Chapter NOSQL outline

Use Case / Requirements

• Data storage backend

• Domain model

  • Attachment

As a User I should be able to Add/Change/Delete an Attachment

• Relation

As a User I should be able to Add/Delete an Attachment to a Conference

As a User I should be able to Add/Delete an Attachment to a Session

As a User I should be able to SPEAK a Conference

As a User I should be able to ATTEND a Conference

Background

Infinispan

• What is a Key/Value Store

  • Hash key

    • Massive scale DataGrid

    • Map/Reduce

    • Search backed by Lucense Index

• What is the 'Cache'

  • JSR-xxx and how it relates to Infinispan

• How to configure a Cache

  • Local/Remote, Sync/Async replication

• How to use it?

  • What is it good for?

  • Mapping of data

    • Hibernate OGM ?

Neo4J

• What is a Graph DataBase

  • Good for storing relations

    • Ad-hoc relations

  • Fast to query recursive relations

    • Friends friends etc..

  • Search backed by Lucense Index

Implementation

• Infinispan

  • AttachmentRepository JTA EJB backed by Infinispan Cache

  • Cache produced via CDI @Produces

• Neo4J

  • RelationRepository backed by CDI bean

  • GraphDatabaseService produced via CDI @Produces

  • Stores the social graph from Twitter

  • Stores relations between domains

    • A User can attend a Conference

    • A User can speak in a Session

    • An Attachment can be attached to a Conference

Requirement Test Scenarios

Overview

• Store data

• Get data

• Update data

Setup

Domain Attachment

• org.cedj.geekseek.domain.attachment.test.integration

• ShrinkWrap Resolver to fetch external dependencies

• Uses real Infinispan backend

Store

Update

Delete

Domain Relation

• org.cedj.geekseek.domain.relation.test.integration

• ShrinkWrap Resolver to fetch external dependencies

• Rely on the core building blocks of Repository and Identifiable

  • Test Doubles for Identifiables and Repositories

    • SourceObject, Sourcerepository

    • Avoids direct dependencies on the other modules

• Uses real neo4j backend

Store

Delete

Graph