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  • Hibernate: OutOfMemoryError persisting Blob when printing log message

    - by paul
    I have a Hibernate Entity: @Entity class Foo { //... @Lob public byte[] getBytes() { return bytes; } //.... } My VM is configured with a maximum heap size of 512 MB. When I try to persist an object which has a 75 MB large object, I get an OutOfMemoryError. The names of the methods in the stack trace (StringBuilder, ByteArrayBlobType.toLoggableString, pretty.Printer.toString) suggest that hibernate is trying to write a very large log message that contains my object. Am I correct about why hibernate is using so much memory? What is the simplest way to work around this problem? java.lang.OutOfMemoryError: Java heap space at java.lang.AbstractStringBuilder.<init>(AbstractStringBuilder.java:44) at java.lang.StringBuilder.<init>(StringBuilder.java:81) at org.hibernate.type.ByteArrayBlobType.toString(ByteArrayBlobType.java:117) at org.hibernate.type.ByteArrayBlobType.toLoggableString(ByteArrayBlobType.java:127) at org.hibernate.pretty.Printer.toString(Printer.java:53) at org.hibernate.pretty.Printer.toString(Printer.java:90) at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:97) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.jboss.seam.persistence.HibernateSessionProxy.flush(HibernateSessionProxy.java:181)

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  • JQTOUCH, Binding to links pulled in via AJAX, to make another AJAX call? Possible?

    - by nobosh
    Hello. I'm using JQTOUCH using the AJAX example provided in the demo: $('#customers').bind('pageAnimationEnd', function(e, info){ if (!$(this).data('loaded')) { // Make sure the data hasn't already been loaded (we'll set 'loaded' to true a couple lines further down) $('.loadingscreen').css({'display':'block'}); $(this).append($('<div> </div>'). // Append a placeholder in case the remote HTML takes its sweet time making it back load('/mobile/ajax/customers/ .info', function() { // Overwrite the "Loading" placeholder text with the remote HTML $(this).parent().data('loaded', true); // Set the 'loaded' var to true so we know not to re-load the HTML next time the #callback div animation ends $('.loadingscreen').css({'display':'none'}); })); } }); This then returns a nice UL which outputs just fine.. <ul class="edgetoedge"> <li class="viewaction" id="715"> <span class="Title"><a href="/c-view/715/">Lorem Ipsum is simply dummy text of the...</a></span> <div class="meta"> <span class="dateAdded"> 1d ago </span> </div> </li> </ul> This is where I get stuck. How can I then make it so when you click on the link above, it loads the URL wrapped near the class="Title" ? I'd like it to load JQTouch like the first code example. I tried the following two things without success: $('.viewaction').bind('click', function() { alert('wow'); }); $('.viewaction').live('pageAnimationEnd', function(e, info){ }); Thank you!

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  • HTTP POST to Imageshack

    - by Brandon Schlenker
    I am currently uploading images to my server via HTTP POST. Everything works fine using the code below. NSString *UDID = md5([UIDevice currentDevice].uniqueIdentifier); NSString *filename = [NSString stringWithFormat:@"%@-%@", UDID, [NSDate date]]; NSString *urlString = @"http://taptation.com/stationary_data/index.php"; request= [[[NSMutableURLRequest alloc] init] autorelease]; [request setURL:[NSURL URLWithString:urlString]]; [request setHTTPMethod:@"POST"]; NSString *boundary = @"---------------------------14737809831466499882746641449"; NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary]; [request addValue:contentType forHTTPHeaderField: @"Content-Type"]; NSMutableData *postbody = [NSMutableData data]; [postbody appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [postbody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@.jpg\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]]; [postbody appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; [postbody appendData:[NSData dataWithData:imageData]]; [postbody appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]]; [request setHTTPBody:postbody]; NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil]; returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]; NSLog(returnString); However, when I try to convert this to work with Image Shacks XML API, it doesn't return anything. The directions from ImageShack are below. Send the following variables via POST to imageshack. us /index.php fileupload; (the image) xml = "yes"; (specifies the return of XML) cookie; (registration code, optional) Does anyone know where I should go from here?

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  • How and when do browsers implement real-time changes to a document's DOM?

    - by Mark
    My website dynamically embeds an external Javascript file into the head tag. The external Javascript defines a global variable myString = "data". At what point does myString become accessible to Javascript within the website? <html> <head> <script type="text/javascript"> myString = null; external = document.createElement("script"); //externalScript.js is one line, containing the following: //myString = "data"; external.setAttribute("src", "externalScript.js"); external.setAttribute("type", "text/javascript"); document.getElementsByTagName("head")[0].append(external); alert(myString); <script> </head> <body> </body> </html> This code alerts null (when I thought it would alert "data") in Chrome and IE, even though the DOM has loaded in externalScript.js at this point. When is externalScript.js actually evaluated by the browser and at what point do I have access to the new value of myString?

