Download A Process Algebraic Approach to Software Architecture Design by Alessandro Aldini PDF

By Alessandro Aldini

Concurrency concept, software program structure, method modeling and verification, and dependability and function overview could appear unrelated disciplines, yet actually they're deeply intertwined and may join an built-in view that allows you to effectively deal with the expanding complexity of software program structures today.

This ebook introduces a method algebraic method of software program structure layout. technique algebra, initially conceived for reasoning concerning the semantics of concurrent courses, offers a foundational foundation for the modeling and verification of useful and nonfunctional points of speaking concurrent platforms. this is exploited on the software program structure point of layout to enhance the formality of layout files and make attainable the research of process houses on the early layout stages.

The first a part of the e-book deals an outline of the ideas and result of method algebra concept supplying heritage fabric at the syntax and semantics for approach calculi in addition to at the bisimulation, trying out, and hint techniques to the definition of behavioral equivalences for nondeterministic, deterministically timed, and stochastically timed processes.

Part supplies directions for a principled transformation of procedure algebra into an architectural description language, ahead of demonstrating tips on how to use approach algebraic thoughts to handle the detection of architecture-level mismatches, performance-driven choice between replacement designs, and the success of a tradeoff among dependability gains and function indices.

Graduate scholars and software program pros, will discover a method Algebraic method of software program structure layout an invaluable addition to their bookshelf.

Show description

By Alessandro Aldini

Concurrency concept, software program structure, method modeling and verification, and dependability and function overview could appear unrelated disciplines, yet actually they're deeply intertwined and may join an built-in view that allows you to effectively deal with the expanding complexity of software program structures today.

This ebook introduces a method algebraic method of software program structure layout. technique algebra, initially conceived for reasoning concerning the semantics of concurrent courses, offers a foundational foundation for the modeling and verification of useful and nonfunctional points of speaking concurrent platforms. this is exploited on the software program structure point of layout to enhance the formality of layout files and make attainable the research of process houses on the early layout stages.

The first a part of the e-book deals an outline of the ideas and result of method algebra concept supplying heritage fabric at the syntax and semantics for approach calculi in addition to at the bisimulation, trying out, and hint techniques to the definition of behavioral equivalences for nondeterministic, deterministically timed, and stochastically timed processes.

Part supplies directions for a principled transformation of procedure algebra into an architectural description language, ahead of demonstrating tips on how to use approach algebraic thoughts to handle the detection of architecture-level mismatches, performance-driven choice between replacement designs, and the success of a tradeoff among dependability gains and function indices.

Graduate scholars and software program pros, will discover a method Algebraic method of software program structure layout an invaluable addition to their bookshelf.

Show description

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Additional info for A Process Algebraic Approach to Software Architecture Design

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We define P1 ≈Tr P2 iff P1 {Qi → Xi | 1 ≤ i ≤ k} ≈Tr P2 {Qi → Xi | 1 ≤ i ≤ k} for all Q1 , . . , Qk ∈ P. 16. Let P1 , P2 ∈ PL be guarded process terms containing free occurrences of k ∈ N process variables X1 , . . , Xk ∈ Var at most. Whenever P1 ≈Tr P2 , then rec X : P1 ≈Tr rec X : P2 for all X ∈ Var. 5. 4. XT,5 T,8 T While axiom XTr,6 states that ≈Tr is able to abstract from any τ -action, axiom XTr,5 states that ≈Tr does not respect at all the branching structure of process terms. As an example, for b = d we have: a b P a d a ~ ~/ T ~ ~ Tr Q b P d Q As can be noted, ≈Tr permits to postpone all choices whose branches start with the same action.

Its satisfaction relation |=Tr is thus defined as |=B when restricted to its formulas. 5 Equational laws for ≈Tr (XTr,1 ) (XTr,2 ) (XTr,3 ) P1 + P2 = P2 + P1 (P1 + P2 ) + P3 = P1 + (P2 + P3 ) P+0 = P (XTr,4 ) P+P = P (XTr,5 ) (XTr,6 ) (XTr,7 ) a . P1 + a . P2 = a . P = P ∑ ai . Qj = j∈J ∑ ak . Pk + + (XTr,8 ) (XTr,9 ) (XTr,10 ) ∑ ai . Qj = j∈J 0 S S k∈I,ak ∈S / ∑ bh . ∑ ai . Qj j∈J S i∈I ∑ ak . (Pk k∈I,ak ∈S h∈J,bh =ak Qh S Qh ) ∑ ak . Pk k∈I,ak ∈S / ∑ bh . Qh h∈J,bh ∈S / 0 = 0 (XTr,11 ) (XTr,12 ) (XTr,13 ) (XTr,14 ) 0/H (a .

Qk ∈ P. 16. Let P1 , P2 ∈ PL be guarded process terms containing free occurrences of k ∈ N process variables X1 , . . , Xk ∈ Var at most. Whenever P1 ≈Tr P2 , then rec X : P1 ≈Tr rec X : P2 for all X ∈ Var. 5. 4. XT,5 T,8 T While axiom XTr,6 states that ≈Tr is able to abstract from any τ -action, axiom XTr,5 states that ≈Tr does not respect at all the branching structure of process terms. As an example, for b = d we have: a b P a d a ~ ~/ T ~ ~ Tr Q b P d Q As can be noted, ≈Tr permits to postpone all choices whose branches start with the same action.

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