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

• NoSQL Chapter = TX Test, verify Infinispan is connected to JTA

  • See desc below

• https://github.com/arquillian/continuous-enterprise-development/commit/4d8366c90ee9e97444dee60d8c362ead1147ec97

Overview

• Store data

• Get data

• Update data

Setup

Domain Attachment

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

  • AttachmentRepositoryTestCase simple crud operations against Live Infinispan backend

@Inject
private Repository<Attachment> repository;

@Test
public void shouldBeAbleToCreateAttachment() throws Exception { .. }

@Test
public void shouldBeAbleToUpdateAttachmnt() throws Exception { .. }

@Test
public void shouldBeAbleToRemoveAttachmnt() throws Exception { .. }

• ShrinkWrap Resolver to fetch external dependencies

  • Fetching Infinispan version defined in module pom.

    • Could define version to test against a new/other version of infinispan etc.. source file

public static File[] resolveDependencies() {
    return Maven.resolver().loadPomFromFile("pom.xml")
        .resolve(
            "org.infinispan:infinispan-core")
        .withTransitivity()
        .asFile();
}

• Uses real Infinispan backend

  • Local embedded

• TransactionalBehaviorTest

• BaseTransactionalSpecification

  • Use of base class to define the transactional behavior 'imposed' by the Repository interface

    • Used by All Repository implementations, Interface test

  • Verify connected to JTA

  • Use of transactional wrapped callables

  • Injection of UserTransaction

    @Test
    public void shouldSetUpdatedDate() throws Exception { .. }

    @Test
    public void shouldUpdateObjectOnCommit() throws Exception { .. }

    @Test
    public void shouldRemoveObjectOnCommmit() throws Exception { .. }

    @Test
    public void shouldNotStoreObjectOnRollback() throws Exception { .. }

    @Test
    public void shouldNotUpdateObjectOnRollback() throws Exception { .. }

    @Test
    public void shouldNotRemoveObjectOnRollback() throws Exception { .. }

    @Test
    public void shouldSetCreatedDate() throws Exception { .. }

    @Test
    public void shouldSetUpdatedDate() throws Exception { .. }

• UNIT: Verify Attachment Domain Object

  • Checks created/updated object date rules

  • Checks null field values

  • Rely on base Specification test case TimestampableSpecification

    • AttachmentValidationTestCase

    @Test(expected = IllegalArgumentException.class)
    public void shouldNotAllowNullConstructorTitle() throws Exception {
        new Attachment(null, "", new URL("http://geekseek.org"));
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldNotAllowNullConstructorMimeType() throws Exception {
        new Attachment("", null, new URL("http://geekseek.org"));
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldNotAllowNullConstructorUrl() throws Exception {
        new Attachment("", "", null);
    }

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, but rely on them runtime

• Uses real neo4j backend

• RelationRepositoryTestCase

    @Test @InSequence(0)
    public void shouldBeAbleToCreateRelation() { .. }

    @Test @InSequence(1)
    public void shouldBeAbleToFindTargetedRelations(Repository<TargetObject> targetRepo, Repository<SourceObject> sourceRepo) { .. }

    @Test @InSequence(2)
    public void shouldBeAbleToDeleteRelations() { .. }

    @Test @InSequence(3)
    public void shouldOnlyFindGivenRelation() { .. }

Store

Delete

Graph