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  • Distinguishing between .NET exception types

    - by Swingline Rage
    For the love of all things holy, how do you distinguish between different "exception flavors" within the predefined .NET exception classes? For example, a piece of code might throw an XmlException under the following conditions: The root element of the document is NULL Invalid chars are in the document The document is too long All of these are thrown as XmlException objects and all of the internal "tell me more about this exception" fields (such as Exception.HResult, Exception.Data, etc.) are usually empty or null. That leaves Exception.Message as the only thing that allows you to distinguish among these exception types, and you can't really depend on it because, you guessed it, the Exception.Message string is glocabilized, and can change when the culture changes. At least that's my read on the documentation. Exception.HResult and Exception.Data are widely ignored across the .NET libraries. They are the red-headed stepchildren of the world's .NET error-handling code. And even assuming they weren't, the HRESULT type is still the worst, downright nastiest error code in the history of error codes. Why we are still looking at HRESULTs in 2010 is beyond me. I mean if you're doing Interop or P/Invoke that's one thing but... HRESULTs have no place in System.Exception. HRESULTs are a wart on the proboscis of System.Exception. But seriously, it means I have to set up a lot of detailed specific error-handling code in order to figure out the same information that should have been passed as part of the exception data. Exceptions are useless if they force you to work like this. What am I doing wrong?

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  • System.Web.Caching vs. Enterprise Library Caching Block

    - by ESV
    For a .NET component that will be used in both web applications and rich client applications, there seem to be two obvious options for caching: System.Web.Caching or the Ent. Lib. Caching Block. What do you use? Why? System.Web.Caching Is this safe to use outside of web apps? I've seen mixed information, but I think the answer is maybe-kind-of-not-really. a KB article warning against 1.0 and 1.1 non web app use The 2.0 page has a comment that indicates it's OK: http://msdn.microsoft.com/en-us/library/system.web.caching.cache(VS.80).aspx Scott Hanselman is creeped out by the notion The 3.5 page includes a warning against such use Rob Howard encouraged use outside of web apps I don't expect to use one of its highlights, SqlCacheDependency, but the addition of CacheItemUpdateCallback in .NET 3.5 seems like a Really Good Thing. Enterprise Library Caching Application Block other blocks are already in use so the dependency already exists cache persistence isn't necessary; regenerating the cache on restart is OK Some cache items should always be available, but be refreshed periodically. For these items, getting a callback after an item has been removed is not very convenient. It looks like a client will have to just sleep and poll until the cache item is repopulated. Memcached for Win32 + .NET client What are the pros and cons when you don't need a distributed cache?

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  • Update CGridView when a dropdown value changes

    - by Gautam Borad
    I have a CGridView with columns from a table "product" => {'product_id','category_id',...} I have another table "category" => {'category_id','category_name'} category_id is the FK in the product table. Now i want a dropdown list of the category table and on selecting a particular value the CGridView of product should be updated to show only the rows with that category_id. I also need the column filtering/sorting for the CGridView to work (using AJAX). I was able to refresh the CGridView when a value is selected from the dropdown, however i am not able to send the category_id with the 'data' for the CGridView: clientScript-registerScript('search', " $('.cat_dropdown').change(function(){ $.fn.yiiGridView.update('order-grid', { data: $(this).serialize(), }); return false; }); "); The data: $(this).serialize() sends only the values that are present in the filtering text fields of the CGridView. How do i append the category_id with it? If the above method is not the right one, please suggest an alternative method.

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  • How can I write a clean Repository without exposing IQueryable to the rest of my application?

