And in certain situations use of the stack can be eliminated anyway inline functions or aggressive optimization for function calls, use of registers for local variables instead of stack space.
Anyway, to your question If you have enough stack space and the recursion won't be deep enough to blow your stack, recursion is often the right choice. Not always, but often. But you have to understand your architecture, your platform, your toolset, etc. Other simple embedded systems only use a single stack, or maybe one "background" stack and one interrupt stack. If you're coming from a Java background, I'm not surprised if this kind of discussion is new to you.
When should one avoid using NHibernate's lazy-loading feature? Asked 3 Months ago Answers: 5 Viewed 23 times. There are clear performance tradeoffs between eager and lazy loading objects from a database. When the SomeType class implements IDisposable.
CreateCriteria typeof Employee. Add Restrictions. Eq "Department", department. Kaiser Advisor. Connect and share knowledge within a single location that is structured and easy to search. All I understand about lazy loading is that it loads only when the object is needed and we should use it.
Please explain me which scenarios we have to use and not use it? Thanks in advance. Lazy loading is the essence of ORM. It is the principle of ORM. I would hardly explain it better than that post by Ayende. But I have to confirm - I see it the same way. I never used NON lazy setting. If something should be loaded in one shot - use projections:. To answer your question shortly: I would recommend you to use lazy loading, but you have to design your application with lazy loading in mind.
A more thorough answer: Lazy loading is the default in NHibernate. So if you are not doing anything to circumvent it, you are going to use lazy loading.
With lazy loading you can use nested objects with many relationships to other tables and it is going to work fine. They are loaded from the database as needed. These problems can be circumvented if you declare which object should be eagerly fetched - or with some smarter queries - but you have to keep this in mind. I do however agree on advice of not overusing this feature. Just deciding what should go where would be hard enough, then you have the complexity of multiple fetch groups in a single entity, the possibility of loading an entity goes from a select or to to M selects, where M is the number of fetch groups.
Can I use the property setter as a way to know when the lazy property is fetched? Can I assume it will only happen once except when I set the property myself? No, you can't.
To be rather more exact, you won't know when NH is doing it and when some other code is. This is very useful for binary data. However, I'm wondering if there is a way that NHibernate can stream the data? Using something like SqlDataReader for sequential access to varbinaries, rather than pulling all the data at once? No, if you want a stream, you need to do provide a Stream property and a IUserType implementation.
I can only think of this as a way to prevent some blobs and clobs fetched when we don't need them. But doesn't it lead to the point that we should separate blob and clobs in our storage as keeping them in separate tables? Keeping the Post. Image together as an business entity would make sense due to consistency with customer's language, However in database, it wouldn't be that necessare to keep image in the Posts table.
So if any of the properties in the component is accessed all properties in the component is loaded? I had a dream to start my own business, nevertheless I did not have enough amount of cash to do this. Thank heaven my friend recommended to use the loan.
Hence I used the college loan and made real my old dream. I filed it under Bug, but it might actually be a New Feature depending on if it should be possible. Wouldnt IQuery. Enumerable combined with Session. Evict let you do something like this. The manual When Flush is subsequently called, the state of that object will be synchronized with the database. If you do not want this synchronization to occur or if you are processing a huge number of objects and need to manage memory efficiently, the Evict method may be used to remove the object and its collections from the cache.
That isn't what Enumerable does, Enumerable is useful if you expect most of your results to reside in the 2nd level cache. If i query an object an Castle. MyObjectProxy is returned, and it is not possible to call any methods on the MyObject object.
Markdown turns plain text formatting into fancy HTML formatting. Get in touch with me: oren ravendb. Let us go back to my usual blog example, and take a look at the Post entity: As you can see, it is pretty simple example, but we have a problem.
CreateQuery "from Post". SetMaxResults 1. WriteLine post. CreateQuery "from Post fetch all properties". Very useful yet a simple concept to understand. Thats a good mix. Tobias, There isn't a way to specify this for criteria API right now. Frans, I am not sure that I am following you.
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