此内容没有您所选择的语言版本。

30.4. Entity Bean Locking and Deadlock Detection


This section provides information on what entity bean locking is and how entity beans are accessed and locked within JBoss. It also describes the problems you may encounter as you use entity beans within your system and how to combat these issues. Deadlocking is formally defined and examined. And, finally, we walk you through how to fine tune your system in terms of entity bean locking.

30.4.1. Why JBoss Needs Locking

Locking is about protecting the integrity of your data. Sometimes you need to be sure that only one user can update critical data at one time. Sometimes, access to sensitive objects in your system need to be serialized so that data is not corrupted by concurrent reads and writes. Databases traditionally provide this sort of functionality with transactional scopes and table and row locking facilities.
Entity beans are a great way to provide an object-oriented interface to relational data. Beyond that, they can improve performance by taking the load off of the database through caching and delaying updates until absolutely needed so that the database efficiency can be maximized. But, with caching, data integrity is a problem, so some form of application server level locking is needed for entity beans to provide the transaction isolation properties that you are used to with traditional databases.
返回顶部
Red Hat logoGithubredditYoutubeTwitter

学习

尝试、购买和销售

社区

关于红帽文档

通过我们的产品和服务,以及可以信赖的内容,帮助红帽用户创新并实现他们的目标。 了解我们当前的更新.

让开源更具包容性

红帽致力于替换我们的代码、文档和 Web 属性中存在问题的语言。欲了解更多详情,请参阅红帽博客.

關於紅帽

我们提供强化的解决方案,使企业能够更轻松地跨平台和环境(从核心数据中心到网络边缘)工作。

Theme

© 2025 Red Hat