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• Which topics should be covered in a basic undergraduate C++ course?

  - by Gulshan

  I have a young lecturer friend who is going to teach the undergraduate C++ course in CS. He asked me for some suggestions regarding how the course should be organized. Now I am asking you. I have seen many trends in universities which leads to a nasty experience of C++. So, please suggest from a professional programmer's point of view. For your information, the students going to take the course, have taken course like "Introduction to programming with C" in previous semester.

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• How to correct Google Earth's "invalid HTTP request" notice?

  - by Hejar Mukriyani

  I am running Ubuntu 12.04. As you might know Google Earth 7 doesn't work in Ubuntu 12.04 yet. I installed Google Earth via make-googleearth-package --force command. My installation was saccesful. At the beginning everything was working fine. But after some days I had a problem. When I type in "Fly to" box a city I wanted to search for it. It gives me "invalid HTTP request" error as seen in the picture: How to solve? P.S: I removed and reinstalled it but problem still consists. I can search globe via mouse only.

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• SharePoint 2010 Hosting :: HTTP Error 503. The Service in Unavailable.

  - by mbridge

  Error Message: HTTP Error 503. The service in unavailable. The application pool is shutdown and the Event Viewer indicates: Log Name:      Application Source:        Microsoft-Windows-User Profiles Service Date:          4/24/2010 4:58:28 PM Event ID:      1500 Task Category: None Level:         Error Keywords: User:          GUERILLA\spapppool Computer:      SPS2010RTM.guerilla.local Description: Windows cannot log you on because your profile cannot be loaded. Check that you are connected to the network, and that your network is functioning correctly. DETAIL – Unspecified error Solution: Option 1 – Log on locally with the service account once to create a local profile for it. Option 2 - Modify the application pool by going into IIS > Application Pools > Right-Click offending app pool > Advanced Settings > Set “Load User Profile” to False. Give it try!! Good luck!!

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• How do I work around sudo 'segmentation fault' on basic bash commands?

  - by sage

  I am sure the answers are out there, but alas there are too many answers (here and elsewhere) to other questions stopping me from finding them. I just encountered something substantially similar to what is described at the closed SO question, sudo : “segmentation fault” Ubuntu maverick [closed]. My team is using Ubuntu 11.04 on VMWare Workstation 8.0.4. We are doing development using c++, Xenomai, Qt, and Qt Creator. When we simulate our application on the virtual machine, we currently need to launch Qt Creator with sudo. My colleague mentioned today that he has been having issues where his workstation locks up and he needs to restart and that occasionally he has the issue that all sudo bash commands return "segmentation fault". I just ran our application in simulation mode. I was running Qt Creator under sudo and Qt Creator received the signal abort (if I recall). Afterward, every command executed with sudo from sudo qtcreator to sudo ls resulted in the message Segmentation fault. I clicked on the power widget to see if I could log out, but the system shut down straightaway without prompting. My understanding is that we run sudo because of a permissions issue with Xenomai and the VM as currently configured, but my colleague has a workaround for this. I expect that not running Qt Creator under sudo -- something that has always made me nervous -- will help contain this issue, but I find it troubling that this could happen and manifest as it does. Does anyone know what is happening? Any recommendations on how to work around this issue? This is happening often to I am trying tolobby for VM changes to be able to run the process without sudo.

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• What will be the impact on SEO if we remove our SSL certificate (url become http instead of https)?

  - by pixeline

  For some weird reason, our domain's content is returned for any https request set to any of our server's hosted domain names. https://domain.com leads to our website, with a proper SSL certificate (so, no warning). https://domain2.com, also hosted on our server but without SSL certificate, leads to a warning, and if accepted, to our website's content! The problem is that any search for our keywords in Google shows "fake websites" on top of ours, with the warning et al. It seems unsolvable so we are thinking about switching back ton nonsecure http . I'm just afraid of losing whatever indexing we have. How can i avoid that? Thanks, a.

