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  • Entity Framework self referencing entity deletion.

    - by Viktor
    Hello. I have a structure of folders like this: Folder1 Folder1.1 Folder1.2 Folder2 Folder2.1 Folder2.1.1 and so on.. The question is how to cascade delete them(i.e. when remove folder2 all children are also deleted). I can't set an ON DELETE action because MSSQL does not allow it. Can you give some suggesions? UPDATE: I wrote this stored proc, can I just leave it or it needs some modifications? SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE PROCEDURE sp_DeleteFoldersRecursive @parent_folder_id int AS BEGIN SET NOCOUNT ON; IF @parent_folder_id = 0 RETURN; CREATE TABLE #temp(fid INT ); DECLARE @Count INT; INSERT INTO #temp(fid) SELECT FolderId FROM Folders WHERE FolderId = @parent_folder_id; SET @Count = @@ROWCOUNT; WHILE @Count > 0 BEGIN INSERT INTO #temp(fid) SELECT FolderId FROM Folders WHERE EXISTS (SELECT FolderId FROM #temp WHERE Folders.ParentId = #temp.fid) AND NOT EXISTS (SELECT FolderId FROM #temp WHERE Folders.FolderId = #temp.fid); SET @Count = @@ROWCOUNT; END DELETE Folders FROM Folders INNER JOIN #temp ON Folders.FolderId = #temp.fid; DROP TABLE #temp; END GO

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  • Entity Framework version 1- Brief Synopsis and Tips &ndash; Part 1

    - by Rohit Gupta
    To Do Eager loading use Projections (for e.g. from c in context.Contacts select c, c.Addresses)  or use Include Query Builder Methods (Include(“Addresses”)) If there is multi-level hierarchical Data then to eager load all the relationships use Include Query Builder methods like customers.Include("Order.OrderDetail") to include Order and OrderDetail collections or use customers.Include("Order.OrderDetail.Location") to include all Order, OrderDetail and location collections with a single include statement =========================================================================== If the query uses Joins then Include() Query Builder method will be ignored, use Nested Queries instead If the query does projections then Include() Query Builder method will be ignored Use Address.ContactReference.Load() OR Contact.Addresses.Load() if you need to Deferred Load Specific Entity – This will result in extra round trips to the database ObjectQuery<> cannot return anonymous types... it will return a ObjectQuery<DBDataRecord> Only Include method can be added to Linq Query Methods Any Linq Query method can be added to Query Builder methods. If you need to append a Query Builder Method (other than Include) after a LINQ method  then cast the IQueryable<Contact> to ObjectQuery<Contact> and then append the Query Builder method to it =========================================================================== Query Builder methods are Select, Where, Include Methods which use Entity SQL as parameters e.g. "it.StartDate, it.EndDate" When Query Builder methods do projection then they return ObjectQuery<DBDataRecord>, thus to iterate over this collection use contact.Item[“Name”].ToString() When Linq To Entities methods do projection, they return collection of anonymous types --- thus the collection is strongly typed and supports Intellisense EF Object Context can track changes only on Entities, not on Anonymous types. If you use a Defining Query for a EntitySet then the EntitySet becomes readonly since a Defining Query is the same as a View (which is treated as a ReadOnly by default). However if you want to use this EntitySet for insert/update/deletes then we need to map stored procs (as created in the DB) to the insert/update/delete functions of the Entity in the Designer You can use either Execute method or ToList() method to bind data to datasources/bindingsources If you use the Execute Method then remember that you can traverse through the ObjectResult<> collection (returned by Execute) only ONCE. In WPF use ObservableCollection to bind to data sources , for keeping track of changes and letting EF send updates to the DB automatically. Use Extension Methods to add logic to Entities. For e.g. create extension methods for the EntityObject class. Create a method in ObjectContext Partial class and pass the entity as a parameter, then call this method as desired from within each entity. ================================================================ DefiningQueries and Stored Procedures: For Custom Entities, one can use DefiningQuery or Stored Procedures. Thus the Custom Entity Collection will be populated using the DefiningQuery (of the EntitySet) or the Sproc. If you use Sproc to populate the EntityCollection then the query execution is immediate and this execution happens on the Server side and any filters applied will be applied in the Client App. If we use a DefiningQuery then these queries are composable, meaning the filters (if applied to the entityset) will all be sent together as a single query to the DB, returning only filtered results. If the sproc returns results that cannot be mapped to existing entity, then we first create the Entity/EntitySet in the CSDL using Designer, then create a dummy Entity/EntitySet using XML in the SSDL. When creating a EntitySet in the SSDL for this dummy entity, use a TSQL that does not return any results, but does return the relevant columns e.g. select ContactID, FirstName, LastName from dbo.Contact where 1=2 Also insure that the Entity created in the SSDL uses the SQL DataTypes and not .NET DataTypes. If you are unable to open the EDMX file in the designer then note the Errors ... they will give precise info on what is wrong. The Thrid option is to simply create a Native Query in the SSDL using <Function Name="PaymentsforContact" IsComposable="false">   <CommandText>SELECT ActivityId, Activity AS ActivityName, ImagePath, Category FROM dbo.Activities </CommandText></FuncTion> Then map this Function to a existing Entity. This is a quick way to get a custom Entity which is regular Entity with renamed columns or additional columns (which are computed columns). The disadvantage to using this is that It will return all the rows from the Defining query and any filter (if defined) will be applied only at the Client side (after getting all the rows from DB). If you you DefiningQuery instead then we can use that as a Composable Query. The Fourth option (for mapping a READ stored proc results to a non-existent Entity) is to create a View in the Database which returns all the fields that the sproc also returns, then update the Model so that the model contains this View as a Entity. Then map the Read Sproc to this View Entity. The other option would be to simply create the View and remove the sproc altogether. ================================================================ To Execute a SProc that does not return a entity, use a EntityCommand to execute that proc. You cannot call a sproc FunctionImport that does not return Entities From Code, the only way is to use SSDL function calls using EntityCommand.  This changes with EntityFramework Version 4 where you can return Scalar Types, Complex Types, Entities or NonQuery ================================================================ UDF when created as a Function in SSDL, we need to set the Name & IsComposable properties for the Function element. IsComposable is always false for Sprocs, for UDF's set this to true. You cannot call UDF "Function" from within code since you cannot import a UDF Function into the CSDL Model (with Version 1 of EF). only stored procedures can be imported and then mapped to a entity ================================================================ Entity Framework requires properties that are involved in association mappings to be mapped in all of the function mappings for the entity (Insert, Update and Delete). Because Payment has an association to Reservation... hence we need to pass both the paymentId and reservationId to the Delete sproc even though just the paymentId is the PK on the Payment Table. ================================================================ When mapping insert, update and delete procs to a Entity, insure that all the three or none are mapped. Further if you have a base class and derived class in the CSDL, then you must map (ins, upd, del) sprocs to all parent and child entities in the inheritance relationship. Note that this limitation that base and derived entity methods must all must be mapped does not apply when you are mapping Read Stored Procedures.... ================================================================ You can write stored procedures SQL directly into the SSDL by creating a Function element in the SSDL and then once created, you can map this Function to a CSDL Entity directly in the designer during Function Import ================================================================ You can do Entity Splitting such that One Entity maps to multiple tables in the DB. For e.g. the Customer Entity currently derives from Contact Entity...in addition it also references the ContactPersonalInfo Entity. One can copy all properties from the ContactPersonalInfo Entity into the Customer Entity and then Delete the CustomerPersonalInfo entity, finall one needs to map the copied properties to the ContactPersonalInfo Table in Table Mapping (by adding another table (ContactPersonalInfo) to the Table Mapping... this is called Entity Splitting. Thus now when you insert a Customer record, it will automatically create SQL to insert records into the Contact, Customers and ContactPersonalInfo tables even though you have a Single Entity called Customer in the CSDL =================================================================== There is Table by Type Inheritance where another EDM Entity can derive from another EDM entity and absorb the inherted entities properties, for example in the Break Away Geek Adventures EDM, the Customer entity derives (inherits) from the Contact Entity and absorbs all the properties of Contact entity. Thus when you create a Customer Entity in Code and then call context.SaveChanges the Object Context will first create the TSQL to insert into the Contact Table followed by a TSQL to insert into the Customer table =================================================================== Then there is the Table per Hierarchy Inheritance..... where different types are created based on a condition (similar applying a condition to filter a Entity to contain filtered records)... the diference being that the filter condition populates a new Entity Type (derived from the base Entity). In the BreakAway sample the example is Lodging Entity which is a Abstract Entity and Then Resort and NonResort Entities which derive from Lodging Entity and records are filtered based on the value of the Resort Boolean field =================================================================== Then there is Table per Concrete Type Hierarchy where we create a concrete Entity for each table in the database. In the BreakAway sample there is a entity for the Reservation table and another Entity for the OldReservation table even though both the table contain the same number of fields. The OldReservation Entity can then inherit from the Reservation Entity and configure the OldReservation Entity to remove all Scalar Properties from the Entity (since it inherits the properties from Reservation and filters based on ReservationDate field) =================================================================== Complex Types (Complex Properties) Entities in EF can also contain Complex Properties (in addition to Scalar Properties) and these Complex Properties reference a ComplexType (not a EntityType) DropdownList, ListBox, RadioButtonList, CheckboxList, Bulletedlist are examples of List server controls (not data bound controls) these controls cannot use Complex properties during databinding, they need Scalar Properties. So if a Entity contains Complex properties and you need to bind those to list server controls then use projections to return Scalar properties and bind them to the control (the disadvantage is that projected collections are not tracked by the Object Context and hence cannot persist changes to the projected collections bound to controls) ObjectDataSource and EntityDataSource do account for Complex properties and one can bind entities with Complex Properties to Data Source controls and they will be tracked for changes... with no additional plumbing needed to persist changes to these collections bound to controls So DataBound controls like GridView, FormView need to use EntityDataSource or ObjectDataSource as a datasource for entities that contain Complex properties so that changes to the datasource done using the GridView can be persisted to the DB (enabling the controls for updates)....if you cannot use the EntityDataSource you need to flatten the ComplexType Properties using projections With EF Version 4 ComplexTypes are supported by the Designer and can add/remove/compose Complex Types directly using the Designer =================================================================== Conditional Mapping ... is like Table per Hierarchy Inheritance where Entities inherit from a base class and then used conditions to populate the EntitySet (called conditional Mapping). Conditional Mapping has limitations since you can only use =, is null and IS NOT NULL Conditions to do conditional mapping. If you need more operators for filtering/mapping conditionally then use QueryView(or possibly Defining Query) to create a readonly entity. QueryView are readonly by default... the EntitySet created by the QueryView is enabled for change tracking by the ObjectContext, however the ObjectContext cannot create insert/update/delete TSQL statements for these Entities when SaveChanges is called since it is QueryView. One way to get around this limitation is to map stored procedures for the insert/update/delete operations in the Designer. =================================================================== Difference between QueryView and Defining Query : QueryView is defined in the (MSL) Mapping File/section of the EDM XML, whereas the DefiningQuery is defined in the store schema (SSDL). QueryView is written using Entity SQL and is this database agnostic and can be used against any database/Data Layer. DefiningQuery is written using Database Lanaguage i.e. TSQL or PSQL thus you have more control =================================================================== Performance: Lazy loading is deferred loading done automatically. lazy loading is supported with EF version4 and is on by default. If you need to turn it off then use context.ContextOptions.lazyLoadingEnabled = false To improve Performance consider PreCompiling the ObjectQuery using the CompiledQuery.Compile method

