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When you first start Event Viewer, it automatically displays all events that are recorded in the selected log. Because many events occur on a computer running Windows XP Professional, the number of events displayed can make it difficult to find the events you are looking for. To change what appears in the log, you can locate selected events by using the Filter command. You can also search for specific events by using the Find command. To filter or find events, start Event Viewer, and then on the View menu, click Filter or click Find. The options provided by Filter and Find are almost identical. Figure 18-9 shows the options available on the Filter tab.

Figure 18-9

@In(create=true) private transient FacesMessages facesMessages;

Table 18-2 describes the options for using the Filter tab to filter events and the Find command to find events.

18-16

private String verifyPassword; public String getVerifyPassword() { return verifyPassword; } public void setVerifyPassword(String verifyPassword) { this.verifyPassword = verifyPassword; }

18

Table 18-2

The package might not appear in the Select A Package dialog box because the distribution point has not yet been successfully updated with the source files. However, the more likely reason is that Alice has not created a program for the package.

public String doRegister() { if (!currentUser.getPassword().equals(verifyPassword)) { facesMessages.add("Passwords didn't match!") verifyPassword = null; return null; }

Description The types of events to view The software or component driver that logged the event The type of event, such as a logon or logoff attempt or a system event An event number to identify the event. This number helps product support representatives track events. A user logon name A computer name The date ranges for which to view events (Filter dialog box only) Clears any changes in this tab and restores all defaults The text that is in the description of the event (Find dialog box only) The direction (up or down) in which to search the log (Find dialog box only) Finds and displays the next occurrence defined by the Find Settings (Find dialog box only)

Option Event Types Event Source Category Event ID User Computer From And To Restore Defaults Description Search Direction Find Next

em.createQuery("select u.username from User u" + " where u.username = :uname") .setParameter("uname", currentUser.getUsername()) .getResultList(); if (existing.size() != 0) { facesMessages.add("User exists!"); return null; } else { em.persist(currentUser); facesMessages.add("Registration complete."); return "login"; }

You can configure the properties of each individual log. To configure the settings for logs, right-click the log in Event Viewer, and then click Properties to display the Properties dialog box for the log. Use the Properties dialog box for each type of audit log to control the following:

The maximum size of each log, which can be from 64 KB to 4,194,240 KB (4 GB). The default size is 512 KB. The action that Windows XP Professional takes when the log fills up. To control this action, click one of the options described in Table 18-3.

@Remove @Destroy public void destroy() {} }

Description You might lose information if the log becomes full before you archive it. However, this setting requires no maintenance.

Table 18-3

The register Seam component is created by Seam and destroyed when the event context is destroyed, which is the scope of a single JSF request. Seam injects the currentUser, aliased from the contextual variable in the session context. Seam injects (or creates, if the variable can t be found in any context) an instance of FacesMessages. This is a convenient helper if you need to send messages to a JSF page; you used it before without injection but through manual lookup. The verifyPassword field of this component is synchronized with the JSF form. This method implements the main logic for registration of a new account. It s called after Hibernate Validator checks the currentUser. The two passwords entered by the user have to match; otherwise an error message is shown above the form. The null outcome triggers a redisplay of the login form with the error message. Usernames are unique in the database. This multirow constraint can t be checked in-memory by Hibernate Validator. You need to execute a database query and validate the username. If all validations pass, you persist() the currentUser object; the persistence context is flushed, and the transaction is committed when the doRegister() method returns. The outcome login redirects the user back to the login page, where the Registration complete message is rendered above the login form.