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  • SPARC T4-4 Delivers World Record First Result on PeopleSoft Combined Benchmark

    - by Brian
    Oracle's SPARC T4-4 servers running Oracle's PeopleSoft HCM 9.1 combined online and batch benchmark achieved World Record 18,000 concurrent users while executing a PeopleSoft Payroll batch job of 500,000 employees in 43.32 minutes and maintaining online users response time at < 2 seconds. This world record is the first to run online and batch workloads concurrently. This result was obtained with a SPARC T4-4 server running Oracle Database 11g Release 2, a SPARC T4-4 server running PeopleSoft HCM 9.1 application server and a SPARC T4-2 server running Oracle WebLogic Server in the web tier. The SPARC T4-4 server running the application tier used Oracle Solaris Zones which provide a flexible, scalable and manageable virtualization environment. The average CPU utilization on the SPARC T4-2 server in the web tier was 17%, on the SPARC T4-4 server in the application tier it was 59%, and on the SPARC T4-4 server in the database tier was 35% (online and batch) leaving significant headroom for additional processing across the three tiers. The SPARC T4-4 server used for the database tier hosted Oracle Database 11g Release 2 using Oracle Automatic Storage Management (ASM) for database files management with I/O performance equivalent to raw devices. This is the first three tier mixed workload (online and batch) PeopleSoft benchmark also processing PeopleSoft payroll batch workload. Performance Landscape PeopleSoft HR Self-Service and Payroll Benchmark Systems Users Ave Response Search (sec) Ave Response Save (sec) Batch Time (min) Streams SPARC T4-2 (web) SPARC T4-4 (app) SPARC T4-2 (db) 18,000 0.944 0.503 43.32 64 Configuration Summary Application Configuration: 1 x SPARC T4-4 server with 4 x SPARC T4 processors, 3.0 GHz 512 GB memory 5 x 300 GB SAS internal disks 1 x 100 GB and 2 x 300 GB internal SSDs 2 x 10 Gbe HBA Oracle Solaris 11 11/11 PeopleTools 8.52 PeopleSoft HCM 9.1 Oracle Tuxedo, Version 10.3.0.0, 64-bit, Patch Level 031 Java Platform, Standard Edition Development Kit 6 Update 32 Database Configuration: 1 x SPARC T4-4 server with 4 x SPARC T4 processors, 3.0 GHz 256 GB memory 3 x 300 GB SAS internal disks Oracle Solaris 11 11/11 Oracle Database 11g Release 2 Web Tier Configuration: 1 x SPARC T4-2 server with 2 x SPARC T4 processors, 2.85 GHz 256 GB memory 2 x 300 GB SAS internal disks 1 x 100 GB internal SSD Oracle Solaris 11 11/11 PeopleTools 8.52 Oracle WebLogic Server 10.3.4 Java Platform, Standard Edition Development Kit 6 Update 32 Storage Configuration: 1 x Sun Server X2-4 as a COMSTAR head for data 4 x Intel Xeon X7550, 2.0 GHz 128 GB memory 1 x Sun Storage F5100 Flash Array (80 flash modules) 1 x Sun Storage F5100 Flash Array (40 flash modules) 1 x Sun Fire X4275 as a COMSTAR head for redo logs 12 x 2 TB SAS disks with Niwot Raid controller Benchmark Description This benchmark combines PeopleSoft HCM 9.1 HR Self Service online and PeopleSoft Payroll batch workloads to run on a unified database deployed on Oracle Database 11g Release 2. The PeopleSoft HRSS benchmark kit is a Oracle standard benchmark kit run by all platform vendors to measure the performance. It's an OLTP benchmark where DB SQLs are moderately complex. The results are certified by Oracle and a white paper is published. PeopleSoft HR SS defines a business transaction as a series of HTML pages that guide a user through a particular scenario. Users are defined as corporate Employees, Managers and HR administrators. The benchmark consist of 14 scenarios which emulate users performing typical HCM transactions such as viewing paycheck, promoting and hiring employees, updating employee profile and other typical HCM application transactions. All these transactions are well-defined in the PeopleSoft HR Self-Service 9.1 benchmark kit. This benchmark metric is the weighted average response search/save time for all the transactions. The PeopleSoft 9.1 Payroll (North America) benchmark demonstrates system performance for a range of processing volumes in a specific configuration. This workload represents large batch runs typical of a ERP environment during a mass update. The benchmark measures five application business process run times for a database representing large organization. They are Paysheet Creation, Payroll Calculation, Payroll Confirmation, Print Advice forms, and Create Direct Deposit File. The benchmark metric is the cumulative elapsed time taken to complete the Paysheet Creation, Payroll Calculation and Payroll Confirmation business application processes. The benchmark metrics are taken for each respective benchmark while running simultaneously on the same database back-end. Specifically, the payroll batch processes are started when the online workload reaches steady state (the maximum number of online users) and overlap with online transactions for the duration of the steady state. Key Points and Best Practices Two Oracle PeopleSoft Domain sets with 200 application servers each on a SPARC T4-4 server were hosted in 2 separate Oracle Solaris Zones to demonstrate consolidation of multiple application servers, ease of administration and performance tuning. Each Oracle Solaris Zone was bound to a separate processor set, each containing 15 cores (total 120 threads). The default set (1 core from first and third processor socket, total 16 threads) was used for network and disk interrupt handling. This was done to improve performance by reducing memory access latency by using the physical memory closest to the processors and offload I/O interrupt handling to default set threads, freeing up cpu resources for Application Servers threads and balancing application workload across 240 threads. See Also Oracle PeopleSoft Benchmark White Papers oracle.com SPARC T4-2 Server oracle.com OTN SPARC T4-4 Server oracle.com OTN PeopleSoft Enterprise Human Capital Management oracle.com OTN PeopleSoft Enterprise Human Capital Management (Payroll) oracle.com OTN Oracle Solaris oracle.com OTN Oracle Database 11g Release 2 Enterprise Edition oracle.com OTN Disclosure Statement Oracle's PeopleSoft HR and Payroll combined benchmark, www.oracle.com/us/solutions/benchmark/apps-benchmark/peoplesoft-167486.html, results 09/30/2012.

