GraphDb in XPages

Apr 13, 2016Download as PPTX, PDF0 likes792 views

This document discusses implementing graph database capabilities in XPages. It begins with introductions of the presenter Oliver Busse and an overview of graph databases. It then discusses some graph database products and frameworks as well as companies using graph databases. Key terminology for graphs like vertices, properties, and edges is defined. The document explains how graphs could be implemented in Domino using documents to store vertices and edges and outlines the data modeling and initialization process. Code examples and a demo application are referenced for further information.

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

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

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

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

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

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“
• …

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)

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

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

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

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

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

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