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  • JPA: what is the proper pattern for iterating over large result sets?

    - by Caffeine Coma
    Let's say I have a table with millions of rows. Using JPA, what's the proper way to iterate over a query against that table, such that I don't have all an in-memory List with millions of objects? I suspect that the following will blow up if the table is large: List<Model> models = entityManager().createQuery("from Model m", Model.class).getResultList(); for (Model model : models) { // do something with model } Is pagination (looping and manually updating setFirstResult()/setMaxResult()) really the best solution?

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  • On Windows 7, how to check that applications are in the correct Program Files directory?

    - by Anon Guy
    In Windows 7, applications should be installed to "Program Files" or "Program Files (x86)" depending on whether they are 64-bit or 32-bit (respectively, as per this page). Is there an easy way to check that all the applications on my system are in the correct Program Files directory? To put it another way, is an easy way to detect any 32-bit applications in "Program Files" and 64-bit applications in "Program Files (x86)"?

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  • With Maven2, how would I zip a directory in my resources?

    - by Benny
    I'm trying to upgrade my project from using Maven 1 to Maven 2, but I'm having a problem with one of the goals. I have the following Maven 1 goal in my maven.xml file: <goal name="jar:init"> <ant:delete file="${basedir}/src/installpack.zip"/> <ant:zip destfile="${basedir}/src/installpack.zip" basedir="${basedir}/src/installpack" /> <copy todir="${destination.location}"> <fileset dir="${source.location}"> <exclude name="installpack/**"/> </fileset> </copy> </goal> I'm unable to find a way to do this in Maven2, however. Right now, the installpack directory is in the resources directory of my standard Maven2 directory structure, which works well since it just gets copied over. I need it to be zipped though. I found this page on creating ant plugins: http://maven.apache.org/guides/plugin/guide-ant-plugin-development.html. It looks like I could create my own ant plugin to do what I need. I was just wondering if there was a way to do it using only Maven2. Any suggestions would be much appreciated. Thanks, B.J.

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  • How do you redirect from one directory to another and maintain the proper basepath?

    - by codeninja
    I need to redirect all /eula traffic to /tos RewriteRule ^/eula/$ /tos [R=301,NC] but this rule doesnt seem to work -- mostly because the basepath is being treated as the root when really theres another parent directory; what's happening with the above rule is /my/docs/eula -> /tos which is not right, it should be doing this /my/docs/eula -> /my/docs/tos How do I write the rule for this, without having to specify what the parent dir is?

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  • How to give Apache access to files in my home directory?

    - by Mark Smith
    I'm a Ubuntu Linux user (Lucid Lynx) who is running Apache. I have a collection of zip files in a folder in my home directory (~/zip_files) which I would like to be able to link to through apache, such that when somebody who visits my website which I'm using Apache to host clicks a link to one of the zip files, he can download it through the web. How can I provide Apache with access to the files and set the permissions? Thanks, I'm new to linux!

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  • How to Prevent Spotlight from Indexing Non-Apps in /Applications Directory?

    - by Ross Charette
    The only thing I need indexed in the /Applications folder are the .app files. Is there any way to setup a filter to have mds or Spotlight ignore everything in /Applications except .apps? Otherwise, would it be possible to setup a rule for Alfred to omit any non-.app records from /Applications? I still want documents indexed and returned, just not from that specific directory. OS X 10.6.8 if you're wondering.

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  • How to block a specific site's directory in windows?

    - by Creedy
    How can I block a specific directory of a website as e.g. http://example.com/someSite unfortunately the hosts file is not an option since you can only block whole domains there and any "/" just destroys these rules. This is just for my personal protection against visiting some sites too often, while i still have to be able to get to the other sites of that domain (as e.g. example.com/someOtherSite) Would be great if someone knows a solution regarding this topic.

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  • How do I serve a large file using Pylons?

    - by Chris R
    I am writing a Pylons-based download gateway. The gateway's client will address files by ID: /file_gw/download/1 Internally, the file itself is accessed via HTTP from an internal file server: http://internal-srv/path/to/file_1.content The files may be quite large, so I want to stream the content. I store metadata about the file in a StoredFile model object: class StoredFile(Base): id = Column(Integer, primary_key=True) name = Column(String) size = Column(Integer) content_type = Column(String) url = Column(String) Given this, what's the best (ie: most architecturally-sound, performant, et al) way to write my file_gw controller?

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  • Solve:Value was either too large or too small for an Int32.