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  • Lost website rankings as a result of using a 302 redirect instead of a 301

    - by george peris
    I have an online store and during the last 2 days I noticed a big change in its SERPS for some keywords. The site is indexed in local Google for 5 keywords, and the online store is based on Magento 1.7. 5 days ago, I set up an SSL certificate in the online store in order to get better ranking results. I setup the SSL and followed the instructions from the Magento to make permanent 301 redirects from the HTTP URLs to the HTTPS URLs. I replaced all the URLs of the online store with HTTPS. When I saw in the SERPS that the rankings for some keywords were going up and down, I checked some URLs to see if all was going well with 301 redirects and found that the redirects where 302 and not 301, which is a big bug caused by Magento. I solved the problem with the .htaccess, but still the rankings for the homepage have disappeared. I fetched the site again using Google Webmaster Tools and am waiting to see. Can you please advise if I did something wrong, and what else I could do?

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  • How properly perform passing operation result to View

    - by atomAltera
    I'm developing web site on self made MVC engine. I have actionController that handles operations like register, login, post submit and etc. actionController receives operation name and parameters. Of course it mast handle errors such user with same nick already exists or password is to short about which action handler have to notify user. The question is which is the best way to organize errors, such that View could easily get localized user notification message. I see two ways First one: define error constants like ERR_NICK_BUSY = '1' ERR_NICK_INVALID = '2' ... and localization map local[ERR_NICK_BUSY] = 'User with the same nick already registered' local[ERR_NICK_INVALID ] = 'Nick, you entered is invalid' ... And second one: define abstract constants like ERR_FIELD_BUSY = '1' ERR_FIELD_INVALID = '2' ... and pass them with field name. In this case localization looks like local['nick_'+ERR_FIELD_BUSY] = 'User with the same nick already registered' ... I don't like both this methods. Can you advise something else?

