12/25/2023 0 Comments Transaction management![]() Instances ofthe TransactionTemplate classare thread safe, in these instances do not maintain any conversational state.Protected void doInTransactionWithoutResult(TransactionStatus status) If there is no return value, use the convenient TransactionCallbackWithoutResult class with an anonymous class as follows: transactionTemplate.execute(new TransactionCallbackWithoutResult() Public Object doInTransaction(TransactionStatus status) the code in this method executes in a transactional context Return transactionTemplate.execute(new TransactionCallback() ![]() (TransactionDefinition.ISOLATION_READ_UNCOMMITTED) (30) // 30 seconds the transaction settings can be set here explicitly if so desired hence better control ansactionTemplate = new TransactionTemplate(transactionManager) Public ServiceImpl(PlatformTransactionManager transactionManager) use constructor-injection to supply the PlatformTransactionManager Private final TransactionTemplate transactionTemplate Service Class: public class ServiceImpl implements Service Please note that the code snippets are referred from Spring Docs. Let's see how to implement this type with the help of below code (taken from Spring docs with some changes). Using the TransactionTemplate (Recommended by Spring Team): The Spring Framework provides two means of programmatic transaction management.Ī. Now, let us discuss each approach in detail. If you want to know the reason for this then read below else jump directly to Declarative transaction management section if you want to implement this option. You only use annotations or XML-based configuration to manage the transactions.ĭeclarative transactions are highly recommended. ![]() Declarative transaction management: This means you separate transaction management from the business code.That gives you extreme flexibility, but it is difficult to maintain. Programmatic transaction management: This means that you have to manage the transaction with the help of programming.Spring supports two types of transaction management: A lot of boilerplate needs to be written and if you want to call another method from this method then again you need to manage it in the code.The scope of the transaction is very clear in the code.Transaction transaction = entityManager.getTransaction() EntityManagerFactory factory = Persistence.createEntityManagerFactory("PERSISTENCE_UNIT_NAME") EntityManager entityManager = entityManagerFactory.createEntityManager() This is the legacy way of managing transaction. Programmatically manage by writing custom code Ways of Managing TransactionsĪ transaction can be managed in the following ways: 1. The most important aspect for developers is to understand how to implement transaction management in an application, in the best way. As a result, lots of code has to be reworked later or a developer implements transaction management without knowing how it actually works or what aspect needs to be used in their scenario.Īn important aspect of transaction management is defining the right transaction boundary, when should a transaction start, when should it end, when data should be committed in DB and when it should be rolled back (in the case of exception). Most of the time developers give little importance to transaction management.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |