如何在Keycloak SPI扩展中编写简单的事务包装器？

public class SimpleTransactionManagerLookup implements TransactionManagerLookup {
    @Override
    public TransactionManager getTransactionManager() {
        // 返回你所使用的事务管理器实例
    }
}

public class SimpleTransactionWrapper implements TransactionWrapper {
    @Override
    public <T> T execute(TransactionTask<T> task) {
        TransactionManager tm = // 获取事务管理器
        Transaction tx = null;
        try {
            tm.begin();
            T result = task.execute();
            tm.commit();
            return result;
        } catch (Exception e) {
            if (tx != null) {
                try {
                    tx.rollback();
                } catch (Exception rollbackEx) {
                    // 处理回滚异常
                }
            }
            // 处理执行异常
        } finally {
            // 关闭事务
        }
        return null;
    }
}

org.keycloak.models.KeycloakTransactionManagerLookupFactory
com.example.SimpleTransactionManagerLookupFactory

public class SimpleTransactionManagerLookupFactory implements KeycloakTransactionManagerLookupFactory {
    @Override
    public TransactionManagerLookup create(KeycloakSession session) {
        return new SimpleTransactionManagerLookup();
    }
}

org.keycloak.models.KeycloakTransactionWrapperFactory
com.example.SimpleTransactionWrapperFactory

public class SimpleTransactionWrapperFactory implements KeycloakTransactionWrapperFactory {
    @Override
    public TransactionWrapper create(KeycloakSession session) {
        return new SimpleTransactionWrapper();
    }
}