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• How to run lengthy tasks from an ASP.NET page?

  - by Jimmy C

  I've got an ASP.NET page with a simple form. The user fills out the form with some details, uploads a document, and some processing of the file then needs to happens on the server side. My question is - what's the best approach to handling the server side processing of the files? The processing involves calling an exe. Should I use seperate threads for this? Ideally I want the user to submit the form without the web page just hanging there while the processing takes place. I've tried this code but my task never runs on the server: Action<object> action = (object obj) => { // Create a .xdu file for this job string xduFile = launcher.CreateSingleJobBatchFile(LanguagePair, SourceFileLocation); // Launch the job launcher.ProcessJob(xduFile); }; Task job = new Task(action, "test"); job.Start(); Any suggestions are appreciated.

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• NHibernate 3 and MySQL setup tutorial

  - by ryanzec

  Since I have given up on using the entity framework 4 as my ORM (getting it to work with MySQL and mapping table/field names like this_table/this_field to object naming like ThisTable/ThisField is POCO) I am now looking at NHibernate as it seems the the next big well know ORM for C# that probably with not die off any time soon. I am trying to lookup some tutorials and a lot of them in the configuration section have 2-2 in it and was wondering if those configuration would work with NHibernate 3? I am just curious if the 2-2 refers to the version of NHibernate or something different.

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• Coldfusion CFC creation taking a variable amout of time to execute.

  - by Bazza

  I've been doing some logging of object creation times in our open account process in production. Periodically, initializing an object would take way longer than expected. By initializing I mean calling it's init() and passing a couple of arguments that may be simple variables or objects. e.g. <cfset validateObj = createObject("component", "compExample").init( productionMode = VARIABLES.productionMode, ipWhiteListed = isWhiteListed, ipLocatorObj = VARIABLES.ipLocatorObj ) /> Thats all that happens in init() methods. Generally the execution time would be 0ms, but at random times I might get 3 or 3.5 seconds. This is not specific to one particular server or to our generally busy period. It appears to be quite random. One thought was that these templates were being evicted from our template cache as they are not especially frequently used, although I checked cfstat on a number of servers and the max CP/Sec is -1. Running CF 8,0,1 Has anybody else ever come across this?

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• vb.net how to start a folder monitor service at runtime and pass on the folder path to monitor?

  - by mazrabul

  hi, I have the following windows service file: Imports System.ServiceProcess Imports System.IO Public Class fswService Dim fsw As FileSystemWatcher Dim lf As StreamWriter Protected Overrides Sub OnStart(ByVal args As String()) ' Add code here to start your service. This method should set things ' in motion so your service can do its work. lf = New StreamWriter(Application.StartupPath & "\fsw_lg.log") fsw = New FileSystemWatcher() fsw.Path = args(0) fsw.IncludeSubdirectories = True fsw.Filter = ".txt" fsw.EnableRaisingEvents = True AddHandler fsw.Created, New FileSystemEventHandler(AddressOf file_created) AddHandler fsw.Changed, New FileSystemEventHandler(AddressOf file_changed) AddHandler fsw.Deleted, New FileSystemEventHandler(AddressOf file_deleted) End Sub Public Sub file_created(ByVal obj As Object, ByVal e As FileSystemEventArgs) lf.WriteLine(Now.ToShortDateString & "-" & Now.ToShortTimeString & "-" & e.FullPath & "-created") End Sub Public Sub file_changed(ByVal obj As Object, ByVal e As FileSystemEventArgs) lf.WriteLine(Now.ToShortDateString & "-" & Now.ToShortTimeString & "-" & e.FullPath & "-changed") End Sub Public Sub file_deleted(ByVal obj As Object, ByVal e As FileSystemEventArgs) lf.WriteLine(Now.ToShortDateString & "-" & Now.ToShortTimeString & "-" & e.FullPath & "-deleted") End Sub Protected Overrides Sub OnStop() lf.Close() End Sub End Class i have the ServiceName set to fswService (same as class name). When I added an installer I also set the ServiceName for the ServiceInstaller1 as fswService. I want to start this service at runtime based on the user setting the path of the folder to be watched. To achieve this I have the following: Dim fsw_controller As New ServiceProcess.ServiceController fsw_controller.Start(fswService) 2 problems: first, intellisense error saying: 'fswService' is a type and cannot be used as an expression. second, I can not figure out a way to pass on to the service the path of the folder to watch (which is stored at My.Settings.userPath). I really thought this is how you start a service. Am I missing something? Your help is, as always, appreciated. Thanks

