GraphConnect Europe 2016 IoT Solutions

1. Java access to Neo4j™ databases at different
levels of abstraction
ˮfocus on your domain model, not on how to map it to a databaseˮ
Issue closed: Database- Design & Mapping
Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net

2. Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net
Domain Queries (formulate queries based on your domain concepts)
Query-DSL (use a 'Native Java DSL' for the CYPHER language)
Generic Graph Model (work with nodes, relations, properties, ...)
Domain Mapping (store / retrieve complex domain models.
You don't write annotations, not even a single line of mapping code)
Database Access (uniformly access remote, embedded, in-memory dbs)
Neo4j
Graph Database
level of
abstraction
high
low
Transactions
Concurrency
(OptimisticLocking)
Non-
Functional
Features

3. Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net

4. Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net
List<Person> domainObjects = createDomainObjects();
Properties props = new Properties();
// properties for remote access
props.setProperty(DBProperties.SERVER_ROOT_URI, "http://localhost:7474");
IDBAccess dbAccess = DBAccessFactory.createDBAccess(DBType.REMOTE, props);
IDomainAccess domainAccess =
DomainAccessFactory.createDomainAccess(dbAccess, “PEOPLE-DOMAIN“);
domainAccess.store(domainObjects);

5. Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net
DomainQuery q = domainAccess.createQuery();
DomainObjectMatch<Person> j_smithMatch = q.createMatch(Person.class);
q.WHERE(j_smithMatch.atttribute("lastName")).EQUALS("Smith");
q.WHERE(j_smithMatch.atttribute("firstName")).EQUALS("John");
DomainObjectMatch<Person> j_smith_residentsMatch =
q.TRAVERSE_FROM(j_smithMatch).FORTH("pointsOfContact")
.BACK("pointsOfContact").TO(Person.class);
DomainQueryResult result = q.execute();
List<Person> j_smith_residents = result.resultOf(j_smith_residentsMatch);

6. Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net
DomainQuery q = domainAccess.createQuery();
DomainObjectMatch<Person> smithMatch = q.createMatch(Person.class);
q.WHERE(smithMatch.atttribute("lastName")).EQUALS("Smith");
DomainObjectMatch<Area> smithAreasMatch =
q.TRAVERSE_FROM(smithMatch).FORTH("pointsOfContact")
.FORTH("area").FORTH("partOf").DISTANCE(0, -1).TO(Area.class);
DomainQueryResult result = q.execute();
List<Person> smithInEurope = result.resultOf(smithInEuropeMatch);
DomainObjectMatch<Area> europeMatch = q.createMatch(Area.class);
q.WHERE(europeMatch.atttribute("name")).EQUALS("Europe");
DomainObjectMatch<Person> smithInEuropeMatch =
q.SELECT_FROM(smithMatch).ELEMENTS(
q.WHERE(smithAreasMatch).CONTAINS(europeMatch));

7. Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net
• New Features still being added on a regular basis.
• Storing Domain Queries with the Domain
Model (upcoming Release)
• New Project JCypher-Server
• A server-side implementation of Jcypher,
providing a RESTFul API
• A WEB-UI to work and experiment with
Domain Models and Domain Queries

8. Thank You !
Wolfgang Schuetzelhofer
Company @: www.iot-solutions.net
Project @: jcypher.iot-solutions.net