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• Projects integration question

  - by qkrsppopcmpt

  Other team has one legacy system, which is data aggregators. It is implemented as web service using JAVA, SOAP,MTOM,Tomcat and Axis2. They have wsdl files defining functionalities such as search, retrieve data, upload, download. Our team has a new developed website which is developed using RoR with mySQL. It is sort of social networking. Users can register, add friends, upload images, videos. Also, they can search data. We are required to connect the two systems. One possible solution I think is - Adding components into our website. The component invoke services on the aggregators. - Synchronize website database to the aggregators. My doubts are: 1. How to add components in our websites? The components should use Java or Ruby or adapter from java to ruby. It is possible using ruby invoke web service. I think it should work since it is the point of web service. If so, can ruby call those services in wsdl directly? But how to deal with those different data structure? How to synchroinze our database to the aggregators. I think the best way is also through web service invocation such as upload. That means, we have to export the db records into xml files and then write some tools to upload. The web service project support MTOM. So, it is fine to upload huge data. Am I on the right record? Can anybody give me some hint. Thanks.

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• How to maintain a persistant network-connection between two applications over a network?

  - by John

  I was recently approached by my management with an interesting problem - where I am pretty sure I am telling my bosses the correct information but I really want to make sure I am telling them the correct stuff. I am being asked to develop some software that has this function: An application at one location is constantly processing real-time data every second and only generates data if the underlying data has changed in any way. On the event that the data has changed send the results to another box over a network Maintains a persistent connection between the both machines, altering the remote box if for some reason the network connection went down From what I understand, I imagine that I need to do some reading on doing some sort of TCP/IP socket-level stuff. That way if the connection is dropped the remote location will be aware that the data it has received may be stale. However management seems to be very convinced that this can be accomplished using SOAP. I was under the impression that SOAP is more or less a way for a client to initiate a procedure from a server and get some results via the HTTP protocol. Am I wrong in assuming this? I haven't been able to find much information on how SOAP might be able to solve a problem like this. I feel like a lot of people around my office are using SOAP as a buzzword and that has generated a bit of confusion over what SOAP actually is - and is capable of. Any thoughts on how to accomplish this task would be appreciated!

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• WCF Dataservices and OData

  - by rkrauter

  Could someone please explain the difference? From what I understand, I could expose my data directly using WCF data services or expose it using OData. http://msdn.microsoft.com/en-us/data/aa937697.aspx

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• Output of System.out.println(object)

  - by Shaarad Dalvi

  I want to know what exactly the output tells when I do the following : class data { int a=5; } class main { public static void main(String[] args) { data dObj=new data(); System.out.println(dObj); } } I know it gives something related to object as the output in my case is data@1ae73783. I guess the '1ae73783' is a hex number. I also did some work around and printed System.out.println(dObj.hashCode()); I got number 415360643. I got an integer value. I don't know what hashCode() returns, still out of curiosity, when I converted 1ae73783 to decimal, I got 415360643! That's why I am curious that what exactly is this number?? Is this some memory location of Java's sandbox or some other thing? Any light on this matter will be helpful..thanks! :)

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• Get the value of an attribute Jquery

  - by Abu Hamzah

  i am trying to get EmployeeId withitn the DOM something like this: var o = obj[$(this).attr("EmployeeId")]; but getting undefined when i debug i see the following: $(this)[0].data data "{EmployeeId: 'A42345'}" here is my source code: $.ajax({ type: "POST", url: url, data: "{EmployeeId: '" + id + "'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function (response) { var obj = (typeof response.d) == 'string' ? eval('(' + response.d + ')') : response.d; var o = obj[$(this).attr("EmployeeId")]; //<<<<undefined

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• R: Are there any alternatives to loops for subsetting from an optimization standpoint?

