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    • 1. 发明授权
    • System for managing unit-of-work identifiers when a chained,
distributed, two phase commit transaction system is severed
    • 当链接,分布式,两阶段提交事务系统被切断时,用于管理工作标识符的系统
    • US5371886A
    • 1994-12-06
    • US164656
    • 1993-12-09
    • Kathryn H. BrittonAndrew P. CitronBruce G. Lindsay
    • Kathryn H. BrittonAndrew P. CitronBruce G. Lindsay
    • G06F12/00G06F11/14G06F15/40
    • G06F11/1402Y10S707/99953
    • A method of managing unit-of-work identifiers in a chained distributed database transaction system. The system has a plurality of processing nodes which are logically connected to form a tree. Normally, each node automatically increments its present identifier at the end of processing each transaction to derive the next transaction identifier. However, in response to a failure condition which results in a severed tree, the distributed database that now reside in the first and second subtrees that result from the severance are forced to consistent states. The transaction identifier is incremented in each of the nodes of the first subtree. Transaction work in the first subtree then proceeds with the incremented identifier. The second subtree is dismantled. In response to a nonfailure condition which results in a severed tree, the distributed database in the first and second subtrees that result from the nonfailure severance is committed to a permanent state. The transaction identifier in each of the nodes of the first subtree is incremented. Transaction work in the first subtree then proceeds with the incremented identifier. A new transaction identifier is generated and propagated to all nodes of the second subtree. Transaction work in the second subtree then proceeds with the new identifier.
    • 一种在链式分布式数据库事务系统中管理工作单元标识符的方法。 系统具有多个处理节点,逻辑上连接以形成一个树。 通常,每个节点在处理每个事务结束时自动递增其当前标识符以导出下一个事务标识符。 然而,响应于导致切断的树的故障条件,现在驻留在由切断导致的第一和第二子树中的分布式数据库被强制为一致的状态。 交易标识符在第一个子树的每个节点中递增。 然后在第一个子树中进行事务处理,然后继续增加标识符。 第二个子树被拆除。 响应导致切断的树的非失败条件,由非故障中断导致的第一和第二子树中的分布式数据库被承诺为永久状态。 第一个子树的每个节点中的事务标识符递增。 然后在第一个子树中进行事务处理,然后继续增加标识符。 生成新的事务标识符并将其传播到第二个子树的所有节点。 然后,第二个子树中的事务工作继续使用新的标识符。
    • 3. 发明授权
    • Methods, systems and computer program products for synchronization of queue-to-queue communications
    • 用于队列到队列通信同步的方法,系统和计算机程序产品
    • US06401136B1
    • 2002-06-04
    • US09191637
    • 1998-11-13
    • Kathryn H. BrittonAndrew P. CitronBarron C. Housel, IIIAjamu Akinwunmi Wesley
    • Kathryn H. BrittonAndrew P. CitronBarron C. Housel, IIIAjamu Akinwunmi Wesley
    • G66F946
    • G06F9/546
    • Methods, systems, and computer program products are provided for communicating between a source device and a destination device over an external communication link by transmitting a message stored in a source persistent queue at the source device over the external communication link to the destination device. The transmitted message has transmitted with it an associated sequence identifier which identifies the message stored in the source persistent queue. The transmitted message and the associated sequence identifier are received at the destination device and stored in a destination persistent queue at the destination device. Occasionally, a commit message is transmitted to the source device from the destination device which identifies a sequence identifier associated with received message which has been persistently stored in the destination persistent queue. The persistently stored message in the destination persistent queue is made available to users of the destination device independent of whether a commit message identifying the message has been transmitted to the source device.
    • 提供方法,系统和计算机程序产品,用于通过外部通信链路通过外部通信链路发送存储在源设备的源持久队列中的消息,在源设备和目的地设备之间进行通信。 发送的消息已经与其一起发送了相关联的序列标识符,其标识存储在源持久队列中的消息。 发送的消息和相关联的序列标识符在目的地设备处被接收并存储在目的地设备的目的地持续队列中。 有时候,从目的地设备向源设备发送提交消息,该目的设备标识与已经持久存储在目的地持续队列中的接收到的消息相关联的序列标识符。 目的地持续队列中持续存储的消息对于目标设备的用户是可用的,而与标识消息的提交消息是否已经被发送到源设备无关。
    • 6. 发明授权
    • Dynamic JAVA™ class selection and download based on changeable attributes
    • 基于可变属性的动态JAVA(TM)类选择和下载
    • US06279030B1
    • 2001-08-21
    • US09190894
    • 1998-11-12
    • Kathryn H. BrittonStephen GrahamDavid Louis Kaminsky
    • Kathryn H. BrittonStephen GrahamDavid Louis Kaminsky
    • G06F1516
    • G06F9/44521
    • A method, system, and computer-readable code with which a program component can be dynamically selected for downloading, based on current values of one or more changeable attributes. Multiple versions of a program component are available, and a specific version is dynamically selected for downloading based on current attribute values. Attribute values may represent a user's authorization privileges, current working environment, preferences, network connection type, status, etc. In this manner, software can be optimized for particular users or groups of users, or particular environments of hardware and/or software, while still providing applications that are usable by a wide range of users in a wide range of operating environments. In another aspect, this dynamic selection based on attributes can be used to select a version of a component for remote execution, instead of for downloading. The dynamic selection process may occur on a server in the network, or on the client's local machine. In the latter case, selected component versions may be loaded from local storage instead of downloading them from a server. Administrative policy information based on the user's identity and/or group membership may be used to generate the current attribute values, reflecting one or more of: a user's current working environment, authorization privileges, preferences, network connection type, and status.
    • 基于一个或多个可更改属性的当前值,可以动态地选择程序组件以进行下载的方法,系统和计算机可读代码。 可以使用多个版本的程序组件,并根据当前属性值动态选择特定版本进行下载。 属性值可以表示用户的授权权限,当前工作环境,首选项,网络连接类型,状态等。以这种方式,可以为特定用户或用户组或硬件和/或软件的特定环境优化软件,同时 仍然提供可在广泛的操作环境中广泛的用户使用的应用程序。 在另一方面,基于属性的这种动态选择可以用于选择用于远程执行的组件的版本,而不是用于下载。 动态选择过程可能发生在网络中的服务器上或客户端的本地机器上。 在后一种情况下,可以从本地存储装载选择的组件版本,而不是从服务器下载它们。 可以使用基于用户身份和/或组成员身份的管理策略信息来生成当前属性值,其反映以下一个或多个:用户的当前工作环境,授权权限,偏好,网络连接类型和状态。