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Process Calculi for Long Running Transactions

Process Calculi for Long Running Transactions. Hern án Melgratti IMT Lucca Joint work with R. Bruni and U. Montanari. Two words about Composition. Two words about Composition. Orchestration Structured Flow. Two words about Composition. Orchestration Structured Flow Link-based Flow.

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Process Calculi for Long Running Transactions

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  1. Process Calculi for Long Running Transactions Hernán Melgratti IMT Lucca Joint work with R. Bruni and U. Montanari Dagstuhl Seminar: Autonomous and Adaptive Web Services

  2. Two words about Composition Dagstuhl Seminar: Autonomous and Adaptive Web Services

  3. Two words about Composition • Orchestration • Structured Flow Dagstuhl Seminar: Autonomous and Adaptive Web Services

  4. Two words about Composition • Orchestration • Structured Flow • Link-based Flow Dagstuhl Seminar: Autonomous and Adaptive Web Services

  5. Two words about Composition • Orchestration • Structured Flow • Link-based Flow Dagstuhl Seminar: Autonomous and Adaptive Web Services

  6. Two words about Composition • Orchestration • Structured Flow • Link-based Flow • Choreography B A C Dagstuhl Seminar: Autonomous and Adaptive Web Services

  7. Two words about Composition • Orchestration • Structured Flow • Link-based Flow • Choreography • Global View A  B B  C C  A B 1 A 2 3 C Dagstuhl Seminar: Autonomous and Adaptive Web Services

  8. Two words about Composition • Orchestration • Structured Flow • Link-based Flow • Choreography • Global View B 1 A 2 3 C Dagstuhl Seminar: Autonomous and Adaptive Web Services

  9. Two words about Composition • Orchestration • Structured Flow • Link-based Flow • Choreography • Global View • Local View  A  C  B  C B 1 A 2  B  A 3 C Dagstuhl Seminar: Autonomous and Adaptive Web Services

  10. Flows & Compensations Transactional Process A3 A2 A1 A5 A4 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  11. Flows & Compensations Transactional Process A3 A2 B3 B2 A1 A5 B1 B5 A4 B4 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  12. Flows & Compensations Transactional Process A3 A2 B3 B2 A1 A5 B1 B5 A4 B4 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  13. PC for Compensable Flows • Structured Activity Compensation (StAc) [BCFGHV02, BF04] • Compensating CSP (cCSP) [BHF04] • Sagas Calculi [BMM05] • BPEL0 [PZZSXH06] Dagstuhl Seminar: Autonomous and Adaptive Web Services

  14. (Basic) cCSP [BHF04] Dagstuhl Seminar: Autonomous and Adaptive Web Services

  15. Trace Semantics cCSP(1) • Each P is associated with a set of traces • set of special events  = { , !, ? } (disjoint from ) • traces p,q,... are -event-terminated sequences of actions in . • A,B,..., trace leading to normal termination • A,B,...,! trace leading to interrupt throw • A,B,...,? trace leading to interrupt yield Dagstuhl Seminar: Autonomous and Adaptive Web Services

  16. Trace Semantics cCSP(2) A1 A2 B1 B2 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  17. Trace Semantics cCSP(2) A1 A2 B1 B2 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  18. Trace Semantics cCSP(2) A1 A2 B1 B2 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  19. Trace Semantics cCSP(2) A1 A2 B1 B2 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  20. Trace Semantics cCSP(2) THROWW A1 A2 B1 B2 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  21. Trace Semantics cCSP(2) THROWW A1 A2 B1 B2 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  22. Trace Semantics cCSP(2) THROWW A1 A2 B1 B2 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  23. Parallel Sagas Dagstuhl Seminar: Autonomous and Adaptive Web Services

  24. Parallel Sagas Dagstuhl Seminar: Autonomous and Adaptive Web Services

  25. Semantics of Parallel Sagas (1) • Activities may succeed or fail Dagstuhl Seminar: Autonomous and Adaptive Web Services

  26. Semantics of Parallel Sagas (1) • Activities may succeed or fail • A Saga under either • Commits • Aborts • Fails Dagstuhl Seminar: Autonomous and Adaptive Web Services

  27. Semantics of Parallel Sagas (2)  and = A1;…;An  S   Ak A1 Aj An Dagstuhl Seminar: Autonomous and Adaptive Web Services

