Making a simple database for geo-data

Hello, gopher. Well, if you are not a gopher and want to become one, hello too. I propose to combine two things in this codelab: to learn Go, as a programming language, and, maybe, to learn a couple of new things for yourself.

The evironment

You will need the following:

1. Installed Go Programming Language
2. Configured GOPATH (For 1.8 not relevant)
3. You are familiar with basic things in Go. “Go” tour can help you with this

Purpose of laboratory work

This laboratory work has two purposes:

1. Get an experience in Go
2. Learn how does the key-value of the repository work (redis, memcached)
3. How some indexes work.

Eventually, the database will be able to do the following things:

• Quick search by the key;
• Search for places near you;
• HTTP interface to the database;
• LRU / expire mechanisms for data storage;

By Go you will get the following knowledge:

• How does concurrency work;
• Work with basic syntactic things;
• Test experience in go;
• Basic things with Makefile;

Table of contents

The workshop contains these steps

• Step 0. Setting of the problem
• Step 1. What you need to know about testing and writing tests in Go.
• Step 2. Hello world
• Step 3: Design the HTTP API
• Step 4. Make the HTTP API
• Step 5. Split main.go into several packages
• Step 6. Makefile, configuration and flags
• Step 7. Add a data warehouse and look for the nearest drivers in a naive way
• Step 8. Writing the first benchmark: why do we need it
• Step 9. What is R-tree and why is it more effective than naive implementation?
• Step 10. Implement the LRU (Part 1)
• Step 11. Implement the LRU (Part 2)
• Step 12: Making the repository consistent. Introducing the LRU
• Step 13: Implement the repository in the API
• Step 14. You have completed the course. Congratulations

Community and resources

There are several places where you can find information about Go:

• golang.org
• godoc.org here you can find the documentation for any package
• Go language blog

One of the most remarkable qualities of Go is its community.

Communities and channels in Telegram

1. @bishkekgophers - Bishkek Gophers
2. @devkg - Developers of Kyrgyzstan
3. @maddevsio - The channel of our company, where we share all kinds of interesting things. We often speak about Go

Communities in Slack

1. golang-ru.slack.com - The Russian-speaking community of gophers
2. gophers.slack.com - The English-speaking community of gophers. Invitation to get here https://invite.slack.golangbridge.org/

Podcasts

1. GolangShow - Russian-language podcast about Go-language
2. Gotime - English-language podcast about Go-language

Остальное

• Go Forum
• @golang and #golang on Twitter.
• Go+ community on Google Plus.

Благодарности

1. Francesc Campoy for his workshop Building Web Applications with Go
2. Ashley McNamara for the picture in the 10th step. You can see other works in repo
3. Elena Grahovac for the review and feedback