Consider the following situation: A bundle of .avro files is stored on HDFS. They need to be converted to Impala tables. Schemas are not provided with files, at least not externally (it’s contained as first line of any avro file). But Impala has a known-issue with avro tables, and its usage is pretty limited: we …
In this article I’ll describe you how to use GraphQL with Spring with this library. Full example is available here. Why annotations? From my point of view schema should not be written manually, just because it is easy to make a mistake. Schema should be generated from code instead. And your IDE can help you …
In this guide you’ll learn how to add deploy feature to the Erlang service. As a result you will get a real Erlang service, with logs in `/var/log/example_service`, systemd support and possibility to easy install it on every system via `enot install comtihon/example_service` even without Erlang installed!
This is step-by-step guide on how to create your Erlang service with the powerful Enot build system. Ensure you have Enot and Erlang installed locally. As a result you will build http service, which will listen the `8080` port and response JSON with service’s version and `MAGIC_GREETING` operation system’s environment variable or simple “hello world” …
Most of Erlang applications requires configuration variables. It can be: database credentials, metrics report hosts, some system limits and so on. Such variables can be set in application resource configuration file. They can be accessed with `application:get_env`. You should prefer dynamic configuration instead of hardcoded one. But what if you need different properties in configuration …
With this article, I would like to start a series on “Writing optimal and effective code in Erlang”. These articles are describing my point of view on the topic according to my experience in real world software development. I have been inspired by the marvelous book of M. Fowler and Co “Refactoring” if you …