Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
SlideShare a Scribd company logo

Modules or microservices?

•
•

Microservices promise a scalable architecture, increased flexibility, and better performance. But then you find out what’s actually involved in designing, developing, and running a microservices-based architecture. It turns out it’s not that straightforward after all. Often the discussion around microservices is framed by a false dichotomy between the messy monolith and the lean and mean microservices architecture. Sander Mak explains that there’s a third way: the modularized application. Functional decomposition of your application doesn’t imply that every component has to become its own independent process. Modularization is about strong encapsulation, well-defined interfaces, and explicit dependencies. Many languages offer in-process modularization features (for example, Java 9 with its upcoming module system), and there’s a strong overlap between the microservices philosophy and development benefits—without incurring the penalty of operational complexity. Sander explores the right (and wrong) reasons for going with a microservices architecture, as well as what a modularized application entails. You’ll see that splitting up an existing service or application into microservices isn’t always the clear winner. You’ll leave able to choose between the alternatives for the right reasons. There’s a place for both independently deployed microservices and larger applications with a strong internal modular structure. Choose wisely.

1 of 117
Download to read offline
Modules or Microservices? @Sander_Mak
About Sander Fellow, Software Architect @ Luminis Experience in modular development stacks Conference Speaker & Author
@Sander_Mak Modules or Microservices?
@Sander_Mak Modules or Microservices? YES
@Sander_Mak Modules XOR Microservices? YES
@Sander_Mak Modules XOR Microservices? IT DEPENDS
@Sander_Mak Let's Talk About Modularity
Why Modularity?
Why Modularity?
Why Modularity? No. 1 Software Architecture Principle
@Sander_Mak The Three Tenets of Modularity Strong Encapsulation
@Sander_Mak The Three Tenets of Modularity Strong Encapsulation Well-Defined Interfaces
@Sander_Mak The Three Tenets of Modularity Explicit Dependencies Strong Encapsulation Well-Defined Interfaces
@Sander_Mak Modularity is the ultimate Agile Tool
@Sander_Mak Let's Talk About Microservices
@Sander_Mak A Microservice is... Independently deployable Implementing a business capability Doing one thing, and doing it well Communicating over the network
What's This?
What's This? Microservices Devroom
What's This? Microservices Devroom Despair
What's This? Microservices Devroom Despair Praying for a Better Solution
@Sander_Mak Yes, Microservices Are Hard However...
@Sander_Mak Yes, Microservices Are Hard However... Introspection: When (not)
@Sander_Mak Yes, Microservices Are Hard However... Introspection: When (not) Alternative: Modules
@Sander_Mak Why? Manage Complexity Scaling Resilience
@Sander_Mak Why? Manage Complexity Scaling Resilience Modularity In Disguise!
@Sander_Mak users assignments learningmaterial students grading courses attendance Microservices
@Sander_Mak users assignments learningmaterial students grading courses attendance Microservices Monolith? users studentslearningmaterial shipping courses forecasting attendance
@Sander_Mak users assignments learningmaterial students grading courses attendance Microservices Monolith? users studentslearningmaterial shipping courses forecasting attendance
@Sander_Mak Features Cost
@Sander_Mak Messy Monolith Features Cost
@Sander_Mak Messy Monolith Microservices All The Way Features Cost
@Sander_Mak Messy Monolith Microservices All The Way Features Cost
@Sander_Mak Microservices: Distributed system Service Discovery ? ? ? ? users assignments learningmaterial students grading courses attendance
@Sander_Mak users assignments learningmaterial students grading courses attendance Microservices: Distributed system Network Fallacies
@Sander_Mak users assignments learningmaterial students grading courses attendance Microservices: Distributed system Deployment
@Sander_Mak Microservices: Distributed system Config. Management v1 v2 v3 v2 v3 at least x4 (DTAP) users assignments learningmaterial students grading courses attendance
@Sander_Mak Microservices: Security users assignments learningmaterial students grading courses attendance Distributed system
@Sander_Mak Messy Monolith Microservices All The Way Features Cost
@Sander_Mak Messy Monolith Microservices All The Way Features Cost But... vendors?!
@Sander_Mak Messy Monolith Microservices All The Way Features Cost But... vendors?! Won't magically transform your organization!
@Sander_Mak Let's Talk About Modules
@Sander_Mak users assignments learningmaterial students grading courses attendance Microservices
@Sander_Mak users assignments learningmaterial students grading courses attendance Microservices Monolith? users studentslearningmaterial shipping courses forecasting attendance
@Sander_Mak Microservices Modules! users assignments learningmaterial students grading courses attendance Modular app users assignments learningmaterial students grading courses attendance
@Sander_Mak Messy Monolith Microservices All The Way Modular App Features Cost
@Sander_Mak Messy Monolith Microservices All The Way Modular App Features Cost
@Sander_Mak So, Modules. Did You Mean Objects?
@Sander_Mak So, Modules. Did You Mean Objects? Close, but Too Fine-grained.
