/protected/components:/var/www/test/protected/models:/usr/share/php:/usr/share/pear') in /var/www/yii/framework/YiiBase.php on line 335 PHP Fatal error: Class 'Test' not found in /var/www/yii/framework/db/ar/CActiveRecord.php on line 341

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  • LINQ to SQL: Issue with concurrency

    - by Gib
    I’m working on a sandwich ordering app in ASP.NET MVC, C# and LINQ to SQL. The app revolves around the user creating multiple custom-made sandwiches from a selection of ingredients. When it comes to confirming the order I need to know that there’s enough portions of each ingredient to fulfil all the sandwiches in the user’s order before I commit to the DB as it is possible that an ingredient will go out of stock between adding it to their basket and confirming the order. A bit about the database: Ingredient – Stores ingredient details including number of portions Order – Header table for an order, simply stores the order time OrderDetail – Stores a record of each sandwich in an order OrderDetailItem – Stores each ingredient in each sandwich in an order So basically I’m wondering what the best approach to ensuring that before I add records to Order, OrderDetail and OrderDetailItem I can ensure that the order can be met.

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  • A column insert or update conflicts with a rule imposed by a previous CREATE RULE statement.

    - by Ronnie Chester Lynwood
    hello. im working on a online game. i got some problems with inserting new data to table. im getting 2010-4-8 2:14, *** 37000, 513, [Microsoft][ODBC SQL Server Driver][SQL Server]A column insert or update conflicts with a rule imposed by a previous CREATE RULE statement. The statement was terminated. The conflict occurred in database 'KN_online', table 'ACCOUNT_CHAR', column 'strAccountID'., 261 NationSelect*** this error in logs. what does this means? how can i fix this? i've tried to delete RULE for my DB but I'm unable to delete RULE. im getting the rule 'dbo.unallowedchars' cannot be dropped because it is bounded to one or more clumn. I set all permissions right but its still not working.. thanks..

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  • How to decouple an app's agile development from a database using BDUF?

    - by Rob Wells
    G'day, I was reading the article "Database as a Fortress" by Dan Chak from the excellent book "97 Things Every Software Architect Should Know" (sanitised Amazon link) which suggests that databases should not be designed using an agile approach. There's an SO question on agile approaches and databases "Agile development and database changes" which has some excellent answers covering agile development approaches. In fact, one of the answers supplies a brilliant idea of what's needed for each update of the DB. ;-) But after reading Dan Chak's article, I am left wondering if an agile approach is really suitable for large scale systems. This of course leads on to the question of how best to decouple an agile approach for the application that is interacting with the BDUF database design without adding complicated translation layers in the final design employed? Any suggestions? cheers,

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  • Loading tables dynamically with NHibernate

    - by Trevor Goertzen
    I'm working on a project that requires me to load tables based on table names stored in another table. More tables will be added to the DB (and by someone else), so creating NHibernate mapping files for each table isn't an option. Does anyone know if it is possible to load tables dynamically using NHibernate? Edit: I should add that I'm on .NET 2.0, so I can't use Fluent NHibernate. Thanks for the suggestion though guys. I will use that as evidence in convincing my associates to upgrade.

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  • Connection to DB2 in Python

    - by Mestika
    Hi, I'm trying to create a database connection in a python script to my DB2 database. When the connection is done I've to run some different SQL statements. I googled the problem and has read the ibm_db API (http://code.google.com/p/ibm-db/wiki/APIs) but just can't seem to get it right. Here is what I got so far: import sys import getopt import timeit import multiprocessing import random import os import re import ibm_db import time from string import maketrans query_str = None conn = ibm_db.pconnect("dsn=write","usrname","secret") query_stmt = ibm_db.prepare(conn, query_str) ibm_db.execute(query_stmt, "SELECT COUNT(*) FROM accounts") result = ibm_db.fetch_assoc() print result status = ibm_db.close(conn) but I get an error. I really tried everything (or, not everything but pretty damn close) and I can't get it to work. I just need to make a automatic test python script that can test different queries with different indexes and so on and for that I need to create and remove indexes a long the way. Hope someone has a solutions or maybe knows about some example codes out there I can download and study. Thanks Mestika

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  • ASP.NET Dates Deployment Issue

    - by Jonathan Stowell
    Hi guys, I recently bought some webspace with dailyrazor.com. I have deployed an application I have been working on to the server and am currently trying to workout the bugs but I can't seem to solve this one. I have set up my database in Visual Studio to use the one I have create with dailyrazor the same db the deployed version will use. I am using British Dates and on my localhost datetime is displayed: 27/05/2010 09:00 However on the dailyrazor host it is displayed: 5/27/2010 9:00 AM Short Dates e.g. 27/04/2010 display the same on both servers. This is causing some issues when entering data as errors occur on date fields. Any help would be appreciated. Thanks, Jon

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  • How can we order a column as int using hibernate criteria API?