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  • Using unordered_multimap as entity and component storage

    - by natebot13
    The Setup I've made a few games (more like animations) using the Object Oriented method with base classes for objects that extend them, and objects that extend those, and found I couldn't wrap my head around expanding that system to larger game ideas. So I did some research and discovered the Entity-Component system of designing games. I really like the idea, and thoroughly understood the usefulness of it after reading Byte54's perfect answer here: Role of systems in entity systems architecture. With that said, I have decided to create my current game idea using the described Entity-Component system. Having basic knowledge of C++, and SFML, I would like to implement the backbone of this entity component system using an unordered_multimap without classes for the entities themselves. Here's the idea: An unordered_mulitmap stores entity IDs as the lookup term, while the value is an inherited Component object. Examlpe: ____________________________ |ID |Component | ---------------------------- |0 |Movable | |0 |Accelable | |0 |Renderable | |1 |Movable | |1 |Renderable | |2 |Renderable | ---------------------------- So, according to this map of objects, the entity with ID 0 has three components: Movable, Accelable, and Renderable. These component objects store the entity specific data, such as the location, the acceleration, and render flags. The entity is simply and ID, with the components attached to that ID describing its attributes. Problem I want to store the component objects within the map, allowing the map have full ownership of the components. The problem I'm having, is I don't quite understand enough about pointers, shared pointers, and references in order to get that set up. How can I go about initializing these components, with their various member variables, within the unordered_multimap? Can the base component class take on the member variables of its child classes, when defining the map as unordered_multimap<int, component>? Requirements I need a system to be able to grab an entity, with all of its' attached components, and access members from the components in order to do the necessary calculations and reassignments for position, velocity, etc. Need a clarification? Post a comment with your concerns and I will gladly edit or comment back! Thanks in advance! natebot13

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  • Entity Framework won't SaveChanges on new entity with two-level relationship

    - by Tim Rourke
    I'm building an ASP.NET MVC site using the ADO.NET Entity Framework. I have an entity model that includes these entities, associated by foreign keys: Report(ID, Date, Heading, Report_Type_ID, etc.) SubReport(ID, ReportText, etc.) - one-to-one relationship with Report. ReportSource(ID, Name, Description) - one-to-many relationship with Sub_Report. ReportSourceType(ID, Name, Description) - one-to-many relationship with ReportSource. Contact (ID, Name, Address, etc.) - one-to-one relationship with Report_Source. There is a Create.aspx page for each type of SubReport. The post event method returns a new Sub_Report entity. Before, in my post method, I followed this process: Set the properties for a new Report entity from the page's fields. Set the SubReport entity's specific properties from the page's fields. Set the SubReport entity's Report to the new Report entity created in 1. Given an ID provided by the page, look up the ReportSource and set the Sub_Report entity's ReportSource to the found entity. SaveChanges. This workflow succeeded just fine for a couple of weeks. Then last week something changed and it doesn't work any more. Now instead of the save operation, I get this Exception: UpdateException: "Entities in 'DIR2_5Entities.ReportSourceSet' participate in the 'FK_ReportSources_ReportSourceTypes' relationship. 0 related 'ReportSourceTypes' were found. 1 'Report_Source_Types' is expected." The debug visualizer shows the following: The SubReport's ReportSource is set and loaded, and all of its properties are correct. The Report_Source has a valid ReportSourceType entity attached. In SQL Profiler the prepared SQL statement looks OK. Can anybody point me to what obvious thing I'm missing? TIA Notes: The Report and SubReport are always new entities in this case. The Report entity contains properties common to many types of reports and is used for generic queries. SubReports are specific reports with extra parameters varying by type. There is actually a different entity set for each type of SubReport, but this question applies to all of them, so I use SubReport as a simplified example.