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  • How do I handle 3rd party search result data (via cache)

    - by reikyoushin
    I have a search function on my site and it is taking data from 6 different 3rd party resources. The problem is, it takes too long requesting the data over and over again on the results page. I've read for questions like this on SO about session not being a good choice but for me 'memcache' is not an option, because the server doesn't have memcached installed and I have no way to install it now. Is there any other approach to do this? Storing in the database seem inappropriate because the data depends on the search terms requested. What I've been thinking is writing a file on the server that would act as a cache for this file but I don't know how I would know when to delete it after.

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  • SQL Contest – Result of Cartoon Contest

    - by pinaldave
    Earlier we had an excellent contest ran with the help of Embarcadero Technologies. We had two different contests on the same day sponsored by the kind folks at Embarcadero. Here are the details of the winners. 1) Win USD 25 Amazon Gift Cards (10 Units) We had announced that we will award USD 25 Amazon Gift Cards to 10 lucky winners who will download the DB Optimizer between Nov 29 to Dec 8. Here is the name of the winners. Winners will get Amazon Gift Cards USD 25 in the next 5 days of this blog post to their registered email address. If you do not receive the card, do send me email (Pinal at sqlauthority.com) and I will follow up on the details. Name of the winners: Ramdas Narayanan Krishna Uppuluri Donna Kray Santosh Gupta Robert Small Samit Bhatt Bernd Baumanns Rodrigo Oriola Jim Woodin Alfred Sandou 2) Win Star Wars R2-D2 Inflatable R/C We had cartoon contest. If you have not read the cartoon – I suggest you go over this cartoon story one more time. The task was to give the correct answer with some interesting note along with it. We selected a few good quotes and put them together. We later on picked the winner by using random algorithm. The winner gets fantastic Star Wars R2-D2 Inflatable R/C. Name of the winner: Aadhar Joshi. He wins R2-D2. You can read his comment over here. Thank you all for participating in the contest – this was fun – if you have liked it do let me know and we will come up with something new for you next time. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • RewriteRules targeting a directory result in a gratuitous redirect

    - by MapDot
    I have a standard CMS-like RewriteRule set up in my .htaccess: RewriteRule ^(.+)$ index.php?slug=$1 Let's say I have a directory called "foo" in the root directory. For some reason, if you hit the page it causes a redirect: http://www.mysite.com/foo -- http://www.mysite.com/foo?slug=foo Removing the directory fixes the problem, but unfortunately, it's not an option. Does anyone know of a workaround?

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  • Adding my face to my web-site in Google's search result

    - by Roman Matveev
    I'm trying to accomplish the rich snippet to the template of my future web-site. The data format is review and I used the microdata formatting to add all necessary information to the web-page. The Structured Data Testing Tool delivered rating, author information and review date: However there is no my face image and the sections related to authorship are empty: I made all that recommended to link my Google+ profile to the web-site: I did something wrong? Or I will not be able to see my face in the test tools ever and it will be in the real SERP?

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  • Faulty memtest result

    - by dhojgaard
    I've been a bit suspicious about my RAM lately. They seem not work like i expect them to. For instance i run a lot of Virtual Test Environments in VMware Workstation and lately Ubuntu starts to lag just running 4 virtual machines each dedicated 512 MB. BTW im having 6GB memory on my laptop. This did not use to be a problem for me on my last laptop that even had a lot lower CPU resources. So i was led to try a memtest after reading some websites about RAM testing. So i did a memtest overnight but when i woke up this morning i was just looping and i could not Exit or do anything. It was just looping the number of errors besides test 7 which you can see in the lower right part of the screenshot. Can anyone interpret this screenshot for me? Do i have a faulty set of RAMs?

