Go dep in Docker

Go’s dependency handling has been an area which has been needing unification, over the years. Multiple package managers have been created. The Go community has been working on creating a dependency manager recently, which they plan on getting added to the official toolchain. I’ve decided to jump on the bandwagon and start using this tool. Here’s how I’ve been using it in docker.

RabbitMQ One consumer blocking others

I’ve been working on a distributed application that requires multiple workers to process items from a queue. I decided to use RabbitMQ as the queue. However I noticed that there was a 10 minute pause or whenever the consumer started up. After looking into it further I noticed that it appeared that only one consumer could run at any given time.

Increase docker device size on Ubuntu

So I’ve got an application that I’m running via and Docker. That requires a certain amount of disk space and would run out of space very quickly with the default 10G limit that Docker comes with.

Are you a good developer

In development we constantly bemoan bad developers. But what I’ve noticed is everyone generally thinks they’re doing a good job and the other developers are bad. I don’t think you can exactly define what is a good developer down to a tee but I think you can have rough benchmarks for whether or not you’re good. These generally are if you follow well defined practices. There are levels of development practices ranging from the basics (DRY) to advance (CQRS).

What I learned with a big database

So I recently started a new side project that involves data mining. While working on this project I’ve learned a little bit about how to manage a larger than usual database. At the point of writing this the database is approximately 50GB and growing daily. So here are a few things I’ve learned. Backups This is probably the main area where I learned a bunch of stuff. Usually when you’re dealing with a database of approximately 1GB in size, backups at midnight are rather routine.

Symfony Password encoding

A very simple breakdown of how the password encoding works with Symfony 2. Encoder factory The encoder factory is where you get your password encoders from. You pass in a User entity and it returns an Encoder. Encoders are created from the encoder configs and stored within the factory, there is only a single instance of the encoder unless you clone it outside of the factory. The encoder configs are passed to the factory upon creation.

Hack: Types

Facebook’s Hack bring lots of features that a lot of other programming languages get to take advantage of. One of major advantages of Hack over PHP is a typing system. So here’s a quick run over of the typing system as I understand it. Annotate Annotating is when you define which type is going to be used. You can type the following: function arguments function return class variable constants For function arguments you just put the type before the variable name for the argument.

Don't return null

If you’re programming in an object orientated language that supports exceptions you should never return null in a method that returns an object. Most object orientated languages support exceptions. Exceptions give us an extremely expressive way to represent error conditions. We throw an exception and the program bails out of where it is and then goes to the error handling section. We can create custom exceptions to express exactly what sort of error occured.

My Opinion on testing code with 3rd party API calls

I’ve recently had a discussion about how I would go about testing code that makes calls to a remote third party API. It seems my way of thinking isn’t the same as most others. So I figured I would write out my thoughts and explanation behind why I would go for this route. Others peoples approach So first I want to explain other peoples thought patterns seem to be. It goes like:

How I use Dependency Injection

I’ve been thinking about dependency injection a lot recently and the best way to do it in a clean manner. I recently changed how I was injecting some dependencies, at code review I was asked why. So I figured I would write a blog post fully stating my current views on how to implement Dependency Injection. There are three main ways of injecting a single dependency, as well as what I would consider two ways of injecting multiple dependencies these are also known as patterns.