vb.net code to print barcode Understanding the Transaction interface in Java

Generating PDF417 in Java Understanding the Transaction interface

12.5.2 Understanding the Transaction interface
Draw PDF417 In Java
Using Barcode generator for Java Control to generate, create PDF-417 2d barcode image in Java applications.
www.OnBarcode.com
PDF 417 Decoder In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Recall the factory method called newTransaction() on the TransactionConfig class discussed in the previous section. The return value of that method is a Transaction instance. The Transaction interface describes the behavior necessary to support transactions within the iBATIS framework. It s a pretty typical set of functionality, which will be familiar to anyone who has worked with transactions before. The Transaction interface looks like this:
Making Barcode In Java
Using Barcode creator for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Code 39 Maker In Java
Using Barcode generator for Java Control to generate, create Code39 image in Java applications.
www.OnBarcode.com
public interface Transaction { public void commit() throws SQLException, TransactionException; public void rollback() throws SQLException, TransactionException;
Encode UCC - 12 In Java
Using Barcode encoder for Java Control to generate, create UPC Symbol image in Java applications.
www.OnBarcode.com
Printing UCC.EAN - 128 In Java
Using Barcode drawer for Java Control to generate, create EAN / UCC - 14 image in Java applications.
www.OnBarcode.com
Summary
Encode GS1 - 13 In Java
Using Barcode creator for Java Control to generate, create UPC - 13 image in Java applications.
www.OnBarcode.com
Generate USPS OneCode Solution Barcode In Java
Using Barcode generator for Java Control to generate, create USPS Intelligent Mail image in Java applications.
www.OnBarcode.com
public void close() throws SQLException, TransactionException; public Connection getConnection() throws SQLException, TransactionException; }
Paint PDF-417 2d Barcode In None
Using Barcode drawer for Software Control to generate, create PDF-417 2d barcode image in Software applications.
www.OnBarcode.com
Paint PDF417 In None
Using Barcode maker for Font Control to generate, create PDF417 image in Font applications.
www.OnBarcode.com
There s really nothing special about this particular interface. If you have any experience with transactions at all, it will look familiar. The commit() method is, as expected, the means of making permanent all of the changes involved in the unit of work. The rollback() method, on the other hand, is meant to undo all of the changes that have occurred in the unit of work, or at least since the last commit. The close() method is responsible for releasing any, and all, resources that may have been allocated or reserved for the transaction. The last method, getConnection(), is the one that you may not have expected. By design, iBATIS is a high-level framework around the JDBC API. Loosely speaking, the connection is the transaction in JDBC. At the very least, transactions are managed, controlled, and understood at the JDBC connection level. For that reason, most transaction implementations are bound to a Connection instance. This is useful, because iBATIS needs access to the connection currently associated to the transaction.
Barcode Encoder In VS .NET
Using Barcode generation for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Scanning QR Code In C#
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
12.6 Summary
Creating QR Code In None
Using Barcode drawer for Software Control to generate, create QR Code image in Software applications.
www.OnBarcode.com
Creating Data Matrix ECC200 In VS .NET
Using Barcode drawer for Reporting Service Control to generate, create DataMatrix image in Reporting Service applications.
www.OnBarcode.com
In this chapter we ve explored various ways of extending iBATIS. Standard extensions are important, even for open source software, to avoid uncontrolled customization of the framework in potentially undesirable and unmaintainable ways. iBATIS supports a number of different extensions, including TypeHandlerCallback, CacheController, DataSourceFactory, and TransactionConfig. TypeHandlerCallback is the most common type of extension, since it deals with the common problem of proprietary data types. TypeHandlerCallback is simple to implement; it requires only a few methods to be implemented that allow for customization of the mapping between Java types and JDBC types. In a nutshell, TypeHandlerCallback becomes responsible for setting parameters on statements, getting results from the result set, and translating null value replacements for mapping nullable database types to non-nullable Java types. CacheControllers provide a simple means of integrating third-party caching solutions into iBATIS. Of course, you could also write your own, but writing a decent cache is amazingly difficult. The CacheController interface includes methods for
Read PDF417 In Visual Basic .NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Generate Universal Product Code Version A In None
Using Barcode creator for Microsoft Word Control to generate, create UPC-A Supplement 2 image in Office Word applications.
www.OnBarcode.com
Extending iBATIS
Creating Code 128A In None
Using Barcode creator for Software Control to generate, create Code 128 Code Set B image in Software applications.
www.OnBarcode.com
UPC-A Supplement 5 Scanner In VS .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
configuring the implementation, putting items in the cache, retrieving items from the cache, and removing or flushing items from the cache. A DataSourceFactory is responsible for configuring and providing access to a standard JDBC DataSource implementation. You ll likely be configuring some third-party DataSources, unless you have a really compelling reason to write your own, which we suggest avoiding if possible. The DataSourceFactory has only two methods: one configures the DataSource, and the other provides access to the DataSource. The TransactionConfig and Transaction interfaces are the most complex to implement and the least common as well. Situations that require a custom TransactionConfig should be rare, but if you absolutely need to, iBATIS allows you to write your own. These are the standard, supported extension points in iBATIS. Wherever possible, iBATIS uses interfaces by design to allow you to replace existing functionality. We couldn t explore all of the possibilities in this chapter, or even in this book, but if you look through the code, most layers of the design offer a decent separation of interface and implementation. In most cases the design will be similar to that presented here.
Draw QR Code In Java
Using Barcode creator for Eclipse BIRT Control to generate, create QR Code ISO/IEC18004 image in BIRT applications.
www.OnBarcode.com
Create Barcode In Objective-C
Using Barcode printer for iPad Control to generate, create Barcode image in iPad applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.