Java分散トランザクション処理の技術動向と今後の展望

class SagaStep {

    private Action action;
    private Compensation compensation;

    // 执行步骤
    public void execute() {
        action.execute();
    }

    // 补偿步骤
    public void compensate() {
        compensation.compensate();
    }
}

class Saga {

    private List<SagaStep> steps;

    // 执行 Saga
    public void execute() {
        for (SagaStep step : steps) {
            step.execute();
        }
    }

    // 回滚 Saga
    public void rollback() {
        for (int i = steps.size() - 1; i >= 0; i--) {
            steps.get(i).compensate();
        }
    }
}

// 事件监听器
@EventListener
public void handleTransactionEvent(TransactionEvent event) {
    // 根据事件类型执行相应操作
    switch (event.getType()) {
        case STARTED:
            // 执行事务步骤
            break;
        case COMMITTED:
            // 执行清理操作
            break;
        case ROLLBACKED:
            // 执行补偿操作
            break;
    }
}

// 分布式事务管理器
public interface TransactionManager {

    Transaction startTransaction();

    void commitTransaction(Transaction transaction);

    void rollbackTransaction(Transaction transaction);

}

// 微服务客户端
public class MicroserviceClient {

    private TransactionManager transactionManager;

    public void doWork() {
        Transaction transaction = transactionManager.startTransaction();
        // 执行事务操作
        if (// 操作失败) {
            transactionManager.rollbackTransaction(transaction);
        } else {
            transactionManager.commitTransaction(transaction);
        }
    }
}