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• Links to ASP.NET application in MS Word document

  - by Borat

  I am observing a weird behavior when clicking links to my ASP.NET application in MS Word 2003 / 2007 document. I have IE8 installed. When I click a link in the document the request that is sent has the user-agent IE7(!?). A new session object is created. Right after that out of nowhere a second request appears this time having user-agent IE8. More over, when I click anything on the requested page, a new session object is once again created, so I cannot rely on anything that has been persisted in the session. Why is it like that?

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• Handling changes in column order when importing CSV files

  - by Scott

  I have a CSV file. The first row will always contain column headers. Depending on a variety of factors, the order of columns may change and, in rare circumstances, some columns may not be present. These changes are beyond my control. My thoughts, so far, on how to address this. I'll read the first row of the file and use the values to generate a list of columns contained in the source file. The destination file will use the same column names as the source. This should be as simple as searching for identical names in the source and destination, then just mapping the column index values, right? What are your recommendations for handling this?

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• Treating a fat webservice in .net 3.5 c#

  - by Chris M

  I'm dealing with an obese 3rd party webservice that returns about 3mb of data for a simple search results, about 50% of the data in that response is junk. Would it make sense then to remap this data to my own result object and ditch the response so I'm storing 1-2 mb in memory for filtering and sorting rather than using the web-responses own object and using 2-4 or am I missing a point? So far I've been accessing the webservice from a separate project and using a new class to provide the interaction and to handle the persistence so my project looks like this |- Web (mvc2 proj) |- DAL (database/storage fluent-nhibernate) |- SVCGateway (interaction layer + webservice related models) |- Services -------------- |- Tests |- Specs I'm trying to make the application behave fast and I also need to store the result set temporarily in case a customer goes to view the product and wants to go back to the results. (Service returns only 500 of possible 14K results). So basically I'm looking for confirmation that I'm doing the right thing in pushing the results into my own objects or if I'm breaking some rule or even if there's a better way of handling it. Thanks

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• WCF DataContract GetCustomDataToExport

  - by JeffN825

  I'm trying to get the default behavior for a client referencing my WCF WSDL to set IsReference to true on the imported DataContracts. It looks like I should be able to use an IDataContractSurrogate with GetCustomDataToExport to accomplish this...which specifcally means adding the following to the generated ComplexType in the xsd associated with the WSDL: <xs:attribute ref="ser:Id" /> <xs:attribute ref="ser:Ref" /> There is, of course no usable documentation I can find from MS about how to use this method. The MSDN page says it should return an object...but does not indicate at all what type of object this should be....how useless... Before I go reflector'ing for this, does anyone out there know how to use this method? Thanks.

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• Is calling of overload operator-> resolved at compile time?

  - by Brent

  when I tried to compile the code: (note: func and func2 is not typo) struct S { void func2() {} }; class O { public: inline S* operator->() const; private: S* ses; }; inline S* O::operator->() const { return ses; } int main() { O object; object->func(); return 0; } there is a compile error reported: D:\code>g++ operatorp.cpp -S -o operatorp.exe operatorp.cpp: In function `int main()': operatorp.cpp:27: error: 'struct S' has no member named 'func' it seems that invoke the overloaded function of "operator-" is done during compile time? I'd added "-S" option for compile only.

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• how to wait multiple function processing to finish