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  • State / Screen management in Entity Component Systems

    - by David Lively
    My entity/component system is happily humming along and, despite some performance concerns I initially had, everything is working fine. However, I've realized that I missed a crucial point when starting this thing: how do you handle different screens? At the moment, I have a GameManager class which owns a component manager and entity manager. When I create an entity, the entity manager assigns it an ID and makes sure it's tracked. When I modify the components that are assigned to an entity. an UpdateEntity method is called, which alerts each of the systems that they may need to add or remove the entity from their respective entity lists. A problem with this is that the collection of entities operated on by each system is determined solely by the individual Systems, typically based on a "required component" filter. (An entity has to have a Renderable component to be rendered, for instance.) In this situation, I can't just keep collections of entities per screen and only Update/Draw those collections. They'd have to either be added and removed depending on their applicability to the current screen, which would cause their associated components to be removed, or enable/disable entities in a group per screen to hide what's not supposed to be visible. These approaches seem like really, really crappy kludges. What's a good way to handle this? A pretty straightforward way that comes to mind is to create a separate GameManager (which in my implementation owns all of the systems, entities, etc.) per screen, which means that everything outside of the device context would be duplicated. That's bothersome because some things are always visible, or I might want to continue to display the game under a translucent menu window. Another option would be to add a "layer" key to the GameManager class, which could be checked against a displayable layer stack held by the game manager. *System.Draw() would be called for each active layer, in the required order as determined by the stack. When the systems request an iterator for their respective entity collections, it would be pre-filtered to a (cached) set of those entities that participate in the active layer. Those collections could be updated from the same UpdateEntity event that's already used to maintain each system's entity collections. Still, kinda feels like a hack. If I've coded myself into a corner, feel free to throw tomatoes as long as they're labeled with a helpful suggestion. Hooray for learning curves.

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  • Entity Framework 4.1 Release Candidate Released

    - by shiju
    Microsoft ADO.NET team has announced the Release Candidate version of Entity Framework 4.1. You can download the  Entity Framework 4.1 Release Candidate from here . You can also use NuGet to get Entity Framework 4.1 Release Candidate. The Code First approach is available with Entity Framework 4.1.I have upgraded my ASP.NET MVC 3/EF Code First demo web app (http://efmvc.codeplex.com) to Entity Framework 4.1  version

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  • Entity Framework 4.0: My Favorite Books

    - by nannette
    I'm in the process of reading several Entity Framework 4.0 books. I'm going to recommend two such books: 1) Programming Entity Framework: Building Data Centric Apps with the ADO.NET Entity Framework by Julia Lerman 2) Entity Framework 4.0 Recipes: A Problem-Solution Approach by Larry Tenny and Zeeshan Hirani Visit these Entity Framework 4.0 Quick Start videos by Julia Lerman. The book links include numerous detailed reviews. If you can only afford one of the books, I'd recommend Julia's book as the...(read more)

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  • Many sources of movement in an entity system

    - by Sticky
    I'm fairly new to the idea of entity systems, having read a bunch of stuff (most usefully, this great blog and this answer). Though I'm having a little trouble understanding how something as simple as being able to manipualate the position of an object by an undefined number of sources. That is, I have my entity, which has a position component. I then have some event in the game which tells this entity to move a given distance, in a given time. These events can happen at any time, and will have different values for position and time. The result is that they'd be compounded together. In a traditional OO solution, I'd have some sort of MoveBy class, that contains the distance/time, and an array of those inside my game object class. Each frame, I'd iterate through all the MoveBy, and apply it to the position. If a MoveBy has reached its finish time, remove it from the array. With the entity system, I'm a little confused as how I should replicate this sort of behavior. If there were just one of these at a time, instead of being able to compound them together, it'd be fairly straightforward (I believe) and look something like this: PositionComponent containing x, y MoveByComponent containing x, y, time Entity which has both a PositionComponent and a MoveByComponent MoveBySystem that looks for an entity with both these components, and adds the value of MoveByComponent to the PositionComponent. When the time is reached, it removes the component from that entity. I'm a bit confused as to how I'd do the same thing with many move by's. My initial thoughts are that I would have: PositionComponent, MoveByComponent the same as above MoveByCollectionComponent which contains an array of MoveByComponents MoveByCollectionSystem that looks for an entity with a PositionComponent and a MoveByCollectionComponent, iterating through the MoveByComponents inside it, applying/removing as necessary. I guess this is a more general problem, of having many of the same component, and wanting a corresponding system to act on each one. My entities contain their components inside a hash of component type - component, so strictly have only 1 component of a particular type per entity. Is this the right way to be looking at this? Should an entity only ever have one component of a given type at all times?

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  • What does Symfony Framework offer that Zend Framework does not?

    - by Fatmuemoo
    I have professionally working with Zend Framework for about a year. No major complaints. With some modifications, it has done a good job. I'm beginning to work on a side project where I want to heavily rely on MongoDb and Doctrine. I thought it might be a good idea to broaden my horizons and learn another enterprise level framework. There seems to be a lot a buzz about Symfony. After quickly looking over the site and documentation, I must say I came away pretty underwhelmed. I'm woundering what, if anything, Symfony has to offer that Zend doesn't? What would the advantage be in choosing Symfony?

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  • Organizing an entity system with external component managers?

    - by Gustav
    I'm designing a game engine for a top-down multiplayer 2D shooter game, which I want to be reasonably reuseable for other top-down shooter games. At the moment I'm thinking about how something like an entity system in it should be designed. First I thought about this: I have a class called EntityManager. It should implement a method called Update and another one called Draw. The reason for me separating Logic and Rendering is because then I can omit the Draw method if running a standalone server. EntityManager owns a list of objects of type BaseEntity. Each entity owns a list of components such as EntityModel (the drawable representation of an entity), EntityNetworkInterface, and EntityPhysicalBody. EntityManager also owns a list of component managers like EntityRenderManager, EntityNetworkManager and EntityPhysicsManager. Each component manager keeps references to the entity components. There are various reasons for moving this code out of the entity's own class and do it collectively instead. For example, I'm using an external physics library, Box2D, for the game. In Box2D, you first add the bodies and shapes to a world (owned by the EntityPhysicsManager in this case) and add collision callbacks (which would be dispatched to the entity object itself in my system). Then you run a function which simulates everything in the system. I find it hard to find a better solution to do this than doing it in an external component manager like this. Entity creation is done like this: EntityManager implements the method RegisterEntity(entityClass, factory) which registers how to create an entity if that class. It also implements the method CreateEntity(entityClass) which would return an object of type BaseEntity. Well now comes my problem: How would the reference to a component be registered to the component managers? I have no idea how I would reference the component managers from a factory/closure.

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  • sync Framework for Compact Framework

    - by CF_Maintainer
    Has anyone got sync framework to work on a mobile device as a sync mechanism in place of RDA or Merge replication? If yes, could you point me to any resources available. If one was to start a green field compact framework based application, what would one use as the sync mechanism (sync framework/RDA/Merge replication/any other...)? Thanks

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  • What is .Net Framework 4 extended?

    - by Click Ok
    For testing purposes, I installed .Net Framework 4 Client Profile. My tests ended and I was to uninstall it, in order to install .Net Framework 4 full. The uninstaller told me to uninstall .Net Framework 4 extended first. I've already found it and uninstalled, but the question remains: What is .Net Framework 4 extended?

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  • Entity Relationship Multiple 1:1's

    - by Evan
    I have an application where I have a generic object (table) called Hull. Each hull in the table is unique. I have another object that has three hulls, but they are specifically the Port_Hull, Center_Hull and Starboard_Hull. Rather than create a One to Many relationship, I was trying to create a one to one relationship for each one, but this results in numerous errors unless I make the relationship from Hull to Vessel one to many (which it is not). Any idea how I go about this, or should I abandon the concept and make the vessel to hull relationship one to many and deal with lists that always have three entries? p.s. Using uniqueidentifiers as many users can be adding records while disconnected. Hull Table HullID uniqueidentifier (primary key) plus bunch of hull data fields Vessel Table VesselID uniqueidentifier (primary key) MainHullID uniqueidentifier (tried as key and non-key) PortHullID uniqueidentifier StarboardHullID uniqueidentifier plus bunch of Vessel data fields

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  • Prevent Custom Entity being deleted from Entity Framework during Update Model Wizard

    - by rbg
    In Entity Framework v1 If you create a Custom Entity to map it to a Stored Procedure during FunctionImport and then Select "Update Model from Database" the Update Model Wizard removes the Custom Entity (as added Manually in the SSDL XML prior to functionImport) from the SSDL. Does anyone know if this limitation has been dealt with Entity Framework v4? I mean is there a way to prevent the Wizard from removing the Custom Entity from the Storage Schema (SSDL) during Model Update from Database????