    - by Simucal
    So, I've read all the Q&A's here on SO regarding the subject of whether or not to expose IQueryable to the rest of your project or not (see here, and here), and I've ultimately decided that I don't want to expose IQueryable to anything but my Model. Because IQueryable is tied to certain persistence implementations I don't like the idea of locking myself into this. Similarly, I'm not sure how good I feel about classes further down the call chain modifying the actual query that aren't in the repository. So, does anyone have any suggestions for how to write a clean and concise Repository without doing this? One problem I see, is my Repository will blow up from a ton of methods for various things I need to filter my query off of. Having a bunch of: IEnumerable GetProductsSinceDate(DateTime date); IEnumberable GetProductsByName(string name); IEnumberable GetProductsByID(int ID); If I was allowing IQueryable to be passed around I could easily have a generic repository that looked like: public interface IRepository<T> where T : class { T GetById(int id); IQueryable<T> GetAll(); void InsertOnSubmit(T entity); void DeleteOnSubmit(T entity); void SubmitChanges(); } However, if you aren't using IQueryable then methods like GetAll() aren't really practical since lazy evaluation won't be taking place down the line. I don't want to return 10,000 records only to use 10 of them later. What is the answer here? In Conery's MVC Storefront he created another layer called the "Service" layer which received IQueryable results from the respository and was responsible for applying various filters. Is this what I should do, or something similar? Have my repository return IQueryable but restrict access to it by hiding it behind a bunch of filter classes like GetProductByName, which will return a concrete type like IList or IEnumerable?

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  • Ruby on Rails export to csv - maintain mysql select statement order

    - by zekial
    Exporting some data from mysql to a csv file using FasterCSV. I'd like the columns in the outputted CSV to be in the same order as the select statement in my query. Example: rows = Data.find( :all, :select=>'name, age, height, weight' ) headers = rows[0].attributes.keys FasterCSV.generate do |csv| csv << headers rows.each do |r| csv << r.attributes.values end end CSV Output: height,weight,name,age 74,212,bob,23 70,201,fred,24 . . . I want the CSV columns in the same order as my select statement. Obviously the attributes method is not going to work. Any ideas on the best way to ensure that the columns in my csv file will be in the same order as the select statement? Got a lot of data and performance is an issue. The select statement is not static. I realize I could loop through column names within the rows.each loop but it seems kinda dirty.

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  • SQL Server slow in production environment

    - by Lieven Cardoen
    I have a weird problem in a customer's production environment. I can't give any details on the infrastructure, except that SQL server runs on a virtual server. The data, log and filestream file are on another storage server (data and filestream together and log on a separate server). In our local Test environment, there's one particular query that executes with these durations: first we clear the cache 300ms (First time it takes longer, but from then on it's cached.) 20ms 15ms 17ms In the customer's production environment, the SQL Server is more powerful, these are the durations (I didn't have the rights to clear the cache. Will try this tomorrow). 2500ms 2600ms 2400ms The servers in the customer's production environment are more powerful but they do have virtual servers (we don't). What could be the cause... Not enough memory? Fragmentation? Physical storage? How would you tackle this performance problem? EDIT: Some people have asked me if the data set is equal and it is. I restored their database on our environment. It's true that this was the first thing I looked at. (@Everyone: I added the edit because it will be the first thing that many will think off).

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  • Configuration Error ASP.NET password format specified is invalid

