manning Hibernate in Action phần 4 potx

... available in the package net.sf .hibernate. mapping . Keep in mind that adding a property to an existing persistent class mapping as shown here is easy, but programmatically creating a new mapping ... the distinction between entities and value types in Hibernate. These concepts are required for fine-grained object modeling. 3.5 Fine-grained object models A major objective of the...

Ngày tải lên: 06/08/2014, 02:20

... achieved using shared read locks and exclusive write locks. Reading transactions block writing transactions (but not other reading transactions), and writing transactions block all other transactions. ... the job of the Hibernate mapping types, and string is the name of a built -in Hiber- nate mapping type. The string mapping type isn’t the only one built into Hibernate; Hibernat...

Ngày tải lên: 06/08/2014, 02:20

... identifier 140 ■ Introducing HQL 141 Query by criteria 142 ■ Query by example 143 ■ Fetching strategies 143 ■ Selecting a fetching strategy in mappings 146 Tuning object retrieval 151 4. 5 ... Using Hibernate in a servlet engine 296 Using Hibernate in an EJB container 311 8.2 Implementing application transactions 320 Approving a new auction 321 ■ Doing it the hard...

Ngày tải lên: 06/08/2014, 02:20

... <jose.romero@galicia.seresco.es> integrating Hibernate Introducing and This chapter covers ■ Hibernate in action with “Hello World” ■ The Hibernate core programming interfaces ■ Integration with managed ... when you begin using Hibernate. Section 2.3 covers the problem of configuring Hibernate in some detail. Transaction interface The Transaction interface is...

Ngày tải lên: 06/08/2014, 02:20

... elements in our mapping files. This approach is time-consuming and easily forgotten. Instead, we can implement Hibernate s NamingStrategy interface, as in listing 3.5 Listing 3.5 NamingStrategy ... <jose.romero@galicia.seresco.es> 54 CHAPTER 2 Introducing and integrating Hibernate Here is an example Hibernate configuration that binds the SessionFactory to the name...

Ngày tải lên: 06/08/2014, 02:20

... <jose.romero@galicia.seresco.es> 146 CHAPTER 4 Working with persistent objects 4. 4.6 Selecting a fetching strategy in mappings Hibernate lets you select default association fetching strategies by specifying attributes in ... question: How did Hibernate know which children were detached and which were new transient instances? 4. 3 .4 Distinguishing between transient and...

Ngày tải lên: 06/08/2014, 02:20

... public static final Rating EXCELLENT = new Rating("Excellent"); public static final Rating OK = new Rating("OK"); public static final Rating LOW = new Rating("Low"); ... static final Map INSTANCES = new HashMap(); static { INSTANCES.put(EXCELLENT.toString(), EXCELLENT); INSTANCES.put(OK.toString(), OK); INSTANCES.put(LOW.toString(), LOW); } private...

Ngày tải lên: 06/08/2014, 02:20

... expressing (inner and outer) joins: ■ An ordinary join in the from clause ■ A fetch join in the from clause ■ A theta-style join in the where clause ■ An implicit association join Later, ... candidates for a join operation. What most people think of when they hear the word join in the context of SQL databases is an inner join. An inner join is one of several types o...

Ngày tải lên: 06/08/2014, 02:20

... <jose.romero@galicia.seresco.es> 346 CHAPTER 8 Writing Hibernate applications It’s illegal to invoke the original Hibernate Session from an Interceptor call- back. The session is in a fragile state during interceptor ... rendered and actions are exe- cuted). It’s also responsible for committing any pending database transactions. See the doFilter() method of this servlet...

Ngày tải lên: 06/08/2014, 02:20

... processes In some projects, the development of a domain model is driven by developers ana- lyzing the business domain in object-oriented terms. In others, it’s heavily influ- enced by an existing relational ... table: insert into ITEM values (4, 'Fum', 45 .0) An SQL update modifies an existing row: update ITEM set INITIAL_PRICE = 47 .0 where ITEM_ID = 4 ITEM ITEM_ID N...

Ngày tải lên: 06/08/2014, 02:20