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This has been my approach to internal service design as well. It's far easier to make sure people integrate properly by providing a rich, well-documented API c

This has been my approach to internal service design as well. It's far easier to make sure people integrate properly by providing a rich, well-documented API client library than it is to rely solely on the REST-based one. REST APIs are hard to document, and require a lot of orthogonal boilerplate to even make the requests properly. Making a client library is also a great way to "dogfood" your REST API - you know a developer will write code, not HTTP calls, to interact with your service. The client API allows you to test out that code and make sure your API is well designed.

arethuza 14y ago
"require a lot of orthogonal boilerplate to even make the requests properly" What kind of boilerplate would that be? For me one of the big advantages of a RESTful interface is that they are really easy to call from cURL without much need for building up a complex context.
- e28eta 14y ago
  I found the translation between native code and a REST API to be what I'd call boilerplate. You need to build a URL, build the request (usually converting some model object into JSON), make the request in a non-blocking fashion, receive and parse the response into either a successful response, probably converting JSON back into a model object, or a failed response, which needs to be mapped to some native representation and passed back into the business logic. Contrast that with a client library which can do all of that for you, for example: taking a native model object and calling one of two callback functions provided, letting you concentrate on the business logic of your app. I'm not arguing that a client library is the right way to go, but I certainly understand where the grandparent is coming from RE: boilerplate code. Also, this is going to be heavily influenced by the language and libraries you're using.
  - MatthewPhillips 14y ago
    Except company B uses a single callback, returning an object that contains an error code when not successful. Company C uses a blocking library, and requires you to pass in your model object as a dictionary. See where I'm going with this?

arethuza 14y ago

"require a lot of orthogonal boilerplate to even make the requests properly" What kind of boilerplate would that be? For me one of the big advantages of a RESTful interface is that they are really easy to call from cURL without much need for building up a complex context.

e28eta 14y ago
I found the translation between native code and a REST API to be what I'd call boilerplate. You need to build a URL, build the request (usually converting some model object into JSON), make the request in a non-blocking fashion, receive and parse the response into either a successful response, probably converting JSON back into a model object, or a failed response, which needs to be mapped to some native representation and passed back into the business logic. Contrast that with a client library which can do all of that for you, for example: taking a native model object and calling one of two callback functions provided, letting you concentrate on the business logic of your app. I'm not arguing that a client library is the right way to go, but I certainly understand where the grandparent is coming from RE: boilerplate code. Also, this is going to be heavily influenced by the language and libraries you're using.
- MatthewPhillips 14y ago
  Except company B uses a single callback, returning an object that contains an error code when not successful. Company C uses a blocking library, and requires you to pass in your model object as a dictionary. See where I'm going with this?