Java Persistence with Hibernate 2nd phần 6 pps

... 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 ... again with Hibernate: 69 7 Creating and testing layered applications This chapter covers ■ Creating layered applications ■ Managed components and services...

Ngày tải lên: 12/08/2014, 19:21

... database-integrity rule in a single Java annotation and use Hibernate Validator to check instances of an annotated class at runtime. ■ Seam With Seam, you can integrate Hibernate Validator with the presentation ... bean can be removed from faces-config.xml. D E F G H I The Java EE 5.0 programming model 763 Overall, the application is transparent, with no obscure calls that mai...

Ngày tải lên: 12/08/2014, 19:21

... cache 60 6 ■ Controlling the second-level cache 61 1 13.5 Summary 61 2 14 Querying with HQL and JPA QL 61 4 14.1 Creating and running queries 61 5 Preparing a query 61 6 ■ Executing a query 62 5 Using ... entities and value types 160 4.2 Mapping entities with identity 161 Understanding Java identity and equality 162 ■ Handling database identity 162 ■ Database primary keys...

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 ... switch to field access). With annotations, declare immutability (and automatic refresh) with the @Generated Hibernate annotation: Mapping entities with identity 165 Type.AU...

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 ... well. With check="none" , Hibernate expects your custom procedure to deal inter- nally with failed updates (for example, by doing a version check of the row that Custom...

Ngày tải lên: 12/08/2014, 19:21

... 11.2 Hibernate and JPA comparison chart for chapter 11 Hibernate Core Java Persistence and EJB 3.0 Persistence context propagation is available 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 context propagation mo...

Ngày tải lên: 12/08/2014, 19:21

... mDate); The same query and code looks slightly different in Java Persistence: 61 6 CHAPTER 14 Querying with HQL and JPA QL 1 Create the query, with any arbitrary restriction or projection of data that 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. Que...

Ngày tải lên: 12/08/2014, 19:21