A flexible and recoverable client/server database event notification system

Hanson, Eric N.; Chen, I.-Cheng; Dastur, Roxana; Engel, Kurt; Ramaswamy, Vijay; Tan, Wenbing; Chun, Xu

doi:10.1007/s007780050051

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…In [HCD98] the described problem (of notifying an external system before the triggering transaction has committed) is called dirty dependent operation problem (short DDO problem). Furthermore, [HCD98] describes a software architecture in which application programs can register at the database for a certain event.…”

Section: Active Dbms and External Systemsmentioning

confidence: 99%

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Automatic Updates of Interactive Information Visualization User Interfaces through Database Triggers

Leissler

Hemmje

Neuhold

2000

Advances in Visual Information Management

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In client-server based interactive infonnation visualization, user interfaces data sets of many types are made accessible by a server. On the server side, these data sets can, e.g., be stored in a file system. As soon as a user requests the data set, it will be transmitted from the server to the requesting client. A different approach is to dynamically construct a data set at request time on the server side for visualization on the client side. Another approach for database driven infonnation visualization is to request actual data out of a running infonnation visualization application on the client side. Both visualization methods have in common that changes in the underlying data cannot be automatically reflected in changes of the client's infonnation visualization state and context. A solution for this problem is the use of database triggers which today are often implemented in existing database management systems (DBMS). Database triggers are a mechanism used to define a set of operations which are to be executed by the DBMS as soon as a given part of the data in the database changes. Using triggers to update an infonnation visualization client has the advantage of eliminating unnecessary database requests. Moreover, the delay in updating the infonnation visualization on the client side is only dependent on the time it takes to send a message from the server to the client. This paper describes a conceptual model for such a trigger mechanism and evaluates some upcoming problems. Furthennore, the paper describes a prototypical proof-of-concept implementation based on commonly used technologies and systems. H. Arisawa et al. (eds.), Advances in Visual Information Management

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Section: Active Dbms and External Systemsmentioning

confidence: 99%

“…Furthermore, [HCD98] describes a software architecture in which application programs can register at the database for a certain event. As soon as the event occurs, the registered application is called.…”

Section: Active Dbms and External Systemsmentioning

confidence: 99%

Automatic Updates of Interactive Information Visualization User Interfaces through Database Triggers

Leissler

Hemmje

Neuhold

2000

Advances in Visual Information Management

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“…TriggerMan uses a discrimination network called an A-TREAT network [Hans96] a variation of the TREAT network [Mira97] for trigger condition testing. In the future, we plan to implement an optimized type of discrimination network called a Gator network in TriggerMan [Hans97b].…”

Section: Trigger Condition Testing Algorithmmentioning

confidence: 99%

Support of Intelligent Integration of Information Using an Asynchronous Trigger Processor

Hanson¹

2000

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