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You are an executive </ContentTemplate> </asp:RoleGroup> <asp:RoleGroup Roles="Employee, Employee (Read Only)"> <ContentTemplate> You are an employee </ContentTemplate> </asp:RoleGroup> </RoleGroups> <LoggedInTemplate> You are logged in, but you are not an employee or an executive. </LoggedInTemplate> <AnonymousTemplate> You are not logged in. Please login using the form below:<br /><br /> <asp:Login ID="Login1" Runat="server"/> </AnonymousTemplate> </asp:LoginView> Here s a rundown of how the LoginView processes all these RoleGroups and templates. First, it determines whether or not the current user is logged in. If the user is not logged in, LoginView displays the content from the AnonymousTemplate. In the preceding Listing 5-15, the AnonymousTemplate displays a Login control so the user can log in. If the user is authenticated, the LoginView begins looking at each RoleGroup to see if any of the roles defined in the Roles parameter of the RoleGroup match any of the roles that the user is in. In Listing 5-15, the LoginView first checks to see if the user is in the Executive role. If so, the LoginView displays the content from the ContentTemplate associated with the RoleGroup. In this case, it displays You are an executive. If the user is not an Executive, then the LoginView jumps to the next RoleGroup and starts the process over again. In this example, it checks to see if the user is in the Employee role or the Employee (Read Only) role, and displays You are an employee if so.

Let s play Wolf 3D in the emulator. Make sure to do this sanity check first: the native library is critical and must be placed in the libs/armeabi folder of the main project (as shown in Figure 6-8). At runtime, the library will be loaded and cached to the right location in the device.

Listing 6-3. WindowAppenderDemo.java package com.apress.logging.log4j.appender; import org.apache.log4j.Logger; public class WindowAppenderDemo { private static Logger logger1 = Logger.getLogger("Logger1"); private static Logger logger2 = Logger.getLogger("Logger2"); /** Creates a new instance of WindowAppenderDemo */ public WindowAppenderDemo() { } public void doLogging() { logger1.info("Message from logger1"); logger2.info("Message from logger2"); } /** * @param args the command line arguments */ public static void main(String[] args) { WindowAppenderDemo demo = new WindowAppenderDemo(); demo.doLogging(); AnotherClass anc = new AnotherClass(); anc.logAnotherMessage(); } } When executing the program in Listing 6-3, we will see a small logging window with logging messages displayed in it, as shown in Figure 6-1.

Note When you specify a list of roles, the content associated with those roles is displayed if the user is a

File locations, directories, server names, and IP addresses should normally be configuration settings Also, look for numbers in your application that have an effect on the user interface (UI) One example is the number assigned to the PageSize property of GridView objects in your application The PageSize property determines how many items are displayed on each page of a GridView, and users have a tendency to think that they are seeing too few or too many items at a time Making properties such as this configurable will save you the hassle of recompiling the application every time someone thinks they should be changed Always ask yourself how often a setting is going to change Application settings are usually items that will change over the course of months or years, not days or hours.

Tip If the library is not placed properly, the Java system call System.loadLibrary() will fail with an

If you have an item that will be changing constantly, think about storing it in a database instead of the <appSettings> section Making changes to your Webconfig file may have some undesirable effects on the web application We will discuss these adverse effects and how to store configuration settings in a database later in this chapter Avoid placing settings in the <appSettings> section that could be placed in a cascading style sheet For example, if you want the font, font-size, and colors in your web application to be configurable, your time will be much better spent setting up a style sheet than making a bunch of application settings Redirection URLs to sites or documents outside your web application can usually be made into application settings However, URLs to web forms in your web application more than likely do not need to be application settings.

We will write a small configuration file, customappender.properties, to configure both of the Logger objects used in the example classes in Listings 6-2 and 6-3. This file, shown in Listing 6-4, exhibits the configuration to use for this example. Listing 6-4. customappender.properties #configuring the custom logger log4j.logger.Logger1=DEBUG,WINDOW log4j.logger.Logger2=DEBUG,WINDOW #configuring the WINDOW appender log4j.appender.WINDOW=com.apress.logging.log4j.appender.WindowAppender log4j.appender.WINDOW.layout=org.apache.log4j.SimpleLayout log4j.appender.WINDOW.title=Custom Logging Window log4j.appender.WINDOW.width=200 log4j.appender.WINDOW.height=200 In this configuration file, we pass the values for title, width, and height for WindowAppender. We also specify SimpleLayout as the layout to be used by WindowAppender.