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  • Haskell typeclass

    - by Geoff
    I have a Haskell typeclass question. I can't munge the syntax to get this (seemingly reasonable) program to compile under GHC. import Control.Concurrent.MVar blah1 :: [a] -> IO ([a]) blah1 = return blah2 :: [a] -> IO (MVar [a]) blah2 = newMVar class Blah b where blah :: [a] -> IO (b a) instance Blah [] where blah = blah1 -- BOOM instance Blah (MVar []) where blah = blah2 main :: IO () main = do putStrLn "Ok" I get the following error message, which kind of makes sense, but I don't know how to fix it: `[]' is not applied to enough type arguments Expected kind `*', but `[]' has kind `* -> *' In the type `MVar []' In the instance declaration for `Blah (MVar [])'

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  • Singleton class design in C#, are these two classes equivalent?

    - by Oskar
    I was reading up on singleton class design in C# on this great resource and decided to go with alternative 4: public sealed class Singleton1 { static readonly Singleton1 _instance = new Singleton1(); static Singleton1() { } Singleton1() { } public static Singleton1 Instance { get { return _instance; } } } Now I wonder if this can be rewritten using auto properties like this? public sealed class Singleton2 { static Singleton2() { Instance = new Singleton2(); } Singleton2() { } public static Singleton2 Instance { get; private set; } } If its only a matter of readability I definitely prefer the second version, but I want to get it right.

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  • JBoss Seam: components injected into POJOs, but not Session Beans

    - by purecharger
    I have a Seam component that handles login, with the name "authenticator": @Name("authenticator") public class AuthenticatorAction implements Authenticator { @PersistenceContext private EntityManager em; @In(required=false) @Out(required=false, scope = SESSION) private User user; public boolean authenticate(){ ... } } This works just fine, Seam injects the EntityManager instance. However, as soon as I add the @Stateless annotation, none of the injection happens! In this case, the EntityManager instance is null upon entry to the authenticate() method. Another interesting note is that with a separate stateful session bean I have, the Logger instance in that class is only injected if I make it static. If i have it non-static, it is not injected. Thats fine for the logger, but for stateless session beans like that, I obviously can't have static member variables for these components. I'm confused because this authenticator is exactly how it is in the Seam booking example: a stateless session bean with a private member variable being injected. Any ideas?

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  • iPhone -- initialization partly by NSKeyedUnarchiver and partly by other means

    - by William Jockusch
    I have an object myObj, which is an instance of a class MyClass. Some of its instance variables always have their initial values passed in by the calling code. Other instance variables will be initialized in one of two ways. For an instanceArray of type NSMutableArray, the possibilities are either instanceArray = [[NSMutableArray alloc]init]; or instanceArray = [someKeyedUnarchiver decodeObjectForKey: kInstanceArrayKey]; The calling code should determine which of the above will be used. Any particular design pattern I should prefer?

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  • unable to inject seam cache provider

    - by Joshua
    Env: Seam 2.2, ehcache-core 2.1.0 I tried injecting the CacheProvider using the following call in my bean scoped for session @In CacheProvider cacheProvider; WEB-INF\components.xml contains the following line to enable the cache provider <cache:eh-cache-provider/> The above configuration seems to return a null value for the cache provider Using the cache provider like this CacheProvider cacheProvider = CacheProvider.instance(); throws the following warning 15:29:27,586 WARN [CacheManager] Creating a new instance of CacheManager using the diskStorePath "C:\DOCUME~1\user5\LOCALS~1\Temp\" which is already used by an existing CacheManager. The source of the configuration was net.sf.ehcache.config.generator.Configuratio nSource$DefaultConfigurationSource@15ed0f9. The diskStore path for this CacheManager will be set to C:\DOCUME~1\user5\LOCALS ~1\Temp\\ehcache_auto_created_1276682367586. To avoid this warning consider using the CacheManager factory methods to create a singleton CacheManager or specifying a separate ehcache configuration (ehcache .xml) for each CacheManager instance. What am I missing here?

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  • ASP.Net Web Site Project vs. Web Application Project

    - by user144612
    I'm trying to convince my co-workers to switch from a web site project to a web application project, because I want the use of the project file. However I can't diffuse this argument against: The web site project allows each page to be compiled into a single dll. Their argument is this enables easy fixing of errors found after publishing. This is contrast to how the web application project compiles all code behind into a single dll. Is updating a single page's dll essentially different to updating the entire site's dll? Is there some way to compile each page's code behind into a seperate dll in the web application project? Are there some prohibitive (performance,memory?) costs to compiling each page's code behind into seperate dll's that we are unaware of? Why is the feature(?) to compile each page to separate dlls in web site projects and not web app projects?