  - by Adam

  A recurring analysis paradigm I encounter in my research is the need to subset based on all different group id values, performing statistical analysis on each group in turn, and putting the results in an output matrix for further processing/summarizing. How I typically do this in R is something like the following: data.mat <- read.csv("...") groupids <- unique(data.mat$ID) #Assume there are then 100 unique groups results <- matrix(rep("NA",300),ncol=3,nrow=100) for(i in 1:100) { tempmat <- subset(data.mat,ID==groupids[i]) #Run various stats on tempmat (correlations, regressions, etc), checking to #make sure this specific group doesn't have NAs in the variables I'm using #and assign results to x, y, and z, for example. results[i,1] <- x results[i,2] <- y results[i,3] <- z } This ends up working for me, but depending on the size of the data and the number of groups I'm working with, this can take up to three days. Besides branching out into parallel processing, is there any "trick" for making something like this run faster? For instance, converting the loops into something else (something like an apply with a function containing the stats I want to run inside the loop), or eliminating the need to actually assign the subset of data to a variable?

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• SQL Server 2008 Insert performance issue

  - by mithiya

  is there any way to increase performance of SQL server inserts, as you can see below i have used below sql 2005, 2008 and oracle. i am moving data from ORACLe to SQL. while inserting data to SQL i am using a procedure. insert to Oracles is very fast in compare to SQL, is there any way increase performance. or a better way to move data from Oracle to SQL (data size approx 100000 records an hour) please find below stats as i gathered, RUN1 and RUN2 time is in millisecond.

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• ASP.NET SqlDataSource update and create FK reference

  - by William

  The short version: I have a grid view bound to a data source which has a SelectCommand with a left join in it because the FK can be null. On Update I want to create a record in the FK table if the FK is null and then update the parent table with the new records ID. Is this possible to do with just SqlDataSources? The detailed version: I have two tables: Company and Address. The column Company.AddressId can be null. On my ascx page I am using a SqlDataSource to select a left join of company and address and a GridView to display the results. By having my UpdateCommand and DeleteCommand of the SqlDataSource execute two statements separated by a semi-colon I am able to use the GridView's Edit and Delete functionality to update both table simultaneously. The problem I have is when the Company.AddressId is null. What I need to have happen is have the data source create a record in the Address table and then update the Company table with the new Address.ID then proceed with the update as usual. I would like to do this with just data sources if possible for consistency/simplicity sake. Is it possible to have my data source do this, or perhaps add a second data source to the page to handle some of this? Once I have that working I can probably figure out how to make it work with the InsertCommand as well but if you are on a roll and have an answer for how to make that fly as well feel free to provide it. Thanks.

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• What's wrong in this SELECT statement

  - by user522211

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim SQLData As New System.Data.SqlClient.SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True") Dim cmdSelect As New System.Data.SqlClient.SqlCommand("SELECT * FROM Table1 WHERE Seats ='" & TextBox1.Text & "'", SQLData) SQLData.Open() Using adapter As New SqlDataAdapter(cmdSelect) Using table As New Data.DataTable() adapter.Fill(table) TextBox1.Text = [String].Join(", ", table.AsEnumerable().[Select](Function(r) r.Field(Of Integer)("seat_select"))) End Using End Using SQLData.Close() End Sub This line will be highlighted with blue line: TextBox1.Text = [String].Join(", ", table.AsEnumerable().[Select](Function(r) r.Field(Of Integer)("seat_select")))

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• 500 internal server error at form connection

  - by klox

  hi..all..i've a problem i can't connect to database what's wrong with my code?this is my code: $("#mod").change(function() { var barcode; barCode=$("#mod").val(); var data=barCode.split(" "); $("#mod").val(data[0]); $("#seri").val(data[1]); var str=data[0]; var matches=str.match(/(EE|[EJU]).*(D)/i); $.ajax({ type:"post", url:"process1.php", data:"value="+matches+"action=tunermatches", cache:false, async:false, success: function(res){ $('#rslt').replaceWith( "<div id='value'><h6>Tuner range is" + res + " .</h6></div>" ); } }); }); and this is my process file: switch(postVar('action')) { case 'tunermatches' : tunermatches(postVar('tuner')); break; function tunermatches($tuner)){ $Tuner=mysql_real_escape_string($tuner); $sql= "SELECT remark FROM settingdata WHERE itemname="Tuner_range" AND itemdata="$Tunermatches"; $res=mysql_query($sql); $dat=mysql_fetch_array($res,MYSQL_NUM); if($dat[0]>0) { echo $dat[0]; } mysql_close($dbc); }

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• JList not showing items or showing selectively.

