Comments on: Using NHibernate In Your Service Layer http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/ Trying to walk that thin line between intelligence and ignorance Wed, 08 Sep 2010 21:03:45 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Davy Brion http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-55304 Davy Brion Sun, 22 Aug 2010 10:56:00 +0000 http://davybrion.com/blog/?p=2036#comment-55304 yup :) or you could use a session per batch of requests if you want yup :)

or you could use a session per batch of requests if you want

]]> By: Morten Jacobsen http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-55303 Morten Jacobsen Sun, 22 Aug 2010 10:55:18 +0000 http://davybrion.com/blog/?p=2036#comment-55303 Yeah that makes sense... Would this be sort-of a session-per-request scenario then? Yeah that makes sense… Would this be sort-of a session-per-request scenario then?

]]> By: Davy Brion http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-55299 Davy Brion Sun, 22 Aug 2010 10:33:31 +0000 http://davybrion.com/blog/?p=2036#comment-55299 @Morten I've never used the session-per-presenter strategy, nor would i recommend it actually. What i would do in your scenario, would be to use an in-process Agatha service layer. It wouldn't use WCF, it would run completely in process, but you would have a completely separated service layer from your presentation layer and you could reuse all of the NHibernate related tricks that you find on this blog ;) @Morten

I’ve never used the session-per-presenter strategy, nor would i recommend it actually.

What i would do in your scenario, would be to use an in-process Agatha service layer. It wouldn’t use WCF, it would run completely in process, but you would have a completely separated service layer from your presentation layer and you could reuse all of the NHibernate related tricks that you find on this blog ;)

]]> By: Morten Jacobsen http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-55220 Morten Jacobsen Sat, 21 Aug 2010 16:32:56 +0000 http://davybrion.com/blog/?p=2036#comment-55220 Davy, As always, excellent stuff.. I am trying to apply your ideas to my current project, but I have hit a problem on the way... The thing is I'm doing a WinForms application, with a session-per-presenter strategy (in this case, it means one per form).. Now my repositories etc. need to access the session from the currently active form, but I am not sure how to loosely obtain a reference to the currently active form's session.. Any ideas? From your blog it seems you mostly deal with WCF/WPF/silverlight and asp.net, I understand that this is perhaps a little outside your area, but maybe you could sketch a way you would do it, where you tasked with creating such an application.. Davy,

As always, excellent stuff.. I am trying to apply your ideas to my current project, but I have hit a problem on the way… The thing is I’m doing a WinForms application, with a session-per-presenter strategy (in this case, it means one per form).. Now my repositories etc. need to access the session from the currently active form, but I am not sure how to loosely obtain a reference to the currently active form’s session..

Any ideas?

From your blog it seems you mostly deal with WCF/WPF/silverlight and asp.net, I understand that this is perhaps a little outside your area, but maybe you could sketch a way you would do it, where you tasked with creating such an application..

]]> By: Dilip Singh http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-40920 Dilip Singh Wed, 02 Jun 2010 06:18:20 +0000 http://davybrion.com/blog/?p=2036#comment-40920 Thank you for sucha great post . If possible if you can attach a sample working solution with your post . I have also read "Why You Shouldn’t Expose Your Entities Through Your Services". Great information and really out of the box thinking . Thank you for sucha great post . If possible if you can attach a sample working solution with your post . I have also read “Why You Shouldn’t Expose Your Entities Through Your Services”. Great information and really out of the box thinking .

]]> By: Lee http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-37717 Lee Thu, 29 Apr 2010 12:03:39 +0000 http://davybrion.com/blog/?p=2036#comment-37717 Thanks for the post! Just want to mention that NHibernate is good but it has some drawbacks as well. For example it cannot handle ASP.NET web gardens. So it is better to use a distributed caching product as a 2nd level cache. There are some third party caches providers like <a href="http://www.alachisoft.com/ncache/nhibernate_index.html" rel="nofollow">NCache</a>, which is a mature and well known distribute in-memory caching solution, offer appliance for NHibernate 2nd level caching without any code change. Thanks for the post! Just want to mention that NHibernate is good but it has some drawbacks as well. For example it cannot handle ASP.NET web gardens. So it is better to use a distributed caching product as a 2nd level cache. There are some third party caches providers like NCache, which is a mature and well known distribute in-memory caching solution, offer appliance for NHibernate 2nd level caching without any code change.