    - by Satya
    Hi I want to fetch the data form data base using hibernate Criteria API. That data should be ordered by some column as number. This column is defined as varchar in DB. But I have to fetch as numberic. I am facing problem using criteria API as it is ordering like string onyly. Ex: I am getting data like 9, 8, 7, 6, 5, 4, 3, 2, 1,10 but i want data as 10,9,8,7,6,5,4,3,2,1 Is there any Hibernate methods to covert varchar to number like convert("some column",int ) or cast("some column",int) ?

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  • Passing arguments and values form HTML to jQuery (events)

    - by Jaroslav Moravec
    What is the practice to pass arguments from HTML to jQuery events function. For example getting id of row from db: <tr class="jq_killMe" id="thisItemId-id"> ... </tr> and jQuery: $(".jq_killMe").click(function () { var tmp = $(this).attr('id).split("-"); var id = tmp[0] // ... } What's the best practise, if I want to pass more than one argument? Is it better not to use jQuery? For example: <tr onclick="killMe('id')"> ... </tr> I didn't find the answer on my question, I will be glad even for links. Thanks.

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  • Joomla Development - Allow Direct File Access AND use Joomla-intern Framework

    - by Email
    Hi As usual you write in Joomla Development defined('_JEXEC') or die('Restricted access'); I make a plugin which needs access from Paypal/IPN, so i exclude that in that specific file. BUT I also need to use the Joomla-intern Variables to access the Database, so i tried this: require("../filewithaccesstoframework.php"); OR even $baseurl = $_SERVER['HTTP_HOST']; $baseurl ="http://".$baseurl."/configuration.php"; require($baseurl); By using the first code it displays "Restircted Access" since it seems to take this from the included file which i can't skip to put-in-there. The second code does not seem to recognize the Variables used in configuration.php like $host, $db, $password. the file configuration.php is chmod 444 Why this happens and is there a workarround to allow direct access to a file AND using the Joomla intern Framework (Variables, Functions)?

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  • Display a MYSQL field using CAKE

    - by adam
    Forgive me if this is a "homework" question. We have a "Rating" table in our mysql db. I want to display this number on our user profile page. JUST BELOW THE GRAVATAR. here is the code in app/views/user/view.ctp <div class="nhplft"> flash(); ? ?d=identicon&s=100" border="0" alt="My Avatar! UID:" / Change Image link("Home",'/items'); ?  |  link('Add',array('controller' = 'items','action'='add')); ?  |  link('Search',array('controller'='items','action'='index')); ?  |  link("Logout",'/users/logout'); } ?

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  • Does Ruby on Rails "has_many" array provide data on a "need to know" basis?

    - by Jian Lin
    On Ruby on Rails, say, if the Actor model object is Tom Hanks, and the "has_many" fans is 20,000 Fan objects, then actor.fans gives an Array with 20,000 elements. Probably, the elements are not pre-populated with values? Otherwise, getting each Actor object from the DB can be extremely time consuming. So it is on a "need to know" basis? So does it pull data when I access actor.fans[500], and pull data when I access actor.fans[0]? If it jumps from each record to record, then it won't be able to optimize performance by doing sequential read, which can be faster on the hard disk because those records could be in the nearby sector / platter layer -- for example, if the program touches 2 random elements, then it will be faster just to read those 2 records, but what if it touches all elements in random order, then it may be faster just to read all records in a sequential way, and then process the random elements. But how will RoR know whether I am doing only a few random elements or all elements in random?

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  • Hibernate: same generated value in two properties

    - by Markos Fragkakis
    Hi, I have an entity A with fields: aId (the system id) bId I want the first to be generated: @Id @Column(name = "PRODUCT_ID", unique = true, nullable = false, precision = 12, scale = 0) @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "PROD_GEN") @BusinessKey public Long getAId() { return this.aId; } I want the bId to be initially exactly as the aId. One approach is to insert the entity, then get the aId generated by the DB (2nd query) and then update the entity, setting the bId to be equal to aId (3rd query). Is there a way to get the bId to get the same generated value as aId? Note that afterwards, I want to be able to update bId from my gui. If the solution is JPA, even better.