  - by Avrahamshuk

  I have a Java Swing application using a JList to show some data from a DB. I am using DefaulListModel as the data model for the list in this way: void PopulateSoldiersList() { try { soldiersListModel = new DefaultListModel(); for (Soldier i : myBackEnd.GetAllSoldiers()) { soldiersListModel.addElement(i); } this.listSoldiers.setModel(soldiersListModel); } catch (Exception ex) {// Error Message} } And for some reason, the list just stays empty... I even did make sure at runtime that all the data is set up properly in the data model and even in the "dataModel" property of the JList! In other place at the app i have a similar problem, but there, sometimes the list show few items from the model (but not all of them) I have no idea where to go from here... please help. Thanks!

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• Pass javascript array to php by using curly braces key name

  - by user7031

  My js code: $(function(){ var arr = new Array('jj', 'kk', 'oo'); $.post('test12.php', {'arr[]': arr}, function(data){ alert(data); }); }); PHP code: <?php echo print_r($_POST['arr']); The thing is,$.post receive a key named 'arr[]',it should be used in PHP as 'arr[]' instead of 'arr',but '$_POST['arr[]']' doesn't work,'arr' works.Which seems that Jquery might do something with curly braces '[]' before sending something to PHP. Secondly,when I remove the single quotas around 'arr[]',PHP can not receive anything by using $_POST['arr'];,I don't know why? Doing this task in a traditional way with no curly braces: $.post('test12.php', {arr: arr}, function(data){ alert(data); }); It works fine. So when sending javascript array to PHP,why bothering using single quote and curly braces like 'arr[]' instead of using a concise way like arr:arr My return result is Array( [0]=>jj [1]=>kk [2]=>oo ) 1 Notice there is a 1 under the array,why?

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• What alternatives are there for asp.net forms authentication?

  - by Eytan Levit

  Hi, We are developing a web app that will have a pretty complex user and permission system. The general idea is that we have 3 levels of security: a simple user - that can only access basic data that is in a data repository a manager - that can open up data repositories a superuser - that can open up repository factories. each repository contains various data types(text, images, etc etc). We are looking for authentication methods that will allow us: 1. Scalability. 2. Customization. 3. To create permissions that will effect the GUI + deny access to certain pages. 4. To create predefined roles - that will allow for easy setup of new users. 5. To create custom roles for specific users - allowing them permission sets that are different from the predefined roles. Thanks in advance

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• Finding contained bordered regions from Excel imports.

  - by dmaruca

  I am importing massive amounts of data from Excel that have various table layouts. I have good enough table detection routines and merge cell handling, but I am running into a problem when it comes to dealing with borders. Namely performance. The bordered regions in some of these files have meaning. Data Setup: I am importing directly from Office Open XML using VB6 and MSXML. The data is parsed from the XML into a dictionary of cell data. This wonks wonderfully and is just as fast as using docmd.transferspreadsheet in Access, but returns much better results. Each cell contains a pointer to a style element which contains a pointer to a border element that defines the visibility and weight of each border (this is how the data is structured inside OpenXML, also). Challenge: What I'm trying to do is find every region that is enclosed inside borders, and create a list of cells that are inside that region. What I have done: I initially created a BFS(breadth first search) fill routine to find these areas. This works wonderfully and fast for "normal" sized spreadsheets, but gets way too slow for imports into the thousands of rows. One problem is that a border in Excel could be stored in the cell you are checking or the opposing border in the adjacent cell. That's ok, I can consolidate that data on import to reduce the number of checks needed. One thing I thought about doing is to create a separate graph that outlines the cells using the borders as my edges and using a graph algorithm to find regions that way, but I'm having trouble figuring out how to implement the algorithm. I've used Dijkstra in the past and thought I could do similar with this. So I can span out using no endpoint to search the entire graph, and if I encounter a closed node I know that I just found an enclosed region, but how can I know if the route I've found is the optimal one? I guess I could flag that to run a separate check for the found closed node to the previous node ignoring that one edge. This could work, but wouldn't be much better performance wise on dense graphs. Can anyone else suggest a better method? Thanks for taking the time to read this.

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• Filtering coluns in SQL Server replication - how?

  - by truthseeker

  Hi, I need to replicate some data from two tables in one database to another databases. I used snapshot replication. The issue is that I would like to replicate only some selected columns and the others should stay with untouched data. I don't want to loose their data. The sours of those columns is other system. So I need to replicate only data from my columns. Do anybody know how to achieve this?