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  • insertNewObjectForEntityForName: inManagedObjectContext: returning NSNumber bug?

    - by beinstein
    I'm relatively well versed in CoreData and have been using it for several years with little or no difficulty. All of a sudden I'm now dumbfounded by an error. For the life of me, I can't figure out why insertNewObjectForEntityForName:inManagedObjectContext: is all of a sudden returning some sort of strange instance of NSNumber. GDB says the returned object is of the correct custom subclass of NSManagedObject, but when I go to print a description of the NSManagedObject itself, I get the following error: *** -[NSCFNumber objectID]: unrecognized selector sent to instance 0x3f26f50 What's even stranger, is that I'm able to set some relationships and attributes using setValue:forKey: and all is good. But when I try to set once specific relationship, I get this error: *** -[NSCFNumber entity]: unrecognized selector sent to instance 0x3f26f50 Has anyone ever encountered anything like this before? I've tried clean all targets, restarting everything, even changing the model to the relationship in question is a to-one instead of a to-many. Nothing makes any difference.

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  • Sync GIT and ClearCase

    - by Senthil A Kumar
    I am currently working on ClearCase and now migrating to GIT. But we need this migration in a way that all work will be done in GIT and the data will be synced backed to ClearCase stream. We will have the same branch names and stream names in both GIT and CC, so scripting shouldn't be a problem. The problem here is, Can someone suggest which is the best model to sync CC and GIT Have all the Vobs in CC as single repo in GIT, and have the major stream in CC as various branches in GIT. - Single GIT repo (VOBS) and many branches (CC streams). - This takes up less space as VOBs are kept as single repo with many branches. Have important CC branches as independent GIT repositories and each repository having all the CC VOBs. - Many GIT repo for many CC branch - This will take up lots of space as VOBs will be replicated across. Which do you think is the best way to keep it in sync with ClearCase

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  • WCF Blocking problem with mutiple clients!!

    - by Marcel
    Hi I seem to have a blocking issue with WCF. Say I have two users and each have created their own instance of a class exposed on a WCF host using net.tcp with endpoint something like this "net.tcp://localhost:32000/SymHost/". The class is PerSession context and concurrency is reentrant. The class exposes two methods Alive() which return a bool of true straight away and an AliveWait which I inserted which does a Thread.Sleep for 4 seconds before returning true (testing purposes). Now client 1 calls AliveWait() during which time he is blocked which is fair enough but then if client 2 makes a call to Alive() on its own instance he has to wait until client 1's call is returned - this behaviour is not what I would have expected? I would have expected client 2 to carry on as if nothing has happened or is this to do with the fact that they both share the same endpoint? Can anyone explain what is going on and how I can make sure that client 2 can call its own instance uninterrupted? Any help much appreciated!

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  • Tomcat - virtualhosting - name / ip / port - based

    - by lisak
    Hey, what are the usage scenarios for these kinds of virtual hosting ? Name Based - typical tomcat virtual hosting, one HOME instance with many contexts, each as an individual host IP based / port based - multiple instances of tomcat ( how is it with performance and memory consuption?) running on IP aliases (virtual IPs) for one network adapter, usually behind http apache server that can run name based virtual hostings. Otherwise I can't figure out how would I forward requests in iptables/firewall based on IP address, which is just one. How is IP based virtual hosting done as to Tomcat and multiple instances ? I'd like to hear some usage scenarios from your experience. How are you running your applications. Cause there are applications having it's own modified classloader and they are developed in a way to run alone withing a tomcat instance. Then there are trivial applications which can run within one instance without problems. Many thanks

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  • python object AttributeError: type object 'Track' has no attribute 'title'

    - by ccwhite1
    I apologize if this is a noob question, but I can't seem to figure this one out. I have defined an object that defines a music track (NOTE: originally had the just ATTRIBUTE vs self.ATTRIBUTE. I edited those values in to help remove confusion. They had no affect on the problem) class Track(object): def __init__(self, title, artist, album, source, dest): """ Model of the Track Object Contains the followign attributes: 'Title', 'Artist', 'Album', 'Source', 'Dest' """ self.atrTitle = title self.atrArtist = artist self.atrAlbum = album self.atrSource = source self.atrDest = dest I use ObjectListView to create a list of tracks in a specific directory ....other code.... self.aTrack = [Track(sTitle,sArtist,sAlbum,sSource, sDestDir)] self.TrackOlv.AddObjects(self.aTrack) ....other code.... Now I want to iterate the list and print out a single value of each item list = self.TrackOlv.GetObjects() for item in list: print item.atrTitle This fails with the error AttributeError: type object 'Track' has no attribute 'atrTitle' What really confuses me is if I highlight a single item in the Object List View display and use the following code, it will correctly print out the single value for the highlighted item list = self.TrackOlv.GetSelectedObject() print list.atrTitle