    - by salvationishere
    I am getting the above error in IIS 6.0 now when I browse my C# / SQL web application. This was built in VS 2008 and SS 2008 on a 32-bit XP OS. The application was working before I added Login controls to it. However, this is my first time configuring Login/password controls so I am probably missing something really basic. This error doesn't happen until I try to login. Here are the details of my error from IIS; I get the same error in VS: Parser Error Message: Password format specified is invalid. Source Error: Line 31: <add Line 32: name="SqlProvider" Line 33: type="System.Web.Security.SqlMembershipProvider" Line 34: connectionStringName="AdventureWorksConnectionString2" Line 35: applicationName="AddFileToSQL2" Source File: C:\Inetpub\AddFileToSQL2\web.config Line: 33 And the relevant contents of my web.config are: <connectionStrings> <add name="Master" connectionString="server=MSSQLSERVER;database=Master; Integrated Security=SSPI" providerName="System.Data.SqlClient" /> <add name="AdventureWorksConnectionString" connectionString="Data Source=SIDEKICK;Initial Catalog=AdventureWorks;Integrated Security=True" providerName="System.Data.SqlClient" /> <add name="AdventureWorksConnectionString2" connectionString="Data Source=SIDEKICK;Initial Catalog=AdventureWorks;Integrated Security=True; " providerName="System.Data.SqlClient" /> </connectionStrings> <system.web> <membership defaultProvider="SqlProvider" userIsOnlineTimeWindow="15"> <providers> <clear /> <add name="SqlProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="AdventureWorksConnectionString2" applicationName="AddFileToSQL2" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" requiresUniqueEmail="false" passwordFormat="encrypted" /> </providers> </membership> <!-- Set compilation debug="true" to insert debugging symbols into the compiled page. Because this affects performance, set this value to true only during development. --> <roleManager enabled="true" /> <compilation debug="true"> <assemblies> <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/> </assemblies> </compilation> <!-- The <authentication> section enables configuration of the security authentication mode used by ASP.NET to identify an incoming user. --> <authentication mode="Forms"> <forms loginUrl="Password.aspx" protection="All" timeout="30" name="SqlAuthCookie" path="/FormsAuth" requireSSL="false" slidingExpiration="true" defaultUrl="default.aspx" cookieless="UseCookies" enableCrossAppRedirects="false" /> </authentication> <!--Authorization permits only authenticated users to access the application --> <authorization> <deny users="?" /> <allow users="*" /> </authorization> <!-- The <customErrors> section enables configuration of what to do if/when an unhandled error occurs during the execution of a request. Specifically, it enables developers to configure html error pages to be displayed in place of a error stack trace. <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"> <error statusCode="403" redirect="NoAccess.htm" /> <error statusCode="404" redirect="FileNotFound.htm" /> </customErrors> --> <pages> <controls> <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </controls> </pages> <httpHandlers> <remove verb="*" path="*.asmx"/> <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/> </httpHandlers> <httpModules> <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </httpModules> </system.web> <system.codedom> <compilers> <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"> <providerOption name="CompilerVersion" value="v3.5"/> <providerOption name="WarnAsError" value="false"/> </compiler> </compilers> </system.codedom> <!-- The system.webServer section is required for running ASP.NET AJAX under Internet Information Services 7.0. It is not necessary for previous version of IIS. --> <system.webServer> <validation validateIntegratedModeConfiguration="false"/> <modules> <remove name="ScriptModule"/> <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </modules> <handlers> <remove name="WebServiceHandlerFactory-Integrated"/> <remove name="ScriptHandlerFactory"/> <remove name="ScriptHandlerFactoryAppServices"/> <remove name="ScriptResource"/> <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/> </handlers> </system.webServer> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> <dependentAssembly> <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/> <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/> </dependentAssembly> </assemblyBinding> </runtime> <system.net> <mailSettings> <smtp from="[email protected]"> <network host="SIDEKICK" password="" userName="" /> </smtp> </mailSettings> </system.net> </configuration> I checked and I do have an aspnetdb database in my SSMS. The Network Service account has SELECT, EXECUTE, INSERT, UPDATE access to this database. But one problem I see is that all of the tables in this database are empty except for aspnet_SchemaVersions, which just has 2 records (common and membership). Is this right? I added users and roles via ASP.NET Configuration wizard, and I believe I set this up correctly since I followed the Microsoft tutorial at http://msdn.microsoft.com/en-us/library/ms998347.aspx. One other problem I see from VS is after adding content to my Page_Load on my initial login Password.aspx.cs file, I'm getting an invalid cast problem below. I googled this problem also but the solutions I saw confused me even more. The Page_Load section I added is: protected void Page_Load(object sender, EventArgs e) { Response.Write("Hello, " + Server.HtmlEncode(User.Identity.Name)); FormsIdentity id = (FormsIdentity)User.Identity; FormsAuthenticationTicket ticket = id.Ticket; Response.Write("<p/>TicketName: " + ticket.Name); Response.Write("<br/>Cookie Path: " + ticket.CookiePath); Response.Write("<br/>Ticket Expiration: " + ticket.Expiration.ToString()); Response.Write("<br/>Expired: " + ticket.Expired.ToString()); Response.Write("<br/>Persistent: " + ticket.IsPersistent.ToString()); Response.Write("<br/>IssueDate: " + ticket.IssueDate.ToString()); Response.Write("<br/>UserData: " + ticket.UserData); Response.Write("<br/>Version: " + ticket.Version.ToString()); } And the VS exception I'm getting: System.InvalidCastException was unhandled by user code Message="Unable to cast object of type 'System.Security.Principal.GenericIdentity' to type 'System.Web.Security.FormsIdentity'." Source="AddFileToSQL" StackTrace: at AddFileToSQL.Password.Page_Load(Object sender, EventArgs e) in C:\Documents and Settings\Admin\My Documents\Visual Studio 2008\Projects\AddFileToSQL2\AddFileToSQL\Password.aspx.cs:line 22 at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) InnerException:

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  • CData section not finished problem

