Mobile code has often been mentioned as an attractive technol- ogy for distributing computations inside a Grid consisting of heterogeneous nodes interconnected by a large-scale network. We describe here a Java-based mobile agent model for a Grid infrastructure which addresses issues such as customizable distribution of computation, security, billing and accounting.

The purpose of this paper is to investigate how several innovative techniques, not all initially intended for fault-tolerance, can be applied in providing fault tolerance of complex mobile agent systems.

Abstract. Safe programming languages offer safety and security features making them attractive for developing extensible environments on a wide variety of platforms, ranging from large servers all the way down to hand-held devices.Extensible environments facilitate dynamic hosting of a variety of potentially untrusted codes.This requires mechanisms to guarantee isolation among hosted applications and to control their usage of resources.While most safe languages provide certain isolation properties, typically resource management is difficult with the current standard APIs and existing virtual machines. This one-day workshop brought together practitioners and researchers working on various approaches to these problems to share ideas and experience. 1 Workshop Overview The workshop consisted of four 90-minute sessions. In the first one Doug Lea from State University of New York in Oswego delivered an invited talk on the Application Isolation API proposed as an extension to the Java TM programming language [1]. Presentations of accepted position papers were given in the next two sessions. Each author had 7 minutes to present the main idea of his/her work. After all of the authors in a given session finished, the presentations were discussed- this include the time for questions about specific presentations as well as general remarks and brain-storming. The last session was a panel discussion, during which the workshop attendants listed a list of open or “really difficult ” issues in the discussed domain. The total of nine presentations were accepted for the workshop, and each of them was presented. About 25 people attended the workshop, the majority from Europe, with a few attendees from the US. Most of the participants were from the academia. 2 Position Paper Summaries All the papers accepted and presented are available from

Abstract. Safe programming languages offer safety and security features making them attractive for developing extensible environments on a wide variety of platforms, ranging from large servers all the way down to hand-held devices.Extensible environments facilitate dynamic hosting of a variety of potentially untrusted codes.This requires mechanisms to guarantee isolation among hosted applications and to control their usage of resources.While most safe languages provide certain isolation properties, typically resource management is difficult with the current standard APIs and existing virtual machines. This one-day workshop brought together practitioners and researchers working on various approaches to these problems to share ideas and experience. 1 Workshop Overview The workshop consisted of four 90-minute sessions. In the first one Doug Lea from State University of New York in Oswego delivered an invited talk on the Application Isolation API proposed as an extension to the Java TM programming language [1]. Presentations of accepted position papers were given in the next two sessions. Each author had 7 minutes to present the main idea of his/her work. After all of the authors in a given session finished, the presentations were discussed- this include the time for questions about specific presentations as well as general remarks and brain-storming. The last session was a panel discussion, during which the workshop attendants listed a list of open or “really difficult ” issues in the discussed domain. The total of nine presentations were accepted for the workshop, and each of them was presented. About 25 people attended the workshop, the majority from Europe, with a few attendees from the US. Most of the participants were from the academia. 2 Position Paper Summaries All the papers accepted and presented are available from