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  • PASS Summit Location follow up - result analysis

    - by simonsabin
    I've had a chance to look at the results directly and it is clear that there is a tough choice. On the one hand people are saying that they prefer to have PASS put their money into chapters and things like 24hrs of PASS rather than an event on the east coast. Whilst at the same time almost 50% more people said they would be more likely to attend an East Coast event than a Seattle event, and 60% more said they would be more likley to attend a US Central region event. Whats more 60% said that the summit should be outside of Seattle every other year with only 19% saying it should always stay in Seattle. So clearly there is a huge desire for a non Seattle event. Looking at the other reasons for keeping in Seattle and the big one being that people want Microsoft speakers. More people think its somewhat important of very important that the conference is in walking distance of the hotels and restaurants. Essentially the Q6 questions show an even balance for normal conference, highlighting that they are prepared to travel, not with the family and they want a well laid out conference. Whats very annoying is that the questions, as people have commented, were biased towards certain answers. For instance there was no option about whether people feel its important to have industry leading speakers, MVPs etc at the conference. Only questions about Microsoft speakers. I know survey writing is very difficult to avoid biasing the answers one way or another. There was also no choice to show peoples preference, would people prefer Microsoft speakers or the summit to be held on the East Coast/Central US. I also find it amazing that people prefer hundres of developers rather than the SQLCAT and CSS teams, surely that indicates another issue about a lack of understanding of what the these teams do. All in all it is clear that people showed they want an event outside of Seattle and don't want PASS to be putting money into that instead of into other community activites. I find it suprising that there appears to have been a huge weighting against certain questions which have prioritised them over the huge desire for a PASS summit outside of Seattle. Lets see where we will be in 2013 or maybe they will rethink 2012 who knows.

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  • wrong SEO result for staging website

    - by OCD
    Hi, We have a domain with URL, lets say: http://www.xxxxstaging.com/abc.php?id=10 which is having a pretty good ranking for some keywords in google. However, this is our staging website and due to some historical reason, it was exposed to public. Now we have a production domain (the one we want to be publicly available), say: http://www.xxxxproduction.com/abc.php?id=10 which have exactly the same html output as xxxxstaging.com our question is, for the exactly same keyword search, it never appear in any page of google. Is it possible for us to "switch" the ranking in google, either tell the robot that they are indeed the same website, or tell google to change it for us? Thank you.

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  • SSIS Basics: Using the Execute SQL Task to Generate Result Sets

    The Execute SQL Task of SSIS is extraordinarily useful, but it can cause a lot of difficulty for developers learning SSIS, or only using it occasionally. What it needed, we felt, was a clear step-by-step guide that showed the basics of how to use it effectively. Annette Allen has once again cleared the fog of confusion. NEW! Take the stress out of .NET deploymentEliminate the risk in deploying manually to live systems using Deployment Manager, the new tool from Red Gate. Try it now.

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  • Conventions for search result scoring

    - by DeaconDesperado
    I assume this type of question is more on-topic here than on regular SO. I have been working on a search feature for my team's web application and have had a lot of success building a multithreaded, "divide and conquer" processing system to work through a large amount of fulltext. Our problem domain is pretty specific. Users of the app generate posts, and as a general rule, posts that are more recent are considered to be of greater relevance. Some of the data we are trying to extract from search is very specific (user's feelings about specific items or things) and we are using python nltk to do named-entity extraction to find interesting likely query terms. Essentially we look for descriptive adjective-noun pairs and generate a general picture of a user's expressed sentiment as a list of tokens. This search is intended as an internal tool for our team to draw out a local picture of sentiments like "soggy pizza." There's some machine learning in there too to do entity resolution on terms like "soggy" to all manner of adjectives expressing nastiness. My problem is I am at a loss for how to go about scoring these results. The text being searched is split up into tokens in a list, so my initial approach would be to normalize a float score between 0.0-1.0 generated off of how far into the list the terms appear and how often they are repeated (a later mention of the term being worth less, earlier more, greater frequency-greater score, etc.) A certain amount of weight could be given to the timestamp as well, though I am not certain how to calculate this. I am curious if anyone has had to solve a similar problem in a search relevance grading between appreciable metrics (frequency, term location/colocation, recency) and if there are and guidelines for how to weight each. I should mention as well that the final fallback procedure in the search is to pipe the query to Sphinx, which has its own scoring practices. Sphinx operates as the last resort in case our application specific processing can't find any eligible candidates.

