Java Persistence with Hibernate 2nd phần 7 ppt

... with thread or JTA transaction binding in Java SE and Java EE. Persistence contexts are either scoped to the transaction, or managed by the application. Java Persistence standardizes a persistence ... manipulate the Hibernate default behavior when objects are loaded and stored. Table 11.2 Hibernate and JPA comparison chart for chapter 11 Hibernate Core Java Persiste...

Ngày tải lên: 12/08/2014, 19:21

... benchmarks 74 4 16.6 Summary 74 6 17 Introducing JBoss Seam 74 7 17. 1 The Java EE 5.0 programming model 74 8 Considering JavaServer Faces 74 9 ■ Considering EJB 3.0 75 1 Writing a web application with JSF ... 3.0 75 2 Analyzing the application 76 2 17. 2 Improving the application with Seam 76 5 Configuring Seam 76 6 ■ Binding pages to stateful Seam components 76 7 ■ An...

Ngày tải lên: 12/08/2014, 19:21

... the expressiveness and flexibility that you’re used to. This isn’t the case with Hibernate and Java Persistence. Hibernate s powerful query facilities allow you to express almost everything you ... navigating associations to new Criteria s. With the Java Persistence API, your starting point for queries is the EntityMan- ager . To create a javax .persistence. Query insta...

Ngày tải lên: 12/08/2014, 19:21

... rewrite the main application code with JPA. “Hello World” with JPA These are your primary programming interfaces in Java Persistence: ■ javax .persistence. Persistence —A startup class that provides ... <all required libraries> +src +hello HelloWorld .java Message .java Message.hbm.xml +persistence HibernateUtil .java hibernate. cfg.xml (or hibernate. properties) log...

Ngày tải lên: 12/08/2014, 19:21

... Also, the Java Persistence interfaces don’t support full polymorphic queries; only mapped entities ( @Entity ) can be officially part of a Java Persistence query (note that the Hibernate query ... to extend Hibernate& apos;s functionality with the pow- erful custom mapping type system. In chapters 6 and 7, we show you how to map Java collections and associations between clas...

Ngày tải lên: 12/08/2014, 19:21

... right one). Without extending Hibernate, you can choose from the following collections: ■ A java. util.Set is mapped with a <set> element. Initialize the collection with a java. util.HashSet . ... Ini- tialize with a java. util.ArrayList . ■ A java. util.Collection can be mapped with <bag> or <idbag> . Java doesn’t have a Bag interface or an imple...

Ngày tải lên: 12/08/2014, 19:21

... to a new Session (with update() or saveOrUpdate() ), Hibernate may execute unnecessary SQL UPDATE statements to ensure that the database state is synchro- nized with the persistence context ... cases. Also note that this mapping Figure 7. 15 Using a discriminator column with an any association 318 CHAPTER 7 Advanced entity association mappings Hibernate executes a UNION...

Ngày tải lên: 12/08/2014, 19:21

... level (the database) and how you work with transactions in an application that is based on native Hibernate, on Java Persistence, and with or without Enterprise JavaBeans. Transactions allow you ... annotated with @Tran- sient or the transient Java keyword). In this code example, the next synchroni- zation with the database occurs when the resource-local transaction is comm...

Ngày tải lên: 12/08/2014, 19:21

... are the same. Java Persistence standardizes JPA QL and also allows the fallback to native SQL. 15.2.3 Native SQL in Java Persistence Java Persistence supports native SQL queries with the createNativeQuery() method ... The persistence layer facade we introduced here doesn’t expose any Hiber- nate or Java Persistence interface to the client, so theoretically you can im...

Ngày tải lên: 12/08/2014, 19:21

... method, with literal arguments. Figure 17. 11 Seam decorates the input fields with validation error messages. The Java EE 5.0 programming model 75 9 You can call the session bean shown in listing 17. 4 ... #{itemEditor.itemId} , so Seam Figure 17. 7 Seam participates in the processing of the edit action. Validating user input 79 9 17. 4.3 Internationalization with Seam The first s...

Ngày tải lên: 12/08/2014, 19:21