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• set proxy for vpn server on ubuntu server 12.4

  - by Morteza Soltanabadiyan

  I have a vpn server with HTTPS, L2TP , OPENVPN , PPTP. i want to set proxy in the server so all connection that comes from vpn clients use the proxy that i set in my server. I made a bash script file for it , but proxy not working. gsettings set org.gnome.system.proxy mode 'manual' gsettings set org.gnome.system.proxy.http enabled true gsettings set org.gnome.system.proxy.http host 'cproxy.anadolu.edu.tr' gsettings set org.gnome.system.proxy.http port 8080 gsettings set org.gnome.system.proxy.http authentication-user 'admin' gsettings set org.gnome.system.proxy.http authentication-password 'admin' gsettings set org.gnome.system.proxy use-same-proxy true export http_proxy=http://admin:[email protected]:8080 export https_proxy=http://admin:[email protected]:8080 export HTTP_PROXY=http://admin:[email protected]:8080 export HTTPS_PROXY=http://admin:[email protected]:8080 Now , I don't know what to do to make a global proxy for server and all vpn clients use it automatically.

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• IIS throws HTTP Error 503. The service is unavailable after installation of windows 8

  - by Floran

  I was using IIS7.5 on Windows 7. Everything worked great. I then installed Windows 8. The shortcut link to my IIS7.5 stopped working, because all this was apparently moved to a windows.old folder. I had to install IIS8 via the 'turn Windows features on/off'. After I did that, I saw my sites again and everything looked ok, until I browsed to a site and got the error: Service Unavailable HTTP Error 503. The service is unavailable. I restarted IIS, restarted my PC, restarted the single site, but the problem remains. I also tried looking at the event logs. My eventlogs used to be in C:\inetpub\logs\LogFiles\W3SVC4, but I don't see any log of today in there. Maybe that has changed with the new IIS as well? If so, where are the eventlogs now or where can I see where they should be saved?

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• Should I use XNA (C#) or Java to create a basic game engine?

  - by Xboxking

  My project is to design and build a game engine (in just about 3 months). I've been looking at two options for this game engine, either make it with XNA (and C#) or Java. My experience with XNA/C# is zero to none, however I have been a Java programmer for around 4 years. I've had a little play around with both but I am still not sure what would be best to use (i.e. what would turn out better with my experience). XNA is obviously for making games and I would presume making a game engine would be slightly easier in this - however that said, there are numerous libraries available in Java that could be used for a game engine (such as lwjgl). What would be my best option and ideally produce the best results out of both XNA or Java? For your information, the game engine at the moment is a 2D one and is not too advanced (although I plan to extend it in the future). Thanks in advance for all answers!

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• How can I give a basic idea of what I'm working on to a non programmer?

  - by Jesse

  As a relatively new programmer (1 year professionally, many years as an amateur) I've run into many situations that sent me running to Stack Overflow for answers that failed my meagre experiences. Tonight I received the hardest question ever. My wife asked me: What are you working on? The questions is deceptive in it's simplicity. A straight forward and truthful answer of "I'm working on a c# class module for monitoring database delivery times" is sure incite suggestion of attempts to confuse. My second instinct was to suggest that it couldn't really be explained to a layperson, after very brief consideration I came to the conclusion that this would likely result in a long and sleepless night on the sofa. The end result was a muddled answer along the lines of "something to monitor automatic things to make sure they're delivered on time". The reception was fairly chilly, I had to make many assurances that I was not insulting her ample intelligence. My question is thus, what is the best way to discuss your work as a programmer with your significant other who is not.

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• Countdown to Transit of Venus and a List of Feeds

  - by TATWORTH

  At http://www.space.com/14568-venus-transits-sun-2012-skywatching.html there is a countdown to the transit of Venus.NASA will providing a video feed from Mauna Kea of the event from http://venustransit.nasa.gov/2012/transit/webcast.php.The SLOOH space camera site will provide a feed at http://www.slooh.com/transit-of-venus/Astronomers Without Borders will provide a feed from Mount Wilson at http://www.astronomerswithoutborders.org/projects/transit-of-venus.htmlOther web camera feeds are at:http://www.skywatchersindia.com/http://venustransit.nasa.gov/transitofvenus/http://venustransit.nso.edu/http://www.transitofvenus.com.au/HOME.htmlhttp://www.exploratorium.edu/venus/http://www.bareket-astro.com/live-astronomical-web-cast/live-free-venus-transit-webcast-6-june-2012.htmlhttp://cas.appstate.edu/streams/2012/05/physics-and-astronomy-astrocamhttp://skycenter.arizona.edu/

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• Basic procedural generated content works, but how could I do the same in reverse?