  28. Semantics of Parallel Sagas (2)  and = A1;…;An  S   Ak A1 Aj An  and = A1;…;Ak-1;Bk-1;…;B1  S   Ak A1 Aj An B1 Bj Dagstuhl Seminar: Autonomous and Adaptive Web Services

  29. Semantics of Parallel Sagas (2)  and = A1;…;An  S   Ak A1 Aj An  and = A1;…;Ak-1;Bk-1;…;B1  S   Ak A1 Aj An B1 Bj  and = A1;…;Ak-1;Bk-1;…;Bj+1  S   * Ak A1 Aj An B1 Bj Dagstuhl Seminar: Autonomous and Adaptive Web Services

  30. Semantics of Parallel Sagas (3) B1 Bj Bn B’1 B’j A1 A2 A’1 C1 Ck Cm C’1 C’k C’m A1;(B1;…;Bj-1;B’j-1;…;B’1 | C1;…Cm;C’m;…;C’1);A’1 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  31. Semantics of Parallel Sagas (3) B1 Bj Bn B’1 B’j A1 A2 A’1 C1 Ck Cm C’1 C’k C’m A1;(B1;…;Bj-1;B’j-1;…;B’1 | 0);A’1 A1;(B1;…;Bj-1;B’j-1;…;B’1 | C1;C’1);A’1 … A1;(B1;…;Bj-1;B’j-1;…;B’1 | C1;…Cm;C’m;…;C’1);A’1 Dagstuhl Seminar: Autonomous and Adaptive Web Services

  32. cCSP vs Parallel Sagas Calculus • [ A % A° | B % B° | THROWW ] =traces Dagstuhl Seminar: Autonomous and Adaptive Web Services

  33. cCSP vs Parallel Sagas Calculus • [ A % A° | B % B° | THROWW ] =traces • (A;A°) | (B;B°) naive Sagas Dagstuhl Seminar: Autonomous and Adaptive Web Services

  34. cCSP vs Parallel Sagas Calculus • [ A % A° | B % B° | THROWW ] =traces • (A;A°) | (B;B°) • SKIP  (A;A°)  (B;B°)  (A|B);(A°|B°) naive Sagas cCSP Dagstuhl Seminar: Autonomous and Adaptive Web Services

  35. cCSP vs Parallel Sagas Calculus • [ A % A° | B % B° | THROWW ] =traces • (A;A°) | (B;B°) • SKIP  (A;A°)  (B;B°)  (A|B);(A°|B°) • SKIP  (A;A°)  (B;B°)  (A;A°)|(B;B°) naive Sagas cCSP revised Sagas Dagstuhl Seminar: Autonomous and Adaptive Web Services

  36. cCSP vs Parallel Sagas Calculus • [ A % A° | B % B° | THROWW ] =traces • (A|B) ; (A°|B°) • (A;A°) | (B;B°) • SKIP  (A;A°)  (B;B°)  (A|B);(A°|B°) • SKIP  (A;A°)  (B;B°)  (A;A°)|(B;B°) naïve cCSP naïve Sagas cCSP revised Sagas Dagstuhl Seminar: Autonomous and Adaptive Web Services

  37. No Interruption Interruption  Centralized Compensation Naïve cCSP cCSP    Distributed Compensation Revised Sagas Naïve Sagas cCSP vs Sagas Calculi Dagstuhl Seminar: Autonomous and Adaptive Web Services

  38. Interaction-based transactions (1) • Transactional Pi (t) [BLZ03] • Committed Join (cJoin) [BMM04] • Error handling in Pi [ML04] • Web-Pi [LZ05] • Pik, Pike [CD03] Dagstuhl Seminar: Autonomous and Adaptive Web Services

  39. Interaction-based transactions (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  40. Interaction-based transactions (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  41. Interaction-based transactions (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  42. Interaction-based transactions (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  43. Interaction-based transactions (2) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  44. Transactional Pi (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  45. Transactional Pi (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  46. Transactional Pi (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  47. Transactional Pi (1) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  48. Transactional Pi (2) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  49. Transactional Pi (2) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

  50. Transactional Pi (2) Hotel Client Dagstuhl Seminar: Autonomous and Adaptive Web Services

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