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Now that the new security cache provider has been developed and configured, you can use it from a web page. Since the demo application already has a reference to the assembly, you can skip that step. Add a new web form to the demo application called CustomSecurityCache and make it the startup page. Add the following using statements: using Microsoft.Practices.EnterpriseLibrary.Security; using Microsoft.Practices.EnterpriseLibrary.Security.Cache.CachingStore; using SecurityDemoLibrary; On the form, place a label named m_ResultLabel, a button named m_SaveSecurityCache, and a button named m_RetrieveSecurityCache. Add the code shown in Listing 11-13 to the click event of the m_SaveSecurityCache button. Listing 11-13. Adding the m_SaveSecurityCache Event protected void m_SaveSecurityCache_Click(object sender, EventArgs e) { // Get an instance of the custom security cache provider DemoSecurityCacheProvider provider = SecurityCacheFactory.GetSecurityCacheProvider( "Custom Cache Provider") as DemoSecurityCacheProvider; // Create a new SecurityCacheItem and set its Identity property

/** * Pause the game. */ public void pauseApp() { if(myGameThread != null) { myGameThread.pause(); } } /* * End the game. */ public void quit() { try { destroyApp(false); notifyDestroyed(); } catch(Exception e) { } } /* * restart after a pause. */ public void resumeGame() { myGameThread.resumeGame(); } //---------------------------------------------------------------// implementation of CommandListener /* * Respond to a command issued on an error alert. */ public void commandAction(Command c, Displayable s) { if(c == Alert.DISMISS_COMMAND) { // if there was a serious enough error to // cause an alert, then we end the game // when the user is done reading the alert: // (Alert.DISMISS_COMMAND is the default // command that is placed on an Alert // whose timeout is FOREVER) quit(); } }

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Constructing JohnNXT takes quite a long time and more than a thousand LEGO elements. As stated at the beginning of this chapter, you need more than two NXT sets parts, because many of them are not included in the standard set just to name a few, the neck pistons, the tread links, and the arms chain links. The complete bill of materials is shown in Figure 8-10, and the textual list in Table 8-6.

SecurityCacheItem item = new SecurityCacheItem(); item.Identity = User.Identity; // Save the SecurityCacheItem to cache and // place the returned token in session IToken token = provider.SaveSecurityCacheItem(item); Session["CustomToken"] = token; m_ResultLabel.Text = "SecurityCacheItem Saved"; } Insert the code shown in Listing 11-14 into the m_RetrieveSecurityCache button to retrieve the SecurityCacheItem from the caching store. Listing 11-14. Adding the m_RetrieveSecurityCache Event protected void m_RetrieveSecurityCache_Click(object sender, EventArgs e) { // Get an instance of the custom security cache provider DemoSecurityCacheProvider provider = SecurityCacheFactory.GetSecurityCacheProvider( "Custom Cache Provider") as DemoSecurityCacheProvider; // Retrieve the SecurityCacheItem denoted by the token saved in session SecurityCacheItem item = provider.GetSecurityCacheItem( (IToken)Session["CustomToken"]); m_ResultLabel.Text = item.Identity.Name; } Compile and execute the application. When the page appears, click the save button. You will see a message indicating that the save was completed. Next, click the retrieve button, and the currently logged-in user s name will be displayed.

CHAPTER 8 JOHNNXT IS ALIVE!

//------------------------------------------------------// error methods /** * Converts an exception to a message and displays * the message. */ void errorMsg(Exception e) { e.printStackTrace(); if(e.getMessage() == null) { errorMsg(e.getClass().getName()); } else { errorMsg(e.getClass().getName() + ":" + e.getMessage()); } } /** * Displays an error message alert if something goes wrong. */ void errorMsg(String msg) { Alert errorAlert = new Alert("error", msg, null, AlertType.ERROR); errorAlert.setCommandListener(this); errorAlert.setTimeout(Alert.FOREVER); Display.getDisplay(this).setCurrent(errorAlert); } } One additional point that sets this version of the MIDlet subclass apart from other examples in the book is that this time the commands, and all command actions except for dismissing an error alert, have been moved to the Canvas class because they re handled by a custom menu.

The biggest difference between the current and previous versions of the Security Application Block is the removal of authentication functionality. This is now a feature of the System.Web.Security namespace in .NET 2.0 and 3.0. Another change is the location of the configuration for the application block. In the previous version, it was in a separate securityConfiguration.config file. Now it is in the application configuration file by default.

Note In order to keep the ACME POS application as simple as possible the Security Application Block

CHAPTER 8 JOHNNXT IS ALIVE!

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