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  • Hibernate is persisting entity during flush when the entity has not changed

    - by Preston
    I'm having a problem where the entity manger is persisting an entity that I don't think has changed during the flush. I know the following code is the problem because if I comment it out the entity doesn't persist. In this code all I'm doing is loading the entity and calling some getters. Query qry = em.createNamedQuery("Clients.findByClientID"); qry.setParameter("clientID", clientID); Clients client = (Clients) qry.getSingleResult(); results.setFname(client.getFirstName()); results.setLname(client.getLastName()); ... return results; Later in a different method I do another namedQuery which causes the entity manger to flush. For some reason the client loaded above is persisted. The reason this is a problem is because in the middle of all this, there is some old code that is making some straight JDBC changes to the client. When the entity manger persists the changes made by the straight JDBC are lost. The theory we have at moment is that the entity manger is comparing the entity to the underlying record, sees that it's different, then persists it. Can someone explain or confirm the behavior we're seeing?

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  • Entity System with C++

    - by Dono
    I'm working on a game engine using the Entity System and I have some questions. How I see Entity System : Components : A class with attributs, set and get. Sprite Physicbody SpaceShip ... System : A class with a list of components. (Component logic) EntityManager Renderer Input Camera ... Entity : Just a empty class with a list of components. What I've done : Currently, I've got a program who allow me to do that : // Create a new entity/ Entity* entity = game.createEntity(); // Add some components. entity->addComponent( new TransformableComponent() ) ->setPosition( 15, 50 ) ->setRotation( 90 ) ->addComponent( new PhysicComponent() ) ->setMass( 70 ) ->addComponent( new SpriteComponent() ) ->setTexture( "name.png" ) ->addToSystem( new RendererSystem() ); My questions Did the system stock a list of components or a list of entities ? In the case where I stock a list of entities, I need to get the component of this entities on each frame, that's probably heavy isn't it ? Did the system stock a list of components or a list of entities ? In the case where I stock a list of entities, I need to get the component of this entities on each frame, that's probably heavy isn't it ?

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  • Entity framework, adding custom entity to diagram

    - by molgan
    Hello I'm using the entity framework that comes with 3.5sp1, and I'm trying to add a custom entity that I will propulate with searchresults from a stored procedure. But I have problems with the designer....... when I pick "Add + Entity" and give it a name, and hit save, the whole diagram stops working...... blah entities namespace could not be found..... all the other entities have lost its reference or summet. Works when I add a "table" to it that exists in database. But when custom it screws everything up. How should I fix this? I've imported the function, I just need to add an entity for it... I've read http://blogs.microsoft.co.il/blogs/gilf/archive/2009/03/13/mapping-stored-procedure-results-to-a-custom-entity-in-entity-framework.aspx but I cant get to step 3 since of all the errors when saving on step 2. /M

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  • Getting MySQL work with Entity Framework 4.0

    - by DigiMortal
    Does MySQL work with Entity Framework 4.0? The answer is: yes, it works! I just put up one experimental project to play with MySQL and Entity Framework 4.0 and in this posting I will show you how to get MySQL data to EF. Also I will give some suggestions how to deploy your applications to hosting and cloud environments. MySQL stuff As you may guess you need MySQL running somewhere. I have MySQL installed to my development machine so I can also develop stuff when I’m offline. The other thing you need is MySQL Connector for .NET Framework. Currently there is available development version of MySQL Connector/NET 6.3.5 that supports Visual Studio 2010. Before you start download MySQL and Connector/NET: MySQL Community Server Connector/NET 6.3.5 If you are not big fan of phpMyAdmin then you can try out free desktop client for MySQL – HeidiSQL. I am using it and I am really happy with this program. NB! If you just put up MySQL then create also database with couple of table there. To use all features of Entity Framework 4.0 I suggest you to use InnoDB or other engine that has support for foreign keys. Connecting MySQL to Entity Framework 4.0 Now create simple console project using Visual Studio 2010 and go through the following steps. 1. Add new ADO.NET Entity Data Model to your project. For model insert the name that is informative and that you are able later recognize. Now you can choose how you want to create your model. Select “Generate from database” and click OK. 2. Set up database connection Change data connection and select MySQL Database as data source. You may also need to set provider – there is only one choice. Select it if data provider combo shows empty value. Click OK and insert connection information you are asked about. Don’t forget to click test connection button to see if your connection data is okay. If everything works then click OK. 3. Insert context name Now you should see the following dialog. Insert your data model name for application configuration file and click OK. Click next button. 4. Select tables for model Now you can select tables and views your classes are based on. I have small database with events data. Uncheck the checkbox “Include foreign key columns in the model” – it is damn annoying to get them away from model later. Also insert informative and easy to remember name for your model. Click finish button. 5. Define your classes Now it’s time to define your classes. Here you can see what Entity Framework generated for you. Relations were detected automatically – that’s why we needed foreign keys. The names of classes and their members are not nice yet. After some modifications my class model looks like on the following diagram. Note that I removed attendees navigation property from person class. Now my classes look nice and they follow conventions I am using when naming classes and their members. NB! Don’t forget to see properties of classes (properties windows) and modify their set names if set names contain numbers (I changed set name for Entity from Entity1 to Entities). 6. Let’s test! Now let’s write simple testing program to see if MySQL data runs through Entity Framework 4.0 as expected. My program looks for events where I attended. using(var context = new MySqlEntities()) {     var myEvents = from e in context.Events                     from a in e.Attendees                     where a.Person.FirstName == "Gunnar" &&                             a.Person.LastName == "Peipman"                     select e;       Console.WriteLine("My events: ");       foreach(var e in myEvents)     {         Console.WriteLine(e.Title);     } }   Console.ReadKey(); And when I run it I get the result shown on screenshot on right. I checked out from database and these results are correct. At first run connector seems to work slow but this is only the effect of first run. As connector is loaded to memory by Entity Framework it works fast from this point on. Now let’s see what we have to do to get our program work in hosting and cloud environments where MySQL connector is not installed. Deploying application to hosting and cloud environments If your hosting or cloud environment has no MySQL connector installed you have to provide MySQL connector assemblies with your project. Add the following assemblies to your project’s bin folder and include them to your project (otherwise they are not packaged by WebDeploy and Azure tools): MySQL.Data MySQL.Data.Entity MySQL.Web You can also add references to these assemblies and mark references as local so these assemblies are copied to binary folder of your application. If you have references to these assemblies then you don’t have to include them to your project from bin folder. Also add the following block to your application configuration file. <?xml version="1.0" encoding="utf-8"?> <configuration> ...   <system.data>     <DbProviderFactories>         <add              name=”MySQL Data Provider”              invariant=”MySql.Data.MySqlClient”              description=”.Net Framework Data Provider for MySQL”              type=”MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data,                   Version=6.2.0.0, Culture=neutral,                   PublicKeyToken=c5687fc88969c44d”          />     </DbProviderFactories>   </system.data> ... </configuration> Conclusion It was not hard to get MySQL connector installed and MySQL connected to Entity Framework 4.0. To use full power of Entity Framework we used InnoDB engine because it supports foreign keys. It was also easy to query our model. To get our project online we needed some easy modifications to our project and configuration files.

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  • EXC_BAD_ACCESS and KERN_INVALID_ADDRESS after intiating a print sequence.

