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The first thing you probably notice in this code is that there is no Hibernate import anymore, only javax.peristence.*. The EntityManagerFactory is created with a static call to Persistence and the name of the persistence unit. The rest of the code should be self-explanatory you use JPA just like Hibernate, though there are some minor differences in the API, and methods have slightly different names. Furthermore, you didn t use the HibernateUtil class for static initialization of the infrastructure; you can write a JPAUtil class and move the creation of an EntityManagerFactory there if you want, or you can remove the now unused WORKDIR/src/persistence package. JPA also supports programmatic configuration, with a map of options:

a. Amount of system memory B. Number and type of network adapters c. Amount of free hard disk space D. Processor type and speed

For the exam, remember that Task Manager can show real-time information about the CPU, RAM, and virtual memory, but the measurements are fairly limited. To collect more detailed information, use the Performance console. The Performance console also allows you to collect performance data over a longer period.

Changing the base priority of a process determines how much processor time Windows XP Professional devotes to the process compared with other processes. By default, most processes run at a base priority of Normal. However, you can change the base priority for a process by using the following steps: 1. In Task Manager, on the Processes tab, click the View menu and then click Select Columns. 2. In the Select Columns dialog box, select Base Priority and then click OK. The Base Priority column now appears in the Task Manager window. 3. Right-click the process for which you would like to change the base priority. 4. On the shortcut menu that appears, point to Set Priority, and then select one of the following commands:

Map myProperties = new HashMap(); myProperties.put("hibernate.hbm2ddl.auto", "create-drop"); EntityManagerFactory emf = Persistence.createEntityManagerFactory("helloworld", myProperties);

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Custom programmatic properties override any property you ve set in the persistence.xml configuration file. Try to run the ported HelloWorld code with a fresh database. You should see the exact same log output on your screen as you did with native Hibernate the JPA persistence provider engine is Hibernate. Automatic detection of metadata We promised earlier that you won t have to list all your annotated classes or XML mapping files in the configuration, but it s still there, in hibernate.cfg.xml. Let s enable the autodetection feature of JPA. Run the Hello World application again after switching to DEBUG logging for the org.hibernate package. Some additional lines should appear in your log:

You should change the priority of processes only when there is a process that needs priority over (or is less important than) other running processes; even then, you should try to use only the AboveNormal, Normal, and BelowNormal levels. Setting a process at too high a base priority (such as RealTime) can consume enough system resources that other vital processes cannot function properly.

Windows XP Professional can support two processors running on the same computer. When two processors are installed, Windows XP Professional does a good job of assigning processes to processors based on need. However, you can assign a particular process to a specific processor. (This is referred to as assigning processor affinity to a process; of course, it is available only on computers with two processors or on computers with a hyperthreaded processor in which multiple processes can run simultaneously on one processor.) To assign a process to a processor, use the following steps: 1. In Task Manager, on the Processes tab, right-click a process and then click Set Affinity. 2. In the Processor Affinity dialog box, select the processors on which the process should be allowed to run. By default, both processors (CPU 0 and CPU 1) are selected for a processor.

... Ejb3Configuration:141 - Trying to find persistence unit: helloworld Ejb3Configuration:150 - Analyse of persistence.xml: file:/helloworld/build/META-INF/persistence.xml PersistenceXmlLoader:115 - Persistent Unit name from persistence.xml: helloworld Ejb3Configuration:359 - Detect class: true; detect hbm: true JarVisitor:178 - Searching mapped entities in jar/par: file:/helloworld/build JarVisitor:217 - Filtering: hello.HelloWorld JarVisitor:217 - Filtering: hello.Message

Controlling processor affinity can improve performance by reducing the number of processor cache flushes that occur as threads move from one processor to another. This might be a good option for dedicated file servers. However, be aware that dedicating a program to a particular processor might not allow other program threads to migrate to the leastbusy processor.