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  • Good way to edit the previous defined class in ipython

    - by leo
    Hi, I am wondering a good way to follow if i would like to redefine the members of a previous defined class in ipython. say : I have defined a class intro like below, and later i want to redefine part of the function definition _print_api. Any way to do that without retyping it . class intro(object): def _print_api(self,obj): def _print(key): if key.startswith('_'): return '' value = getattr(obj,key) if not hasattr(value,im_func): doc = type(valuee).__name__ else: if value.__doc__ is None: doc = 'no docstring' else: doc = value.__doc__ return ' %s :%s' %(key,doc) res = [_print(element) for element in dir(obj)] return '\n'.join([element for element in res if element != '']) def __get__(self,instance,klass): if instance is not None: return self._print(instance) else: return self._print_api(klass)

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  • SQL bottleneck, how to fix

    - by masfenix
    This is related to my previous thread: http://stackoverflow.com/questions/3069806/sql-query-takes-about-10-20-minutes However, I kinda figured out the problem. The problem (as described in the previous thread) is not the insert (while its still slow), the problem is looping through the data itself Consider the following code: Dim rs As DAO.Recordset Dim sngStart As Single, sngEnd As Single Dim sngElapsed As Single Set rs = CurrentDb().QueryDefs("select-all").OpenRecordset MsgBox "All records retreived" sngStart = Timer Do While Not rs.EOF rs.MoveNext Loop sngEnd = Timer sngElapsed = Format(sngEnd - sngStart, "Fixed") ' Elapsed time. MsgBox ("The query took " & sngElapsed _ & " seconds to run.") As you can see, this loop does NOTHING. You'd expect it to finish in seconds, however it takes about 857 seconds to run (or 15 minutes). I dont know why it is so slow. Maybe the lotusnotes sql driver? any other ideas? (java based solution, any other solution) What my goal is: To get all the data from remote server and insert into local access table

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  • How can I easily get a TextReader from an XDocument?

    - by Mark Seemann
    Given an XDocument instance, how can I easily get a TextReader that represents that instance? The best I've been able to come up with is something like this (where xml is an XDocument instance): var s = new MemoryStream(); var sw = new StreamWriter(s); xml.Save(sw); sw.Flush(); s.Position = 0; TextReader tr = new StreamReader(s); However, this seems a little clunky, so I was wondering if there's an easier way?

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  • Multiple records with one request in RESTful system

    - by keithjgrant
    All the examples I've seen regarding a RESTful architecture have dealt with a single record. For example, a GET request to mydomain.com/foo/53 to get foo 53 or a POST to mydomain.com/foo to create a new Foo. But what about multiple records? Being able to request a series of Foos by id or post an array of new Foos generally would be more efficient with a single API request rather than dozens of individual requests. Would you "overload" mydomain.com/foo to handle requests for both a single or multiple records? Or would you add a mydomain.com/foo-multiple to handle plural POSTs and GETs? I'm designing a system that may potentially need to get many records at once (something akin to mydomain.com/foo/53,54,66,86,87) But since I haven't seen any examples of this, I'm wondering if there's something I'm just not getting about a RESTful architecture that makes this approach "wrong".

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  • Drupal: Content in blocks from node_reference fields?

    - by Marco
    After only a few weeks of working with Drupal I've come up with a recurring problem, which I don't really have an optimal solution to, so I'm hoping that someone here might be able to give some best practice pointers. What I have is a region inside my node.tpl.php, which is populated with blocks that display content from two different CCK fields of the type node_reference. This works fine when displaying a single node. The problem appears when I need to use a view. For example, lets say I have a news listing, and a single news item view. When I display the single news item I can use the news node node_reference field to reference whatever material I would like to have in my sidebar, but when on the news listing view I would like to reference nodes separately. What would be the best practice to solve this? I'm having a few ideas, but none seem like the logical choice, how would you do?

