This post is a follow up on our tutorial guiding you through the setup on how to submit and run a Node.js app on a CoreOS cluster. Within the previous post, we only showed you how to submit and run a single app instance on a given machine within …

You’ve already noticed our content flash to celebrate the Retrofit 2 release. This is another post as part of our contribution to push the Retrofit community forward by sharing the knowledge about internal changes of this Retrofit release. If you worked with Retrofit 1, you know the rudimentary behavior …

Retrofit 2 finally comes with an additional annotation for dynamic urls. What was a hackaround in Retrofit 1 is now just a single @Url annotation for the endpoint declaration. This post will show you how to make use of dynamic endpoint urls for individual requests. {{video}} {{outline}} Use-Case Scenarios There …

Adding request parameters can be kind of pain in the a** if your service methods allows multiple query parameters which also can be optional. We’ve published an article describing how to use optional query parameters. Today, we’re going to simplify the handling of multiple query parameters by introducing …

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 …