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07: Debugging Spring Transaction Management

Never just trust that adding @Transactional annotation is going to create a transactional boundary for your service layer. EventRestController –> EventMergeProcesorImpl –> EventControlDAOImpl The @Transactional annotations added to “public” methods…

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9 Java Transaction Management Interview Q&As

Q1. What is a Transaction? A1. A transaction is a set of operations that should be completed as a unit. If one operation fails then all the other operations fail…

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Event sourcing & CQRS interview Q&As

Most feasible way to handle consistency across microservices is via eventual consistency. This model doesn’t enforce distributed ACID transactions across microservices. Event sourcing is an event-centric approach to business logic…

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JTA interview Q&A

Q1. What is a Transaction? What does setAutoCommit do? A1. A transaction is a set of operations that should be completed as a unit. If one operation fails then all…

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Spring, JavaConfig (@Configuration), and TransactionManager

This extedns configuring JDBC and JPA to configure the TransactionManager.

Example #1 Wiring JDBC Transaction Manager

Note: @EnableTransactionManagement annotation


@Configuration
@ImportResource("application.yml")
@EnableTransactionManagement
public class AppConfig
  
    @Bean
    public DriverManagerDataSource datasource() {
        DriverManagerDataSource ds = new DriverManagerDataSource();
        ds.setDriverClassName(environment.getRequiredProperty("spring.datasource.driver-class-name"));
        ds.setUrl(environment.getRequiredProperty("spring.datasource.url"));
        ds.setUsername(environment.getRequiredProperty("spring.datasource.username"));
        ds.setPassword(environment.getRequiredProperty("spring.datasource.password"));
        return ds;
    }
    
    @Bean
    public JdbcTemplate jdbcTemplate() {
        return new JdbcTemplate(datasource());
    }
    
    @Bean
    public DataSourceTransactionManager transactionManager() {
        final DataSourceTransactionManager transactionManager = new DataSourceTransactionManager(datasource());
        return transactionManager;
    }
}

@Configuration

@ImportResource("application.yml"

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Transaction management in SQL — Sybase example

Q. How do you perform transaction management in SQL stored procedures?
A. Handled with begin, commit, and rollback ‘tran’ commands in Sybase server.

Q. Why is it important?
A. It is important to leave the database in a consistent state.

Q. Can you give an example?…

Blog Archives

07: Debugging Spring Transaction Management

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9 Java Transaction Management Interview Q&As

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Event sourcing & CQRS interview Q&As

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JTA interview Q&A

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Spring, JavaConfig (@Configuration), and TransactionManager

Transaction management in SQL — Sybase example

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