Present Status of Metbroker Seishi Ninomiya [email protected] National Agricultural Research Organization 1 7時35分 Solution by Data Broker • Database heterogeneity is a big issue in distributed environments • Data brokers provide consistent access to heterogeneous DBs Heterogeneous DBs Rice Growth Prediction MetBroker A-DB Pesticide Prediction B-DB Farm Management 2 7時35分 Meta Data Heterogeneity is absorbed by brokers (mediators) C-DB D-DB Data Brokers Developed • Meteorological DBs – MetBroker（14DB, >6000 stations） • Map DBs – ChizuBroker（3DB，Japan，NZ，World） • Digital Elevation DBS – DEMBroker（2DB，Japan 50m, World 1Km） • Soil DBs – SoilBroker 3 7時35分 New Architecture of Brokers Clients MetBroker RMI or HTTP with wrapper servelet ChizuBroker DEMBroker Tight linkage based on Java objects WebService-SOAP/XML Resource Server Country Server XML-based Loose linkage 4 7時35分 Field Server linked to MetBroker アプリケーション Client APP W気象 DB DB Weather アプリケーション Client APP 気象 DB Weather DB MetBroker MetBroker アプリケーション Client APP 気象 DB Weather DB 気象 DB FS Weather DB Weather Data XML FS Data Archive Station Conf. XML 5 7時35分 FieldServerDB Interpolation Service WebService Client SOAP over HTTP DEMBroker DEMBroker Interpolation SOAP Interpolation RMI MetBroker SOAP DB DB MetBroker DB 6 7時35分 Thank you for your attention www.agmodel.org www.agmodel.net 7 7時35分
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