java - 从 beforeCompletion TransactionSynchronization 回滚事务？

Question

我正在使用 Spring TransactionSynchronizationManager 注册一个 beforeCompletion 回调，如下所示:

@Transactional
public void doTransaction() {
    //do DB stuff
    updateDB();

    //register a synchronization
    TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronization() {
        @Override
        public void beforeCompletion() {
            if(!isCallApiSuccessful()) {
                //rollback the transaction
            }
        }
    });
}

问题是如何从 beforeCompletion 回调中回滚事务？抛出异常会起作用吗？

Answer 1

Would throwing an exception work?

不，它不会工作，因为 beforeCompletion() 用于清理资源。
根据文档，以下是抛出异常的效果:

Throws:

java.lang.RuntimeException - in case of errors; will be logged but not propagated (note: do not throw TransactionException subclasses here!)

您可能应该实现 void beforeCommit(boolean readOnly) 来实现这一点，如果您想阻止提交，则在其中抛出 RuntimeException 。
根据文档，以下是抛出异常的效果:

Throws:

java.lang.RuntimeException - in case of errors; will be propagated to the caller (note: do not throw TransactionException subclasses here!)