Introduction to the "Affairs JTA" framework in the Java class library

Transaction refers to a group of operations, which are either successfully completed or all failed.In database operations, transactions can ensure data consistency and integrity.Java Transaction API (JTA) is a Java class library used to support distributed transactions. JTA is part of the Java EE platform, which provides a set of API that allows applications to handle distributed transactions in a unified way.JTA and Java database connection (JDBC) and Java persistent API (JPA) can be closely combined, which can achieve transaction boundaries in distributed applications. The following is an example code using the JTA framework for transaction management: import javax.transaction.UserTransaction; import javax.naming.Context; import javax.naming.InitialContext; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; public class JtaExample { private static final String PERSISTENCE_UNIT_NAME = "myPersistenceUnit"; public static void main(String[] args) { try { // Get jndi context Context ctx = new InitialContext(); // Get the usertransaction object UserTransaction ut = (UserTransaction) ctx.lookup("java:comp/UserTransaction"); // Starting transaction ut.begin(); // Create a physical manager factory EntityManagerFactory emf = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME); // Create a physical manager EntityManager em = emf.createEntityManager(); // Execute the database operation (for example, insert data) // ... // Submit a transaction ut.commit(); // Turn off the physical manager em.close(); // Close the physical manager factory emf.close(); } catch (Exception e) { e.printStackTrace(); } } } In the above example, we obtain the JNDI context to obtain the UserTransaction object.Then we use the UserTransaction object to start and submit transactions.Next, we create a physical manager factory and entity manager to perform database operations.Finally, we turn off the entity manager and physical manager factory. Using the JTA framework can ensure the consistency of transaction during database operations in a distributed environment.It allows developers to handle distributed transactions through a unified API and closely consolidate with JDBC and JPA, providing a convenient way to manage transactions.By using JTA, developers can better control, manage and protect data in applications.