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    • 31. 发明授权
    • High availability presence engine for instant messaging
    • 用于即时消息的高可用性存在引擎
    • US07949712B2
    • 2011-05-24
    • US10364273
    • 2003-02-10
    • Lee G. Friedman
    • Lee G. Friedman
    • G06F15/16
    • H04L67/1002H04L29/06H04L51/04H04L67/1008H04L67/1034H04L67/1036H04L67/24H04L69/329
    • Systems for a high availability presence engine for instant messaging service comprise a plurality of presence engines for receiving presence information on users and a global table engine accessible to the plurality of presence engines. The global table engine includes user presence information and receives presence changes from the plurality of presence engines. A plurality of local tables are accessible to the plurality of presence engines and the global table engine. The plurality of local tables are configured such that each of the plurality of local tables is associated with at least one of the plurality of presence engines, and is configured to receive presence change information from the global table engine. Other systems and methods are also provided.
    • 用于即时消息收发服务的高可用性存在引擎的系统包括用于接收用户的存在信息和多个存在引擎可访问的全局表引擎的多个存在引擎。 全局表引擎包括用户呈现信息并且从多个存在引擎接收存在改变。 多个本地表可以被多个存在引擎和全局表引擎访问。 多个本地表被配置为使得多个本地表中的每一个与多个存在引擎中的至少一个相关联,并且被配置为从全局表引擎接收存在改变信息。 还提供了其他系统和方法。