  - by andrew

  My 2D world is made up of blocks. At the moment, I create a block and assign it a number between 1 and 4. The number assigned to the nth block is always the same (i.e if the player walks backwards or restarts the game.) and is generated in the function below. As shown here by this animation, the colours represent the number. function generate_data(n) math.randomseed(n) -- resets the random so that the 'random' number for n is always the same math.random() -- fixes lua random bug local no = math.random(4) --print(no, n) return no end Now I want to limit the next block's number - a block of 1 will always have a block 2 after it, while block 2 will either have a block 1,2 or 3 after it, etc. Before, all the blocks data was randomly generated, initially, and then saved. This data was then loaded and used instead of being randomly called. While working this way, I could specify what the next block would be easily and it would be saved for consistency. I have now removed this saving/loading in favour of procedural generation as I realised that save whiles would get very big after travelling. Back to the present. While travelling forward (to the right), it is easy to limit what the next blocks number will be. I can generate it at the same time as the other data. The problem is when travelling backwards (to the left) I can not think of a way to load the previous block so that it is always the same. Does anyone have any ideas on how I could sort this out?

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• User generated content: a basic yet simple to use OR a complex yet powerful solution?

  - by ne5tebiu

  As stated above, which solution is better for a game based on user generated content? The simple solution (in-game editor) is great for gamers without experience in coding and etc. In this way every player could populate the game with content. But the content would be very limited. The complex solution would allow the content to be with almost no limitation but casual gamers probably couldn't make hardly any content at all. If both solutions are used, the quality behind the second solution would be more valuable than the first solution's quantity. However, making a powerful in-game editor could even take more time and manpower than the actual game and every gamer would have to learn how to use the new complex tool, understand it, and master it if he or she wants to make quality content.

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• What is the basic loadout for an open source web developer?

  - by DeveloperDon

  Thus far, I have mainly been an embedded developer, but I am interested in having the flexibility to do mobile and web development as well. I think my tools should include the following, but probably a lot more. LAMP stack. Java IDEs like Eclipse and IntelliJ. JS frameworks like Dojo, Node.JS, AngularJS, (is it better to mix or commit to one?). Cloud solutions like EC2 and Azure (again, ok to mix or better to commit to one?). Google APIs. Continuous integration server. Source control tools with Git for new work, SVN, CVS, +others for imports. FTP server. Unit test runners. Bug trackers. OOAD modeling tools or plug-ins? Graphic design tools? Hosting services. XML / JSON / other markup? Content management, SEO? I am also interested to know if there are tools where it might be better to mix, match, or support all available (maybe for source control) and others where the full focus should be on one (maybe Java vs. C# or Windows vs. Linux vs. MacOS). Perhaps some of these questions need context of whether the projects will be greenfield (just pick favorite) or maintenance (no choice, each project continues legacy, sometimes with a poor tools).

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• How do you keep your basic skills from atrophy?

  - by kojiro

  I've been programming for about 10 years, and I've started to migrate to more of a project management position. I still do coding, but less often now. One of the things that I think is holding me back in my career is that I can't "let go". I think I fear letting hard-won programming skills atrophy while I sit in meetings and annotate requirements. (Not to mention I don't trust people to write requirements who don't understand the code.) I can't just read books and magazines about coding. I'm involved in some open source projects in my free time, and stackoverflow and friends help a bit, because I get the opportunity to help people solve their programming problems without micromanaging, but neither of these are terribly structured, so it's tempting to work first on the problems I can solve easily. I guess what I'd like to find is a structured set of exercises (don't care what language or environment) that… …I can do periodically …has some kind of time requirement so I can tell if I've been goofing off …has some kind of scoring so I can tell if I'm making mistakes Is there such a thing? What would you do to keep your skills fresh?