    - by tomaszs
    When I use DOMDocument::loadXML() for my XML below I get error: Warning: DOMDocument::loadXML() [domdocument.loadxml]: CData section not finished http://www.pdclipart.org/displayimage.php?album=se in Entity, Warning: DOMDocument::loadXML() [domdocument.loadxml]: Premature end of data in tag image line 7 in Entity Warning: DOMDocument::loadXML() [domdocument.loadxml]: Premature end of data in tag quizz line 3 in Entity Warning: DOMDocument::loadXML() [domdocument.loadxml]: Premature end of data in tag quizzes line 2 in Entity Fatal error: Call to a member function getElementsByTagName() on a non-object It seems to me that my CData sections are closed but still I get this error. XML looks like this: <?xml version="1.0" encoding="utf-8"?> <quizzes> <quizz> <title><![CDATA[Title]]></title> <descr><![CDATA[Some text here!]]></descr> <tags><![CDATA[one tag, second tag]]></tags> <image><![CDATA[http://www.site.org/displayimage.php?album=search&cat=0&pos=1]]></image> <results> <result> <title><![CDATA[Something]]></title> <descr><![CDATA[Some text here]]></descr> <image><![CDATA[http://www.site.org/displayimage.php?album=search&cat=0&pos=17]]></image> <id>1</id> </result> </results> </quizz> </quizzes> Could you help me discover what is the problem?

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  • Prevent full table scan for query with multiple where clauses

    - by Dave Jarvis
    A while ago I posted a message about optimizing a query in MySQL. I have since ported the data and query to PostgreSQL, but now PostgreSQL has the same problem. The solution in MySQL was to force the optimizer to not optimize using STRAIGHT_JOIN. PostgreSQL offers no such option. Here is the explain: Here is the query: SELECT avg(d.amount) AS amount, y.year FROM station s, station_district sd, year_ref y, month_ref m, daily d LEFT JOIN city c ON c.id = 10663 WHERE -- Find all the stations within a specific unit radius ... -- 6371.009 * SQRT( POW(RADIANS(c.latitude_decimal - s.latitude_decimal), 2) + (COS(RADIANS(c.latitude_decimal + s.latitude_decimal) / 2) * POW(RADIANS(c.longitude_decimal - s.longitude_decimal), 2)) ) <= 50 AND -- Ignore stations outside the given elevations -- s.elevation BETWEEN 0 AND 2000 AND sd.id = s.station_district_id AND -- Gather all known years for that station ... -- y.station_district_id = sd.id AND -- The data before 1900 is shaky; insufficient after 2009. -- y.year BETWEEN 1980 AND 2000 AND -- Filtered by all known months ... -- m.year_ref_id = y.id AND m.month = 12 AND -- Whittled down by category ... -- m.category_id = '001' AND -- Into the valid daily climate data. -- m.id = d.month_ref_id AND d.daily_flag_id <> 'M' GROUP BY y.year It appears as though PostgreSQL is looking at the DAILY table first, which is simply not the right way to go about this query as there are nearly 300 million rows. How do I force PostgreSQL to start at the CITY table? Thank you!

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  • Still about SSD potentials...write and read speed

    - by Macroideal
    HI Gurus, I have been working on SSD(solid state disk) for several months..Problems and Questions hit my head unexpectedly..Coz i am a virgin in ssd... Esp these days i was testing the write-read speed of ssd, which I was always caring.... however result turned out not good as I expected, or even worse Three kinds of read-write were implemented in my test 1. read and write directly from and into ssd, with openning ssd as a whole device. in windows: _open("\\:g", ***).. It can be very tricky and hairy that you'd write a data with size of folds of 512, at the disk position of folds of 512bytes... So, If you wanto write just a byte or 4 bytes, you'v to write at least a whole sector one time. 2. Read and write data from and into files located in SSD... 3. Read and Write data from and into files in mechanical Disk I compared the pratices below...I found ssd sucks...the ssd performs worse than mechanical disk... so i am wondering where i can get the potential performance of ssd, since ssd is said to a substitute for mechanical disk in the future.. Nevertheless, I test ssd with a pro-hard-disk tools..ssd is like twice speedier than mechanical disk. So, why? Thanx very much...If you know tips of ssd...follow me

