How to implement transaction control in Java multi-threading?

In Java, you can achieve multi-threaded transaction control using the following methods:

1. To achieve thread synchronization, the synchronized keyword can be used to ensure multiple threads execute in a specific order. This involves locking resources with the synchronized keyword at the beginning of a transaction and releasing the lock once the transaction is complete.
2. In Java, locks can be used to control concurrent access to shared resources and ensure transaction consistency. The Lock interface and ReentrantLock class provide mechanisms for locking. To obtain a lock, the lock() method of a Lock object can be used at the beginning of a transaction, and the lock can be released using the unlock() method after the transaction is completed.
3. Using a transaction manager: In some frameworks like the Spring framework, you can utilize a transaction manager to handle transactions. The transaction manager can provide consistency guarantees, ensuring that multiple threads execute within the same transaction. By using the @Transactional annotation, you can mark methods as transactional, automatically starting and committing transactions when executed.
4. Utilize database transactions: To control transactions when multiple threads are operating on a database, you can use the database’s transaction mechanism. This can be achieved by using Java’s JDBC or ORM frameworks like Hibernate to interact with the database. You can use the setAutoCommit(false) method of the Connection object to disable automatic submission when the transaction begins, and then use the commit() method to submit the transaction upon completion or the rollback() method to undo it.

Regardless of the method used, it is necessary to ensure the consistency and integrity of data between multiple threads. Additionally, care should be taken to avoid concurrency issues such as deadlocks and data races.