The document introduces Spring's application context and XML-based configuration language. It demonstrates how to define beans and their dependencies, and how Spring manages the lifecycle by fully initializing beans before they are used, based on their declared dependencies. It shows how to create an application context which acts as a container that encapsulates the beans and conceals implementation details.

1. Spring Quick Start Introducing the Spring Application Context and Spring’s XML-based configuration language

2. Topics in this session Spring quick start Writing bean definitions Configuring objects Going beyond constructor instantiation Creating an application context Summary

3. How Spring Works Spring ApplicationContext Fully configured application system Ready for use Configuration Instructions Your Application Classes (POJOs) Creates

4. Your Application Classes public class TransferServiceImpl implements TransferService { public TransferServiceImpl(AccountRepository ar) { this . accountRepository = ar; } … } public class JdbcAccountRepository implements AccountRepository { public JdbcAccountRepository(DataSource ds) { this . dataSource = ds; } … } Needed to load accounts from the database Needed to perform money transfers between accounts

5. Configuration Instructions <beans> <bean id = “transferService” class = “app.impl.TransferServiceImpl” > <constructor-arg ref = “accountRepository” /> </bean> <bean id = “accountRepository” class = “app.impl.JdbcAccountRepository” > <constructor-arg ref = “dataSource” /> </bean> <bean id = “dataSource” class = “com.oracle.jdbc.pool.OracleDataSource” > <property name = “URL” value = “jdbc:oracle:thin:@localhost:1521:BANK” /> <property name = “user” value = “moneytransfer-app” /> </bean> </beans>

6. Creating and Using the Application // Create the application from the configuration ApplicationContext context = new ClassPathXmlApplicationContext( “application-config.xml” ); // Look up the application service interface TransferService service = (TransferService) context.getBean( “transferService” ); // Use the application service.transfer( new MonetaryAmount( “300.00” ), “1” , “2” );

7. Inside the Spring A pplication Context // Create the application from the configuration ApplicationContext context = new ClassPathXmlApplicationContext( “application-config.xml” ); Application Context OracleDataSource dataSource JdbcAccountRepository accountRepository TransferServiceImpl transferService

8. Quick Start Summary Spring manages the lifecycle of the application All beans are fully initialized before they are used Beans are always created in the right order Based on their dependencies Each bean is bound to a unique id The id reflects the service the bean provides to clients The ApplicationContext works as a container, encapsulating the bean implementations chosen for a given deployment Conceals implementation details

9. Topics in this session Spring quick start Writing bean definitions Configuring objects Going beyond constructor instantiation Creating an application context Summary

10. Register… To register for this training please visit http://www.springpeople.com/courses/regular/spr-001.php For further info please contact SpringPeople Technologies [email_address] +91 80 4114 6519 http://www.springpeople.com