摘要:
An autonomic grid. The autonomic grid can include a multiplicity of hosting services communicatively coupled to one another. Each hosting service can include an administrative service configured to determine whether to deploy requested Web services locally or remotely; a code base for storing implementations of the requested Web services; and, a deployment service configured to deploy on command the implementations stored in the code base. Notably, at least one of the hosting services further can include one or more Web services instances; one or more monitors configured to proxy requests to and responses from the Web services instances; and, one or more agents subscribed to the monitors to analyze the requests to and responses from the Web services instances, and to provision Web services in others of the hosting services based upon the analysis.
摘要:
A self-healing and self-optimizing grid architecture can be provided in accordance with the present invention. Specifically, the architecture can include a mechanism for detecting component failures, and even degraded component performance, within peer components in a hosting service. Once a failure has been detected, the detecting peer to undertake remedial action to recreate and redeploy the component in the hosting system. In particular, the detecting component can acquire the behavior of the failed component and the detecting component can instantiate an instance of the behavior in another server in the grid. Thus, the mechanism described herein can be analogized to biotechnical DNA as every component in the hosting service can maintain an awareness of the state of the entire system and can recreate the entire system through knowledge provided by grid services DNA.
摘要:
Method, apparatus and program products for increasing the performance of communications using differencing data communications over a message queue supporting asynchronous communications from a variety of applications executing on a source device over a shared external communication link to destination devices are provided. A data stream between the source device and the destination device is segmented based on the type of the data stream to provide a logical segmentation which increases the occurrence of repeated transmissions of a segment. The segments are then placed in the message queue as a message for transport to a destination computer. Differencing is provided by replacing the segment with an associated identifier for segments which have previously been transported to provide a reduced volume of data for transmittal based on recognition and replacement of data segments which have previously been transmitted by the source device. The destination device receives the transmitted reduced segments as messages in a receive message queue and reconstructs the data stream. Synchronization between the differencing caches of the devices is not required as the communication is asynchronous through a message queue and, if a reduced segment is not recognized, retransmission of the complete segment instead of the associated identifier may be requested and the source device creates and queues the segment as a message.
摘要:
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.
摘要:
Method, apparatus and program products for increasing the performance of communications of a terminal emulator application resident on a first computer and communicating over an external communication link using a terminal emulator protocol with a host application resident on a second computer remote from the first computer are provided. A protocol interceptor is provided on both the host side and the terminal emulator application side of the external communication link to provide communications over the external communication link using a differenced communication protocol data stream which includes a reduced volume of data for transmittal compared to the corresponding terminal emulator protocol data stream. The reduction in volume in the differenced communication protocol data stream is based on recognition and replacement of data segments which have previously been transmitted by the host application. The terminal emulator protocol data stream from the host application is intercepted and converted to the differenced communication protocol data stream before transmission. The differenced communication protocol data stream is received at the terminal emulator application computer and reconstructed into a terminal emulator protocol data stream which is provided to the terminal emulator application. The continuous terminal emulator protocol data stream may be segmented and calculating an identifier for each segment calculated. If the segment corresponds to a segment saved on a cache present on the receiving computer, the segment is replaced with the identifier for transmission over the external communication line. The saved segment from the cache one the receiving computer is inserted in the data stream in place of the identifier.
摘要:
A method is presented in which federated domains interact within a federated environment. Domains within a federation can initiate federated single-sign-on operations for a user at other federated domains. A point-of-contact server within a domain relies upon a trust proxy within the domain to manage trust relationships between the domain and the federation. Trust proxies interpret assertions from other federated domains as necessary. Trust proxies may have a trust relationship with one or more trust brokers, and a trust proxy may rely upon a trust broker for assistance in interpreting assertions.
摘要:
A method, system, apparatus, or computer program product is presented for routing event messages between data processing systems based on privacy policies associated with the data processing systems and based on event policies associated with event types for the event messages. When a system attempts to publish an event message for a particular type of event or to subscribe to those event messages, an event policy is checked to determine whether the system may publish messages for that type of event or may subscribe to those messages. Moreover, if a publishing system publishes an event message that contains personally identifiable information for a user of a data processing system, and a subscribing system has subscribed to event messages having the same event type, then the privacy policies associated with the systems are compared to determine compatibility or incompatibility between the privacy policies before routing a message between the systems.
摘要:
A technique, system, and computer program for encapsulating socket functionality in a uniform communications object model. This object model is system- and language-independent, and supports both synchronous and asynchronous I/O. Further, the object model functionality is lightweight and modular, enabling its use within devices having limited memory and storage capability. The functionality included in this model is based on the common denominator of functions provided in modem operating systems, which provide the capability for basic sockets support as well as support for threads. Use of this uniform communications object model enables porting an application across environments ranging from resource-constrained devices through servers.
摘要:
A method and apparatus for allowing dynamic applet access to servers from which the applet did not originate wherein an application on the originating server redirects communications between the applet and network resources.
摘要:
A system and method are provided for managing a workflow for a document. An electronic form is created for receiving data pertaining to a workflow. A content integration template locates and exposes data fields in the electronic form. A document workflow defines states of the document, transitions between states, and actions for each state.