Podpora distribuirani simulaciji z mobilnimi agenti in XML

This paper presents the use of mobile agents and XML for the connection of simulation models and data resources over a communication network. We have developed two types of agents: a mobile agent that functions as a mobile server for on-demand queries in SQL and transformation of results into XML compliant documents and a stationary agent functioning as a client for query forwarding and conversion of resulting XML documents into CSV files. We have established that software agents can be used to connect distributed simulation models, developed with different general purpose simulation tools and databases, thus improving the connectivity and usability of simulation models in distributed information systems. Keywords: software agents, Java, XML, middleware, distributed simulationV članku je predstavljena uporaba programskih agentov in XML za povezovanje simulacijskih modelov in podatkovnih virov preko komunikacijskega omrežja. Razviti in preizkušeni sta dve vrsti programskih agentov: mobilni agent, ki deluje kot mobilni strežnik za izvajanje poizvedb v SQL (Structured Query Language) in pretvorbo rezultatov v XML (eXtensible Markup Language) format in stacionarni agent, ki deluje kot odjemalec za posredovanje poizvedb in pretvorbo podatkov iz XML formata v CSV (Comma Separated Values) datoteke. V raziskavi smo ugotovili, da je s programskimi agenti možno povezati različne geografsko ločene simulacijske modele in podatkovne baze in tako izboljšati povezljivost in uporabnost različnih simulacijskih modelov v distribuiranih informacijskih sistemih. Ključne besede: programski agenti, Java, XML, middleware, distribuirana simulacij