BPEL processes
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Verification and transformation of
description
Verification and transformation of. BPEL processes. Agenda. BPEL Transformation QUT Ouyang c.s. HUStahl c.s. VVBisgaard Lassen c.s. Verification Soundness Operational guideline Conclusions. BPEL – Basic activities. invoke reply receive empty assign wait throw compensate - PowerPoint PPT Presentation
Transcript of BPEL processes
Verification and transformation of
BPELTransformation
QUT Ouyang c.s. HU Stahl c.s. VV Bisgaard Lassen c.s.
Verification Soundness Operational guideline
Conclusions
invoke reply receiveemptyassignwait throwcompensate terminate
sequenceswitchpickwhileflow
links transition condition join condition dead path elimination
variablesevent handlers fault handlerscompensation handler
process
flow
switch
left! right!
exec?
exec?
start?
sequence
sequence
empty
If, during the performance of structured activity S, the semantics of S dictate that activity X nested within S will not be performed as part of the behavior of S, then the status of all outgoing links from X is set to negative.
If during the execution of a business process instance, two or more receive activities for the same partner link, portType, operation and correlation set(s) are in fact simultaneously enabled, then the standard fault bpws:conflictingReceive MUST be thrown by a compliant implementation.
Positive path Negative path Synchronous faults
(not shown)
Positive path Communication
place Asynchronous
faults
Join condition Negative path
(not shown)
Outgoing links
Negative paths
Outgoing links
TRANSFORMATION
QUT HU
VERIFICATION
Soundness State spaces Conflicting receives?
Patterns Library Extensions
TRANSFORMATION
VV
Semantics? Complexity▪ Event handlers▪ Fault handlers▪ Compensation handlers
Pragmatic approachBPEL 2.0?
Tons of issues
