Current workflow languages for web services suffer from poor support for separation of concerns. Aspect-oriented software development is a well-known approach to improve this. In this paper, we present an aspect-oriented extension for the WS-BPEL language that improves on current state-of-the-art by introducing an explicit deployment construct, a richer joinpoint model, and a higher-level pointcut language. In addition, the supporting technology is compatible with existing WS-BPEL engines. Classification. Business process modeling and analysis, processes and service composition

Abstract. In this paper, we present a mechanism to capture and reestablish the state of Java threads. We achieve this by extracting a thread's execution state from the application code that is executing in this thread. This thread serialization mechanism is implemented by instrumenting the original application code at the byte code level, without modifying the Java Virtual Machine. We describe this thread serialization technique in the context of middleware support for mobile agent technology. We present a simple execution model for agents that guarantees correct thread migration semantics when moving an agent to another location. Our thread serialization mechanism is however generally applicable in other domains as well, such as load balancing and checkpointing.

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