Download Internet Programming Languages: ICCL’98 Workshop Chicago, by Peter Sewell, Pawel T. Wojciechowski, Benjamin C. Pierce PDF

By Peter Sewell, Pawel T. Wojciechowski, Benjamin C. Pierce (auth.), Henri E. Bal, Boumediene Belkhouche, Luca Cardelli (eds.)

This ebook is a suite of articles concerning the impression that the new larger scope and availability of huge region networks is having at the semantics, layout, and implementa tion of programming languages. the net has lengthy supplied a world computing in frastructure yet, for many of its historical past, there has no longer been a lot curiosity in programming languages adapted in particular to that infrastructure. extra lately, the internet has professional duced a common curiosity in worldwide assets and, thus, in international professional grammability. it really is now ordinary to debate how courses will be made to run successfully and securely over the net. the web has already revolutionized the distribution and entry of knowledge, and is within the technique of remodeling trade and different components of primary significance. within the box of programming languages, the net is having a deep revitalizing impression, through not easy many primary assumptions and requiring the advance of recent suggestions, programming constructs, implementation strategies, and functions. This booklet is a picture of present study during this energetic quarter. The articles during this publication have been provided on the Workshop on net Programming Lan guages, which was once hung on might thirteen, 1998 at Loyola collage, Chicago, united states. The pa pers submitted to the workshop have been screened through the editors. After the workshop, the provided papers have been refereed via an exterior reviewer and one of many editors, leading to the present selection.

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Additional info for Internet Programming Languages: ICCL’98 Workshop Chicago, IL, USA, May 13, 1998 Proceedings

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Q≡P Γ, P −→Γ , P P ≡ Q Γ, Q−→Γ , Q (Γ, a → s), P −→(Γ, a → s ), P Γ, new a@s in P −→Γ , new a@s in P 6 and Γ, P −→Γ , P Γ, P | Q−→Γ , P | Q Γ, P −→Γ , P c ∈ dom(Γ) Γ, new c in P −→Γ , new c in P Discussion We conclude by discussing alternative approaches for the description of mobile agent infrastructures, related distributed process calculi, implementation, and future work. 1 Infrastructure Description In this paper we have identified two levels of abstraction, precisely formulated them as process calculi, and argued that distributed infrastructure algorithms for mobile agents can usefully be expressed as translations between the calculi.

The manager then sends another Forward message to P1 to bypass the failed proxy. Therefore the state pointer can survive crashes of sites that do not possess it. State loss detection. The third improvement is to add an inquiry protocol that determines when the state pointer is definitely lost. This loss can happen in two ways: – The state pointer is at proxy P and P’s site crashes. – The state pointer has been sent over the network in a Put message and the message is lost because of a site failure (of the sender or the receiver).

No additional network operations are needed. A Lightweight Reliable Object Migration Protocol 37 Mc Thread T A A Pc1 Pc2 Class Class State1 Site 1 Site 2 Fig. 7. The object is invoked remotely (2) Mc Thread T A A Pc1 Pc2 Class Class State1 State2 Site 1 Site 2 Fig. 8. The object is invoked remotely (3) Figure 8 shows what happens after the state pointer is transferred to Site 2. The new state, State2, is created on Site 2 and will contain the updated object state after the method finishes. The old state, State1, may continue to exist on Site 1 but the state pointer no longer points to it.

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