]]> By: Davy Brion http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-35319 Davy Brion Mon, 05 Apr 2010 16:37:18 +0000 http://davybrion.com/blog/?p=2036#comment-35319 @Afif i've tried to answer your question in <a href="http://davybrion.com/blog/2010/04/clients-shouldnt-define-your-services/" rel="nofollow">this post</a>... i hope it helps :) @Afif

i’ve tried to answer your question in this post… i hope it helps :)

]]> By: Clients Shouldn’t Define Your Services | The Inquisitive Coder – Davy Brion's Blog http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-35317 Clients Shouldn’t Define Your Services | The Inquisitive Coder – Davy Brion's Blog Mon, 05 Apr 2010 16:35:59 +0000 http://davybrion.com/blog/?p=2036#comment-35317 [...] Comments Afif on Using NHibernate In Your Service LayerDavid Boike on MSDTC Woes With NServiceBus And NHibernateForcibly creating a distributed .NET [...] [...] Comments Afif on Using NHibernate In Your Service LayerDavid Boike on MSDTC Woes With NServiceBus And NHibernateForcibly creating a distributed .NET [...]

]]> By: Afif http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-35269 Afif Mon, 05 Apr 2010 11:06:17 +0000 http://davybrion.com/blog/?p=2036#comment-35269 Davy, I am not sure if there's a short or long answer to this. But any pointers would be really appreciated. My architecture at works requires a web app and a windows app to talk to the application server via WCF. The Application server being where all the Data access and Service libraries live. I intend to implement N-hibernate into the project. But wanted to get some pointers if your approach above is recommended for Web and Windows clients alike when sending and receiving data via WCF? Great article by the way., your style of blogging is really clear and concise. Helps a great deal in understanding and working towards a better development repertoire. Thanks! :-) Davy, I am not sure if there’s a short or long answer to this. But any pointers would be really appreciated. My architecture at works requires a web app and a windows app to talk to the application server via WCF. The Application server being where all the Data access and Service libraries live. I intend to implement N-hibernate into the project. But wanted to get some pointers if your approach above is recommended for Web and Windows clients alike when sending and receiving data via WCF? Great article by the way., your style of blogging is really clear and concise. Helps a great deal in understanding and working towards a better development repertoire.
Thanks! :-)

]]> By: kurt schroeder http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-31533 kurt schroeder Thu, 11 Mar 2010 13:59:12 +0000 http://davybrion.com/blog/?p=2036#comment-31533 Consider it done! i'll give you my cell off line just send me an Email! Consider it done! i’ll give you my cell off line just send me an Email!

]]> By: Davy Brion http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-31492 Davy Brion Thu, 11 Mar 2010 06:13:45 +0000 http://davybrion.com/blog/?p=2036#comment-31492 i'll have the tall cappuccino :) i’ll have the tall cappuccino :)

]]> By: kurt schroeder http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-31461 kurt schroeder Wed, 10 Mar 2010 22:16:20 +0000 http://davybrion.com/blog/?p=2036#comment-31461 I really want to thank you again for this article. This have made a huge difference just by walking the code of this and the other articles. again, much appreciated. If/when you get to chicago i at least owe a coffee. KES I really want to thank you again for this article. This have made a huge difference just by walking the code of this and the other articles.
again, much appreciated. If/when you get to chicago i at least owe a coffee.
KES

]]> By: Davy Brion http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-25124 Davy Brion Sat, 16 Jan 2010 15:06:46 +0000 http://davybrion.com/blog/?p=2036#comment-25124 @Chuck keep in mind that you're not obligated to use Setter injection with this... if you add the IUnitOfWork as a constructor dependency, it will work as well. Though you'd have to put it in the constructor of each derived class as well. @Chuck

keep in mind that you’re not obligated to use Setter injection with this… if you add the IUnitOfWork as a constructor dependency, it will work as well. Though you’d have to put it in the constructor of each derived class as well.