  - by user351412

  I have a problem about multiple function processing , listed as below code, the main function is btnEvalClick, I have try to use alter native 1and 2 to wait the function not move to next record before theprocessed function finish, but it does not work //private function btnEvalClick(event:Event):void { // var i:int; // for(i= 0; i < (dataArr1.length); i++) { // dispatchEvent( new FlexEvent('test') ); // callfunc1('cydatGMX'); //call function 1 // callfun2('cydatGMO'); //call function 1 // editSave(); //save record (HTTP) //## Alternative 1 //if (String(event) == 'SAVEOK') { // RecMov('next'); //move record if save = OK //} //## Alternative 2 //while (waitfc == '') // if waitfc not 'OK' continue looping //{ // z = z + 1; //} // RecMov('next'); //Move to next record to process //} //private function callfunc1(tasal:String):void { // var mySO :SharedObject; // var myDP: Array; // var i:int; // var prm:Array; // try // { // mySO = SharedObject.getLocal(tasal,'/'); // prm = mySO.data.txt.split('?'); // for(i=0; i < (prm.length - 1); i++) { // myDP = prm[i].toString().split('^'); // if ( myDP[0].toString() == String(dataArr1[dg].MatrixCDCol)){ // myDPX = myDP; // break; // } // } // } // catch (err:Error) { // Alert.show('Limit object creation fail (' + tasal + '), please retry ); // } //} //private function editSave():void //{ // var parameters:* = // { // 'CertID': CertIDCol.text, 'AssetID': AssetIDCol.text, 'CertDate': cdt, //'Ccatat': CcatatCol.text, 'CertBy': CertByCol.text, 'StatusID': StatusIDCol.text, //'UpdDate': lele, 'UpdUsr': ApplicationState.instance.luNm }; // doRequest('Update', parameters, saveItemHandler); //} //private function doRequest(method_name:String, parameters:Object, callback:Function):void // { // add the method to the parameters list // parameters['method'] = (method_name + 'ASC'); // gateway.request = parameters; // var call:AsyncToken = gateway.send(); // call.request_params = gateway.request; // call.handler = callback; // } //private function saveItemHandler(e:Object):void // { // if (e.isError) // { // Alert.show('Error: ' + e.data.error); // } // else // { // Alert.show('Record Saved..'); // waitfc = 'OK'; // dispatchEvent( new FlexEvent('SAVEOK') ); // } // }

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• Questions regarding PHPUnit mock feature

  - by Andree

  Can someone provide me a reference to a good PHPUnit mock guide? The one in the official documentation doesn't seem to be detailed enough. I need to know about the following: 1) How to expect multiple calls to a mock object's method, but each return a different sets of value? $tableMock->expects($this->exactly(2)) ->method('find') ->will($this->returnValue(2)); // I need the second call to return different value 2) How to expect a call to a mock object's method with multiple parameters?

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• HQL - row identifier for pagination

  - by anna.ruk

  Does anyone know if HQL has a keyword to identify rows such as ROWID or ROWNUM? I would like to implement pagination with HQL but I am not able to use .setMaxResult() or .setFirstResult() because I don't work with the session object directly and therefore don't use the Query object but simply create my query as a string and use the .find() method. I tried using LIMIT and OFFSET in my query, but HQL seems to be ignoring these keywords and is returning the whole result to me no matter what. I'm also not able to use Hibernate criteria because it does not have support for the "HAVING" clause that appears in my query. My last resort is to restrict the result set using the ROWNUM/ROWID keyword. Does anyone else have any other suggestions?

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• @OneToOne and @JoinColumn, auto delete null entity , doable?

  - by smallufo

  I have two Entities , with the following JPA annotations : @Entity @Table(name = "Owner") public class Owner implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "id") private long id; @OneToOne(fetch=FetchType.EAGER , cascade=CascadeType.ALL) @JoinColumn(name="Data_id") private Data Data; } @Entity @Table(name = "Data") public class Data implements Serializable { @Id private long id; } Owner and Data has one-to-one mapping , the owning side is Owner. The problem occurs when I execute : owner.setData(null) ; ownerDao.update(owner) ; The "Owner" table's Data_id becomes null , that's correct. But the "Data" row is not deleted automatically. I have to write another DataDao , and another service layer to wrap the two actions ( ownerDao.update(owner) ; dataDao.delete(data); ) Is it possible to make a data row automatically deleted when the owning Owner set it to null ?

