持久对象标识的生成方法

Persistent object identifier generating strategies

在对象持久化过程中,利用对象标识管理器为对象生成唯一标识,并与对象关联被存储在后台关系数据库中,对象标识的引入使维护对象之间关系变得更加容易,便于对持久对象的查询。对象标识管理器的设计,主要是对对象标识生成策略的封装。分析对象标识生成的若干种方法,并对各种方法进行了分析,设计持久层时,可以根据实际需要选择合适的对象标识生成策略。

When persisting objects, Object Identifier（OlD） is generated by OlD Manager. It is banded with this object and then stored to the relational database. It can make easier to maitain the relationship among the objects, at the same time it can make the query procedure more convenient. Designing an OlD Manager is to encapsulate the OlD generating algorithm. Analyzing several OlD generating strategies and their benefits and flaws ,developers can choose proper one for applications.