]]> By: Chuck http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-25084 Chuck Fri, 15 Jan 2010 23:40:54 +0000 http://davybrion.com/blog/?p=2036#comment-25084 Never mind...I had not tested my Session Provider (I added a string to the constructor, which was not being provided). This caused that object to not create and that apparently bubbled up. Once I removed the string and retested, the Setter Injection works. Eyes going squirrley...need pizza and beer. Cheers C Never mind…I had not tested my Session Provider (I added a string to the constructor, which was not being provided). This caused that object to not create and that apparently bubbled up. Once I removed the string and retested, the Setter Injection works.

Eyes going squirrley…need pizza and beer.

Cheers
C

]]> By: Chuck http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-25083 Chuck Fri, 15 Jan 2010 23:06:13 +0000 http://davybrion.com/blog/?p=2036#comment-25083 I should have known the Angle Brackets wouldn't post. I think I remember Steve Boehlen having the same issue earlier :) I should have known the Angle Brackets wouldn’t post. I think I remember Steve Boehlen having the same issue earlier :)

]]> By: Chuck http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-25082 Chuck Fri, 15 Jan 2010 23:05:00 +0000 http://davybrion.com/blog/?p=2036#comment-25082 Davy - I am really, really learning how far I still have to go when I codewalk your material. I took the day off just to spend with Agatha. I do have one question regarding using Setter Injection on the UoW variable. How do I configure that? I have already created a boot strap class that inherits from container, and I register it with: Register(Lifestyle.Transient). However, when I get to the part of Handler, it is always null. Would it have anything to do with RequestState? I am using the WcfRequestState implementation. Cheers! C Davy – I am really, really learning how far I still have to go when I codewalk your material. I took the day off just to spend with Agatha. I do have one question regarding using Setter Injection on the UoW variable.

How do I configure that?

I have already created a boot strap class that inherits from container, and I register it with:

Register(Lifestyle.Transient).

However, when I get to the part of Handler, it is always null. Would it have anything to do with RequestState? I am using the WcfRequestState implementation.

Cheers!

C

]]> By: Davy Brion http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-24773 Davy Brion Wed, 13 Jan 2010 08:11:34 +0000 http://davybrion.com/blog/?p=2036#comment-24773 @Asger i only want my Repositories to access the ISession directly... the UnitOfWork provides an abstraction that is typically easier to muck/stub during tests @Asger

i only want my Repositories to access the ISession directly… the UnitOfWork provides an abstraction that is typically easier to muck/stub during tests

]]> By: Asger Hallas http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-24772 Asger Hallas Wed, 13 Jan 2010 08:09:15 +0000 http://davybrion.com/blog/?p=2036#comment-24772 I'm not quite sure, why you have the UnitOfWork class? It's seems that all it does is managing the session - which could just as well be done by the SessionManager. It's seems simpler. Why do you introduce the UoW instead of just using the session directly? I’m not quite sure, why you have the UnitOfWork class? It’s seems that all it does is managing the session – which could just as well be done by the SessionManager. It’s seems simpler. Why do you introduce the UoW instead of just using the session directly?

]]> By: » Must read and references Blog of developer Mikkel Ovesen http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-24237 » Must read and references Blog of developer Mikkel Ovesen Fri, 08 Jan 2010 13:58:20 +0000 http://davybrion.com/blog/?p=2036#comment-24237 [...] Read: http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/ [...] [...] Read: http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/ [...]

]]> By: Reflective Perspective - Chris Alcock » The Morning Brew #497 http://davybrion.com/blog/2009/12/using-nhibernate-in-your-service-layer/comment-page-1/#comment-23202 Reflective Perspective - Chris Alcock » The Morning Brew #497 Mon, 14 Dec 2009 09:40:46 +0000 http://davybrion.com/blog/?p=2036#comment-23202 [...] Using NHibernate In Your Service Layer - Davy Brion revisits the management of NHibernate Sessions in Service Layer projects with implementations of ISessionProvider, IActiveSessionManager and IUnitOfWork interfaces, along with the code to wire this solution into your application [...] [...] Using NHibernate In Your Service Layer – Davy Brion revisits the management of NHibernate Sessions in Service Layer projects with implementations of ISessionProvider, IActiveSessionManager and IUnitOfWork interfaces, along with the code to wire this solution into your application [...]

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