如何使用 Apache Ignite 实现 Java 分布式事务

<dependency>
  <groupId>org.apache.ignite</groupId>
  <artifactId>ignite-core</artifactId>
  <version>2.15.0</version>
</dependency>

import org.apache.ignite.Ignite;
import org.apache.ignite.IgniteCache;
import org.apache.ignite.Ignition;
import org.apache.ignite.transactions.Transaction;
import org.apache.ignite.transactions.TransactionConcurrency;
import org.apache.ignite.transactions.TransactionIsolation;

public class MainNode {

  public static void main(String[] args) {
    // 初始化 Ignite 实例
    Ignite ignite = Ignition.start();

    // 获取账户缓存
    IgniteCache<Long, Account> accountCache = ignite.cache("Account");

    // 创建主事务
    try (Transaction tx = ignite.transactions().txStart(TransactionConcurrency.PESSIMISTIC,
        TransactionIsolation.REPEATABLE_READ)) {

      // 从缓存中加载账户
      Account account = accountCache.get(1L);

      // 提取 100 美元
      account.setBalance(account.getBalance() - 100);

      // 保存账户
      accountCache.put(1L, account);

      // 提交事务
      tx.commit();

      System.out.println("转账成功！");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

import org.apache.ignite.Ignite;
import org.apache.ignite.Ignition;
import org.apache.ignite.transactions.Transaction;
import org.apache.ignite.transactions.TransactionConcurrency;
import org.apache.ignite.transactions.TransactionIsolation;

public class SlaveNode {

  public static void main(String[] args) {
    // 初始化 Ignite 实例
    Ignite ignite = Ignition.start();

    // 获取账户缓存
    IgniteCache<Long, Account> accountCache = ignite.cache("Account");

    // 创建从事务
    try (Transaction tx = ignite.transactions().txStart(TransactionConcurrency.OPTIMISTIC,
        TransactionIsolation.SERIALIZABLE)) {

      // 从缓存中加载账户
      Account account = accountCache.get(1L);

      // 检查账户余额是否足够
      if (account.getBalance() < 100) {
        tx.rollback();  // 余额不足，回滚事务
      }

      // 提取 100 美元
      account.setBalance(account.getBalance() - 100);

      // 保存账户
      accountCache.put(1L, account);

      // 提交事务
      tx.commit();

      System.out.println("转账成功！");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

public class Account {

  private Long id;
  private double balance;

  // 省略 getters 和 setters
}