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  • Perl Math::Business::EMA help

    - by Dustin
    Script pulls data from mysql: $DBI::result = $db->prepare(qq{ SELECT close FROM $table WHERE day <= '$DATE' ORDER BY day DESC LIMIT $EMA }); $DBI::result->execute(); while($row = $DBI::result->fetchrow) { print "$row\n"; }; with the following example results: 1.560 1.560 1.550... But I need to work out the EMA using Math::Business::EMA; and I'm not sure how to calculate this while maintaining the accuracy. EMA is weighted and My lack of Perl knowledge is not helping.

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  • SQL Server 2008 BULK INSERT causes more reads than writes. Why?

    - by sh1ng
    I've huge a table (a few billion rows) with a clustered index and two non-clustered indices. A BULK INSERT operation produces 112000 reads and only 383 writes (duration 19948ms). It's very confusing to me. Why do reads exceed writes? How can I reduce it? update query insert bulk DenormalizedPrice4 ([DP_ID] BigInt, [DP_CountryID] Int, [DP_OperatorID] SmallInt, [DP_OperatorPriceID] BigInt, [DP_SpoID] Int, [DP_TourTypeID] Int, [DP_CheckinDate] Date, [DP_CurrencyID] SmallInt, [DP_Cost] Decimal(9,2), [DP_FirstCityID] Int, [DP_FirstHotelID] Int, [DP_FirstBuildingID] Int, [DP_FirstHotelGlobalStarID] Int, [DP_FirstHotelGlobalMealID] Int, [DP_FirstHotelAccommodationTypeID] Int, [DP_FirstHotelRoomCategoryID] Int, [DP_FirstHotelRoomTypeID] Int, [DP_Days] TinyInt, [DP_Nights] TinyInt, [DP_ChildrenCount] TinyInt, [DP_AdultsCount] TinyInt, [DP_TariffID] Int, [DP_DepartureCityID] Int, [DP_DateCreated] SmallDateTime, [DP_DateDenormalized] SmallDateTime, [DP_IsHide] Bit, [DP_FirstHotelAccommodationID] Int) with (CHECK_CONSTRAINTS) No triggers & foreign keys Cluster Index by DP_ID and two non-unique indexes(with fillfactor=90%) And one more thing DB stored on RAID50 with stripe size 256K

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  • MSSQL 2000 Stored Procedure to Split Shift Times

    - by JClaspill
    I am being asked to alter a system to include the ability to have pay differentials based on hours worked. The old method included a stored procedure (MSSQL2000 db) that did the basics, but simply knows the start and end of every shift. So, this is the information I start with: EMPLOYEE | TYPE | HOURS | INSTAMP | OUTSTAMP Dave | Hourly | 8.643055 | 2011-01-08 07:57:35.557 | 2011-01-08 16:36:10.120 And I need to turn that into something like: EMPLOYEE | TYPE | HOURS | INSTAMP | OUTSTAMP Dave | Hourly | 4.00 | 2011-01-08 08:00:00.000 | 2011-01-08 12:00:00.000 Dave | ShiftDiff1 | 4.50 | 2011-01-08 12:00:00.000 | 2011-01-08 16:30:00.000 The ShiftDiff's range from hours to certain days, to a combo of both. Should I try to make the SQL2000 SP do this or pass the info back to my ASP.NET(C#) app and let it handle it, then send back?

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  • Redirects in RoR: Which one to use?

    - by scrr
    Hello, we are making a website that takes a generated incoming link and forwards the user who is clicking on it to another website while saving a record of the action in our DB. I guess it's basically what ad-services like AdSense do. However, what is the best way to redirect the user? I think html-meta-tag-redirects are out of question. So what other options are there? head :moved_permanently, :location => "http://www.domain.com/" This one is a 301-redirect. The next one is a 302: redirect_to "http://www.domain.com" Are there any others? And which is best to use for our case? The links are highly-dynamic and change all the time. We want to make sure we don't violate any existing standards and of course we don't want search-engines to tag us as spammers (which we are not, btw). Thanks!

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