EntwicklerCamp 2016 Edition

1. Where is my data?
Implementing GraphDB capabilities
in XPages
Oliver Busse
We4IT GmbH, Germany
April 13, 2016

2. Oliver Busse
• „Bleeding Yellow“ since R4.5
• Software Architect at We4IT
• Member of the development team of
Aveedo® Application Framework
• IBM Champion for ICS in 2015 + 2016
• OpenNTF Member Director
• XPages Advocate
• IBM Bluemix curious
@zeromancer1972
www.oliverbusse.com

3. „Graphs“
http://whatis.techtarget.com/definition/graph-database

4. Graph DB
A graph database, also called a graph-oriented database, is a type of NoSQL database
that uses graph theory to store, map and query relationships.
A graph database is essentially a collection of nodes and edges. Each node represents
an entity (such as a person or business) and each edge represents a connection or
relationship between two nodes.
http://whatis.techtarget.com/definition/graph-database

5. Some Graph DBs & Frameworks
• Neo4J
• OrientDB
• DEX
• Tinkerpop
• Apache Lucene / Solr

6. Who is using Graph DBs?
• Amazon
• Google
• Facebook
• …almost every application that offers something like
• „related posts“ (blogs)
• „others also bought this“ (shops)
• collect relations and „likes“
• …

7. Graphs – terminology
• Vertices (Nodes)
• Properties (Key-Value pairs)
• Edges
• Connections, Relations between Vertices
• ElementStores
• for us: NSF databases
• MetaverseIDs
• Replica + UNID (hashed)
• internal use only (don‘t care about them)

8. Graph DB – in Domino?
• Vertices and Edges are stored as Documents
• The data container is a NSF
• The ElementStore defines the filepath to the NSF
• An ElementStore can hold different types of Vertices
• Usually you create one ElementStore for each Vertice type

9. Data Modelling & Implementation
• Nodes are defined as Interfaces
• Fields are defined as properties with Getter and Setter
• Methods define how the Node can build Edges to other Vertices
• Methods also return all Edges to a certain Vertice

10. Init the Graph
• Define the Element Store(s)
• Add Element Store(s) to the Graph Configuration
• Define the DFramedTransactionalGraph object with the Graph
Configuration
• Work with the Graph object

11. Create an Edge
• Parameterize Object 1
• Get Object 2 by a unique key
• Call one of the „add“ methods of your Node class
• Commit your changes

12. Let‘s see the demo &
some code

13. Resources
• The XPages demo application
• https://bitbucket.org/zeromancer1972/sutol-2015-oda-graph-demo
• http://notesx.net:8090/obusse/ec16
• A nice glossary
• http://www.intec.co.uk/from-xpages-to-web-app-glossary/
• OpenNTF Domino API
• http://www.openntf.org/main.nsf/project.xsp?r=project/OpenNTF%20Domino%20API
• http://www.openntf.org/main.nsf/project.xsp?r=project/OpenNTF%20Domino%20API%20Demo%20Database
• Xots
• http://www.intec.co.uk/xots-background-and-multithreaded-tasks-the-openntf-domino-api-way-part-one/
• http://www.intec.co.uk/xots-background-and-multithreaded-tasks-the-openntf-domino-api-way-part-two/
• http://www.intec.co.uk/xots-background-and-multithreaded-tasks-the-openntf-domino-api-way-part-three/
• Graphs
• http://de.slideshare.net/ktree19/the-graph-revolution

14. Q & A