VIATRA/DeveloperMeetingMinutes/Meeting20151008

Topics

• EIQ
  • Sirius: https://github.com/FTSRG/iq-sirius-integration/pull/1
  • cyclic linking:
    • https://bugs.eclipse.org/bugs/show_bug.cgi?id=464120
    • https://bugs.eclipse.org/bugs/show_bug.cgi?id=478892 - fixed
  • null pointers:
    • https://bugs.eclipse.org/bugs/show_bug.cgi?id=479214
    • https://bugs.eclipse.org/bugs/show_bug.cgi?id=478894
  • viewers: https://bugs.eclipse.org/bugs/show_bug.cgi?id=478172
  • fixed:
    • https://bugs.eclipse.org/bugs/show_bug.cgi?id=479023
    • https://bugs.eclipse.org/bugs/show_bug.cgi?id=478279
  • LS
    • ticket assignments, missing tickets, measurement results
• CPS demo
  • can we integrate it into the MQTT-CEP demo as well?
• VIATRA CEP
  • https://bugs.eclipse.org/bugs/show_bug.cgi?id=473187

Minutes

EMF-IncQuery

• cyclic linking
  • fix added, lot of effort to check
  • on certain machines for specific projects, a new type of error occurs
  • parameters with type definition not available is problematic
    • in Massif it cannot be fixed since data types cannot be specifically set (EString/String issues)
  • workaround can be to enforce the order of file processing
    • in 1.1, use file name ordering
    • in 1.2, use analysis of cross file dependencies
  • uncovers deeper problems around type inference and scalar types
  • main strategies
    • Enforce type declaration for parameters on all public patterns
    • Extend language with scalar type support with the correct semantics
• NPE in JvmTypeInference
  • not critical, but can be confusing
• NPE in QueryExplorer
  • probably add null check in checkStateChanged
• Viewers
  • Balázs will check the fix provided by Csabi
• UML surrogate query
  • fixed by Dini after some evaluation of the UML metamodel
• EMF-IncQuery Variables view
  • Dini fixed the issue, Balázs will check it
• LS
  • performance measurements
    • Marci is still running the evaluation
    • based on the results, choose an approach for scope checking
  • query backend review
    • need to see how to integrate LS as full alternative
    • no hybrid for now, but should not create problems for later adaptation
  • “post” option seems OK, let’s try going with that
• Sirius
  • Balázs did some measurements
  • create Github wiki page: what should be done in Sirius in order to support EMF-IncQuery as query language
  • make sure all glue code and temporary modifications are kept in one place to easily show the required changes
• EclipseCon lightning talk
  • how could we visualize the behavior of the system
• Bugzilla overview

VIATRA

• CEP question
  • allow access to engine inside action code?
  • for now: NO
  • evaluate needs and consequences
• bugzilla overview
  • check 0.8.0RC issues
• debugger demo planned for meeting on Oct. 22

QueryBackendRegistry review

• local search should be added as available backend
• Local Search still depends on incquery.runtime: https://bugs.eclipse.org/bugs/show_bug.cgi?id=469149
  • IncQueryEngine
  • IncQueryException
  • special emf.types
• in 1.2. make sure a given IncQueryEngine uses a single QueryBackendFactory
  • at engine creation, allow the selection of query backend https://bugs.eclipse.org/bugs/show_bug.cgi?id=466336
• default behavior for Local Search is without base index
• for now, it is not a problem that LS is EMF-specific
• maybe LS should specify multiple backends to separate between EMF-specific and generic