因而为了支持时限业务,802.1l标准定义了点协调功能PCF,使得STA在一个被称 为点协调器(PointCoordinator,PC)的工作站协调下按一定顺序进行无线媒体访问。
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为了有助于实现这一点,JCA事务合约定义了一套框架性接口,通过这套接口,应用程序服务器和EIS可以协调事务。
To help manage this, the JCA transaction contract defines a set of architected interfaces through which the application server and the EIS coordinate the transaction.
在维护企业LDM时,对模型的扩展可能同时在很多不同的项目中发生,并由一个模型管理器进行协调,所以这一点特别有用。
This is particularly useful in the maintenance of an enterprise LDM, where extensions to that model may be occurring within a number of distinct projects and are reconciled by a model manager.
有关联系协调器方法的信息保存在恢复日志中;使用Web服务,会有一个结束点参考(epr——在WS - Addressing中定义)。
Information on how to contact the coordinator is in the state saved on its recovery log; with web services it will be an end point reference (EPR — defined in WS-Addressing).
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