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  • NHibernate Generators

    - by Dan
    What is the best tool for generating Entity Class and/or hbm files and/or sql script for NHibernate. This list below is from http://www.hibernate.org/365.html, which is the best any why? Moregen Free, Open Source (GPL) O/R Generator that can merge into existing Visual Studio Projects. Also merges changes to generated classes. NConstruct Lite Free tool for generating NHibernate O/R mapping source code. Different databases support (Microsoft SQL Server, Oracle, Access). GENNIT NHibernate Code Generator Free/Commercial Web 2.0 code generation of NHibernate code using WYSIWYG online UML designer. GenWise Studio with NHibernate Template Commercial product; Imports your existing database and generates all XML and Classes, including factories. It can also generate a asp.net web-application for your NHibernate BO-Layer automatically. HQL Analyzer and hbm.xml GUI Editor ObjectMapper by Mats Helander is a mapping GUI with NHibernate support MyGeneration is a template-based code generator GUI. Its template library includes templates for generating mapping files and classes from a database. AndroMDA is an open-source code generation framework that uses Model Driven Architecture (MDA) to transform UML models into deployable components. It supports generation of data access layers that use NHibernate as their persistence framework. CodeSmith Template for NH NHibernate Helper Kit is a VS2005 add-in to generate classes and mapping files. NConstruct - Intelligent Software Factory Commercial product; Full .NET C# source code generation for all tiers of the information system trough simple wizard procedure. O/R mapping based on NHibernate. For both WinForms and ASP.NET 2.0.

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  • How can I convert this PHP script to Ruby? (build tree from tabbed string)

    - by Jon Sunrays
    I found this script below online, and I'm wondering how I can do the same thing with a Ruby on Rails setup. So, first off, I ran this command: rails g model Node node_id:integer title:string Given this set up, how can I make a tree from a tabbed string like the following? <?php // Make sure to have "Academia" be root node with nodeID of 1 $data = " Social sciences Anthropology Biological anthropology Forensic anthropology Gene-culture coevolution Human behavioral ecology Human evolution Medical anthropology Paleoanthropology Population genetics Primatology Anthropological linguistics Synchronic linguistics (or Descriptive linguistics) Diachronic linguistics (or Historical linguistics) Ethnolinguistics Sociolinguistics Cultural anthropology Anthropology of religion Economic anthropology Ethnography Ethnohistory Ethnology Ethnomusicology Folklore Mythology Political anthropology Psychological anthropology Archaeology ...(goes on for a long time) "; //echo "Checkpoint 2\n"; $lines = preg_split("/\n/", $data); $parentids = array(0 => null); $db = new PDO("host", 'username', 'pass'); $sql = 'INSERT INTO `TreeNode` SET ParentID = ?, Title = ?'; $stmt = $db->prepare($sql); foreach ($lines as $line) { if (!preg_match('/^([\s]*)(.*)$/', $line, $m)) { continue; } $spaces = strlen($m[1]); //$level = intval($spaces / 4); //assumes four spaces per indent $level = strlen($m[1]); // if data is tab indented $title = $m[2]; $parentid = ($level > 0 ? $parentids[$level - 1] : 1); //All "roots" are children of "Academia" which has an ID of "1"; $rv = $stmt->execute(array($parentid, $title)); $parentids[$level] = $db->lastInsertId(); echo "inserted $parentid - " . $parentid . " title: " . $title . "\n"; } ?>

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  • ASP.NET MVC: what mechanic returns ViewModel objects?

    - by Dr. Zim
    As I understand it, Domain Models are classes that only describe the data (aggregate roots). They are POCOs and do not reference outside libraries (nothing special). View models on the other hand are classes that contain domain model objects as well as all the interface specific objects like SelectList. A ViewModel includes using System.Web.Mvc;. A repository pulls data out of a database and feeds them to us through domain model objects. What mechanic or device creates the view model objects, populating them from a database? Would it be a factory that has database access? Would you bleed the view specific classes like System.Web.Mvc in to the Repository? Something else? For example, if you have a drop down list of cities, you would reference a SelectList object in the root of your View Model object, right next to your DomainModel reference: public class CustomerForm { public CustomerAddress address {get;set;} public SelectList cities {get;set;} } The cities should come from a database and be in the form of a select list object. The hope is that you don't create a special Repository method to extract out just the distinct cities, then create a redundant second SelectList object only so you have the right data types.

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  • EJB3 - @Column(insertable="false") question

    - by WhiteTigerK
    Hi All, I'm building a J2SE application with EJB3 and an Oracle Express Edition DB. My problem is like that - I set an EntityBean in my project which matches a table in the DB. The table contains a column which is not nullable and has a default value. All I want is that when persisting a new data to this table using the EJB, the column's value will get its default value. This is how I set it in the project: //holds user's first name @Basic(optional = true) @Column(name = "FIRST_NAME", insertable = false, updatable = true, nullable = false) private String m_firstName; I also set it in the ORM.XML file: <basic name="firstName"> <column name="FIRST_NAME" insertable="false" updatable="true" nullable="false"/> </basic> But for some reason, when creating a new EntityBean and not setting the first name field, and then trying to persist it, i get the following exception: Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.1 (Build b60e-fcs (12/23/2008))): oracle.toplink.essentials.exceptions.DatabaseException Internal Exception: java.sql.SQLException: ORA-01400: cannot insert NULL into ("TSDB"."USERS"."FIRST_NAME") Which means that the persistence manager tries to insert the first name field although I told it not to. Am I doing something wrong here ? Thanks!

