emf-incquery 0.7 presentation for itemis
Post on 25-May-2015
1.032 Views
Preview:
DESCRIPTION
TRANSCRIPT
Budapest University of Technology and EconomicsFault Tolerant Systems Research Group
IncQuery Labs Ltd.
EMF-‐INCQUERY:Efficient Model Queries for
EMF Tools
Tamás Szabó, István Ráth
Overview§ IntroducAon§ EMF-‐INCQUERY overview§ Performance benchmarking§ Roadmap and ideas for the future
A key problem of MDE§ Scalability vs. modeling tools
o Issues encountered by several industrial partners using tools based on the Eclipse Modeling Framework (EMF)
o Modeling scenarios can get really complex really quickly• Instance models of size 1-‐2M and beyond• Performance issues with model transformaLons and code generators have an adverse effect on everyday development tasks
§ Scalability?o Complex(meta)models
o Large instance modelso Complex query and manipulaLon scenarios
Recognized e.g. by AUTOSAR tool vendorshOp://wiki.eclipse.org/Auto_IWG_WP2
Focus: model queries§ Model queries:
“a piece of code that retrieves a given set of the model”§ Queries are at the heart of MDE
o Every model access/read is a (simple) queryo More complex: Views, content providerso Most complex: Model transformaAons, code generators, …
§ Query performance (= the speed of content retrieval) is crucialo First vs. consecuAve vs. throughputo Query result vs. query contents
§ Core problems1. Slow query engines 2. Considerable programming effort necessary to get complex
queries right
EMF-‐INCQUERY
EMF-‐INCQUERY Overview§ A model query engine for batch and live queries
Language• Expressive graph paOern-‐based query language• Focus on reusability: query libraries, recursive paOern calls
ExecuAon• IncrementalevaluaAon based on the Rete algorithm• Instantaneous response for complex queries over large models
Tools• On-‐the-‐fly well-‐formedness validaAon• Incremental model processing (synchronizaAon, ...)• View maintenance• ...
§ Originso 10+ years of R&D experience in model queries & transformaAons
Benefits of EMF-‐INCQUERY
§ Makes on-‐the-‐fly well-‐formedness validaAon, view maintenance, … feasible over really large instance models
§ Simplifies wriAng really complex querieso Graph paOern languageo Highly reusable à query libraries
§ Easy-‐to-‐integrate into exisAng appsoWorks with any EMF domain metamodelo Integrates through Eclipse standards à works with many EMF-‐based apps out-‐of-‐the-‐box
Query engine
Rete network
Input
Intermedia
Output Change
EMF instance
PaOern matcher
Input = Model contents + EMF noAficaAons
Output = Query results + Query result deltas(con<nuously updated as the model changes)
EMF-‐INCQUERY Base
Architecture
Query engine
Rete network
Input
Intermedia
Output Change
EMF instance
PaOern matcher
Input = Model contents + EMF noAficaAons
Output = Query results + Query result deltas(con<nuously updated as the model changes)
EMF-‐INCQUERY Base
Architecture
Model ModificaAon
IncQuery Base Indexers§ Stand-‐alone core library with minimal dependencies§ Provides high performance indexers
o Typeàall instanceso EdgeàSource,Targeto NodeàIncoming/Outgoing edgeso AUribute valueàhost
§ Supports Incremental TransiLve Closureo Efficiently compute & maintain reachability regions along EReference
navigaLon paths§ Indexer iniLalizaLon
o According to visitor strategyo Can be
• Generic (all known Ecore types are indexed) [“wildcard mode”] • Or filtered according to a set of types [memory opLmizaLon for generated query code]
DEMO§ School metamodel in EMF
INCQUERY PaOern Language
INCQUERY PaOern Language
INCQUERY PaOern Language
Expressive declaraAve query language by graph paOerns
Capture local + global queriesComposiAonality + Reusabilility Recursion, NegaAon
Feature highlights§ State-‐of-‐the-‐art development tools based on Xtext2
o Content assist (code compleAon), validaAon, outline, …o Advanced (syntacAc and semanAc) validaAon
§ Unique query language featureso Recursive queries and transiAve closureo Inference-‐supported type system and expressions based on Xbase and Ecoreo PaOern composiAon and reuse
§ RunLmeo Build and execute queries on-‐the-‐flyo Strong generaAve bindings to Java
§ Extension APIso Query-‐based derived features with noAficaAonso ValidaAon Engine for efficient on-‐the-‐fly validaAono Event-‐driven Virtual Machine for transformaAons
INCQUERY Development Tools
INCQUERY Development Tools
Query Explorer
PaOern Editor
INCQUERY Development Tools
Query Explorer
PaOern Editor
INCQUERY Development Tools
Query Explorer
PaOern Editor
Queries are applied & updates on-‐the-‐fly
• Works with most EMF-‐based editors out-‐of-‐the-‐box
• Reveals matches as selecAon
IntegraAon opAons§ IncQuery Java API
o Generic (on-‐the-‐fly queries)o Generated code (opLmized for performance)
§ Query-‐based derived featureso Edges and aUribute values computed and maintained by IncQuery
o Transparent integraLon through genmodeled EMFo Unique feature: Efficient and automated noLficaLon support
§ Add-‐on APIso IncQuery ValidaLon (Demo)o IncQuery Databinding
IncQuery Databinding
JFace Databinding
Model
QueryMatch Set
Match
Query
2. ChangeNoAficaAon
3.a ResultUpdate
3.b Match(Property)Update
4.a Add/Remove items(list, table, tree…)
4.b Update Items(list, table, tree item, label, …)
1. Model ModificaAon
UI Component
Work in progress: IncQuery Viewers
Work in progress: IncQuery Viewers
1. Define “edges” and “nodes” of an overlay graph as
queries
Work in progress: IncQuery Viewers
1. Define “edges” and “nodes” of an overlay graph as
queries
2. Create automaAcally updaAng JFace
viewers (List, Tree, Table, Zest Graph) without manual
coding
PERFORMANCE BENCHMARK
Instantaneous result retrieval?