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  • Retrieving accessors in IronRuby

    - by rsteckly
    I'm trying to figure out how to retrieve the value stored in the Person class. The problem is just that after I define an instance of the Person class, I don't know how to retrieve it within the IronRuby code because the instance name is in the .NET part. /*class Person attr_accessor :name def initialize(strname) self.name=strname end end*/ //We start the DLR, in this case starting the Ruby version ScriptEngine engine = IronRuby.Ruby.CreateEngine(); ScriptScope scope = engine.ExecuteFile("c:\\Users\\ron\\RubymineProjects\\untitled\\person.rb"); //We get the class type object person = engine.Runtime.Globals.GetVariable("Person"); //We create an instance object marcy = engine.Operations.CreateInstance(person, "marcy");

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  • call method in a subclass of UIView

    - by rdesign
    Hey, I've got a UIViewController and an own class, a subclass of UIView. In my ViewController I make a instance of the uiview. If I tap the uiview a function gets called within it and an overlay appears. TO get rid of that overlay later the user has to tap somewhere on the screen(besides the instance of my class) How do I tell my class to dismiss the overlay? I already thought of delegate. So my thoughts were to make a MyUIViewControllerdelegate. If my viewcontroller receives a tap the delegate should be called. THe only problem is how do I tell my subclass that it should receive that delegate? I Have no instance of my viewcontroller in my subclass so I can not set the delegate. Any Ideas? Hope my problem is clear :) Thanks a lot

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  • No persister for: <ClassName> issue with Fluent NHibernate

    - by Amit
    I have following code: //AutoMapConfig.cs using System; using FluentNHibernate.Automapping; namespace SimpleFNH.AutoMap { public class AutoMapConfig : DefaultAutomappingConfiguration { public override bool ShouldMap(Type type) { return type.Namespace == "Examples.FirstAutomappedProject.Entities"; } } } //CascadeConvention.cs using FluentNHibernate.Conventions; using FluentNHibernate.Conventions.Instances; namespace SimpleFNH.AutoMap { public class CascadeConvention : IReferenceConvention, IHasManyConvention, IHasManyToManyConvention { public void Apply(IManyToOneInstance instance) { instance.Cascade.All(); } public void Apply(IOneToManyCollectionInstance instance) { instance.Cascade.All(); } public void Apply(IManyToManyCollectionInstance instance) { instance.Cascade.All(); } } } //Item.cs namespace SimpleFNH.Entities { public class Item { public virtual long ID { get; set; } public virtual string ItemName { get; set; } public virtual string Description { get; set; } public virtual OrderItem OrderItem { get; set; } } } //OrderItem.cs namespace SimpleFNH.Entities { public class OrderItem { public virtual long ID { get; set; } public virtual int Quantity { get; set; } public virtual Item Item { get; set; } public virtual ProductOrder ProductOrder { get; set; } public virtual void AddItem(Item item) { item.OrderItem = this; } } } using System; using System.Collections.Generic; //ProductOrder.cs namespace SimpleFNH.Entities { public class ProductOrder { public virtual long ID { get; set; } public virtual DateTime OrderDate { get; set; } public virtual string CustomerName { get; set; } public virtual IList<OrderItem> OrderItems { get; set; } public ProductOrder() { OrderItems = new List<OrderItem>(); } public virtual void AddOrderItems(params OrderItem[] items) { foreach (var item in items) { OrderItems.Add(item); item.ProductOrder = this; } } } } //NHibernateRepo.cs using FluentNHibernate.Cfg; using FluentNHibernate.Cfg.Db; using NHibernate; using NHibernate.Criterion; using NHibernate.Tool.hbm2ddl; namespace SimpleFNH.Repository { public class NHibernateRepo { private static ISessionFactory _sessionFactory; private static ISessionFactory SessionFactory { get { if (_sessionFactory == null) InitializeSessionFactory(); return _sessionFactory; } } private static void InitializeSessionFactory() { _sessionFactory = Fluently.Configure().Database( MsSqlConfiguration.MsSql2008.ConnectionString( @"server=Amit-PC\SQLEXPRESS;database=SimpleFNH;Trusted_Connection=True;").ShowSql()). Mappings(m => m.FluentMappings.AddFromAssemblyOf<Order>()).ExposeConfiguration( cfg => new SchemaExport(cfg).Create(true, true)).BuildSessionFactory(); } public static ISession OpenSession() { return SessionFactory.OpenSession(); } } } //Program.cs using System; using System.Collections.Generic; using System.Linq; using SimpleFNH.Entities; using SimpleFNH.Repository; namespace SimpleFNH { class Program { static void Main(string[] args) { using (var session = NHibernateRepo.OpenSession()) { using (var transaction = session.BeginTransaction()) { var item1 = new Item { ItemName = "item 1", Description = "test 1" }; var item2 = new Item { ItemName = "item 2", Description = "test 2" }; var item3 = new Item { ItemName = "item 3", Description = "test 3" }; var orderItem1 = new OrderItem { Item = item1, Quantity = 2 }; var orderItem2 = new OrderItem { Item = item2, Quantity = 4 }; var orderItem3 = new OrderItem { Item = item3, Quantity = 5 }; var productOrder = new ProductOrder { CustomerName = "Amit", OrderDate = DateTime.Now, OrderItems = new List<OrderItem> { orderItem1, orderItem2, orderItem3 } }; productOrder.AddOrderItems(orderItem1, orderItem2, orderItem3); session.Save(productOrder); transaction.Commit(); } } using (var session = NHibernateRepo.OpenSession()) { // retreive all stores and display them using (session.BeginTransaction()) { var orders = session.CreateCriteria(typeof(ProductOrder)) .List<ProductOrder>(); foreach (var item in orders) { Console.WriteLine(item.OrderItems.First().Quantity); } } } } } } I tried many variations to get it working but i get an error saying No persister for: SimpleFNH.Entities.ProductOrder Can someone help me get it working? I wanted to create a simple program which will set a pattern for my bigger project but it is taking quite a lot of time than expected. It would be rally helpful if you can explain in simple terms on any template/pattern that i can use to get fluent nHibernate working. The above code uses auto mapping, which i tried after i tried with fluent mapping.

