L. Liu, C. Pu, and W. Tang. Supporting Internet Applications Beyond Browsing: Trigger Processing and Change Notification. In 5th Intl. Computer Science Conference (ICSC'99). Springer Verlag, December 1999.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....traffic that may turn out to be useless because of the number of polls that return having detected no changes. Polling is also a burden on the computational resources at the server in having to respond to the polls and at the many clients doing the polling. Previous persistent query solutions [LPT99a, LPT99b, LPT00] have used polling to discover changes at information providers, but clearly, this solution is not the most efficient. Assuming that information providers send change notifications to subscribers, the information provider can use several different policies to determine the rate of notification ....

....is left to make the policy decision about when to execute the queries against new content. User proxies lose 34 the ability to execute the query based on their own policies and are left at the will of the provider s administrative authority to enforce a query execution policy. Several systems [FW91, GNOT92, YGM95, LPT99a, LPT99b, LPT99a, LPT00] implement such persistent query functionality. One result of this is that the information provider is ill suited to evaluate the final usefulness of the document to a user s query and broader information need. This is the case even if leaving this final judgment to the provider is ....

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Ling Liu, Carlton Pu, and Wei Tang. Supporting Internet Applications Beyond Browsing: Trigger Processing and Change Notification. In Proceedings of the 5th International Computer Science Conference, Hong Kong, December 1999. Springer Verlag.

....and the parallelization capability at the JC0 server. The second indexing technique is called indexing by trigger pattern. It forms groups of COs by indexing COs on both the source names listed in their trigger expressions and the trigger patterns derived from their trigger expressions. See [13] for more detail. As many factors may affect the choice of each indexing strategy for distributed triggers, in the JC0 system we expect to produce guidance to update monitor implementors as to which strategies will be most effective for optimizing continual queries in which situations. This ....

....returns the result of a polling trigger query, the multithreaded trigger condition tester is invoked to evaluate the rest of the CQ triggers of the same pattern concurrently. Each thread evaluates the filter portion of a trigger expression Tcq. Duc to the space limitation, readers may refer to [13] for further details. 4 Event Notification in JCQ Event notification is a software facility that provides mechanisms for notification of event occurrences. Generally speaking, an Event Notification Service (ENS) protocol has minimum and maximum latency bounds on both event observation and update ....

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Ling Liu, Calton Pu and W. Tang. Supporting Internet Applications Beyond Browsing: Trigger Processing and Change Notification Manuscript, Oregon Graduate Institute, Department of CSE, April 1999.

....sophisticated full text retrieval. NiagaraCQ supports XML QL queries that select subtrees in an XML document. In contrast to such tree based queries, filters in the Hermes application domain typically focus on flat structures like bibliographical references. The Continual Queries Project [15] investigates update monitoring problems. In this project, the Continual Queries (CQ) language was developed, which has been implemented in several prototypes. This language supports a sophisticated and detailed definition of profiles. CQ is a system that could be used as a basis for an alerting ....

L. Liu, C. Pu, and W. Tang. Supporting internet applications beyond browsing: Trigger processing and change notification. In Hui and Lee [13].

....and the parallelization capability at the JCQ server. The second indexing technique is called indexing by trigger pattern. It forms groups of CQs by indexing CQs on both the source names listed in their trigger expressions and the trigger patterns derived from their trigger expressions. See [13] for more detail. As many factors may affect the choice of each indexing strategy for distributed triggers, in the JCQ system we expect to produce guidance to update monitor implementors as to which strategies will be most effective for optimizing continual queries in which situations. This ....

....returns the result of a polling trigger query, the multithreaded trigger condition tester is invoked to evaluate the rest of the CQ triggers of the same pattern concurrently. Each thread evaluates the filter portion of a trigger expression Tcq . Due to the space limitation, readers may refer to [13] for further details. 4 Event Notification in JCQ Event notification is a software facility that provides mechanisms for notification of event occurrences. Generally speaking, an Event Notification Service (ENS) protocol has minimum and maximum latency bounds on both event observation and update ....

[Article contains additional citation context not shown here]

Ling Liu, Calton Pu and W. Tang. Supporting Internet Applications Beyond Browsing: Trigger Processing and Change Notification Manuscript, Oregon Graduate Institute, Department of CSE, April 1999.

No context found.

L. Liu, C. Pu, and W. Tang. Supporting Internet Applications Beyond Browsing: Trigger Processing and Change Notification. In 5th Intl. Computer Science Conference (ICSC'99). Springer Verlag, December 1999.

No context found.

Ling Liu, Calton Pu, Wei Tang, "Supporting Internet Applications beyond Browsing: Trigger Processing and Change Notification (Extended Abstract)", Proc. of 5th Intl' Computer Science Conference -- Internet Applications (ICSC '99), Hong Kong (December 1999.

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Ling Liu, Calton Pu, Wei Tang, "Supporting Internet Applications beyond Browsing: Trigger Processing and Change Notification (Extended Abstract)", Proc. of 5th Intl' Computer Science Conference -- Internet Applications (ICSC '99), Hong Kong (December 1999.

No context found.

L. Liu, C. Pu, and W. Tang. Supporting Internet Applications Beyond Browsing: Trigger Processing and Change Notification. In 5th Intl. Computer Science Conference (ICSC'99). Springer Verlag, December 1999.

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