    - by jithincool
    I am passing query string and the url is as follows- http://localhost:1086/Web/EditMobile.aspx?sno=2. But when i try to enter the url as follows,localhost:1086/Web/EditMobile.aspx?sno=2*3424324423432424* , i get the following error-Value was either too large or too small for an Int32. How do i handle this error. I must get an error report like " the value is not found in the table or database"

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  • Can you password protect access to a directory (to local and networked PCs) in Windows XP Pro?

    - by Clay Nichols
    I could just compress the directory as a .zip file w/ a password (which I think would just look like a compressed folder w/ a password) but I'd like something with less overhead (i.e., none of the decompression, etc.) Any ideas? Clarification/update: I'd like to have anyone be able to access it from another computer if they know the password. I.e., I don't want them to have to log in as a different user, etc., but, rather just enter a password.

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  • Must JsUnit Cases Reside Under the Same Directory as JsUnit?

    - by chernevik
    I have installed JsUnit and a test case as follows: /home/chernevik/Programming/JavaScript/jsunit /home/chernevik/Programming/JavaScript/jsunit/testRunner.html /home/chernevik/Programming/JavaScript/jsunit/myTests/lineTestAbs.html /home/chernevik/Programming/JavaScript/lineTestAbs.html When I open the test runner in a browser as a file, and test lineTestAbs.html from the jsunit/myTests directory, it passes. When I test the same file from the JavaScript directory, the test runner times out, asking if the file exists or is a test page. Questions: Am I doing something wrong here, or is this the expected behavior? Is it possible to put test cases in a different directory structure, and if so what is the proper path reference to to JsUnitCore.js? Would JsUnit behave differently if the files were retrieved from an HTTP server? <html> <head> <title>Test Page line(m, x, b)</title> <script language="JavaScript" src="/home/chernevik/Programming/JavaScript/jsunit/app/jsUnitCore.js"></script> <script language="JavaScript"> function line(m, x, b) { return m*x + b; } function testCalculationIsValid() { assertEquals("zero intercept", 10, line(5, 2, 0)); assertEquals("zero slope", 5, line(0, 2, 5)); assertEquals("at x = 10", 25, line(2, 10, 5)); } </script> </head> <body> This pages tests line(m, x, b). </body> </html>

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  • I got the address of a large managed object in WinDbg, what next?

    - by Mahen
    I created a high memory utilization dump and using !dumpheap -stat and !dumpheap -mt I got the address of two large string generic list of 30 MB each. I want to know more about these lists. What they contain or which piece of code is using them. Is there a way to find them out? 0:000 !do 2b370038 Name: System.Object[] MethodTable: 71e240bc EEClass: 71c0da54 Size: 33554448(0x2000010) bytes Array: Rank 1, Number of elements 8388608, Type CLASS Element Type: System.Collections.Generic.List`1[[System.String, mscorlib]] Fields: None

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  • Firefox all but freezes during large file upload; Ajax progress bar infeasible; IE6 works fine

    - by Sean
    I want to provide a progress bar for my users who upload very large files. I did some reading and implemented what should be a pretty straightforward solution: I have a <form> element that contains an file input element; its target is set to the ID of a hidden iframe. On the server side, there's some Spring magic that attaches an object to the user's session; the progress of the upload can be queried from this object. After submitting the form, I start a repeating Ajax call using setInterval that queries the server for the percent-complete using the aforementioned session object. The call repeats every half-second, skipping the Ajax call if the previous call has not yet completed. I use the data from the call to update the width of an onscreen element. When the server call reports that the upload is complete, I clear the interval timer. I created a 100-megabyte file and uploaded it using my interface. This is using Firefox 3.6.3. What I found is that although the upload takes 20-25 seconds, the progress bar doesn't get updated until the very end. Moreover, the entire browser is basically frozen until the upload completes. I assumed that my method must be flawed, but I tried the same page using IE6, and was utterly amazed when it behaved as I had designed it to--the progress bar got updated every half second, and the whole upload only took about 15 seconds, much faster than Firefox. I don't have many add-ons installed, but I tried disabling Firebug and restarting my browser. This marginally improved the performance--I got perhaps a single additional progress bar update mid-upload--but still far from acceptable. Can anyone tell me what I can do to bring Firefox's performance up to the level of IE6? Ugh, I can't believe I actually typed that. EDIT: I just tried uploading a large file from a Firefox 3.6.3 browser on a different machine than the one that's running my web server, and it worked fine. Huh.

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