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  • FBO rendering different result between Glaxay S2 and S3

    - by BruceJones
    I'm working on a pong game and have recently set up FBO rendering so that I can apply some post-processing shaders. This proceeds as so: Bind texture A to framebuffer Draw balls Bind texture B to framebuffer Draw texture A using fade shader on fullscreen quad Bind screen to framebuffer Draw texture B using normal textured quad shader Neither texture A or B are cleared at any point, this way the balls leave trails on screen, see below for the fade shader. Fade Shader private final String fragmentShaderCode = "precision highp float;" + "uniform sampler2D u_Texture;" + "varying vec2 v_TexCoordinate;" + "vec4 color;" + "void main(void)" + "{" + " color = texture2D(u_Texture, v_TexCoordinate);" + " color.a *= 0.8;" + " gl_FragColor = color;" + "}"; This works fine with the Samsung Galaxy S3/ Note2, but cause a strange effect doesnt work on Galaxy S2 or Note1. See pictures: Galaxy S3/Note2 Galaxy S3/Note2 Galaxy S2/Note Galaxy S2/Note Can anyone explain the difference?

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  • FBO rendering different result between Galaxy S2 and S3

    - by BruceJones
    I'm working on a pong game and have recently set up FBO rendering so that I can apply some post-processing shaders. This proceeds as so: Bind texture A to framebuffer Draw balls Bind texture B to framebuffer Draw texture A using fade shader on fullscreen quad Bind screen to framebuffer Draw texture B using normal textured quad shader Neither texture A or B are cleared at any point, this way the balls leave trails on screen, see below for the fade shader. Fade Shader private final String fragmentShaderCode = "precision highp float;" + "uniform sampler2D u_Texture;" + "varying vec2 v_TexCoordinate;" + "vec4 color;" + "void main(void)" + "{" + " color = texture2D(u_Texture, v_TexCoordinate);" + " color.a *= 0.8;" + " gl_FragColor = color;" + "}"; This works fine with the Samsung Galaxy S3/ Note2, but cause a strange effect doesnt work on Galaxy S2 or Note1. See pictures: Galaxy S3/Note2 Galaxy S3/Note2 Galaxy S2/Note Galaxy S2/Note Can anyone explain the difference?

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  • Subdomain takes the position of main site in Google search result

    - by user3578586
    We have one domain and one sub-domain. Until last week both of them appear in first page of Google search for very important keyword. Unfortunately Google dropped our main domain from search results. our main site has been in first page for 5 years! About one year ago we build this sub-domain. It simply has been redirected to one of pages of main domain. For solving problem we upload a independent site for sub-domain because we guessed that Google think this is our main page of our site. But problem did not solved. What should we do? our main site offer main services and we we want that will be on first page. Shout down sub-domain? Redirect to main site? Put the link of our main site in sub-domain? (About one year ago we put link of this sub-domain to our main site. Google indexed it and continuously bring that to top.) changing in robots.txt ....

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  • A Brand-new Automated Testing Tool is the Result of Telerik and ArtOfTest Merger

    Im sure youve already heard the great news about Telerik expansion and the new Telerik Automated Testing Tools division. I am excited to share what we worked on and produced for the last couple of months. New Release The latest Telerik release that went live this week added a completely new tool to Teleriks automated testing product line. The new QA Edition is tailored for QA Professionals. The QA Edition is a standalone tool that allows QAs to freely create, execute and maintain their tests without having to install Visual Studio. If you are a developer and you want something much faster and lightweight than VS, then the Standalone tool is worth trying. New IDE The QA Edition is a WPF application with interface built on top of the latest and greatest RadControls for WPF. This allowed us to configure and build intuitive and easy-to-use UI. Additionally, the rich ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Search Result Organization

    - by Vecta
    I'm creating an AJAX live search on a website I'm working on. Users will select values from a few dropdowns and a list of products will be returned based on what they select. Some possible fields would be: color, model, make, etc. What type of organization of search results do users tend to find most useful? Is it better to lump them all together (alphabatized) or is it more useful to lump them together by make? In the past I've tended to group them by "make" but I'm not concerned that this will continually force some items with a make toward the end of the alphabet always to the bottom of the list. Any tips are greatly appreciated.