    - by Edward M. Bergmann
    MAC G4/1.5GHz/2GB/1TB+ OS10.4.11 Start up Volume has been erased/complete reinstall with updated software. Current problem only occurs when printing to an Epson Artisan 800 [USB as well as Ethernet connected] when using Macromedia FreeHand 10.0.1.67. All other apps/printers work fine. Memory has been removed/swapped/reinstalled several times, CPU was changed from 1.5GB to 1.3GB. Page(s) will print, but application quits within a second or two after selecting "print." Apple has never replied, Epson hasn't a clue, and I am befuddled!! Perhaps there is GURU out their who and see a bigger-better picture and understands how to interpret all of this stuff. If so, it would be a terrific pleasure to get a handle on how to cure this problem or get some A M M U N I T I O N to fire in the right direction. I thank you in advance. FreeHand 10 MAC OS10.4.11 unexpectedly quits after invoking a print command, the result: Date/Time: 2010-04-20 14:23:18.371 -0700 OS Version: 10.4.11 (Build 8S165) Report Version: 4 Command: FreeHand 10 Path: /Applications/Macromedia FreeHand 10.0.1.67/FreeHand 10 Parent: WindowServer [1060] Version: 10.0.1.67 (10.0.1.67, Copyright © 1988-2002 Macromedia Inc. and its licensors. All rights reserved.) PID: 1217 Thread: 0 Exception: EXC_BAD_ACCESS (0x0001) Codes: KERN_INVALID_ADDRESS (0x0001) at 0x07d7e000 Thread 0 Crashed: 0 <<00000000>> 0xffff8a60 __memcpy + 704 (cpu_capabilities.h:189) 1 FreeHand X 0x011d2994 0x1008000 + 1878420 2 FreeHand X 0x01081da4 0x1008000 + 499108 3 FreeHand X 0x010f5474 0x1008000 + 971892 4 FreeHand X 0x010d0278 0x1008000 + 819832 5 FreeHand X 0x010fa808 0x1008000 + 993288 6 FreeHand X 0x01113608 0x1008000 + 1095176 7 FreeHand X 0x01113748 0x1008000 + 1095496 8 FreeHand X 0x01099ebc 0x1008000 + 597692 9 FreeHand X 0x010fa358 0x1008000 + 992088 10 FreeHand X 0x010fa170 0x1008000 + 991600 11 FreeHand X 0x010f9830 0x1008000 + 989232 12 FreeHand X 0x01098678 0x1008000 + 591480 13 FreeHand X 0x010f7a5c 0x1008000 + 981596 Thread 1: 0 libSystem.B.dylib 0x90005dec syscall + 12 1 com.apple.OpenTransport 0x9ad015a0 BSD_waitevent + 44 2 com.apple.OpenTransport 0x9ad06360 CarbonSelectThreadFunc + 176 3 libSystem.B.dylib 0x9002b908 _pthread_body + 96 Thread 2: 0 libSystem.B.dylib 0x9002bfc8 semaphore_wait_signal_trap + 8 1 libSystem.B.dylib 0x90030aac pthread_cond_wait + 480 2 com.apple.OpenTransport 0x9ad01e94 CarbonOperationThreadFunc + 80 3 libSystem.B.dylib 0x9002b908 _pthread_body + 96 Thread 3: 0 libSystem.B.dylib 0x9002bfc8 semaphore_wait_signal_trap + 8 1 libSystem.B.dylib 0x90030aac pthread_cond_wait + 480 2 com.apple.OpenTransport 0x9ad11df0 CarbonInetOperThreadFunc + 80 3 libSystem.B.dylib 0x9002b908 _pthread_body + 96 Thread 4: 0 libSystem.B.dylib 0x90053f88 semaphore_timedwait_signal_trap + 8 1 libSystem.B.dylib 0x900707e8 pthread_cond_timedwait_relative_np + 556 2 ...ple.CoreServices.CarbonCore 0x90bf9330 TSWaitOnSemaphoreCommon + 176 3 ...ple.CoreServices.CarbonCore 0x90c012d0 TimerThread + 60 4 libSystem.B.dylib 0x9002b908 _pthread_body + 96 Thread 5: 0 libSystem.B.dylib 0x9001f48c select + 12 1 com.apple.CoreFoundation 0x907f1240 __CFSocketManager + 472 2 libSystem.B.dylib 0x9002b908 _pthread_body + 96 Thread 6: 0 libSystem.B.dylib 0x9002188c access + 12 1 ...e.print.framework.PrintCore 0x9169a620 CreateProxyURL(__CFURL const*) + 192 2 ...e.print.framework.PrintCore 0x9169a4f8 CreateOriginalPrinterProxyURL() + 80 3 ...e.print.framework.PrintCore 0x9169a034 CheckPrinterProxyVersion(OpaquePMPrinter*, __CFURL const*) + 192 4 ...e.print.framework.PrintCore 0x91699d94 PJCPrinterProxyCreateURL + 932 5 ...e.print.framework.PrintCore 0x916997bc PJCLaunchPrinterProxy(OpaquePMPrinter*, PMLaunchPCReason) + 32 6 ...e.print.framework.PrintCore 0x91699730 PJCLaunchPrinterProxyThread(void*) + 136 7 libSystem.B.dylib 0x9002b908 _pthread_body + 96 Thread 0 crashed with PPC Thread State 64: srr0: 0x00000000ffff8a60 srr1: 0x000000000200f030 vrsave: 0x00000000ff000000 cr: 0x24002244 xer: 0x0000000020000002 lr: 0x00000000011d2994 ctr: 0x00000000000003f6 r0: 0x0000000000000000 r1: 0x00000000bfffea60 r2: 0x0000000000000000 r3: 0x00000000083bb000 r4: 0x00000000083c0040 r5: 0x0000000000014d84 r6: 0x0000000000000010 r7: 0x0000000000000020 r8: 0x0000000000000030 r9: 0x0000000000000000 r10: 0x0000000000000060 r11: 0x0000000000000080 r12: 0x0000000007d7e000 r13: 0x0000000000000000 r14: 0x00000000005cbd26 r15: 0x0000000000000001 r16: 0x00000000017b03a0 r17: 0x0000000000000000 r18: 0x000000000068fa80 r19: 0x0000000000000001 r20: 0x0000000006c639c4 r21: 0x00000000006900f8 r22: 0x0000000006e09480 r23: 0x0000000006e0a250 r24: 0x0000000000000002 r25: 0x0000000000000000 r26: 0x00000000bfffed2c r27: 0x0000000006e05ce0 r28: 0x0000000000014d84 r29: 0x0000000000000000 r30: 0x0000000000014d84 r31: 0x00000000083bb000 Binary Images Description: 0x1000 - 0x2fff LaunchCFMApp /System/Library/Frameworks/Carbon.framework/Versions/A/Support/LaunchCFMApp 0x27f000 - 0x2ce3c7 CarbonLibpwpc PEF binary: CarbonLibpwpc 0x2ce3d0 - 0x2e66bd Apple;Carbon;Multimedia PEF binary: Apple;Carbon;Multimedia 0x2e7c00 - 0x2e998b Apple;Carbon;Networking PEF binary: Apple;Carbon;Networking 0x31ab10 - 0x31abb3 CFMPriv_QuickTime PEF binary: CFMPriv_QuickTime 0x31ac20 - 0x31ac97 CFMPriv_System PEF binary: CFMPriv_System 0x31af30 - 0x31b000 CFMPriv_CarbonSound PEF binary: CFMPriv_CarbonSound 0x31b080 - 0x31b153 CFMPriv_CommonPanels PEF binary: CFMPriv_CommonPanels 0x31b230 - 0x31b2eb CFMPriv_Help PEF binary: CFMPriv_Help 0x31b2f0 - 0x31b3ba CFMPriv_HIToolbox PEF binary: CFMPriv_HIToolbox 0x31b440 - 0x31b516 CFMPriv_HTMLRendering PEF binary: CFMPriv_HTMLRendering 0x31b550 - 0x31b602 CFMPriv_CoreFoundation PEF binary: CFMPriv_CoreFoundation 0x31b7f0 - 0x31b8a5 CFMPriv_DVComponentGlue PEF binary: CFMPriv_DVComponentGlue 0x31f760 - 0x31f833 CFMPriv_ImageCapture PEF binary: CFMPriv_ImageCapture 0x31f8c0 - 0x31f9a5 CFMPriv_NavigationServices PEF binary: CFMPriv_NavigationServices 0x31fa20 - 0x31faf6 CFMPriv_OpenScripting?MacBLib PEF binary: CFMPriv_OpenScripting?MacBLib 0x31fbd0 - 0x31fc8e CFMPriv_Print PEF binary: CFMPriv_Print 0x31fcb0 - 0x31fd7d CFMPriv_SecurityHI PEF binary: CFMPriv_SecurityHI 0x31fe00 - 0x31fee2 CFMPriv_SpeechRecognition PEF binary: CFMPriv_SpeechRecognition 0x31ff60 - 0x320033 CFMPriv_CarbonCore PEF binary: CFMPriv_CarbonCore 0x3200b0 - 0x320183 CFMPriv_OSServices PEF binary: CFMPriv_OSServices 0x320260 - 0x320322 CFMPriv_AE PEF binary: CFMPriv_AE 0x320330 - 0x3203f5 CFMPriv_ATS PEF binary: CFMPriv_ATS 0x320470 - 0x320547 CFMPriv_ColorSync PEF binary: CFMPriv_ColorSync 0x3205d0 - 0x3206b3 CFMPriv_FindByContent PEF binary: CFMPriv_FindByContent 0x320730 - 0x32080a CFMPriv_HIServices PEF binary: CFMPriv_HIServices 0x320880 - 0x320960 CFMPriv_LangAnalysis PEF binary: CFMPriv_LangAnalysis 0x3209f0 - 0x320ad6 CFMPriv_LaunchServices PEF binary: CFMPriv_LaunchServices 0x320bb0 - 0x320c87 CFMPriv_PrintCore PEF binary: CFMPriv_PrintCore 0x320c90 - 0x320d52 CFMPriv_QD PEF binary: CFMPriv_QD 0x320e50 - 0x320f39 CFMPriv_SpeechSynthesis PEF binary: CFMPriv_SpeechSynthesis 0x405000 - 0x497f7a PowerPlant Shared Library PEF binary: PowerPlant Shared Library 0x498000 - 0x4f0012 Player PEF binary: Player 0x4f1000 - 0x54a4c0 KodakCMSC PEF binary: KodakCMSC 0x6bd000 - 0x6eca10 <Unknown disk fragment> PEF binary: <Unknown disk fragment> 0x7fc000 - 0x7fdb8b xRes Palette Importc PEF binary: xRes Palette Importc 0x1008000 - 0x17770a5 FreeHand X PEF binary: FreeHand X 0x17770b0 - 0x17a6fe7 MW_MSL.Carbon.Shlb PEF binary: MW_MSL.Carbon.Shlb 0x17fb000 - 0x17fff03 Smudge PEF binary: Smudge 0x5ce6000 - 0x5cecebe PICT Import Export68 PEF binary: PICT Import Export68 0x5ced000 - 0x5d24267 PNG Import Exportr68 PEF binary: PNG Import Exportr68 0x5d25000 - 0x5d30dde Release To Layerswpc PEF binary: Release To Layerswpc 0x5d31000 - 0x5d37fd2 Roughen PEF binary: Roughen 0x5d38000 - 0x5d459ae Shadow PEF binary: Shadow 0x5d46000 - 0x5d4b0de Spiral PEF binary: Spiral 0x5d4c000 - 0x5d57f07 Targa Import Export8 PEF binary: Targa Import Export8 0x5d58000 - 0x5d8d959 TIFF Import Export68 PEF binary: TIFF Import Export68 0x5d93000 - 0x5da0f65 Color Utilities PEF binary: Color Utilities 0x5f62000 - 0x5f6e795 Mirror PEF binary: Mirror 0x5f6f000 - 0x5fbd656 HTML Export PEF binary: HTML Export 0x5fc8000 - 0x5fd442f Graphic Hose PEF binary: Graphic Hose 0x5fd5000 - 0x5fe4b5a BMP Import Exportr68 PEF binary: BMP Import Exportr68 0x5fe5000 - 0x60342d6 PDF Export PEF binary: PDF Export 0x6041000 - 0x6042f44 Fractalizej@ PEF binary: Fractalizej@ 0x6043000 - 0x6075214 Chart Tool™ PEF binary: Chart Tool™ 0x6076000 - 0x607d46d Bend PEF binary: Bend 0x607e000 - 0x60cda7b PDF Import PEF binary: PDF Import 0x60dc000 - 0x60e38f2 Photoshop ImportChartCursor PEF binary: Photoshop ImportChartCursor 0x60e4000 - 0x60eb9b1 3D Rotationp PEF binary: 3D Rotationp 0x60ec000 - 0x611b458 JPEG Import ExportANEL PEF binary: JPEG Import ExportANEL 0x611c000 - 0x613d89f GIF Import Export PEF binary: GIF Import Export 0x613e000 - 0x616d7f7 Flash Export PEF binary: Flash Export 0x616e000 - 0x6175d75 Fisheye Lens PEF binary: Fisheye Lens 0x6176000 - 0x6182343 IPTC File Info PEF binary: IPTC File Info 0x6184000 - 0x6193790 PEF binary: 0x6194000 - 0x61965e5 Photoshop Palette Import PEF binary: Photoshop Palette Import 0x6197000 - 0x619c5a4 Add PointsZ PEF binary: Add PointsZ 0x619d000 - 0x61ad92b Emboss PEF binary: Emboss 0x61ae000 - 0x61be6e1 AppleScript™ Xtrawpc PEF binary: AppleScript™ Xtrawpc 0x61bf000 - 0x61d16de Navigation PEF binary: Navigation 0x61d2000 - 0x61ff94e CorelDRAW 7-8 Import PEF binary: CorelDRAW 7-8 Import 0x620a000 - 0x620d7f1 Trap PEF binary: Trap 0x620e000 - 0x62149d4 Import RGB Color Table PEF binary: Import RGB Color Table 0x6215000 - 0x6217dfe Arc PEF binary: Arc 0x6218000 - 0x62211e3 Delete Empty Text Blocks PEF binary: Delete Empty Text Blocks 0x6222000 - 0x624c8da MIX Services PEF binary: MIX Services 0x7d0b000 - 0x7d37fff com.apple.print.framework.Print.Private 4.6 (163.10) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framework/Versions/Current/Plugins/PrintCocoaUI.bundle/Contents/MacOS/PrintCocoaUI 0x7dbf000 - 0x7ddffff com.apple.print.PrintingCocoaPDEs 4.6 (163.10) /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framework/Versions/A/Plugins/PrintingCocoaPDEs.bundle/Contents/MacOS/PrintingCocoaPDEs 0x7f05000 - 0x7f39fff com.epson.ijprinter.pde.PrintSetting.EP0827MSA 6.36 /Library/Printers/EPSON/InkjetPrinter/PrintingModule/EP0827MSA_Core.plugin/Contents/PDEs/PrintSetting.plugin/Contents/MacOS/PrintSetting 0x7f49000 - 0x8044fff com.epson.ijprinter.IJPFoundation 6.54 /Library/Printers/EPSON/InkjetPrinter/Libraries/IJPFoundation.framework/Versions/A/IJPFoundation 0x809a000 - 0x80cdfff com.epson.ijprinter.pde.ColorManagement.EP0827MSA 6.36 /Library/Printers/EPSON/InkjetPrinter/PrintingModule/EP0827MSA_Core.plugin/Contents/PDEs/ColorManagement.plugin/Contents/MacOS/ColorManagement 0x80dd000 - 0x8110fff com.epson.ijprinter.pde.ExpandMargin.EP0827MSA 6.36 /Library/Printers/EPSON/InkjetPrinter/PrintingModule/EP0827MSA_Core.plugin/Contents/PDEs/ExpandMargin.plugin/Contents/MacOS/ExpandMargin 0x8120000 - 0x8153fff com.epson.ijprinter.pde.ExtensionSetting.EP0827MSA 6.36 /Library/Printers/EPSON/InkjetPrinter/PrintingModule/EP0827MSA_Core.plugin/Contents/PDEs/ExtensionSetting.plugin/Contents/MacOS/ExtensionSetting 0x8163000 - 0x8196fff com.epson.ijprinter.pde.DoubleSidePrint.EP0827MSA 6.36 /Library/Printers/EPSON/InkjetPrinter/PrintingModule/EP0827MSA_Core.plugin/Contents/PDEs/DoubleSidePrint.plugin/Contents/MacOS/DoubleSidePrint 0x81a6000 - 0x81bffff com.apple.print.PrintingTiogaPDEs 4.6 (163.10) /System/Library/Frameworks/Carbon.framework/Frameworks/Print.framework/Versions/A/Plugins/PrintingTiogaPDEs.bundle/Contents/MacOS/PrintingTiogaPDEs 0x838f000 - 0x8397fff com.apple.print.converter.plugin 4.5 (163.8) /System/Library/Printers/CVs/Converter.plugin/Contents/MacOS/Converter 0x78e00000 - 0x78e07fff libLW8Utils.dylib /System/Library/Printers/Libraries/libLW8Utils.dylib 0x79200000 - 0x7923ffff libLW8Converter.dylib /System/Library/Printers/Libraries/libLW8Converter.dylib 0x8fe00000 - 0x8fe52fff dyld 46.16 /usr/lib/dyld 0x90000000 - 0x901bcfff libSystem.B.dylib /usr/lib/libSystem.B.dylib 0x90214000 - 0x90219fff libmathCommon.A.dylib /usr/lib/system/libmathCommon.A.dylib 0x9021b000 - 0x90268fff com.apple.CoreText 1.0.4 (???) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreText.framework/Versions/A/CoreText 0x90293000 - 0x90344fff ATS /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/ATS 0x90373000 - 0x9072efff com.apple.CoreGraphics 1.258.85 (???) /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics 0x907bb000 - 0x90895fff com.apple.CoreFoundation 6.4.11 (368.35) /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation 0x908de000 - 0x908defff com.apple.CoreServices 10.4 (???) /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices 0x908e0000 - 0x909e2fff libicucore.A.dylib /usr/lib/libicucore.A.dylib 0x90a3c000 - 0x90ac0fff libobjc.A.dylib /usr/lib/libobjc.A.dylib 0x90aea000 - 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0x942b9fff com.apple.audio.toolbox.AudioToolbox 1.4.7 /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox 0x9430c000 - 0x9430cfff com.apple.audio.units.AudioUnit 1.4 /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit 0x9430e000 - 0x944cefff com.apple.QuartzCore 1.4.12 /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore 0x94518000 - 0x94555fff libsqlite3.0.dylib /usr/lib/libsqlite3.0.dylib 0x9455d000 - 0x945adfff libGLImage.dylib /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLImage.dylib 0x945b6000 - 0x945cffff com.apple.CoreVideo 1.4.2 /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo 0x9477d000 - 0x9478cfff libCGATS.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCGATS.A.dylib 0x94794000 - 0x947a1fff libCSync.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCSync.A.dylib 0x947a7000 - 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0x9505afff libssl.0.9.7.dylib /usr/lib/libssl.0.9.7.dylib 0x9506a000 - 0x95087fff libresolv.9.dylib /usr/lib/libresolv.9.dylib 0x9acff000 - 0x9ad1dfff com.apple.OpenTransport 2.0 /System/Library/PrivateFrameworks/OpenTransport.framework/OpenTransport 0x9ad98000 - 0x9ad99fff com.apple.iokit.dvcomponentglue 1.7.9 /System/Library/Frameworks/DVComponentGlue.framework/Versions/A/DVComponentGlue 0x9b1db000 - 0x9b1f2fff libCFilter.A.dylib /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCFilter.A.dylib 0x9c69b000 - 0x9c6bdfff libmx.A.dylib /usr/lib/libmx.A.dylib 0xeab00000 - 0xeab25fff libConverter.dylib /System/Library/Printers/Libraries/libConverter.dylib Model: PowerMac3,1, BootROM 4.2.8f1, 1 processors, PowerPC G4 (3.3), 1.3 GHz, 2 GB Graphics: ATI Radeon 7500, ATY,RV200, AGP, 32 MB Memory Module: DIMM0/J21, 512 MB, SDRAM, PC133-333 Memory Module: DIMM1/J22, 512 MB, SDRAM, PC133-333 Memory Module: DIMM2/J23, 512 MB, SDRAM, PC133-333 Memory Module: DIMM3/J24, 512 MB, SDRAM, PC133-333 Modem: Spring, UCJ, V.90, 3.0F, APPLE VERSION 0001, 4/7/1999 Network Service: Built-in Ethernet, Ethernet, en0 PCI Card: SeriTek/1V2E2 v.5.1.3,11/22/05, 23:47:18, ata, SLOT-B PCI Card: pci-bridge, pci, SLOT-C PCI Card: firewire, ieee1394, 2x8 PCI Card: usb, usb, 2x9 PCI Card: usb, usb, 2x9 PCI Card: pcie55,2928, 2x9 PCI Card: ATTO,ExpressPCIPro, scsi, SLOT-D Parallel ATA Device: MATSHITADVD-ROM SR-8585 Parallel ATA Device: IOMEGA ZIP 100 ATAPI USB Device: Hub, Up to 12 Mb/sec, 500 mA USB Device: Hub, Up to 12 Mb/sec, 500 mA USB Device: USB2.0 Hub, Up to 12 Mb/sec, 500 mA USB Device: iMic USB audio system, Griffin Technology, Inc, Up to 12 Mb/sec, 500 mA USB Device: USB Storage Device, Generic, Up to 12 Mb/sec, 500 mA USB Device: USB2.0 MFP, EPSON, Up to 12 Mb/sec, 500 mA USB Device: DYMO LabelWriter Twin Turbo, DYMO, Up to 12 Mb/sec, 500 mA USB Device: USB 2.0 CD + HDD, DMI, Up to 12 Mb/sec, 500 mA USB Device: USB2.0 Hub, Up to 12 Mb/sec, 500 mA USB Device: USB2.0 Hub, Up to 12 Mb/sec, 500 mA USB Device: iMate, USB To ADB Adaptor, Griffin Technology, Inc., Up to 1.5 Mb/sec, 500 mA USB Device: Hub in Apple Pro Keyboard, Alps Electric, Up to 12 Mb/sec, 500 mA USB Device: Griffin PowerMate, Griffin Technology, Inc., Up to 1.5 Mb/sec, 100 mA