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• DoNotTrack activé par défaut dans Internet Explorer 10, des annonceurs mécontents menacent de ne pas respecter l'en-tête HTTP

  [IMG]http://blog.developpez.com/media/5341.png[/IMG] La prochaine version du navigateur de Microsoft, Internet Explorer 10, sera intégrée dans Windows 8. Elle proposera la fonctionnalité DoNotTrack (DNT) et elle sera activée par défaut ! Brendon Lynch, le responsable de la vie privée, relaye cette annonce, faite le 31 mai par Microsoft, via son blog : "Les utilisateurs pourront changer ce paramètre, mais par défaut le signal DNT sera envoyé aux sites web que les utilisateurs visitent". Une affirmation claire ! Pour ceux qui ne la connaissent pas, la fonction DoNotTrack rajo...

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• Where can I train my game AI skills? (any upgoing competition?) [on hold]

  - by user1671710

  There are 2 main options - building AI plugin for existing game or entering to some competition. Do you have some concrete tips? Is there any competition which will be soon open? From my research, competitions: http://aichallenge.org (last 2011) http://www.battlecode.org (January 2014) http://webdocs.cs.ualberta.ca/~cdavid/starcraftaicomp/index.shtml (August 2014) http://aibirds.org (maybe summer 2014) http://www.marioai.org (last 2012) http://www.ice.ci.ritsumei.ac.jp/~ftgaic/index.htm (last 2013) http://www.pacman-vs-ghosts.net (last 2012) http://ai-contest2013.gameloft.com/index/contest (last 2013) http://www.botprize.org/ (last 2012) And maybe more. These are from quick research. Obviously there were many competitions this year but it is difficult to catch it. Main question is: Do you have any information of any currently running AI competition?

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• How to get HDMI sound work on a basic 12.04 install?

  - by Gubuntu

  I have just installed Ubuntu 12.04 (Precise) and am using it on my TV. The HDMI sound doesn't work. All I have installed is: The preinstalled codecs and other software, a KDE game called KsirK, Supertuxkart, and GIMP 2.8. I am using a custom built computer, and a LG TV. My processor is Pentium(R) Dual-Core CPU E5200 @ 2.50GHz dual core, OS is 32-bit, and I have 1.7GB of ram (after having to remove one stick due to failure).

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• Is "convention over configuration" not violating basic programming principles?

  - by Geerten

  I was looking at the WPF MVVM framework Caliburn.Micro and read that a lot of standard things are based on naming conventions. For example, automatic binding of properties in the View to properties in the ViewModel. Although this seems to be convenient (removes some boilerplate code), my first instinct reaction is that it isn't completely obvious to a new programmer that will read this code. In other words, the functionality of the application is not completely explained by its own code, but also by the documentation of the framework. EDIT: So this approach is called convention over configuration. Since I could not find any questions concerning this, I altered my question: My question is: Is convention over configuration a correct way of simplifying things, or is it violating some programming principles (and if so, which ones)?

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• Can I redirect the HTTP request towards an old folder to the homepage using .htaccess file?

  - by AndreaNobili

  I have to following situation: I had an old blog that was made using Joomla (this blog was indexed well enough by search engines). For some problems I delete it and I have create it again using WordPress. Now I have many visit (from Google) that leading to specific pages of the old site (pages that don't exist in the new version). For example I have visit to URL as: /scorejava/index.php/corso-spring-mvc/1-test that don't exist on my new site. I would know if using the .htaccess file (or other sistem) I can redirect the HTTP request directed to some subfolder (that don't exist in the new version) to the homepage of my new site. For example I have the request towards the void URL: /scorejava/index.php/corso-spring-mvc/1-test. And I would create a regular expression that say something like: all the request toward the subfolder corso-spring-mvc (and all it's content file and subfolder) have to be redirected to www.scorejava.com. Is it possible?

