How to use atomikos

Atomikos is a Java-based transaction management system that provides distributed transaction management capabilities for Java applications. To use Atomikos, you can follow these steps:

1. Download the Atomikos distribution package from the official website.
2. Configure Atomikos in your Java application by adding the necessary dependencies to your project's build file, and configuring the transaction manager in your application code.
3. Use the Atomikos API to create and manage distributed transactions in your Java code.

Here's an example of using Atomikos to manage a distributed transaction:

import com.atomikos.icatch.jta.UserTransactionManager;
import javax.transaction.*;

public class MyTransactionManager {
  private UserTransactionManager utm;

  public MyTransactionManager() {
    utm = new UserTransactionManager();
    utm.init();
  }

  public void doTransaction() {
    try {
      utm.begin();

      // Perform some transactional operation here

      utm.commit();
    } catch (Exception ex) {
      try {
        utm.rollback();
      } catch (SystemException se) {
        // Handle rollback exception here
      }
    }
  }
}

In this example, we create an instance of the `UserTransactionManager` class and initialize it. Then, we use the `begin()` method to start a new transaction, perform some transactional operation, and then commit the transaction using the `commit()` method. If an exception occurs during the transaction, we catch it and call the `rollback()` method to roll back the transaction.