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Lightning Talk @ GraphConnect Europe26th April 2016
Dirk Mahler, buschmais GbR
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I‘m a Java developer I‘m a human I make mistakes I need fast feedback I use analysis tools in my build chain
They‘re valuable, but…
MavenEnforcer Plugin
PMD
FindBugs
Checkstyle
…
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tunnelvision
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closed set ofrules & metrics
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opinionated rules
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low levelof abstraction
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closeddata models
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(jQAssistant:Tool)-[:USES]->(neo4j:Graph:Database)
http://jqassistant.org
http://neo4j.org
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Scan software structures
Store in a database
Execute queries Explore
Add high level concepts
Find constraint violations
Create Reports
Neo4j
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connectedextensible
natural
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Maven
CREATES
Project
Web
Artifact
Beans
HAS_INTERCEPTOR
Xml
Java
Type
Java
Method
CONTAINS
DECLARES
Maven
Xml
Java
Provided byplugins
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accessible
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(project:Maven:Project)-[:CREATES]->(war:Web:Artifact)
(war)-[:CONTAINS]->(beans:Beans:Xml)
(beans)-[:HAS_INTERCEPTOR]->(type:Java:Type)
(type:Java:Type)-[:DECLARES]->(method:Java:Method)
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multi dimensional
Maven
Repository
CONTAINS_ARTIFACT
Web
Artifact
Java
Type
CONTAINS
CONTAINS_ARTIFACT
Web
Artifact
Java
Type
CONTAINS
HAS_PREDECESSORHAS_PREDECESSOR
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concrete&
abstract
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Type
ClassAnnotation
ANNOTATED_BY
Type
OF_TYPE
Entity
Jpa
MATCH(entity:Type)-[:ANNOTATED_BY]->(annotation),(annotation)-[:OF_TYPE)->(:Type{fqn:"javax.persistence.Entity"})
SETentity:Jpa:Entity
RETURNentity.fqn
Concept
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MATCH(package:Package)-[:CONTAINS]->(entity:Jpa:Entity)
WHEREpackage.name <> "model"
RETURNpackage.fqn, collect(entity.fqn)
Constraint
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MATCH(service:Spring:Service)-[:DEPENDS_ON]->(other:Spring:Type)
WHERE NOTother:Serviceor other:Repository // Controller is disallowed
RETURNservice.fqn as Service, collect(other.fqn) as ForbiddenDeps
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rules = queries
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[[model:JpaEntityInModelPackage]].All JPA entities must be located in packages named "model".[source,cypher,role=constraint,requiresConcepts="jpa2:Entity"]----MATCH(package:Package)-[:CONTAINS]->(entity:Jpa:Entity)
WHEREpackage.name <> "model"
RETURNentity AS EntityInWrongPackage
----
Asciidoc
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documentation = rules
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Holistic and extensible view on code structure and systemarchitecture
Exploration of existing structures
Validation of rules using concepts from architecture & design language
Executable architecture and design specification