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• .NET Free memory usage (how to prevent overallocation / release memory to the OS)

  - by Ronan Thibaudau

  I'm currently working on a website that makes large use of cached data to avoid roundtrips. At startup we get a "large" graph (hundreds of thouthands of different kinds of objects). Those objects are retrieved over WCF and deserialized (we use protocol buffers for serialization) I'm using redgate's memory profiler to debug memory issues (the memory didn't seem to fit with how much memory we should need "after" we're done initializing and end up with this report Now what we can gather from this report is that: 1) Most of the memory .NET allocated is free (it may have been rightfully allocated during deserialisation, but now that it's free, i'd like for it to return to the OS) 2) Memory is fragmented (which is bad, as everytime i refresh the cash i need to redo the memory hungry deserialisation process and this, in turn creates large object that may throw an OutOfMemoryException due to fragmentation) 3) I have no clue why the space is fragmented, because when i look at the large object heap, there are only 30 instances, 15 object[] are directly attached to the GC and totally unrelated to me, 1 is a char array also attached directly to the GC Heap, the remaining 15 are mine but are not the cause of this as i get the same report if i comment them out in code. So my question is, what can i do to go further with this? I'm not really sure what to look for in debugging / tools as it seems my memory is fragmented, but not by me, and huge amounts of free spaces are allocated by .net , which i can't release. Also please make sure you understand the question well before answering, i'm not looking for a way to free memory within .net (GC.Collect), but to free memory that is already free in .net , to the system as well as to defragment said memory. Note that a slow solution is fine, if it's possible to manually defragment the large heap i'd be all for it as i can call it at the end of RefreshCache and it's ok if it takes 1 or 2 second to run. Thanks for your help! A few notes i forgot: 1) The project is a .net 2.0 website, i get the same results running it in a .net 4 pool, idem if i run it in a .net 4 pool and convert it to .net 4 and recompile. 2) These are results of a release build, so debug build can not be the issue. 3) And this is probably quite important, i do not get these issues at all in the webdev server, only in IIS, in the webdev i get memory consumption rather close to my actual consumption (well more, but not 5-10X more!)

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• tabcontainer button postback problem

  - by yousof

  I have a dropdownlist in my web page and two command buttons and a tabcontainer. The tabcontainer does not appear after the load of page according to my code. Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not IsPostBack Then TabContainer1.Visible = False If CtvAct.GetRecords("Fill_RequestTypeTb") = True Then ReqTypeCmbo.DataSource = CtvAct.MainDataset.Tables("tbOLRequestType").DefaultView ReqTypeCmbo.DataTextField = "RequestTypeName" ReqTypeCmbo.DataValueField = "RequestTypeId" ReqTypeCmbo.DataBind() Dim itm As New ListItem itm.Text = "-- ??? ??? ????? --" itm.Value = "-1" itm.Selected = True ReqTypeCmbo.Items.Insert(0, itm) ReqTypeCmbo.SelectedIndex = 0 End If End If End Sub Protected Sub PrntCmd_Click(ByVal sender As Object, ByVal e As EventArgs) Handles PrntCmd.Click TextBox6.Text = "gggg" End Sub If I press any button after page load the button work very selecting any item from dropdownlist make the tabcontainer appear but after the tabcontainer appear, the buttons does not work (postback) how can I solve these problems

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• Have you ever seen a Java File close exception raise?

  - by Tom Brito

  Has anyone ever seen an exception raise when calling close method from any closable object?

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• Routing WCF Traffic Based on URI Domain Requested

  - by Ian Patrick Hughes

  Is there a way to route traffic to a target WCF service file based on the URL domain requested? Basically, I have a single WCF RESTful services project with 3 service files offering different endpoints. It's hosted on a single IIS6 site looking for multiple host header values on port 80. I want to route traffic to different services files whether the requester is asking for www.site1.com, www.site2.com, or www.site3.com. Seems like the sort of thing I would use a global.asax or HTTP Handler for, but I am not sure since this is a regular WCF Service Application. Even though I am on IIS6 for this project, I don't mind using a URL re-writer and wildcard mapping, if I have to. I have admin rights on the balanced servers where this will reside, I just want to know if there is a common/best practice before I start hacking my way around this.

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• using a Singleton to pass credentials in a multi-tenant application a code smell?

