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Forms authentication stores users in the web.config file by default, but, as you will see in the section Custom Credentials Store, you can store the information anywhere you like. You just need to create the code that accesses the data store and retrieves the required information. (And if you use the membership API introduced in 21, you even don t need to do that.) A common example is to store the user information in a custom database. This flexibility in the storage of user information also means you can control how user accounts are created and administered, and you can attach additional information to user accounts. By comparison, Windows authentication (discussed in 22) is much less flexible. It requires that you set up a Windows user account for each user you want to authenticate. This is obviously a problem if you want to serve a large number of users or if you want to register users programmatically. It also doesn t allow you to store additional information about users. (In the case of Active Directory, you have the possibility of extending the schema, but this is something that needs to be planned well.) Instead, you have to store this information separately. Passport authentication has similar limitations. Although Passport stores more user information, it doesn t allow you to add custom information, and it doesn t allow you to take part in user registration or account management.

Figure 21-9. Populating the Customers table You will use your final table, Orders, to represent the automobile a given customer is interested in purchasing. Do this by mapping OrderID values to CarID/CustID values. Figure 21-10 shows the structure of your final table (again, note that OrderID is the primary key).

Within the Spring bean definition template you can write many different bean definitions. Each bean must have a unique id and must use the Spring beans XML namespaces. Spring will manage the entire life cycle of all beans, instantiating all of them before they are used. Spring uses the singleton scope by default. <bean id="message" class="com.apress.flexjava.hellofilippo.Message" > </bean> The XML above will inject a bean of type Message with id= message . Spring supports both constructor and dependency injection.

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So far, you ve considered the reasons that make forms authentication an attractive choice for user authentication. However, forms authentication also has downsides:

Figure 21-10. Designing the Orders table Now add data to your Orders table. Assuming that the OrderID value begins at 1000, select a unique CarID for each CustID value (see Figure 21-11).

You have to create the user interface for users to log in. You have to maintain a catalog with user credentials. You have to take additional precautions against the interception of network traffic. The following sections explore these issues. You can solve the first two of these downsides by using the membership API framework, which offers prebuilt controls and a prebuilt schema for credential storage and runs on SQL Server databases out of the box. You will learn about the membership API framework in 21.

Figure 21-11. Populating the Orders table For example, the entries used in this text indicate that Dave Brenner (CustID = 1) is interested in the black BMW (CarID = 1000), while Pat Walton (CustID = 4) has her eye on the pink Saab (CarID = 1992).

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