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  • XForms: set relevancy for a list

    - by Purni
    I have a list element in my model instance. I am using Orbeon XForms. <mypage> <list name='mylist'/> <status /> </mypage> Status can be Private or Public. In xforms:binding, I want to set relevant attribute for showing/hiding the list. The list is bound to a drop-down. If status is Private I want to show the list, if status is Public I want to hide the list. I tried the following and it does not work. <xforms:bind nodeset="instance('myinstance')/list[@name='mylist']" relevant="instance('myinstance')/status='Private'" />

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  • [StructureMap] Xml configuration or Configuration through code?

    - by Amith George
    I personally like the option to configure StructureMap from C# code. From what I understand, one of the advantages of DI, is that we can easily swap in a new concrete instance. But, if the configuration is defined in code, then the concrete instances are hardcoded in the dll. So, practically, its as good as having hard coded the dependencies, right? I know, during testing it makes life easier... My point is, wouldnt it be better to use xml configuration instead? you want to plugin a new concrete instance? simply have your installer overwrite the structuremap.config file with the new one. So, what is the preferred way to configure StructureMap? Extra: Am forced to use C# configuration for the time being because I dont know how to pass the connection string to instance. I can write the connectionstring in the config file, but i would like to reuse the connectionstring defined in app.config.

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  • Help needed with Javascript Variable Scope / OOP and Call Back Functions