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  • SEO Influenc search result per device class (mobile/desktop)

    - by user32224
    We're currently building a new responsive website and while working on the site map figured that we don't want to show certain sections on mobile devices. This can be easily done by hiding the navigation parts using css/media queries. However, trouble is that the hidden sites would still show up in search engines' search results. If a user happens to click on one of these links she might happen to see a badly formatted page as we'd use desktop/tablet only code to show images and video. Is there any way to "influence" to exclude certain pages if the search is done on a mobile device? Do search engines crawl pages once or with a device specific view twice? Could we set a noindex meta tag for a specific device class?

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  • How to improve a single-paged site search result [closed]

    - by Trisism
    Possible Duplicate: How to SEO a Single-Page website I created an online CV of mine a couple of weeks ago and it has had quite a few visits. Now I want to improve the chance it will appear in google search results; however, my web CV is a one-paged site and it contains only internal links (those with hash #) so I can't really submit a sitemap. I could have changed the internal links to normal links to be processed on server-side, but there's no point of doing so. I'm very new to web SEO so I would really appreciate if somebody can show me what should I do with a single-paged site with internal links to be effectively indexed by crawlers.

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  • remove "items 1-9 of X" from google result

    - by OSdave
    the results of my Magento based website's categories includes "items 1 - 9 of X" before the actual description of the category. How can I get rid of this? In this snapshot, what I want to delete is the red rectangle edits: @Su, these are the reason: Having text like (Items 1 - 9 of 144 –) appear in a Google listing uses up the 25 word limit that Google allows us. More importantly, the first few words of the description can persuade or dissuade someone from visiting my site. This text will not positively influence people to visit my site. @DisgruntledGoat this information shows up in the source code of that page, like this: <table class="toolbar" border="0"> <tr> <td class="pager" style="width: 414px;"> <table class="pager" cellspacing="0"> <tr> <td>Items 1 to 9 of 144 total</td> </tr> </table> </td> </tr> </table>

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  • Picking Apart a Google Search Result

    Search results aren't just ten blue lines any more. In Google especially they have gotten more crowded as they attempt to satisfy both users queries and the advertisers need to be shown in front of those users. If you are paying for an SEO campaign or any other kind of internet marketing it's important to know your sponsored from your organic listings.

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  • c# opennetCF background worker - e.result gives a ObjectDisposedException