Benchmarking scenario§ In-‐memory models
o Embedded railways control sodware system design domain (complex queries)
o Instance models up to 2.7M EObjects and 11.1M EReferences
§ Scenario: model transformaLon combined with well-‐formedness validaLono Batch: loading models + execuLng querieso On-‐the-‐fly: transforming models + re-‐execuLng queries instantaneously
§ Toolso Eclipse tools (OCL, OCL Impact Analyzer, INCQUERY, EMF-‐Java manually opLmized)
o Neo4j in-‐memory graph database (for comparison)
Batch operaAons
Batch operaAons
Neo4j scales somewhat beOer than top EMF
tools
… unless you augment EMF with INCQUERY
Batch operaAons
Neo4j scales somewhat beOer than top EMF
tools
… unless you augment EMF with INCQUERY
Note the logarithmic scales: 7x faster!
Real strength: on-‐the-‐fly model processing
Real strength: on-‐the-‐fly model processing
• IncQuery provides near zero response Ames for up to 14M elements
Real strength: on-‐the-‐fly model processing
• IncQuery provides near zero response Ames for up to 14M elements
CharacterisAc difference
Memory usage§ Depends on “query complexity” and model size/contents
§ For typical query/model combinaAons, memory overhead is linearo (1.1-‐2) x (heap required for the model itself)o IncQuery’s built-‐in semanAc validators and the Rete Visualizer aid you in resolving problemaAc query/model combinaAons
APPLICATIONS AND ROADMAP
Known applicaAons§ Well-‐formedness validaAon of very large, industrial AUTOSAR models (AutomoAve OEM)
§ Incremental dependency analysis over sotware infrastructure graphs (tool used in CERN)
§ Queries, views and transformaAons for model-‐driven tool development in the avionics domain (aircrat manufacturer)
§ Model-‐driven refactoring of large source code models (CollaboraAve naAonal project in Hungary)
Development agenda§ Our current plan
o IncQuery Viewerso Dynamic EMF supporto Xcore integraAon (query-‐based derived features)o Query performance opAmizaAono Improve support for stereotyped UML models
§ ARTop/Sphinx integraAono Incremental validaAon using “hybrid queries”• Support parAally materialized models
Other ideas on the table§ ParLal support for OCL§ Dedicated support for Complex Event Processing over live EMF modelso hUp://incquery.net/incquery/demos/jnecto Think incremental queries over the E4 Modeled UI…
§ Develop a high performance and pragmaLc model transformaLon engineo Build the language on Xbase and IQPLo …and the runLme on IncQuery
§ Design space exploraLono OpLmize instance models towards a complex design goal
Final points§ EMF-‐INCQUERY has been successfully migrated to Eclipse.org hUp://eclipse.org/incquery
§ EMF-‐INCQUERY 0.7 milestone builds are available immediately from the Marketplaceo Blog and other resources: hOp://incquery.net o Lots of documentaAon: examples, demos, tutorials
§ Release 0.7 is tentaAvely scheduled shortly ater the Eclipse Kepler Launch (beginning of July)
§ Your contribu<ons (feedback, forum posts, ideas, bugzillas, patches) are very welcome!
Acknowledgements§ IncQuery Development Team
o Gábor Bergmann, Ábel Hegedüs, Ákos Horváth, András Ökrös, Zoltán Ujhelyi, István Ráth
§ AddiLonal contributorso Márk CzoUer, Tamás Szabó
§ Performance benchmarkingo Benedek Izsó, Zoltán Szatmári
§ TesLng, exampleso Asla Csicsely, Tamás Csurgó, Dániel Kávássy, Gábor Szárnyas, Tamás Tóth, Ádám Dudás, Oszkár Semeráth, Zoltán Balogh
§ IncQuery Project Lead: István Ráth§ Senior advisor: Dániel Varró
top related