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• C Programming arrays, I dont understand how I would go about making this program, If anyone can just guide me through the basic outline please :) [on hold]

  - by Rashmi Kohli

  Problem The temperature of a car engine has been measured, from real-world experiments, as shown in the table and graph below: Time (min) Temperature (oC) 0 20 1 36 2 61 3 68 4 77 5 110 Use linear regression to find the engine’s temperature at 1.5 minutes, 4.3 minutes, and any other time specified by the user. Background In engineering, many times we measure several data points in an experiment, but then we need to predict a value that we have not measured which lies between two measured values, such as the problem statement above. If the relation between the measured parameters seems to be roughly linear, then we can use linear regression to find the relationship between those parameters. In the graph of the problem statement above, the relation seems to be roughly linear. Hence, we can apply linear regression to the above problem. Assuming y {y0, y1, …yn-1} has a linear relation with x {x0, x1, … xn-1}, we can say that: y = mx+b where m and b can be found with linear regression as follows: For the problem in this lab, using linear regression gives us the following line (in blue) compared to the measured curve (in red). As you can see, there is usually a difference between the measured values and the estimated (predicted) values. What linear regression does is to minimize those differences and still give us a straight line (blue). Other methods, such as non-linear regression, are also possible to achieve higher accuracy and better curve fitting. Requirements Your program should first print the table of the temperatures similar to the way it’s printed in the problem statement. It should then calculate the temperature at minute 1.5 and 4.3 and show the answers to the user. Next, it should prompt the user to enter a time in minutes (or -1 to quit), and after reading the user’s specified time it should give the value of the engine’s temperature at that time. It should then go back to the prompt. Hints •Use a one dimensional array to store the temperature values given in the problem statement. •Use functions to separate tasks such as calculating m, calculating b, calculating the temperature at a given time, printing the prompt, etc. You can then give your algorithm as well as you pseudo code per function, as opposed to one large algorithm diagram or one large sequence of pseudo code.

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• Should I use XNA (C#) or Java to create a basic game engine?

  - by Xboxking

  My project is to design and build a game engine (in just about 3 months). I've been looking at two options for this game engine, either make it with XNA (and C#) or Java. My experience with XNA/C# is zero to none, however I have been a Java programmer for around 4 years. I've had a little play around with both but I am still not sure what would be best to use (i.e. what would turn out better with my experience). XNA is obviously for making games and I would presume making a game engine would be slightly easier in this - however that said, there are numerous libraries available in Java that could be used for a game engine (such as lwjgl). What would be my best option and ideally produce the best results out of both XNA or Java? For your information, the game engine at the moment is a 2D one and is not too advanced (although I plan to extend it in the future). Thanks in advance for all answers!

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• nginx and proxy_hide_header

  - by giskard

  When I curl for a URL I get this answer back: > < HTTP/1.1 200 OK < Server: nginx/0.7.65 < Date: Thu, 04 Mar 2010 12:18:27 GMT < Content-Type: application/json < Connection: close < Expires: Thu, 04 Mar 2010 12:18:27 UTC < http.context.path: /1/ < jersey.response: com.sun.jersey.spi.container.ContainerResponse@17646d60 < http.custom.headers: {Content-Type=text/plain} < http.request.path: /2/messages/latest.json < http.status: 200 < Transfer-Encoding: chunked I want to remove < http.context.path: /1/ < jersey.response: com.sun.jersey.spi.container.ContainerResponse@17646d60 < http.custom.headers: {Content-Type=text/plain} < http.request.path: /2/messages/latest.json < http.status: 200 So I used the proxy_hide_header directive in this way: location / { if ($arg_id) { proxy_pass http..authorized; break; } proxy_pass http..anonymous; proxy_hide_header http.context.path; proxy_hide_header jersey.response; proxy_hide_header http.request.path; proxy_hide_header http.status ; } But it doesn't work. any clues?

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• Installing a .deb file manually?