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  • Making a concurrent AJAX WCF Web Service request during an Async Postback

    - by nekno
    I want to provide status updates during a long-running task on an ASP.NET WebForms page with AJAX. Is there a way to get the ScriptManager to execute and process a script for a web service request concurrently with an async postback? I have a script on the page that makes a web service request. It runs on page load and periodically using setInterval(). It's running correctly before the async postback is initiated, but it stops running during the async postback, and doesn't run again until after the async postback completes. I have an UpdatePanel with a button to trigger an async postback, which executes the long-running task. I also have an instance of an AJAX WCF Web service that is working correctly to fetch data and present it on the page but, like I said, it doesn't fetch and present the data until after the async postback completes. During the async postback, the long-running task sends updates from the page to the web service. The problem is that I can debug and step through the web service and see that the status updates are correctly set, but the updates aren't retrieved by the client script until the async postback completes. It seems the Script Manager is busy executing the async postback, so it doesn't run my other JavaScript via setInterval() until the postback completes. Is there a way to get the Script Manager, or otherwise, to run the script to fetch data from the WCF web service during the async postback? I've tried various methods of using the PageRequestManager to run the script on the client-side BeginRequest event for the async postback, but it runs the script, then stops processing the code that should be running via setInterval() while the page request executes.

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  • LINQ to DataSet Dataclass assignment question

    - by Overhed
    Hi all, I'm working on a Silverlight project trying to access a database using LINQ To DataSet and then sending data over to Silverlight via .ASMX web service. I've defined my DataSet using the Server Explorer tool (dragging and dropping all the different tables that I'm interested in). The DataSet is able to access the server and database with no issues. Below is code from one of my Web Methods: public List<ClassSpecification> getSpecifications() { DataSet2TableAdapters.SpecificationTableAdapter Sta = new DataSet2TableAdapters.SpecificationTableAdapter(); return (from Spec in Sta.GetData().AsEnumerable() select new ClassSpecification() { Specification = Spec.Field<String>("Specification"), SpecificationType = Spec.Field<string>("SpecificationType"), StatusChange = Spec.Field<DateTime>("StatusChange"), Spec = Spec.Field<int>("Spec") }).ToList<ClassSpecification>(); } I created a "ClassSpecification" data class which is going to contain my data and it has all the table fields as properties. My question is, is there a quicker way of doing the assignment than what is shown here? There are actually about 10 more fields, and I would imagine that since my DataSet knows my table definition, that I would have a quicker way of doing the assignment than going field by field. I tried just "select new ClassSpecification()).ToList Any help would be greatly appreciated.

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  • Can I select 0 columns in SQL Server?

    - by Woody Zenfell III
    I am hoping this question fares a little better than the similar Create a table without columns. Yes, I am asking about something that will strike most as pointlessly academic. It is easy to produce a SELECT result with 0 rows (but with columns), e.g. SELECT a = 1 WHERE 1 = 0. Is it possible to produce a SELECT result with 0 columns (but with rows)? e.g. something like SELECT NO COLUMNS FROM Foo. (This is not valid T-SQL.) I came across this because I wanted to insert several rows without specifying any column data for any of them. e.g. (SQL Server 2005) CREATE TABLE Bar (id INT NOT NULL IDENTITY PRIMARY KEY) INSERT INTO Bar SELECT NO COLUMNS FROM Foo -- Invalid column name 'NO'. -- An explicit value for the identity column in table 'Bar' can only be specified when a column list is used and IDENTITY_INSERT is ON. One can insert a single row without specifying any column data, e.g. INSERT INTO Foo DEFAULT VALUES. One can query for a count of rows (without retrieving actual column data from the table), e.g. SELECT COUNT(*) FROM Foo. (But that result set, of course, has a column.) I tried things like INSERT INTO Bar () SELECT * FROM Foo -- Parameters supplied for object 'Bar' which is not a function. -- If the parameters are intended as a table hint, a WITH keyword is required. and INSERT INTO Bar DEFAULT VALUES SELECT * FROM Foo -- which is a standalone INSERT statement followed by a standalone SELECT statement. I can do what I need to do a different way, but the apparent lack of consistency in support for degenerate cases surprises me. I read through the relevant sections of BOL and didn't see anything. I was surprised to come up with nothing via Google either.

