The transaction manager asks all the resource managers to prepare to commit recoverableresources (prepare).
事务管理器请求所有资源管理器准备提交可恢复资源(准备)。
2
Upon receipt of the commit flow, the resource manager finalizes the updates to recoverableresources, and releases any locks held on the resources.
资源管理器一收到提交流程就结束对可恢复资源的更新，并且释放所有抓住资源不放的锁。
3
This procedure provides full transactional support between a database and other recoverableresources that support the XA protocol, such as WebSphere MQ.