  - by stef

  apt-get install gitosis --fix-missing on my Linode still leads to a 404 (Failed to fetch http://ftp.debian.org/debian/pool/main/g/gitosis/gitosis_0.2+20080825-2_all.deb 404 Not Found [IP: 130.89.148.12 80] ) . The correct file location seems to be http://ftp.debian.org/debian/pool/main/g/gitosis/gitosis_0.2+20090917-11_all.deb Is there any way I can install this without apt-get, or point apt-get in the right direction somehow? Several other packages on my Debian Linode also point to 404, both from command line and virtualmin. EDIT: Machine details Debian 5.0 64bit (Latest 2.6 (2.6.39.1-x86_64-linode19)) EDIT2 My sources list # main repo deb http://ftp.debian.org/debian/ lenny main contrib non-free deb-src http://ftp.debian.org/debian/ lenny main contrib non-free deb http://security.debian.org/ lenny/updates main contrib non-free deb-src http://security.debian.org/ lenny/updates main contrib non-free deb http://volatile.debian.org/debian-volatile lenny/volatile main contrib non-free deb-src http://volatile.debian.org/debian-volatile lenny/volatile main contrib non-free # contrib & non-free repos #deb http://ftp.debian.org/debian/ lenny contrib non-free #deb-src http://ftp.debian.org/debian/ lenny contrib non-free #deb http://security.debian.org/debian/ lenny/updates contrib non-free #deb-src http://security.debian.org/debian/ lenny/updates contrib non-free deb http://software.virtualmin.com/gpl/debian/ virtualmin-lenny main deb http://software.virtualmin.com/gpl/debian/ virtualmin-universal main

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• nginx: Rewrite PHP does not work

  - by Ton Hoekstra

  I've a Suffix Proxy installed and I'm using the following rewrite with wildcard subdomain DNS on: location / { if (!-e $request_filename) { rewrite ^(.*)$ /index.php last; break; } } My suffix proxy has the following URL format: (subdomain and/or domain + domain extension to proxy).proxy.org/(request-uri to proxy) I've this php code in my index.php: if(preg_match('#([\w\.-]+)\.example\.com(.+)#', $_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'], $match)) { header('Location: http://example.com/browse.php?u=http://'.$match[1].$match[2]); die; } But when requested a page with a .php extension I'll get a 404 not found error: http://www.php.net.proxy.org/docs.php - HTTP/1.1 404 Not Found http://www.utexas.edu.proxy.org/learn/php/ex3.php - HTTP/1.1 404 Not Found But everything else is working (also index.php is working): http://php.net.proxy.org/index.php - HTTP/1.1 200 OK http://www.php-scripts.com.proxy.org/php_diary/example2.php3 - HTTP/1.1 200 OK http://www.utexas.edu.proxy.org/learn/php/ex3.phps - HTTP/1.1 200 OK http://www.w3schools.com.proxy.org/html/default.asp - HTTP/1.1 200 OK Somebody has an answer? I don't know why it's not working, on apache it's working fine. Thanks in advance. I've removed the location and now it's working perfectly: if (!-e $request_filename) { rewrite ^(.*)$ /index.php last; break; }

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• Multiple database with Spring+Hibernate+JPA