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  • Ruby rail debug output

    - by Darkerstar
    Hi all: I am just starting to write ruby rails. I wrote a controller but is getting wrong number of "arguments (1 for 0)" error, I can't understand why. It has no information on where the error occurred? It has a full list of stack traces but my controller file is not in there! In my controller I have just two methods, that I was going to test out activemq. But after I put the controller out, I got the above error, so I commented out all the code, but I still get the same error. I can't figure out why. I searched google for ruby debug, I have not found anything helpful. Here is my controller source: class ActivemqTestController < ApplicationController def send #client = Stomp::Client.open("stomp://localhost:61613") #station_id=101 #data = {'station_id' => station_id, 'username' => 'yangyanzhe'} #client.publish('/listener/add', data) end def receive #client = Stomp::Client.open("stomp://localhost:61613") # Processing loop #client.subscribe('/listener/add', headers) do |msg| # Process your message here # Your submitted data is in msg.body #puts msg['username'] + " joined " + msg['station_id'] + "\n" #client.acknowledge(msg) #end #client.join # Wait until listening thread dies end end This is the error: ArgumentError in Activemq testController#index wrong number of arguments (1 for 0) RAILS_ROOT: D:/rubyapps/radio Application Trace | Framework Trace | Full Trace f:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `send' f:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `process_without_filters' f:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:606:in `process' f:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:391:in `process' f:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:386:in `call' f:/Ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:437:in `call' Thank you for any help in advance.

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  • C# using namespace directive in nested namespaces

    - by MoSlo
    Right, I've usually used 'using' directives as follows using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace AwesomeLib { //awesome award winning class declarations making use of Linq } i've recently seen examples of such as using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace AwesomeLib { //awesome award winning class declarations making use of Linq namespace DataLibrary { using System.Data; //Data access layers and whatnot } } Granted, i understand that i can put USING inside of my namespace declaration. Such a thing makes sense to me if your namespaces are in the same root (they organized). System; namespace 1 {} namespace 2 { System.data; } But what of nested namespaces? Personally, I would leave all USING declarations at the top where you can find them easily. Instead, it looks like they're being spread all over the source file. Is there benefit to the USING directives being used this way in nested namespaces? Such as memory management or the JIT compiler?

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  • Salesforce/PHP - outbound messages (SOAP) - memory limit issue

    - by Phill Pafford
    I'm using Salesforce to send outbound messages (via SOAP) to another server. The server can process about 8 messages at a time, but will not send back the ACK file if the SOAP request contains more than 8 messages. SF can send up to 100 outbound messages in 1 SOAP request and I think this is causing a memory issue with PHP. If I process the outbound messages 1 by 1 they all go through fine, I can even do 8 at a time with no issues. But larger sets are not working. ERROR in SF: org.xml.sax.SAXParseException: Premature end of file Looking in the HTTP error logs I see that the incoming SOAP message looks to be getting cut of which throws a PHP warning stating: Premature end of data in tag ... PHP Fatal error: Call to a member function getAttribute() on a non-object This leads me to believe that PHP is having a memory issue and can not parse the incoming message due to it's size. I was thinking I could just set: ini_set('memory_limit', '64M'); But would this be the correct approach? Is there a way I could set this to increase with the incoming SOAP request dynamically? UPDATE: Adding some code $data = fopen('php://input','rb'); $headers = getallheaders(); $content_length = $headers['Content-Length']; $buffer_length = 1000; $fread_length = $content_length + $buffer_length; $content = fread($data,$fread_length); /** * Parse values from soap string into DOM XML */ $dom = new DOMDocument(); $dom->loadXML($content); ....

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  • WMD markdown editor - HTML to Markdown conversion

    - by gg1
    I am using wmd markdown editor on a project and had a question: When I post the form containing the markdown text area, it (as expected) posts html to the server. However, say upon server-side validation something fails and I need to send the user back to edit their entry, is there anyway to refill the textarea with just the markdown and not the html? Since as I have it set up, the server only has access to the post data (which is in the form of html) so I can't seem to think of a way to do this. Any ideas? Preferably a non-javascript based solution. Update: I found an html to markdown converter called markdownify. I guess this might be the best solution for displaying the markdown back to the user...any better alternatives are welcome! Update 2: I found this post on SO and I guess there is an option to send the data to the server as markdown instead of html. Are there any downsides to simply storing the data as markdown in the database? What about displaying it back to the user (outside of an editor)? Maybe it would be best to post both versions (html AND markdown) to the server... SOLVED: I can simply use php markdown to convert the markdown to html serverside.

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