Adding query parameters to single requests is straight forward. You’re using the @Query annotation for your parameter declaration within the interface methods. This tells Retrofit to translate the provided query parameter name and value to the request and append the fields to the url. Recently, we’ve been asked …

During the last weeks, we’ve learned the fundamentals of three important components of the CoreOS ecosystem. Additionally, you’re able to manage key-value-pairs within etcd and services within our cluster using fleet featuring systemd. This gives us all the required knowledge to finally make the step from just running …

You’ve already learned how to add custom request header using Retrofit. This post specifically touches the details on adding request headers using Retrofit 2 and the OkHttp interceptor. Interceptors are a good way to statically change requests executed with the specific service client which has the interceptor assigned. {{outline} …

There are multiple ways to send data from your client to a server. This post continues the first article on how to use form-urlencoded requests with Retrofit to transmit data with your request. If the API you’re going to request accepts a simple JSON payload for processing, this approach …

Multiple methods exist to send data to your server. You may already know how to send data within the request body or how to make use of multipart/form-data to upload files using Retrofit. If not and you’re interested, follow the lead :) There’s another type available to send …

If you’ve read the previous articles within this CoreOS series, you’re already familiar with an essential component within the ecosystem: etcd. This post will introduce two other fundamental components of the CoreOS: fleet and systemd {{outline}} systemd systemd is an init system providing functionality to manage processes on …

As a regular reader of this blog, you’ve already noticed that we’re huge fanboys of Retrofit. What started out with a series of 14 blog posts, is grown to a pipeline of more than 35 posts in the Retrofit series. It has been an impressive and overwhelming journey …

This is the second part about etcd and completely geared towards etcd’s HTTP/JSON API and the command line utility etcdctl. Within the previous post on etcd, we described how etcd can bootstrap a new cluster with the help of an existing one. Further, we showed you two configuration …