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    • 7. 发明授权
    • Method and apparatus for determining the type of an object in a
distributed object system
    • 用于确定分布式对象系统中的对象的类型的方法和装置
    • US5793965A
    • 1998-08-11
    • US408633
    • 1995-03-22
    • Peter VanderbiltDavid M. BrownellAlain DemourDwight F. HareMichael L. Powell
    • Peter VanderbiltDavid M. BrownellAlain DemourDwight F. HareMichael L. Powell
    • G06F13/00G06F9/44G06F9/46
    • G06F9/465
    • A method of checking the type of an object located on a remote computer in a distributed object environment computing system is disclosed. Initially, a type checking method to determine whether a remotely located object is of a specified type is invoked. In the invocation, a target interface identifier is included as an argument. A determination is then made as to whether the target interface identifier is equal to or a base for an apparent interface identifier held by a proxy object located on the first computer. If the target interface identifier is determined to be equal to or a base for the apparent interface identifier, an affirmative indication to that effect is returned to the client process. If not, then the target interface identifier is then compared to a real interface identifier. In many embodiments, a call to the server host will have to be made in order to determine the real interface identifier. In some embodiments, a local cache memory can also be provided to store the results of such inquiries. The target interface identifier is then compared to the real interface identifier and a determination is made as to whether the target interface identifier is equal to or a base for the real interface identifier. The result is then returned to the client process. A method of checking the type of an object and additionally returning an output proxy object is also disclosed. The output proxy object may be the original input proxy object that has been widened to the class associated with the target interface identifier, or may be a newly created proxy object that is of the same kind as the input proxy and of the same type as the target interface identifier.
    • 公开了一种在分布式对象环境计算系统中检查位于远程计算机上的对象的类型的方法。 最初,调用用于确定远程位置的对象是否是指定类型的类型检查方法。 在调用中,包含目标接口标识符作为参数。 然后确定目标接口标识符是否等于或由位于第一计算机上的代理对象持有的明显接口标识符的基础。 如果目标接口标识符被确定为等于或明显接口标识符的基础,那么肯定的指示将返回到客户端进程。 如果没有,则将目标接口标识符与真实接口标识符进行比较。 在许多实施例中,必须进行对服务器主机的呼叫以便确定真正的接口标识符。 在一些实施例中,还可以提供本地高速缓冲存储器来存储这种查询的结果。 然后将目标接口标识符与实际接口标识符进行比较,并且确定目标接口标识符是否等于或者是真实接口标识符的基准。 然后将结果返回给客户端进程。 还公开了一种检查对象的类型并另外返回输出代理对象的方法。 输出代理对象可以是被扩展到与目标接口标识符相关联的类的原始输入代理对象,或者可以是新创建的与输入代理相同类型的代理对象,并且与 目标接口标识符。
    • 10. 发明授权
    • Methods and apparatus for managing collections of objects
    • 用于管理对象集合的方法和装置
    • US06353860B1
    • 2002-03-05
    • US08996784
    • 1997-12-23
    • Dwight F. HareRobert B. HagmannMichael L. PowellAlan SnyderPeter Vanderbilt
    • Dwight F. HareRobert B. HagmannMichael L. PowellAlan SnyderPeter Vanderbilt
    • G06F954
    • G06F9/465
    • A variety of methods, apparatus and data structures for managing collections of objects are described. In one aspect of the invention, an object that is intended for use in a distributed object operating environment has a structure including a group designation, a co-activation designation and a co-process designation. The group designation is arranged to identify a group to which the object belongs. The group is defined as a collection of objects which share a common persistent state. The co-activation designation is arranged to identify a co-activation set to which the object belongs. The co-activation set is a collection of objects which are to be activated at the same time. The co-process designation is arranged to identify a co-process set to which the object belongs. The co-process set is a collection of objects which are to be activated within a single process. A various embodiments, a variety of methods of utilizing one or more of these designations to facilitate efficient operation of a distributed computing system are also described. In some applications, a particular object may be conceptually divided into a plurality of sub-objects, with each sub-object having its own portion of persistent memory. In this embodiment, the particular object may only be invoked as a whole, but the object is provided with a mechanism for accessing the selected sub-object in response to a call from a client object that invokes the object and identifies the sub-object in a sub-object field of an object reference that refers to the object. When sub-objects are use, the object references may be arranged to include a host identifier, an object identifier and a sub-object field.
    • 描述了用于管理对象集合的各种方法,装置和数据结构。 在本发明的一个方面,旨在用于分布式对象操作环境中的对象具有包括组指定,协同激活指定和协处理指定的结构。 组名称被安排为标识对象所属的组。 该组被定义为共享公共持久状态的对象的集合。 协同激活名称被设置为识别对象所属的共同激活集合。 共同激活集合是要同时激活的对象的集合。 协处理指定被设置为识别对象所属的协同处理集合。 协同处理集合是在单个进程中被激活的对象的集合。 还描述了各种实施例,利用这些指定中的一个或多个来促进分布式计算系统的有效操作的各种方法。 在一些应用中,特定对象可以在概念上被划分为多个子对象,每个子对象具有其自己的持久存储器部分。 在该实施例中,特定对象可以仅作为整体被调用,但是该对象被提供有用于响应于来自调用该对象的客户端对象的调用来访问所选择的子对象的机制,并且识别该子对象 引用对象的对象引用的子对象字段。 当使用子对象时,对象引用可以被布置为包括主机标识符,对象标识符和子对象字段。