    - by ikky
    Hi! I'm new working with background worker in C#. Here is a class, and under it, you will find the instansiation of it, and under there i will define my problem for you: I have the class Drawing: class Drawing { BackgroundWorker bgWorker; ProgressBar progressBar; Panel panelHolder; public Drawing(ref ProgressBar pgbar, ref Panel panelBig) // Progressbar and panelBig as reference { this.panelHolder = panelBig; this.progressBar = pgbar; bgWorker = new BackgroundWorker(); bgWorker.WorkerReportsProgress = true; bgWorker.WorkerSupportsCancellation = true; bgWorker.DoWork += new OpenNETCF.ComponentModel.DoWorkEventHandler(this.bgWorker_DoWork); bgWorker.RunWorkerCompleted += new OpenNETCF.ComponentModel.RunWorkerCompletedEventHandler(this.bgWorker_RunWorkerCompleted); bgWorker.ProgressChanged += new OpenNETCF.ComponentModel.ProgressChangedEventHandler(this.bgWorker_ProgressChanged); } public void createDrawing() { bgWorker.RunWorkerAsync(); } private void bgWorker_DoWork(object sender, DoWorkEventArgs e) { Panel panelContainer = new Panel(); // Adding panels to the panelContainer for(i=0; i<100; i++) { Panel panelSubpanel = new Panel(); // Setting size, color, name etc.... panelContainer.Controls.Add(panelSubpanel); // Adding the subpanel to the panelContainer //Report the progress bgWorker.ReportProgress(0, i); // Reporting number of panels loaded } e.Result = imagePanel; // Send the result(a panel with lots of subpanels) as an argument } private void bgWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) { this.progressBar.Value = (int)e.UserState; this.progressBar.Update(); } private void bgWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { if (e.Error == null) { this.panelHolder = (Panel)e.Result; } else { MessageBox.Show("An error occured, please try again"); } } } Instansiating an object of this class: public partial class Draw: Form { public Draw() { ProgressBar progressBarLoading = new ProgressBar(); // Set lots of properties on progressBarLoading Panel panelBigPanelContainer = new Panel(); Drawing drawer = new Drawing(ref progressBarLoading, ref panelBigPanelContainer); drawer.createDrawing(); // this makes the object start a new thread, loading all the panels into a panel container, while also sending the progress to this progressbar. } } Here is my problem: In the private void bgWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) i don't get the e.Result as it should be. When i debug and look at the e.Result, the panel's properties have this exception message: '((System.Windows.Forms.Control)(e.Result)).ClientSize' threw an exception of type 'System.ObjectDisposedException' So the object gets disposed, but "why" is my question, and how can i fix this? I hope someone will answer me, this is making me crazy. Another question i have: Is it allowed to use "ref" with arguments? is it bad programming? Thanks in advance. I have also written how i understand the Background worker below here: This is what i think is the "rules" for background workers: bgWorker.RunWorkerAsync(); => starts a new thread. bgWorker_DoWork cannot reach the main thread without delegates - private void bgWorker_DoWork(object sender, DoWorkEventArgs e) { // The work happens here, this is a thread that is not reachable by the main thread e.Result => This is an argument which can be reached by bgWorker_RunWorkerCompleted() bgWorker.ReportProgress(progressVar); => Reports the progress to the bgWorker_ProgressChanged() } - private void bgWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) { // I get the progress here, and can do stuff to the main thread from here (e.g update a control) this.ProgressBar.Value = e.ProgressPercentage; } - private void bgWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { // This is where the thread is completed. // Here i can get e.Result from the bgWorker thread // From here i can reach controls in my main thread, and use e.Result in my main thread if (e.Error == null) { this.panelTileHolder = (Panel)e.Result; } else { MessageBox.Show("There was an error"); } }

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  • how to get the result query one by one in jsp and mysql

    - by user261002
    I am trying to implement as Online Mock exam in JSP, but I have a problem to get the questions one by one, it get connceted for the first time, and show me the first question and answers, but when I click on "next" again, it still show me the first question, I think by clicking on "next" it start querying again. please help me. this is my bean : database.SQLSelectStatement sqlselect; database.SQLSelectStatement sqlselect2; static ResultSet questions; static ResultSetMetaData rsm; static ResultSet answers; public void setConnection() throws SQLException { if (database.DatabaseManager.getInstance().connectionOK()) { sqlselect = new database.SQLSelectStatement("question", "question", "0"); sqlselect2 = new database.SQLSelectStatement("answers", "question_id", "0"); questions = sqlselect.executeWithNoCondition(); } } public int i=0; public String getQuestions() throws SQLException { String result = ""; rsm = questions.getMetaData(); for (int i = 0; i < rsm.getColumnCount(); i++) { result += "<th>" + rsm.getColumnName(i + 1) + "</th>"; } if (!questions.isLast()) { questions.next(); System.out.println(i+1); result += "<tr>"; result += "<td>" + questions.getInt(1) + "</td>"; result += "<td>" + questions.getString(2) + "</td>"; result += "</tr>"; result += "<tr>"; sqlselect2.setValue(String.valueOf(questions.getInt(1))); answers = sqlselect2.Execute(); while (answers.next()) { result += "<tr> <td colspan='2'><input type='radio' name='answer' value='" + answers.getString(2) + "'> " + answers.getString(2) + "</td></tr>"; } result += "</tr>"; answers.close(); } return result; } this is the HTML: <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <h1>JSP Page</h1> <jsp:useBean id="exam" class="exam.ExamQuestions"></jsp:useBean> <% exam.setConnection(); %> <form method="post"> <table > <%=exam.getQuestions()%> </table> <input type="submit" name="action" value="next"/> </form> <% String action = request.getParameter("action"); if ("next".equals(action)) { out.println(request.getParameter("answer")); } %> </body> </html>

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