LEARNING NHIBERNATE 4 BY SUHAS
CHATEKAR
LEARNING NHIBERNATE 4 BY SUHAS CHATEKAR PDF
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About the Author
Suhas Chatekar
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LEARNING NHIBERNATE 4 BY SUHAS CHATEKAR PDF
Explore the full potential of NHibernate to build robust data access code
About This Book
Build a robust and scalable data access layer using NHibernate's features and practical wisdom
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Use patterns such as specification and query object to make data access layer maintainable and extensible
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Work effectively with legacy databases using lesser known NHibernate features
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Who This Book Is For
This book targets .NET developers who have never used an ORM before, developers who have used an ORM before but are new to NHibernate, or have used NHibernate sparingly and want to learn more about NHibernate.
What You Will Learn
Map domain entities to a database schema using the different mapping mechanisms available
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Configure NHibernate through XML configuration
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Save, update, and delete entities in the database and query data from a database using different querying
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methods
Optimize database operations for speed and memory consumption
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Use NHibernate in real-life software projects
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Get to know about data access patterns such as repository, specification, and query object
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Use NHibernate with legacy databases
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In Detail
Connecting the object-oriented world of .NET to the relational world of databases has always been fiddly but with the onset of ORMs such as NHibernate, developers have finally got some relief in this area.
You will begin with a bird's eye view of NHibernate, touching upon its core concepts. You will define domain model and map it with database schema using different techniques. You will then look into multiple ways of storing domain entities in a database and learn important concepts such as transitive persistence, transactions and unit of work. This will be followed by retrieving data from database. Next, you will optimize your code, explore concepts such as the onion architecture, and learn where NHibernate fits best in an application's architecture. After introducing a well-known repository pattern into our application, you will learn to deal with legacy databases. We will conclude with infrequently used features such as stateless sessions, the second level cache, concurrency, and so on, which might come handy.
Suhas Chatekar
Suhas Chatekar has been in the business of building software for 12 years. He has mainly worked on .NET but possesses the skills of a full-stack developer. He started his career as a software developer, working on a trading platform. Since then, he has worked in several different domains, building both desktop and web-based applications. He is very passionate about coding and learning. He believes that practices such as test-driven development, automated testing, continuous deployment, and Agile are at the heart of quality software development. He currently works as a technical architect and mentor for a London-based company, working in the fields of loyalty, assistance, and insurance. He has used NHibernate in various commercial projects, including both greenfield and brownfield. He also has experience in using NHibernate along with other ORMs and data retrieval techniques in large code bases. He is especially fond of clean code and following the right architectural guidelines. Through years of experience of working with NHibernate, he believes he has acquired some knowledge about best architectural principles that help in building resilient data access code using NHibernate, which he can share with readers. In his spare time, he explores new technologies and writes a blog. He lives in London with his wife, Snehal, and daughter, Ovee. You can reach out to Suhas on Twitter using his handle at suhas_chatekar.
Most helpful customer reviews
3 of 3 people found the following review helpful. Definitely the book NHibernate was lacking By Samir Aguiar
I have just finished this book and I'm glad I bought it. This is the NHibernate book I was looking for.
I decided to learn more about NH because I'm using it at my current job and I was tired of asking for help when something complex was needed. But although I was not a beginner, I was not an expert either so the official documentation never helped me much. This book though is an in-depth tutorial, a guide, that you can easily follow along from the beginning to the very end while understanding every piece of it.
Chatekar's writing is clear and straightforward. It's detailed enough to give you an understanding of the topic and summarized enough so you don't get tired. The first half of the book is more about teaching you the basics: there's a simple problem and the author slowly builds a solution that uses NHibernate. The examples are easy to follow and the chapters are divided so that NHibernate configuration, entities mapping and database querying/writing are all covered separately. The second half of the book advances into more complex topics such as project organization (software architecture), NHibernate usage on web projects, design patterns, dependency injection, performance (caching, lazy loading, future queries) and so on. Also, along the road the author gives a handful of valuable advice about best practices and common pitfalls/caveats so that in the end you are not just a person with a new complex skill and no idea of where to begin to apply it.
explanation of entities mappings.
In the first half, the author goes into implementing a solution to the problem proposed. If you try to follow along, you won't be able to either compile or run the code as there are a lot of tweaks required. I've only managed to run it after changing NHibernate's configuration and checking the book source (which also didn't compile). The book webpage could at least contain some errata or guidance for that (I did submit some to Packt but it never got published).
Secondly, I still think that there could have been more discussion about mappings and relationships, which are the heart of NHibernate and the source of many Stack Overflow questions. Again, the documentation is not very helpful here. For instance, the author made all relationships bidirectional and never got much into unidirectional relationships. Why one-to-one relationships cannot be unidirectional? What about mapping an FK Id into its own property to avoid loading an associated entity and mimic ISession.Load() behavior? What about nested relationships with relationships between children? Those are a few questions that remained after reading (and which of course I'll be exploring myself) but could have been clarified in the first chapters.
Anyway, despite the above critics the book is definitely worth it and will help anyone to overcome the initial learning curve of NHibernate. It's not meant to cover all the features but rather just kick start the reader --which it has successfully accomplished.
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About the Author
Suhas Chatekar
Suhas Chatekar has been in the business of building software for 12 years. He has mainly worked on .NET but possesses the skills of a full-stack developer. He started his career as a software developer, working on a trading platform. Since then, he has worked in several different domains, building both desktop and web-based applications. He is very passionate about coding and learning. He believes that practices such as test-driven development, automated testing, continuous deployment, and Agile are at the heart of quality software development. He currently works as a technical architect and mentor for a London-based company, working in the fields of loyalty, assistance, and insurance. He has used NHibernate in various commercial projects, including both greenfield and brownfield. He also has experience in using NHibernate along with other ORMs and data retrieval techniques in large code bases. He is especially fond of clean code and following the right architectural guidelines. Through years of experience of working with NHibernate, he believes he has acquired some knowledge about best architectural principles that help in building resilient data access code using NHibernate, which he can share with readers. In his spare time, he explores new technologies and writes a blog. He lives in London with his wife, Snehal, and daughter, Ovee. You can reach out to Suhas on Twitter using his handle at suhas_chatekar.