  - by Hans Gruber

  Currently working on a multi-tenant application that employs Shared DB/Shared Schema approach. IOW, we enforce tenant data segregation by defining a TenantID column on all tables. By convention, all SQL reads/writes must include a Where TenantID = '?' clause. Not an ideal solution, but hindsight is 20/20. Anyway, since virtually every page/workflow in our app must display tenant specific data, I made the (poor) decision at the project's outset to employ a Singleton to encapsulate the current user credentials (i.e. TenantID and UserID). My thinking at the time was that I didn't want to add a TenantID parameter to each and every method signature in my Data layer. Here's what the basic pseudo-code looks like: public class UserIdentity { public UserIdentity(int tenantID, int userID) { TenantID = tenantID; UserID = userID; } public int TenantID { get; private set; } public int UserID { get; private set; } } public class AuthenticationModule : IHttpModule { public void Init(HttpApplication context) { context.AuthenticateRequest += new EventHandler(context_AuthenticateRequest); } private void context_AuthenticateRequest(object sender, EventArgs e) { var userIdentity = _authenticationService.AuthenticateUser(sender); if (userIdentity == null) { //authentication failed, so redirect to login page, etc } else { //put the userIdentity into the HttpContext object so that //its only valid for the lifetime of a single request HttpContext.Current.Items["UserIdentity"] = userIdentity; } } } public static class CurrentUser { public static UserIdentity Instance { get { return HttpContext.Current.Items["UserIdentity"]; } } } public class WidgetRepository: IWidgetRepository{ public IEnumerable<Widget> ListWidgets(){ var tenantId = CurrentUser.Instance.TenantID; //call sproc with tenantId parameter } } As you can see, there are several code smells here. This is a singleton, so it's already not unit test friendly. On top of that you have a very tight-coupling between CurrentUser and the HttpContext object. By extension, this also means that I have a reference to System.Web in my Data layer (shudder). I want to pay down some technical debt this sprint by getting rid of this singleton for the reasons mentioned above. I have a few thoughts on what an better implementation might be, but if anyone has any guidance or lessons learned they could share, I would be much obliged.

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• Mono 2.10.5 Runtime error on Ubuntu 11.10

  - by johnluetke

  I've install mono-runtime via apt in order to run my Mono console application on Ubuntu via SSH. However, when I run the command mono myapp.exe, It exits, with no message, and my program does nothing. If I throw the -v switch to Mono, such as mono -v myapp.exe, I get about 10k lines of output (as expected, -v is verbose), with the first few lines being: converting method System.OutOfMemoryException:.ctor (string) Method System.OutOfMemoryException:.ctor (string) emitted at 0xb7052c28 to 0xb7052c4b (code length 35) [myapp.exe] converting method (wrapper runtime-invoke) <Module>:runtime_invoke_void__this___object (object,intptr,intptr,intptr) Method (wrapper runtime-invoke) <Module>:runtime_invoke_void__this___object (object,intptr,intptr,intptr) emitted at 0xb7052c68 to 0xb7052cf6 (code length 142) [myapp.exe] converting method System.SystemException:.ctor (string) I read this as the runtime throwing an OutOfMemory exception, but the machine is under no intense load, has plenty of available RAM, and is running nothing other that system processes. I've removed and reinstalled Mono countless times, and have even run the executable on other machines perfectly fine. Am I missing something completely obvious here?

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• jQuery .getJSON() Not Parsing All Objects

  - by Brad

  I'm using jQuery's .getJSON function to parse a set of search results from a Google Search Appliance. The search appliance has an xslt stylesheet that returns the results as JSON data, which I validated with both JSONLint and Curious Concept's JSON Formatter. According to FireBug, the full result set is returned from the XMLHTTPRequest, but I tried dumping the data (with jquery.dump.js) and it only ever parses back the first result. It does successfully get all the Google Search Protocol stuff, but it only ever sees one "R" object (or individual result). Has anybody had a similar problem with jQuery's .getJSON? I know it likes to fail silently if the JSON is not valid, but like I said, I validated the results with several validators and it should be good to go. Edit: Clicking this link will show you the JSON results returned for a search for the word "google": http://bigbird.uww.edu/search?client=json_frontend&proxystylesheet=json_frontend&proxyrefresh=1&output=xml_no_dtd&q=google jQuery only retrieves the first "R" object, even though all "R" objects are siblings.

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• Is there a .NET BCL class to help with hand-rolled property path binding?

