UrTracks Data Access Frame

Spring's data access framework addresses the common challenges developers encounter when working with databases in applications. Support is provided for all popular Java data access frameworks: JDBC, iBatis / MyBatis, Hibernate, JDO, JPA, Oracle TopLink, Apache OJB and Apache Cayenne, among others.

For all these supported frameworks, Spring provides these features

Resource management - automatic acquisition and release of database resources

Exception handling - translation of the data access exception to a data access hierarchy Spring

Participation in transactions - transparent participation in current transactions

Unpacking resources - retrieving database objects from connection pool envelopes

Abstraction for BLOB and CLOB manipulation

All of these features are available when you use Spring model classes provided for each supported infrastructure. Critics have said that these template classes are intrusive and offer no advantage over using (for example) the Hibernate API directly. [17] [not in the given citation] In response, Spring developers have made it possible to use the Hibernate and JPA APIs directly. However, this requires transparent transaction management because the application code no longer assumes responsibility for obtaining and closing database resources and does not support exception translation.

With Spring's transaction management, its data access framework offers a flexible abstraction to work with data access frameworks. Spring Framework does not have a common data access API; Instead, the total power of the supported APIs is retained intact. Spring Framework is the only framework available in Java that provides managed data access environments outside of an application server or container.

When using Spring to manage transactions with Hibernate, the following beans can be configured:

·        data source like com.mchange.v2.c3p0.ComboPooledDataSource or org.apache.commons.dbcp.BasicDataSource

·       SessionFactory as org.springframework.orm.hibernate3.LocalSessionFactoryBean with a DataSource attribute

·         HibernateProperties like org.springframework.beans.factory.config.PropertiesFactoryBean

·          TransactionManager like org.springframework.orm.hibernate3.HibernateTransactionManager with a SessionFactory attribute