API Architecture - The Big Picture for Building APIs by Matthias Biehl

By Matthias Biehl

Searching for the large photograph of establishing APIs? This booklet is for you! construction APIs that buyers love may still definitely be the target of any API initiative. in spite of the fact that, it truly is more straightforward stated than performed. It calls for getting the structure on your APIs correct. This ebook equips you with either foundations and most sensible practices for API structure. This booklet is for you with the intention to comprehend the massive photograph of API layout and improvement, you need to outline an API structure, determine a platform for APIs or just are looking to construct APIs your shoppers love. This ebook isn't for you, when you are searching for a step-by step advisor for construction APIs, targeting each element of the proper software of leisure rules. consequently i like to recommend the publication "API layout" of the API-University sequence. what's API structure? structure spans the larger photo of APIs and will be obvious from a number of perspectives:

API structure may well check with the structure of the whole answer consisting not just of the API itself, but additionally of an API consumer comparable to a cellular app and a number of other elements. API resolution structure explains the elements and their relatives in the software program solution.
API structure may perhaps confer with the technical structure of the API platform. while construction, working and exposing not just one, yet a number of APIs, it turns into transparent that yes development blocks of the API, runtime performance and administration performance for the API have to be used again and again. An API platform presents an infrastructure for constructing, working and handling APIs.
API structure may possibly check with the structure of the API portfolio. The API portfolio comprises all APIs of the company and desires to be controlled like a product. API portfolio structure analyzes the performance of the API and organizes, manages and reuses the APIs.
API structure might consult with the layout judgements for a selected API proxy. To rfile the layout judgements, API description languages are used. We clarify using API description languages (RAML and Swagger) on many examples.

This publication covers all the above views on API structure. even if, to turn into priceless, the structure should be placed into perform. the reason for this is that this ebook covers an API method for layout and improvement. An API technique presents useful directions for placing API structure into perform. It explains easy methods to enhance an API structure into an API that buyers love. most of the details on APIs is accessible on the internet. such a lot of it truly is released by way of owners of API items. i'm continuously a piece suspicious of technical details driven through product owners. This ebook is various. during this e-book, a product-independent view on API structure is gifted. The API-University sequence is a modular sequence of books on API-related themes. every one e-book makes a speciality of a selected API subject, so that you can decide upon the subjects inside of APIs, that are suitable for you.

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For HTTP methods relevant characteristics are, whether the HTTP method is safe and idempotent. Idempotent methods can be repeated without altering the end result; executing the method multiple times has the same effect as executing the method only once. Safe methods do not have any side effects, do not change the state of the resource and are read-only. REST is incompatible with the commonly used procedure-oriented style for web services, where procedures are first class objects. When defining procedure-oriented interfaces, activities or operations are the abstraction and services encapsulate procedures.

APIs can be used by apps, but they can also be used by other APIs. In this case, APIs become the building blocks for bigger APIs and are thus reused. If not the complete API can be reused, at least a part of the API could be reused. Common functionality can be factored out into shared libraries and the shared libraries are reused. The reuse and the consistency requirement go hand in hand and lead to the same results. Customization A successful API portfolio addresses and satisfies the needs of its API consumers.

The creation of a new REST API does not require a lot of overhead. In comparison, the creation of SOAP services requires a larger overhead, due to the specification of WSDL files with a compatible implementation. The REST limitation to the uniform resource interface contributes to the explorability and discoverability of APIs. With some experience in HTTP, the available methods are self-explanatory, intuitive and predictable, since the same methods are used in each and every API. As a result, consumers can quickly access the service and perform calls.

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