Tag Archives: graph

Aug 27 2018
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Java, Problems

Building a Dating site with Neo4j – Part Ten

A few days ago I taught the Neo4j Modeling class in Dallas… well my own version of the class since I teach some of the older material plus some of my blog posts. If you ever get the chance, take the class, it will open your eyes at what is possible when “third normal form” gets thrown out the window and a whole new world of possibilities is before you. The next modeling class I’m teaching will be at Graph Connect in NYC on September 20-21, 2018. I recommend you join me, unless of course you are looking at this after it occurred, then catch the next one.
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Aug 21 2018
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Java, Problems

Building a Dating site with Neo4j – Part Nine

Now that our users can high five and low five each other, we want to show the other person those high fives and low fives. Well…do we really want to show the low fives? I’m not sure. A few years ago we talked about how to store the people who “swiped left” on a user (aka the “asholes” of Tinder). In this case, the user is not rejecting a person forever, they are just putting down one of their posts. If it’s two people who are competing for dates, then maybe the low five has a negative intent, but it would make the person who wrote the post feel they are doing something right. If the low five was from a potential mate, it could be a case of “negging” ( which is stupid and you should never do that to people), it could be in jest if it was from someone they already had a conversation with, it could just have negative intent or maybe a clumsy tap on the wrong button. We don’t really know.
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Aug 20 2018
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Java, Problems

Building a Dating site with Neo4j – Part Eight

Up to this point we have a timeline of posts from people we want to date, but no way to interact with those people. The first step begins today as we will allow users to High Five and Low Five posts. Recall that once a user has high fived your post, you will be able to message them for up to 5 days when the high five expires. If you do not wish to message them, that’s fine, their high five gives you an additional high five to give to someone else in the hopes they message you. Remember that all users get 5 “free” High Fives a day, if they want more they have to earn them. You can get a High Five on a post that is older than 5 days, it still counts. This is needed to create the opportunity to bring back a user who hasn’t been to the dating site in a while with a High Five to an old Post. Otherwise after 5 days of inactivity, those users would be practically deleted.
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Aug 16 2018
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Java, Problems

Building a Dating site with Neo4j – Part Seven

Now it is time to create the timeline for our users. Most of the time, the user wants to see posts from people they could High Five in order to elicit a conversation. Sometimes, they want to see what their competition is doing and what kind of posts are getting responses… also who they can low five. I don’t think they don’t want to see messages from people who are not like them and don’t want to date them but I could be wrong.
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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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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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