  - by Wayne

  WPF and Silverlight have a data binding model whereby I can provide a Binding with a Path which comprises a dot-notation of property accessors down from a DataContext to a specific value inside a complex object graph (eg. MyDataContext.RootProperty.SubProperty.Thing.Value) I have a (non-UI) requirement to accept such a path expressed as a simple string, and to use reflection on an object which is (hopefully) of a type which exposes the right property getters and setters in order to read and/or write values to those properties. Before I go off and start writing the parser and reflection code, is there a handy Framework 3.5 BCL class to help with this?

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• Can I Automap a tree hierarchy with Fluent NHibernate?

  - by NakChak

  Is it possible to auto map a simple nested object structure? Something like this: public class Employee : Entity { public Employee() { this.Manages = new List<Employee>(); } public virtual string FirstName { get; set; } public virtual string LastName { get; set; } public virtual bool IsLineManager { get; set; } public virtual Employee Manager { get; set; } public virtual IList<Employee> Manages { get; set; } } It causes the following error at run time: Repeated column in mapping for collection: SharpKtulu.Core.Employee.Manages column: EmployeeFk Is it possible to automap this sort of structure, or do I have override the auto mapper for this sort of structure?

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• How do I extend a WPF application using an addin-like architeture?

  - by Thiado de Arruda

  Lets say I have a WPF application that shows a ListBox with an ArrayList -populated with objects of arbitrary types- as a source, and this application is hosted in an assembly 'A'. By default the ListBox will display the custom object 'ToString' method return value. If a data template for that object type is found, the ListBox will use it for rendering. Imagine that theres another assembly 'B' that references of 'A' and seeks to extend it by providing custom data templates for certain types, to be used in that ListBox. Is there some way to do that without 'A'being aware of B?

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• Best approch to dynamically filter .net objects

  - by maxba

  The project i´m working currently on has a way to define a filter to filter objects from a database. This filter is a pretty straitforward class containing filtercriteria that will be combined to a sql where-clause. The goal now is to use this filter class to filter .net objects as well. So the filter for example defines, that the title property of the object that it is applied to must contain some userdefined string etc. What are ways to approch this problem? What should the filter return instead of the sql where-clause and how can it be applied to the object? I´m thinking about this for hours and don´t yet have even a slight idea how to solve this. Been thinking about reflection, dynamic code execution, building expressions but still haven´t found an acutal starting point.

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• How to approach copying objects with smart pointers as class attributes?

  - by tomislav-maric

  From the boost library documentation I read this: Conceptually, smart pointers are seen as owning the object pointed to, and thus responsible for deletion of the object when it is no longer needed. I have a very simple problem: I want to use RAII for pointer attributes of a class that is Copyable and Assignable. The copy and assignment operations should be deep: every object should have its own copy of the actual data. Also, RTTI needs to be available for the attributes (their type may also be determined at runtime). Should I be searching for an implementation of a Copyable smart pointer (the data are small, so I don't need Copy on Write pointers), or do I delegate the copy operation to the copy constructors of my objects as shown in this answer? Which smart pointer do I choose for simple RAII of a class that is copyable and assignable? (I'm thinking that the unique_ptr with delegated copy/assignment operations to the class copy constructor and assignment operator would make a proper choice, but I am not sure) Here's a pseudocode for the problem using raw pointers, it's just a problem description, not a running C++ code: // Operation interface class ModelOperation { public: virtual void operate = (); }; // Implementation of an operation called Special class SpecialModelOperation : public ModelOperation { private: // Private attributes are present here in a real implementation. public: // Implement operation void operate () {}; }; // All operations conform to ModelOperation interface // These are possible operation names: // class MoreSpecialOperation; // class DifferentOperation; // Concrete model with different operations class MyModel { private: ModelOperation* firstOperation_; ModelOperation* secondOperation_; public: MyModel() : firstOperation_(0), secondOperation_(0) { // Forgetting about run-time type definition from input files here. firstOperation_ = new MoreSpecialOperation(); secondOperation_ = new DifferentOperation(); } void operate() { firstOperation_->operate(); secondOperation_->operate(); } ~MyModel() { delete firstOperation_; firstOperation_ = 0; delete secondOperation_; secondOperation_ = 0; } }; int main() { MyModel modelOne; // Some internal scope { // I want modelTwo to have its own set of copied, not referenced // operations, and at the same time I need RAII to work for it, // as soon as it goes out of scope. MyModel modelTwo (modelOne); } return 0; }

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