Gartner Research

Decision Point for API and Service Implementation Architecture

Published: 21 June 2018

ID: G00351010

Analyst(s): Gary Olliffe


Modern application architectures use service-oriented principles to deliver new functionality via APIs and refactor existing applications. Technical professionals responsible for designing APIs and services must select the best architecture for each using critical nonfunctional criteria.

Table Of Contents

Decision Point Question

Decision Overview

  • Architectural Context
    • Know Your SOA Philosophy

Decision Tool

Principles, Requirements and Constraints

  • Requirements and Constraints
    • Accessing Existing Data Assets
    • Accessing Existing Application Assets
    • Supporting Asynchronous Messaging Patterns
    • Implementing Complex Services
    • Processing Unbounded Streams of Data and Events
    • Modernizing Application Infrastructure
    • Supporting Delivery Agility
    • Enabling Service Implementation Productivity
    • Dynamic Scalability and Provisioning to Handle Volatile Workloads


  • Data Services Architecture
    • When to Use a Data Services Architecture
  • Services Integration Architecture
    • When to Use a Services Integration Architecture
  • Streaming Architecture
    • When to Use a Streaming Architecture
  • Coarse-Grained Services Architecture
    • When to Use a Coarse-Grained Services Architecture
  • Microservices Architecture
    • When to Use a Microservices Architecture
  • Serverless Architecture
    • When to Use a Serverless Architecture

Future Developments

  • Event-Driven Architectures
  • Internet of Things Solutions
  • Continued Evolution of PaaS and Container-Based Tools
  • Digital Business Drives Microservices, Containers and aPaaS

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