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  • Entity Framework 4.0: Optimal and horrible SQL

    - by DigiMortal
    Lately I had Entity Framework 4.0 session where I introduced new features of Entity Framework. During session I found out with audience how Entity Framework 4.0 can generate optimized SQL. After session I also showed guys one horrible example about how awful SQL can be generated by Entity Framework. In this posting I will cover both examples. Optimal SQL Before going to code take a look at following model. There is class called Event and I will use this class in my query. Here is the LINQ To Entities query that uses small anonymous type. var query = from e in _context.Events             select new { Id = e.Id, Title = e.Title }; Debug.WriteLine(((ObjectQuery)query).ToTraceString()); Running this code gives us the following SQL. SELECT      [Extent1].[event_id] AS [event_id],      [Extent1].[title] AS [title]  FROM [dbo].[events] AS [Extent1] This is really small – no additional fields in SELECT clause. Nice, isn’t it? Horrible SQL Ayende Rahien blog shows us darker side of Entiry Framework 4.0 queries. You can find comparison betwenn NHibernate, LINQ To SQL and LINQ To Entities from posting What happens behind the scenes: NHibernate, Linq to SQL, Entity Framework scenario analysis. In this posting I will show you the resulting query and let you think how much better it can be done. Well, it is not something we want to see running in our servers. I hope that EF team improves generated SQL to acceptable level before Visual Studio 2010 is released. There is also morale of this example: you should always check out the queries that O/R-mapper generates. Behind the curtains it may silently generate queries that perform badly and in this case you need to optimize you data querying strategy. Conclusion Entity Framework 4.0 is new product with a lot of new features and it is clear that not everything is 100% super in its first release. But it still great step forward and I hope that on 12.04.2010 we have new promising O/R-mapper available to use in our projects. If you want to read more about Entity Framework 4.0 and Visual Studio 2010 then please feel free to follow this link to list of my Visual Studio 2010 and .NET Framework 4.0 postings.

