Book Image

NHibernate 2 Beginner's Guide

By : Aaron Cure
Book Image

NHibernate 2 Beginner's Guide

By: Aaron Cure

Overview of this book

<p>NHibernate is an open source object-relational mapper, or simply put, a way to retrieve data from your database into standard .NET objects. Quite often we spend hours designing the database, only to go back and re-design a mechanism to access that data and then optimize that mechanism. This book will save you time on your project, providing all the information along with concrete examples about the use and optimization of NHibernate.<br /><br />This book is an approachable, detailed introduction to the NHibernate object-relational mapper and how to integrate it with your .NET projects. If you're tired of writing stored procedures or maintaining inline SQL, this is the book for you.<br /><br />Connecting to a database to retrieve data is a major part of nearly every project, from websites to desktop applications to distributed applications. Using the techniques presented in this book, you can access data in your own database with little or no code.<br /><br />This book covers the use of NHibernate from a first glance at retrieving data and developing access layers to more advanced topics such as optimization and Security and Membership providers. It will show you how to connect to multiple databases and speed up your web applications using strong caching tools. We also discuss the use of third-party tools for code generation and other tricks to make your development smoother, quicker, and more effective.</p>
Table of Contents (19 chapters)
NHibernate 2
Credits
About the Author
About the Reviewers
Preface
Index

Getting started


log4net has three major objects that we need to be concerned with—the LogManager, loggers, and appenders. Imagine that log4net is a big bucket into which we throw all of the items we want to log on little scraps of paper. Instead of writing all of these pieces of paper by hand, we use an object called a logger. Loggers are used to classify and organize information as it is added to the bucket.

Once we have our information in the bucket, we need to get it out somehow, so we use an appender. Appenders take information from the bucket and "write" it out somewhere, depending on our configuration.

Multiple appenders can process the same log event and handle it in their own way. A couple of good examples of this are a Rolling File appender and an e-mail appender. If, for example, a high priority event is logged (such as a critical application error), then we may not only want to log it to a file, but also e-mail it to an administrator. We can configure appenders for each of these...