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• Use Shakespeare-text and external file

  - by Adam

  How can I convert the below example to use an external file instead of the embedded lazy text quasi quotes? {-# LANGUAGE QuasiQuotes, OverloadedStrings #-} import Text.Shakespeare.Text import qualified Data.Text.Lazy.IO as TLIO import Data.Text (Text) import Control.Monad (forM_) data Item = Item { itemName :: Text , itemQty :: Int } items :: [Item] items = [ Item "apples" 5 , Item "bananas" 10 ] main :: IO () main = forM_ items $ \item -> TLIO.putStrLn [lt|You have #{show $ itemQty item} #{itemName item}.|] This is from the yesod online book.

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• Should I use a binary or a text file for storing protobuf messages?

  - by nbolton

  Using Google protobuf, I am saving my serialized messaged data to a file - in each file there are several messages. We have both C++ and Python versions of the code, so I need to use protobuf functions that are available in both languages. I have experimented with using SerializeToArray and SerializeAsString and there seems to be the following unfortunate conditions: SerializeToArray: As suggested in one answer, the best way to use this is to prefix each message with it's data size. This would work great for C++, but in Python it doesn't look like this is possible - am I wrong? SerializeAsString: This generates a serialized string equivalent to it's binary counterpart - which I can save to a file, but what happens if one of the characters in the serialization result is \n - how do we find line endings, or the ending of messages for that matter? Update: Please allow me to rephrase slightly. As I understand it, I cannot write binary data in C++ because then our Python application cannot read the data, since it can only parse string serialized messages. Should I then instead use SerializeAsString in both C++ and Python? If yes, then is it best practice to store such data in a text file rather than a binary file? My gut feeling is binary, but as you can see this doesn't look like an option.

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• Make Excel Defined Names within a worksheet to be global

  - by idazuwaika

  Hi, I wrote Powershell script to copy a worksheet from a workbook A to another workbook B. The worksheet contains define names for ranges within that sheet. Originally, the defined names are global in workbook A, ie. can be referenced from any worksheets within workbook A. But now, after copy to worksheet B, the defined names are limited to that worksheet only. How to I programmatically (via Powershell script preferably) make all those named range global i.e. can be referenced from all worksheets within workbook B. Some codes for clarity. #Script to update SOP from 5.1 to 5.2 $missing = [System.Type]::missing #Open files $excel = New-Object -Com Excel.Application $excel.Visible = $False $excel.DisplayAlerts = $False $newTemplate = "C:\WorkbookA.xls" $wbTemplate = $excel.Workbooks.Open($newTemplate) $oldSop = "C:\WorkbookB.xls" $wbOldSop = $excel.Workbooks.Open($oldSop) #Delete 'DATA' worksheet from old file $wsOldData = $wbOldSop.Worksheets.Item("DATA") $wsOldData.Delete() #Copy new 'DATA' worksheet to old file $wbTemplate.Worksheets.Item("DATA").Copy($missing,$wbOldSop.Worksheets.Item("STATUS")) #Save $wbOldSop.Save() $wbOldSop.Close() #Quit Excel $excel.Quit()

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• PHP5 getrusage() returning incorrect information?

  - by Andrew

  I'm trying to determine CPU usage of my PHP scripts. I just found this article which details how to find system and user CPU usage time (Section 4). However, when I tried out the examples, I received completely different results. The first example: sleep(3); $data = getrusage(); echo "User time: ". ($data['ru_utime.tv_sec'] + $data['ru_utime.tv_usec'] / 1000000); echo "System time: ". ($data['ru_stime.tv_sec'] + $data['ru_stime.tv_usec'] / 1000000); Results in: User time: 29.53 System time: 2.71 Example 2: for($i=0;$i<10000000;$i++) { } // Same echo statements Results: User time: 16.69 System time: 2.1 Example 3: $start = microtime(true); while(microtime(true) - $start < 3) { } // Same echo statements Results: User time: 34.94 System time: 3.14 Obviously, none of the information is correct except maybe the system time in the third example. So what am I doing wrong? I'd really like to be able to use this information, but it needs to be reliable. I'm using Ubuntu Server 8.04 LTS (32-bit) and this is the output of php -v: PHP 5.2.4-2ubuntu5.10 with Suhosin-Patch 0.9.6.2 (cli) (built: Jan 6 2010 22:01:14) Copyright (c) 1997-2007 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies

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• Using rendrer in list in flex

  - by Anshuman Jaiswal

  Hi all I am using list component in flex & using custom itemRenderer i.e I have made a component named frameRenrer(there are two controls ImageControl and label control) where I set the image source and label text on creationComplete event.And I providing the data using dataProvider function in List component.But actually problem is that when I scroll this list only 4 items are displayed repeatedly and to check it I make a function on mouseOver of image control in this I am using Alert.show(data.label); then it shows the correct data but it is not displayed in the list.In data provider I am using ArrayCollection. What is the problem anyone????

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• MySQL: How to pull information from multiple tables based on information in other tables?

  - by Greg

  Ok, I have 5 tables which I need to pull information from based on one variable. gameinfo id | name | platforminfoid gamerinfo id | name | contact | tag platforminfo id | name | abbreviation rosterinfo id | name | gameinfoid rosters id | gamerinfoid | rosterinfoid The 1 variable would be gamerinfo.id, which would then pull all relevant data from gamerinfo, which would pull all relevant data from rosters, which would pull all relevant data from rosterinfo, which would pull all relevant data from gameinfo, which would then pull all relevant data from platforminfo. Basically it breaks down like this: gamerinfo contains the gamers basic information. rosterinfo contains basic information about the rosters (ie name and the game the roster is aimed towards) rosters contains the actual link from the gamer to the different rosters (gamers can be on multiple rosters) gameinfo contains basic information about the games (ie name and platform) platform info contains information about the different platforms the games are played on (it is possible for a game to be played on multiple platforms) I am pretty new to SQL queries involving JOINs and UNIONs and such, usually I would just break it up into multiple queries but I thought there has to be a better way, so after looking around the net, I couldn't find (or maybe I just couldn't understand what I was looking at) what I was looking for. If anyone can point me in the right direction I would be most grateful.

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• Can you make a python script behave differently when imported than when run directly?

  - by futuraprime

  I often have to write data parsing scripts, and I'd like to be able to run them in two different ways: as a module and as a standalone script. So, for example: def parseData(filename): # data parsing code here return data def HypotheticalCommandLineOnlyHappyMagicFunction(): print json.dumps(parseData(sys.argv[1]), indent=4) the idea here being that in another python script I can call import dataparser and have access to dataParser.parseData in my script, or on the command line I can just run python dataparser.py and it would run my HypotheticalCommandLineOnlyHappyMagicFunction and shunt the data as json to stdout. Is there a way to do this in python?

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• How can I write Join statements on dataset..

  - by Preetham

  How can I write Join statements on dataset.. I have data in xml format..I can load that data into a dataset.. but how do i fetch data from two datatables using a join query

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• How do I secure a .NET Web Service for use by an iPhone application?

  - by David A Gibson

  Hello, The title says it all, I have a Web Service written in .NET that provides data for an iPhone application. It will also allow the application make a "reservation." Currently it's all internal to the corporate network but obviously when the iPhone application is published I will need ensure the Web Service is available externally. How would I go about securing the Web Service? There are two aspects I'm looking into: Authentication for accessing the web service Protection for the data being transferred I'm no so bothered about the data being passed back and forth as it will be viewable in the application anyway (which will be free). The key issue for me is preventing users from accessing the Web Service and making reservations themselves. At the moment I am considering encrypting any strings in the XML data passed back and forth so only the client can effectively use the web service sidestepping the need for authentication and providing protection for the data. This is the only model I have seen but I think the overheads on the iPhone and even for the web service make for a poor user experience. Any solutions at all would be most welcome? Thanks

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• Changing the value of datagridComboBoxColumn on checking/unchecking of check boxes in datagridcheckb

  - by MD

  I have a wpf data grid,where there are two data template columns One of which ahs check box as the data template adn teh other has combo box as the data template. Now my requirement is,i need to disable few of the options in the combo boxes depending on the check box checked or unchecked for each individual rows... With the cod etaht i ahve tried,i am able to change teh values of teh combo boxes,but it changes for the whole column and not fro individual rows.. Please let me kneo how to determine the combo boxes for the corresponding check boxes in a particular row.

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