Aug 14 2018
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Java, Problems

Building a Dating site with Neo4j – Part Five

You ever eaten at a “Fusion Cuisine” type of restaurant? It’s a bit of a gamble. Personally I’m always up for eating just about anything… except Pho. That stuff messes me up. But back to fusion cuisine. I think my favorite is Indian and Mexican. Take your favorite Indian dish, wrap that in the warm embrace that is a burrito tortilla, heaven. Well, just about anything wrapped in a burrito is perfect. Why am I taking about Fusion and Wrapping stuff? Well, today we are going to add Auto Complete into our Dating Site, but before we can do that I need to talk to you about Neo4j’s Fusion Indexes and how they wrap the Lucene Indexes as well as our generation-aware B+tree (GB+Tree) indexes.
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Jul 19 2018
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Java, Problems

Building a Dating site with Neo4j – Part Four

In the last post, we created a User model, built the login and registration pages, hooked everything up in our front end framework Jooby and got the ball rolling. I’m no designer so I am borrowing a Application Bootstrap Theme and tweaking that as we go along (if you are a designer, pull requests are welcomed). At this stage a ton of it is just mockup, but we will replace it with real functionality. This is what we have so far:
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Jul 12 2018
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Java, Problems

Building a Dating site with Neo4j – Part Three

We started our back end service in the last blog post and created a schema and the ability to create and fetch users. We are going to flip to the front end to make use of these abilities and work on both side by side. The goal this time is to be able to register and sign in a user. If you are a regular reader you know I’m a fan of the Jooby framework, so we’re going to use that again. After creating a shell application, what I want to do is to be able to connect to the API we’re building, so we’ll be using Retrofit to turn our HTTP API into a Java interface.
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Jul 12 2018
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Java, Problems, Testing

Building a Dating site with Neo4j – Part Two

We came up with an idea for a dating site and an initial model in Part One. Next we are going to work on a back end HTTP API, because I’m old school and that’s the way I like it. We will build our HTTP API right into Neo4j using an extension which turns Neo4j from a Server into a Service. Unlike last time where we wrote a clone of Twitter, I don’t really know where I’m going with this, so let’s start with some of the obvious API endpoints and then we can design and build more as we go along. Is this Agile or am I just being an idiot? I can’t tell, so onward we go.
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Jul 11 2018
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Java, Problems

Building a Dating site with Neo4j – Part One

You might have already heard that Facebook is getting into the Dating business. Other dating sites have been using graphs in the past and we’ve looked at finding love using the graph before. It has been a while though, so let’s return to the topic making use of the new Date and Geospatial capabilities of Neo4j 3.4. I have to warn you though that I’ve been with Helene for almost 15 years and missed out on all this dating site fun, what I do know I blame Colin for it and some pointers from the comments section of this blog post.
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May 30 2018
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Java, Problems

Transmuting Documents into Graphs

Alchemy is a philosophical and protoscientific tradition practiced throughout Europe, Africa and Asia. Its aim is to purify, mature, and perfect certain objects. In popular culture we often see the case of shadowy figures trying to turn lead into gold to make themselves immensely rich or to ruin the world economy. In our case we will not be transmuting lead into gold, but documents into graphs which is just as good. In the past, we had used “Alchemy API” but they were purchased by IBM and retired. You can get similar functionality with IBM Watson, but let’s do something else instead. Let’s add Entity Extraction right into Neo4j.
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May 17 2018
1 Comment
Cypher, Problems

Offers with Neo4j

If you have started or are thinking about starting a Graph project, you ought to get in touch with me. I’ve been involved in hundreds of graph database backed projects and chances are I can point you in the right direction. It doesn’t cost anything to get on a goto meeting for an hour and talk about it. Contact me at max@neo4j.com to schedule it. If you are very serious and have a little budget allocated then I recommend you sign up for one of our bootcamps. You’ll be amazed at what we can accomplish together in a very short time. I’ll even make you a deal, if you sign up for a bootcamp and end up buying a commercial license, we’ll give you a week of professional services absolutely free.
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Mar 23 2018
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Cypher, Problems

Scheduling Meetings with Neo4j

One of the symptoms of any fast growing company is the lack of available meeting rooms. The average office worker gets immense satisfaction to their otherwise mundane workday when they get to kick someone else out of the meeting room they booked. Of course that joy can be cut short (along with their career) once realizing some unnoticed VIP was unceremoniously kicked out. It’s not a super exciting use case, but today I’m going to show you how to use Neo4j to perform some scheduling gymnastics.
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Mar 21 2018
5 Comments
Cypher, Problems

Neo4j Geospatial Queries

When I was growing up, the Neo Geo was the high end gaming system around. It was however prohibitively expensive for most people… and definitely out of my price range. I grew up in a mobile home park in Union City, CA. Near the old drive in theater now long gone. It was also next to an industrial park in Hayward where a food truck would make the best burritos $3 could buy. A search for the best burritos in Union City would have missed this food truck gem. Geographic boundaries can be a problem when searching for things by specific places. To get around this problem, we tend to use latitude and longitude and then perform a radius or bounding box search. Today I want to present to you a hybrid approach using Neo4j.

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Mar 12 2018
9 Comments
database

Keeping Properties Secret in Neo4j

We’re an open source company with nothing to hide, but some of our customers have things they need to keep close to their chest. Sometimes you don’t want everybody to have access to salary information, or future predictions. Maybe you want to hide Personally identifiable information (PII) or Health Insurance Portability and Accountability Act (HIPPA) data. In Neo4j 3.4 we are introducing more security controls. We are starting with Role based Database wide property key blacklists. That’s a bit of a mouthful but let’s walk through and example to see one of the ways it can be utilized. Imagine you are working in “Area 51” and have to deal with very important information.
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