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Because the result set returns multiple entity types, we must define an @SqlResultSet Mapping. This annotation can be placed on an entity class or method. The entities() attribute is set to an array of @EntityResult annotations. Each @EntityResult annotation specifies the entities that will be returned by the native SQL query. The @javax.persistence.FieldResult annotation is used to explicitly map columns in the query with properties of an entity. The name() attribute of @FieldResult identifies the entity bean s property, and the column() attribute identifies the result set column returned by the native query. In this example, we do not need to specify any @FieldResults for Customer, as the native query pulls in each column for this entity. However, since we are querying only the ID and number columns of the CreditCard entity, an @FieldResult annotation should be specified. In the @EntityResult annotation for CreditCard, the fields() attribute defines what CreditCard properties each queried column maps to. Because the Customer and CreditCard primary-key columns have the same name, the SQL query needs to distinguish that they are different. The cc.id As CC_ID SQL fragment performs this identification.

The Performance Logs And Alerts service might not have permission to log on to the remote computer or to create and update the log file. The Remote Registry service is not running on the remote machine. The log file size limit might not be large enough to collect your requested data. The log update interval might be too short to allow the server to respond to each periodic data request.

Authenticating use of SMTP services. More information can be found in Les son 2. Configuring Transport Layer Security (TLS) encryption. Users can be required to use TLS, which is similar to Secure Sockets Layer (SSL), to connect to and communicate with the SMTP server. This requirement will secure data using encryption, but it does not implement user authentication.

In this practice, you use Performance Logs And Alerts to create a counter log and an alert for the LDAP Searches/Sec counter.

Java Persistence provides a mechanism so that you can predefine JPA QL or native SQL queries and reference them by name when creating a query. You would want to predeclare queries for the same reason you create String constant variables in Java: to reuse them in multiple situations. If you predefine your queries in one place, you have an easy way to fine-tune or modify them as time goes on. The @javax.persistence.Named Query annotation is used for predefining JPA QL queries:

Additional IIS services and components Do not install additional Web server components, such as the Network News Transfer Protocol (NNTP) ser vice, unless there is a clear business need for the service and a security design has been prepared.

In this exercise, you create a counter log by first defining the counters you want to log and then setting log file and scheduling parameters.

To create a counter log 1. Use the procedure provided earlier in this lesson to create a counter log named LDAP Searches Per Sec for Server1. 2. Select the NTDS performance object and the LDAP Searches/Sec counter to log.

Manage Access to Files and Folders In addition to managing services, you must address these areas of Windows Server 2003: the file system location and the use of access control lists (ACLs) on files, folders, and registry keys. The following list sum marizes several Web-specific issues:

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package javax.persistence; public @interface NamedQuery { String name( ); String query( ); QueryHint[] hints( ) default {}; }