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21. 发明授权

US5761509A System and method for enabling before/after method processing in an object oriented system 失效
标题翻译：用于在面向对象的系统中实现方法处理之前/之后的系统和方法
公开(公告)号：US5761509A
公开(公告)日：1998-06-02
申请号：US800013
申请日：1997-02-13
申请人： Scott Harrison Danforth , Ira Richard Forman , Hari Haranath Madduri
发明人： Scott Harrison Danforth , Ira Richard Forman , Hari Haranath Madduri
IPC分类号： G06F9/44 , G06F9/42 , G06F9/40
CPC分类号： G06F9/443
摘要： A system for creating before and after behavior upon invocation of a method in an object-oriented system. The framework provides metaclasses containing methods for dispatching a before method and an after method at the time of invocation of each client method in subclass instances. Object-oriented system properties of inheritance and encapsulation are supported as are derived metaclasses. Derivation ensures that the specification syntax for each class does not impact the expected result. The combination of explicit before after classes, dispatcher class, and derived metaclasses ensures that the system will have associative composition.
摘要翻译：用于在面向对象系统中调用方法之前和之后创建行为的系统。在子类实例中调用每个客户端方法时，该框架提供了包含调用before方法和after方法的方法的元类。支持继承和封装的面向对象的系统属性，如派生元类。派生确保每个类的规范语法不会影响预期的结果。明确之后的类，调度器类和派生元类的组合确保系统将具有关联组合。

22. 发明授权

US5692120A Failure recovery apparatus and method for distributed processing shared resource control 失效
标题翻译：分布式处理故障恢复装置和方法共享资源控制
公开(公告)号：US5692120A
公开(公告)日：1997-11-25
申请号：US453610
申请日：1995-05-30
申请人： Ira Richard Forman , Hari Haranath Madduri
发明人： Ira Richard Forman , Hari Haranath Madduri
IPC分类号： G06F11/14 , G06F11/00
CPC分类号： G06F11/2046 , G06F11/2028 , G06F11/2041
摘要： Communicating the failure of master process controlling one or more shared resources to all processes sharing the resources. A shared resource control file is established that contains the identities of all sharing processes. Master process failure triggers a race to establish exclusive access over the shared control file. The new master reads shadow address data from the old shared control file, marks it as invalid and establishes a new control file based on renewed registrations from the sharing processes. The master process maintains the sharing process list as process begin and end sharing.
摘要翻译：沟通主进程的失败，控制一个或多个共享资源到共享资源的所有进程。建立了共享资源控制文件，其中包含所有共享进程的标识。主进程故障触发了通过共享控制文件建立独占访问的竞赛。新主人从旧的共享控制文件中读取影子地址数据，将其标记为无效，并根据共享进程的更新注册建立新的控制文件。主进程将共享进程列表维护为进程开始和结束共享。

23. 发明授权

US5664176A Moving write lock for replicated objects 失效
标题翻译：移动复制对象的写入锁
公开(公告)号：US5664176A
公开(公告)日：1997-09-02
申请号：US381623
申请日：1995-01-31
申请人： Hari Haranath Madduri
发明人： Hari Haranath Madduri
IPC分类号： G06F12/00 , G06F3/14 , G06F9/46 , G06F9/52 , G06F15/16 , G06F15/177 , H04L12/18 , G06F17/30
CPC分类号： G06F3/1454 , H04L12/1813 , G06F3/1423 , Y10S707/99938 , Y10S707/99952
摘要： Efficient update and presentation of a plurality of replicated data objects is accomplished with a write lock which moves among the replicas of a data object. After any necessary preparation for updating a data object, a shadow replica requests a write lock from the replica which currently holds the write lock or from the replica designated as the master replica. The write lock is moved to requesting shadow replica which performs an update to itself. The update is then reflected at the local system display to provide visual feedback to the user. The update is propagated to the other replicas which present the change at their associated displays. In the preferred embodiment, the write lock is retained at the replica which last requested the write lock as it is the most likely to receive the next update. While the invention finds particular application in a distributed data processing environment, it can also be used in a single processor having multiple replicas in separate memory partitions.
摘要翻译：通过在数据对象的副本之间移动的写锁来实现多个复制数据对象的有效更新和呈现。在更新数据对象所需的准备工作之后，卷影副本从当前保存写入锁定的副本或从指定为主副本的副本请求写入锁定。写锁定被移动到请求影子副本，该镜像对自身进行更新。该更新然后反映在本地系统显示器上，以向用户提供视觉反馈。该更新被传播到在其相关显示器上呈现更改的其他副本。在优选实施例中，写锁定保留在最后请求写锁定的副本中，因为它最有可能接收下一更新。虽然本发明在分布式数据处理环境中发现特定的应用，但是它也可以在具有分开的存储器分区中的多个副本的单个处理器中使用。

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