  - by ziftech

  Hi everybody! I'm trying to configure Spring+Hibernate+JPA for work with two databases (MySQL and MSSQL) my datasource-context.xml: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"> <!-- Data Source config --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${local.jdbc.driver}" p:url="${local.jdbc.url}" p:username="${local.jdbc.username}" p:password="${local.jdbc.password}"> </bean> <bean id="dataSourceRemote" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${remote.jdbc.driver}" p:url="${remote.jdbc.url}" p:username="${remote.jdbc.username}" p:password="${remote.jdbc.password}" /> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="entityManagerFactory" /> <!-- JPA config --> <tx:annotation-driven transaction-manager="transactionManager" /> <bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager"> <property name="persistenceXmlLocations"> <list value-type="java.lang.String"> <value>classpath*:config/persistence.local.xml</value> <value>classpath*:config/persistence.remote.xml</value> </list> </property> <property name="dataSources"> <map> <entry key="localDataSource" value-ref="dataSource" /> <entry key="remoteDataSource" value-ref="dataSourceRemote" /> </map> </property> <property name="defaultDataSource" ref="dataSource" /> </bean> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" p:showSql="true" p:generateDdl="true"> </bean> </property> <property name="persistenceUnitManager" ref="persistenceUnitManager" /> <property name="persistenceUnitName" value="localjpa"/> </bean> <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> </beans> each persistence.xml contains one unit, like this: <persistence-unit name="remote" transaction-type="RESOURCE_LOCAL"> <properties> <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultNamingStrategy" /> <property name="hibernate.dialect" value="${remote.hibernate.dialect}" /> <property name="hibernate.hbm2ddl.auto" value="${remote.hibernate.hbm2ddl.auto}" /> </properties> </persistence-unit> PersistenceUnitManager cause following exception: Cannot resolve reference to bean 'persistenceUnitManager' while setting bean property 'persistenceUnitManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'persistenceUnitManager' defined in class path resource [config/datasource-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.TypeMismatchException: Failed to convert property value of type [java.util.ArrayList] to required type [java.lang.String] for property 'persistenceXmlLocation'; nested exception is java.lang.IllegalArgumentException: Cannot convert value of type [java.util.ArrayList] to required type [java.lang.String] for property 'persistenceXmlLocation': no matching editors or conversion strategy found If left only one persistence.xml without list, every works fine but I need 2 units... I also try to find alternative solution for work with two databases in Spring+Hibernate context, so I would appreciate any solution new error after changing to persistenceXmlLocations No single default persistence unit defined in {classpath:config/persistence.local.xml, classpath:config/persistence.remote.xml} UPDATE: I add persistenceUnitName, it works, but only with one unit, still need help UPDATE: thanks, ChssPly76 I changed config files: datasource-context.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${local.jdbc.driver}" p:url="${local.jdbc.url}" p:username="${local.jdbc.username}" p:password="${local.jdbc.password}"> </bean> <bean id="dataSourceRemote" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${remote.jdbc.driver}" p:url="${remote.jdbc.url}" p:username="${remote.jdbc.username}" p:password="${remote.jdbc.password}"> </bean> <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"> <property name="defaultPersistenceUnitName" value="pu1" /> </bean> <bean id="persistenceUnitManager" class="org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager"> <property name="persistenceXmlLocation" value="${persistence.xml.location}" /> <property name="defaultDataSource" ref="dataSource" /> <!-- problem --> <property name="dataSources"> <map> <entry key="local" value-ref="dataSource" /> <entry key="remote" value-ref="dataSourceRemote" /> </map> </property> </bean> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" p:showSql="true" p:generateDdl="true"> </bean> </property> <property name="persistenceUnitManager" ref="persistenceUnitManager" /> <property name="persistenceUnitName" value="pu1" /> <property name="dataSource" ref="dataSource" /> </bean> <bean id="entityManagerFactoryRemote" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" p:showSql="true" p:generateDdl="true"> </bean> </property> <property name="persistenceUnitManager" ref="persistenceUnitManager" /> <property name="persistenceUnitName" value="pu2" /> <property name="dataSource" ref="dataSourceRemote" /> </bean> <tx:annotation-driven /> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="entityManagerFactory" /> <bean id="transactionManagerRemote" class="org.springframework.orm.jpa.JpaTransactionManager" p:entity-manager-factory-ref="entityManagerFactoryRemote" /> </beans> persistence.xml <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> <persistence-unit name="pu1" transaction-type="RESOURCE_LOCAL"> <properties> <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultNamingStrategy" /> <property name="hibernate.dialect" value="${local.hibernate.dialect}" /> <property name="hibernate.hbm2ddl.auto" value="${local.hibernate.hbm2ddl.auto}" /> </properties> </persistence-unit> <persistence-unit name="pu2" transaction-type="RESOURCE_LOCAL"> <properties> <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.DefaultNamingStrategy" /> <property name="hibernate.dialect" value="${remote.hibernate.dialect}" /> <property name="hibernate.hbm2ddl.auto" value="${remote.hibernate.hbm2ddl.auto}" /> </properties> </persistence-unit> </persistence> Now it builds two entityManagerFactory, but both are for Microsoft SQL Server [main] INFO org.hibernate.ejb.Ejb3Configuration - Processing PersistenceUnitInfo [ name: pu1 ...] [main] INFO org.hibernate.cfg.SettingsFactory - RDBMS: Microsoft SQL Server [main] INFO org.hibernate.ejb.Ejb3Configuration - Processing PersistenceUnitInfo [ name: pu2 ...] [main] INFO org.hibernate.cfg.SettingsFactory - RDBMS: Microsoft SQL Server (but must MySQL) I suggest, that use only dataSource, dataSourceRemote (no substitution) is not worked. That's my last problem

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