Designing a config API for microservices applications built using Go

• jennifer

  6 3,189 3.7 Go

  Jennifer is a code generator for Go

The design of the wrapper functions meant we couldn’t easily unmarshal the CUE value into the wrapper functions. This meant we needed to generate unmarshalled functions for the config types. We use the excellent Jennifer library by Dave (no really; github.com/dave/jennifer) for generating Go files.

• jsoniter

  12 13,100 0.0 Go

  A high-performance 100% compatible drop-in replacement of "encoding/json" (by json-iterator)

  

For each Go type used within the config, we generate a separate unmarshaller function. The unmarshallers use json-iterator to process the output from CUE, while tracking the path within the config to the unmarshalled value. This path tracking will allow the function to check if live overrides have been provided on that path and return the override instead.

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• Encore

  35 4,810 9.7 Go

  Encore is the Backend Development Platform purpose-built to help you create event-driven and distributed systems.

  

We launched the initial version of config a couple of weeks ago in version 1.9.0. However, this is only the start of our journey of improving the state of the configuration of backend developers. As discussed above one of the key features we want to add next is the ability to allow applications to have parts of their configuration updated in realtime on a time-limited basis for dealing with incidents. This means adding a new API to give you the ability to get a channel from each wrapper to watch for changes in the value, allowing your application to react to configuration changes, such as resetting rate limiters to the new rates.

• cue

  110 4,779 9.8 Go

  The home of the CUE language! Validate and define text-based and dynamic configuration

  

Finally, we settled on the same configuration language that we use internally for our own systems: CUE Lang. As it has many of the properties we where after:

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