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Neo4j Cookbook

By : Ankur Goel

3 (3)

Neo4j Cookbook

3 (3)

By: Ankur Goel

Overview of this book

If you are already using Neo4j in your application and want to learn more about data analysis or database graphs, this is the book for you. This book also caters for your needs if you are looking to migrate your existing application to Neo4j in the future. We assume that you are already familiar with any general purpose programming language and have some familiarity with Neo4j.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Sections

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started with Neo4j

1. Getting Started with Neo4j

Introduction

Single node installation of Neo4j over Linux

Single node installation of Neo4j over Windows

Single node installation of Neo4j over Mac OS X

Creating your first graph with Neo4j

Importing data from the CSV format to Neo4j

Importing data from RDBMS to Neo4j

Importing data from the Geoff format to Neo4j

Importing data from OrientDB to Neo4j

Importing data from InfiniteGraph to Neo4j

Importing data from the DEX graph database to Neo4j

Common configurations of Neo4j

Running multiple instances of Neo4j over a single machine

Building Neo4j from the source

2. Connecting to Neo4j

2. Connecting to Neo4j

Introduction

Accessing Neo4j from the command line using the Neo4j shell

Accessing Neo4j from the command line using curl

Accessing Neo4j from the Java libraries

Accessing Neo4j using the Java REST bindings

Mapping Neo4j to Java-annotated classes using Spring Data Neo4j

Accessing the embedded Neo4j from Python

Accessing Neo4j from Python using the REST bindings

Annotate the Python object model to the Neo4j graph database

Accessing the embedded Neo4j from Ruby

Accessing Neo4j from Ruby using the REST Bindings

Accessing Neo4j from Scala

Accessing Neo4j from .NET

Accessing Neo4j from PHP

Accessing Neo4j from Node.js

3. The Cypher Query Language

3. The Cypher Query Language

Introduction

Creating your first node and relationship using Cypher

Querying nodes and relationships using Cypher

Deleting data from Neo4j using the Cypher query

Boolean operators with Cypher

Changing the order of results with Cypher

Limiting and skipping results with Cypher

Regular expressions with Cypher

Aggregation with Cypher

Combining results with Cypher

Finding paths in Cypher along with their shortest route

4. Data Modeling and Leveraging with Neo4j

4. Data Modeling and Leveraging with Neo4j

Introduction

Data modeling with Neo4j – moving away from traditional SQL

Aggregate versus connected data models

Creating a binary search tree with Neo4j

Healthcare data modeling with Neo4j

Travel data modeling with Neo4j

Social data modeling with Neo4j

Retail data modeling with Neo4j

5. Mining the Social Treasure

5. Mining the Social Treasure

Introduction

Finding mutual friends with Neo4j

Finding friends of friends with Neo4j

Activity streaming with Neo4j

Finding user similarity with Neo4j

Network reachability with Neo4j

6. Developing Location-based Services with Neo4j

6. Developing Location-based Services with Neo4j

Introduction

Installing the Neo4j Spatial extension

Importing the Esri shapefiles

Importing the OpenStreetMap files

Importing data using the REST API

Creating a point layer using the REST API

Finding geometries within the bounding box

Finding geometries within a distance

Finding geometries within a distance using Cypher

7. Visualization of Graphs

7. Visualization of Graphs

Introduction

Visualization using the Neo4j console

Viewing your graph with Linkurious

The Neo4j graph with Gephi

Visualization with Neoeclipse

8. Industry Usages of Neo4j

8. Industry Usages of Neo4j

Introduction

Healthcare with Neo4j

The social networking industry with Neo4j

The travel industry with Neo4j

E-commerce with Neo4j

9. Neo4j Administration and Maintenance

9. Neo4j Administration and Maintenance

Introduction

Deploying Neo4j over the Amazon EC2 Cloud

Deploying Neo4j over the Heroku Cloud

Deploying Neo4j over the Microsoft Azure Cloud

Backups with Neo4j

Upgrading Neo4j to the latest version

Neo4j's remote debugging setup

Configuring secure access to your Neo4j instance

10. Scaling Neo4j

10. Scaling Neo4j

Introduction

A bulk upload of the initial large dataset

The high availability setup

Handling high read loads

Handling high write loads

Optimizing the Cypher query for performance

Index

Index

Running multiple instances of Neo4j over a single machine

Many times, there will be a need to run multiple instances of Neo4j over a single machine.

In this recipe, you will learn about how to run multiple instances of Neo4j.

Getting ready

To get started with this recipe, install Neo4j by using the steps from the earlier recipes of this chapter.

How to do it...

Neo4j can handle only a single graph instance. To run multiple graph instances, you have to run multiple Neo4j servers over the same machine, as follows:

Replicate the configuration file for each instance and change the following parameters:
```
org.neo4j.server.database.location=data/graph.db
```
Change this path for each instance by setting different database paths for different instances. Also, for each instance, set different ports for the web console, which is shown in the following parameter:
```
org.neo4j.server.webserver.port=5678
```
Now, restart the Neo4j server by using the following command:
```
./neo4j restart
```

How it works...

Neo4j can handle only one instance at a time. In order to run multiple instances of Neo4j, we have to replicate the files and change the graph database directory of each instance.

See also

To know more about the configuration options, check out http://neo4j.com/docs/stable/server-configuration.html.

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