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Mole is one of the first Java-based mobile agent systems. It runs on
an unmodified Java virtual machine on PCs under Windows 95/NT and on
Workstations under several UNIX dialects. Earlier versions of Mole
have provided a basic infrastructure for communication and migration
of mobile agents. Version of Mole has been strongly revised and
several requests and proposals from users of the earlier ver sions
of Mole were integrated into the new release. In particular Mole
supports communication between agent groups and concept of sessions.
The infrastructure of Mole includes a resource manager, a direc tory
service and a global naming scheme for agents. In order to support
the design of agents, a graphical agent monitor allows to visualize
the system behaviour as a whole or of a single agent in particular.
Mole further provides a thread management unit to overcome some
shortcomings of the Java virtual machine. Mole provides a simple
means for installation and configuration of the system. This paper
describes the architecture and infrastructure provided by Version
3.0 of Mole.
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