    - by gargantaun
    I think this issue goes beyond typical variable scope and closure stuff, or maybe I'm an idiot. Here goes anyway... I'm creating a bunch of objects on the fly in a jQuery plugin. The object look something like this function WedgePath(canvas){ this.targetCanvas = canvas; this.label; this.logLabel = function(){ console.log(this.label) } } the jQuery plugin looks something like this (function($) { $.fn.myPlugin = function() { return $(this).each(function() { // Create Wedge Objects for(var i = 1; i <= 30; i++){ var newWedge = new WedgePath(canvas); newWedge.label = "my_wedge_"+i; globalFunction(i, newWedge]); } }); } })(jQuery); So... the plugin creates a bunch of wedgeObjects, then calls 'globalFunction' for each one, passing in the latest WedgePath instance. Global function looks like this. function globalFunction(indicator_id, pWedge){ var targetWedge = pWedge; targetWedge.logLabel(); } What happens next is that the console logs each wedges label correctly. However, I need a bit more complexity inside globalFunction. So it actually looks like this... function globalFunction(indicator_id, pWedge){ var targetWedge = pWedge; someSql = "SELECT * FROM myTable WHERE id = ?"; dbInterface.executeSql(someSql, [indicator_id], function(transaction, result){ targetWedge.logLabel(); }) } There's a lot going on here so i'll explain. I'm using client side database storage (WebSQL i call it). 'dbInterface' an instance of a simple javascript object I created which handles the basics of interacting with a client side database [shown at the end of this question]. the executeSql method takes up to 4 arguments The SQL String an optional arguments array an optional onSuccess handler an optional onError handler (not used in this example) What I need to happen is: When the WebSQL query has completed, it takes some of that data and manipulates some attribute of a particular wedge. But, when I call 'logLabel' on an instance of WedgePath inside the onSuccess handler, I get the label of the very last instance of WedgePath that was created way back in the plugin code. Now I suspect that the problem lies in the var newWedge = new WedgePath(canvas); line. So I tried pushing each newWedge into an array, which I thought would prevent that line from replacing or overwriting the WedgePath instance at every iteration... wedgeArray = []; // Inside the plugin... for(var i = 1; i <= 30; i++){ var newWedge = new WedgePath(canvas); newWedge.label = "my_wedge_"+i; wedgeArray.push(newWedge); } for(var i = 0; i < wedgeArray.length; i++){ wedgeArray[i].logLabel() } But again, I get the last instance of WedgePath to be created. This is driving me nuts. I apologise for the length of the question but I wanted to be as clear as possible. END ============================================================== Also, here's the code for dbInterface object should it be relevant. function DatabaseInterface(db){ var DB = db; this.sql = function(sql, arr, pSuccessHandler, pErrorHandler){ successHandler = (pSuccessHandler) ? pSuccessHandler : this.defaultSuccessHandler; errorHandler = (pErrorHandler) ? pErrorHandler : this.defaultErrorHandler; DB.transaction(function(tx){ if(!arr || arr.length == 0){ tx.executeSql(sql, [], successHandler, errorHandler); }else{ tx.executeSql(sql,arr, successHandler, errorHandler) } }); } // ---------------------------------------------------------------- // A Default Error Handler // ---------------------------------------------------------------- this.defaultErrorHandler = function(transaction, error){ // error.message is a human-readable string. // error.code is a numeric error code console.log('WebSQL Error: '+error.message+' (Code '+error.code+')'); // Handle errors here var we_think_this_error_is_fatal = true; if (we_think_this_error_is_fatal) return true; return false; } // ---------------------------------------------------------------- // A Default Success Handler // This doesn't do anything except log a success message // ---------------------------------------------------------------- this.defaultSuccessHandler = function(transaction, results) { console.log("WebSQL Success. Default success handler. No action taken."); } }

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  • Implementing a configurable factory

    - by Decko
    I'm having difficulties finding out how to implement a 'configurable' behavior in a factory class in PHP. I've got at class, which takes another class as an argument in its constructor. The argument class could take a number of arguments in its constructor. An instance of my main class could look something like this $instance = new MyClass(new OtherClass(20, true)); $instance2 = new MyClass(new DifferentClass('test')); This is rather clumsy and has a number of problems and therefore I would like to move this into a factory class. The problem is that this factory somehow needs to know how to instantiate the argument class, as this class can have any number of arguments in the constructor. Preferably I would like to be able to do something like this $instance = Factory::build('OtherClass'); $instance2 = Factory::build('DifferentClass'); And let the factory retrieve the arguments from a configuration array or similar. Is there a proper solution to this problem?

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  • How to define the order with ImportMany attribute?

    - by JD
    Hi to all, I am just getting into MEF and was wondering how you could define the order of collection exported with [ImportMany]? What I mean here is if I had two classes (Class1, Class2) that implement the interface IService and each of the implementations are in two different libraries (although they could be in the same), I want the Class2 instance to be created before the Class1 instance in the IEnumerable collection defined by the ImportMany attribute. So it is like a pipeline of functionality where Class2 calls are made before Class1 calls. Also, I have an another Class (Class3 which also implements IService) in another library, which I want introduced later on (i.e. some logging utility), how do I make this the 3rd instance in the ImportMany collection? JD

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  • Setting a breakpoint in a T4 template

    - by Dave Swersky
    I'm trying to debug the execution of a T4 template in Visual Studio 2008. All the information I'm finding on debugging T4 templates in Visual Studio 2008 say that you can set a breakpoint (red dot) in the template as if it were a regular code file. I have the Clarius T4 code highlighter installed, so my T4 template is colored, but I can't set a breakpoint. When I click in the margin nothing happens. I've tried Debugger.Break(), and it launches a new instance of VS.NET, but it can't load the code from my template. I get a dialog that says "There is no source code available for the current location." This happens if I have the same project loaded in the another instance of if I spin up a new instance. What gives?

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