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  • Pre-filtering and shaping OData feeds using WCF Data Services and the Entity Framework - Part 1

    - by rajbk
    The Open Data Protocol, referred to as OData, is a new data-sharing standard that breaks down silos and fosters an interoperative ecosystem for data consumers (clients) and producers (services) that is far more powerful than currently possible. It enables more applications to make sense of a broader set of data, and helps every data service and client add value to the whole ecosystem. WCF Data Services (previously known as ADO.NET Data Services), then, was the first Microsoft technology to support the Open Data Protocol in Visual Studio 2008 SP1. It provides developers with client libraries for .NET, Silverlight, AJAX, PHP and Java. Microsoft now also supports OData in SQL Server 2008 R2, Windows Azure Storage, Excel 2010 (through PowerPivot), and SharePoint 2010. Many other other applications in the works. * This post walks you through how to create an OData feed, define a shape for the data and pre-filter the data using Visual Studio 2010, WCF Data Services and the Entity Framework. A sample project is attached at the bottom of Part 2 of this post. Pre-filtering and shaping OData feeds using WCF Data Services and the Entity Framework - Part 2 Create the Web Application File –› New –› Project, Select “ASP.NET Empty Web Application” Add the Entity Data Model Right click on the Web Application in the Solution Explorer and select “Add New Item..” Select “ADO.NET Entity Data Model” under "Data”. Name the Model “Northwind” and click “Add”.   In the “Choose Model Contents”, select “Generate Model From Database” and click “Next”   Define a connection to your database containing the Northwind database in the next screen. We are going to expose the Products table through our OData feed. Select “Products” in the “Choose your Database Object” screen.   Click “Finish”. We are done creating our Entity Data Model. Save the Northwind.edmx file created. Add the WCF Data Service Right click on the Web Application in the Solution Explorer and select “Add New Item..” Select “WCF Data Service” from the list and call the service “DataService” (creative, huh?). Click “Add”.   Enable Access to the Data Service Open the DataService.svc.cs class. The class is well commented and instructs us on the next steps. public class DataService : DataService< /* TODO: put your data source class name here */ > { // This method is called only once to initialize service-wide policies. public static void InitializeService(DataServiceConfiguration config) { // TODO: set rules to indicate which entity sets and service operations are visible, updatable, etc. // Examples: // config.SetEntitySetAccessRule("MyEntityset", EntitySetRights.AllRead); // config.SetServiceOperationAccessRule("MyServiceOperation", ServiceOperationRights.All); config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2; } } Replace the comment that starts with “/* TODO:” with “NorthwindEntities” (the entity container name of the Model we created earlier).  WCF Data Services is initially locked down by default, FTW! No data is exposed without you explicitly setting it. You have explicitly specify which Entity sets you wish to expose and what rights are allowed by using the SetEntitySetAccessRule. The SetServiceOperationAccessRule on the other hand sets rules for a specified operation. Let us define an access rule to expose the Products Entity we created earlier. We use the EnititySetRights.AllRead since we want to give read only access. Our modified code is shown below. public class DataService : DataService<NorthwindEntities> { public static void InitializeService(DataServiceConfiguration config) { config.SetEntitySetAccessRule("Products", EntitySetRights.AllRead); config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2; } } We are done setting up our ODataFeed! Compile your project. Right click on DataService.svc and select “View in Browser” to see the OData feed. To view the feed in IE, you must make sure that "Feed Reading View" is turned off. You set this under Tools -› Internet Options -› Content tab.   If you navigate to “Products”, you should see the Products feed. Note also that URIs are case sensitive. ie. Products work but products doesn’t.   Filtering our data OData has a set of system query operations you can use to perform common operations against data exposed by the model. For example, to see only Products in CategoryID 2, we can use the following request: /DataService.svc/Products?$filter=CategoryID eq 2 At the time of this writing, supported operations are $orderby, $top, $skip, $filter, $expand, $format†, $select, $inlinecount. Pre-filtering our data using Query Interceptors The Product feed currently returns all Products. We want to change that so that it contains only Products that have not been discontinued. WCF introduces the concept of interceptors which allows us to inject custom validation/policy logic into the request/response pipeline of a WCF data service. We will use a QueryInterceptor to pre-filter the data so that it returns only Products that are not discontinued. To create a QueryInterceptor, write a method that returns an Expression<Func<T, bool>> and mark it with the QueryInterceptor attribute as shown below. [QueryInterceptor("Products")] public Expression<Func<Product, bool>> OnReadProducts() { return o => o.Discontinued == false; } Viewing the feed after compilation will only show products that have not been discontinued. We also confirm this by looking at the WHERE clause in the SQL generated by the entity framework. SELECT [Extent1].[ProductID] AS [ProductID], ... ... [Extent1].[Discontinued] AS [Discontinued] FROM [dbo].[Products] AS [Extent1] WHERE 0 = [Extent1].[Discontinued] Other examples of Query/Change interceptors can be seen here including an example to filter data based on the identity of the authenticated user. We are done pre-filtering our data. In the next part of this post, we will see how to shape our data. Pre-filtering and shaping OData feeds using WCF Data Services and the Entity Framework - Part 2 Foot Notes * http://msdn.microsoft.com/en-us/data/aa937697.aspx † $format did not work for me. The way to get a Json response is to include the following in the  request header “Accept: application/json, text/javascript, */*” when making the request. This is easily done with most JavaScript libraries.

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  • Learning Zend Framework 1 or 2?

    - by ehijon
    I have programmed for a few years in php and now I'm going to learn zend framwork. Zend is very popular and there are a lot of tutorials, books and documentation out there. But I saw in the last months that there is a second version of Zend, but it's not so used and popular, not yet. I think it is better to start with a new version, but I don't know what to do now, as when I see job offers many people require the first version. Which version do you suggest me?

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  • Role of systems in entity systems architecture

    - by bio595
    I've been reading a lot about entity components and systems and have thought that the idea of an entity just being an ID is quite interesting. However I don't know how this completely works with the components aspect or the systems aspect. A component is just a data object managed by some relevant system. A collision system uses some BoundsComponent together with a spatial data structure to determine if collisions have happened. All good so far, but what if multiple systems need access to the same component? Where should the data live? An input system could modify an entities BoundsComponent, but the physics system(s) need access to the same component as does some rendering system. Also, how are entities constructed? One of the advantages I've read so much about is flexibility in entity construction. Are systems intrinsically tied to a component? If I want to introduce some new component, do I also have to introduce a new system or modify an existing one? Another thing that I've read often is that the 'type' of an entity is inferred by what components it has. If my entity is just an id how can I know that my robot entity needs to be moved or rendered and thus modified by some system? Sorry for the long post (or at least it seems so from my phone screen)!

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  • Actually utilizing relational databases for entity systems

    - by Marc Müller
    Recently I was researching several entity systems and obviously I came across T=Machine's fantastic articles on the subject. In Part 5 of the series the author uses a relational schema to explain how an entity system is built and works. Since reading this, I have been wondering whether or not actually using a compact SQL library would be fast enough for real-time usage in video games. Performance seems to be the main issue with a full blown SQL database for management of all entities and components. However, as mentioned in T=Machine's post, basically all access to data inside the SQLDB is done sequentlially by each system over each component. Additionally, using a library like SQLite, one could easily improve performance by storing the entity data exclusively in RAM to increase access speeds. Disregarding possible performance issues, using a SQL database, in my opinion, would allow for a very intuitive implementation of entity systems and bring a long certain other benefits like easy de/serialization of game states and consistency checks like the uniqueness of entity IDs. Edit for clarification: The main question was whether using a SQL database for the actual entity management (not just storing the game state on the disk) in a real-time game would still yield a framerate appropriate for a game or even if someone is aware of projects that demonstrate SQL in a video game.

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