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The Computer Journal 2002 45(6):595-607; doi:10.1093/comjnl/45.6.595
© 2002 by British Computer Society
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Java for On-line Distributed Monitoring of Heterogeneous Systems and Services

Paolo Bellavista1, Antonio Corradi1 and Cesare Stefanelli2

1 Dipartimento di Elettronica, Informatica e Sistemistica, Università di Bologna, Viale Risorgimento, 2, Bologna, Italy Email: pbellavista@deis.unibo.it 2 Dipartimento di Ingegneria, Università di Ferrara, Via Saragat, 1, Ferrara, Italy

The control and management of Web-based service quality require the extension of the Internet infrastructure with monitoring functions to ascertain dynamically the state of networked resources. We describe the design and implementation of the Monitoring Application Programming Interface (MAPI), a Java-based tool for the on-line monitoring of Internet heterogeneous resources, which provides monitoring indicators at different levels of abstraction. At the application level, it instruments the Java Virtual Machine (JVM) to notify several different types of events triggered during the execution of Java applications, e.g. object allocation and method calls. At the kernel level, MAPI inspects system-specific information generally hidden by the JVM, e.g. CPU usage and incoming network packets, by integrating with Simple Network Management Protocol agents and platform-dependent monitoring modules. MAPI is the core part of a portable tool for distributed monitoring, control and management in the Internet environment. The tool is implemented in terms of mobile agents that move close to the monitored resources to enforce distributed management policies autonomously, with a significant reduction in both reaction time and traffic overhead.

Received 1 November, 2001. Revised 22 April, 2002.


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