@Sander_Mak Module Systems
@Sander_Mak Module Systems Java OSGi Java 9
@Sander_Mak Module Systems Java OSGi Java 9 JavaScript ... ES2015 Modules
@Sander_Mak Module Systems Java OSGi Java 9 JavaScript ... ES2015 Modules C++ C++20?
@Sander_Mak Module Systems Java OSGi Java 9 JavaScript ... ES2015 Modules C++ C++20? .Net NuGet .Net Core
@Sander_Mak Explicit Dependencies Strong Encapsulation Well-Defined Interfaces Module Systems Java OSGi Java 9 JavaScript ... ES2015 Modules C++ C++20? .Net NuGet .Net Core
@Sander_Mak Module Systems: Java 9 module attendance { exports attendance.api; requires students; requires courses; }
@Sander_Mak Module Systems: Java 9 module attendance { exports attendance.api; requires students; requires courses; } Strong Encapsulation
@Sander_Mak Module Systems: Java 9 module attendance { exports attendance.api; requires students; requires courses; } Strong Encapsulation Well-Defined Interfaces
@Sander_Mak Module Systems: Java 9 module attendance { exports attendance.api; requires students; requires courses; } Explicit Dependencies Strong Encapsulation Well-Defined Interfaces
@Sander_Mak Module Systems: Java 9 Module Resolution (Reliable Configuration) Increased Security (Hide Platform Internals)
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; }
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; } import { sq } from mymodule; console.log("Two squared", sq(2));
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; } Strong Encapsulation import { sq } from mymodule; console.log("Two squared", sq(2));
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; } Strong Encapsulation Well-Defined Interfaces import { sq } from mymodule; console.log("Two squared", sq(2));
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; } Explicit Dependencies Strong Encapsulation Well-Defined Interfaces import { sq } from mymodule; console.log("Two squared", sq(2));
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; } import { sq } from mymodule; console.log("Two squared", sq(2)); Consider TypeScript
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; } Well-Defined Interfaces import { sq } from mymodule; console.log("Two squared", sq(2)); Consider TypeScript
@Sander_Mak Module Systems: ES2015 export function sq(i) { return secret(i); } function secret(i) { return i * i; } import { sq } from mymodule; console.log("Two squared", sq(2)); (let's not go there...)
@Sander_Mak Module Systems: C++20? module mymodule; export int sq(int i) { return secret(i); } int secret(int i) { return i * i; }
@Sander_Mak Module Systems: C++20? module mymodule; export int sq(int i) { return secret(i); } int secret(int i) { return i * i; } #include <stdio.h> import std.io import mymodule int main() { printf("Two squared %d", sq(2)); return 0; }
@Sander_Mak Module Systems: C++20? module mymodule; export int sq(int i) { return secret(i); } int secret(int i) { return i * i; } #include <stdio.h> import std.io import mymodule int main() { printf("Two squared %d", sq(2)); return 0; } Strong Encapsulation
@Sander_Mak Module Systems: C++20? module mymodule; export int sq(int i) { return secret(i); } int secret(int i) { return i * i; } #include <stdio.h> import std.io import mymodule int main() { printf("Two squared %d", sq(2)); return 0; } Strong Encapsulation Well-Defined Interfaces
@Sander_Mak Module Systems: C++20? module mymodule; export int sq(int i) { return secret(i); } int secret(int i) { return i * i; } #include <stdio.h> import std.io import mymodule int main() { printf("Two squared %d", sq(2)); return 0; } Explicit Dependencies Strong Encapsulation Well-Defined Interfaces
@Sander_Mak So, Modules Everywhere!
@Sander_Mak So, Modules Everywhere! > Objects < Applications
@Sander_Mak users app.users.User app.users.UserInfo app.users.internal.UserImpl app.users.internal.Util; assignments ... ... courses ... ... students ... ... attendance ... ... grading ... ... learningmaterial ... ... Not Just on the Whiteboard
@Sander_Mak users app.users.User app.users.UserInfo app.users.internal.UserImpl app.users.internal.Util; assignments ... ... courses ... ... students ... ... attendance ... ... grading ... ... learningmaterial ... ... Not Just With Discipline
@Sander_Mak Modules or Microservices? IT DEPENDS
@Sander_Mak Manage Complexity Scaling Resilience
@Sander_Mak Manage Complexity Scaling Resilience
@Sander_Mak Manage Complexity Scaling Resilience ? ?
@Sander_Mak Advantages of Modules Ease of Deployment & Management
@Sander_Mak Advantages of Modules Ease of Deployment & Management Modular Application
@Sander_Mak Advantages of Modules Strong but Refactorable Boundaries
@Sander_Mak Advantages of Modules Strong but Refactorable Boundaries https://www.infoq.com/presentations/microservices-future ~1800 microservices
@Sander_Mak Advantages of Modules Strong but Refactorable Boundaries "The [Linux] project is structured so people can work independently, Torvalds explained. "We've been able to really modularize the code and development model so we can do a lot in parallel." - El Reg
@Sander_Mak Advantages of Modules Strongly typed, In-Process Communication
@Sander_Mak Advantages of Modules Strongly typed, In-Process Communication No Serialization or Network Latency
@Sander_Mak Advantages of Modules Strongly typed, In-Process Communication Ever Tried Serializing a Function?
@Sander_Mak Advantages of Modules Strongly typed, In-Process Communication GraphQL or Protobuf > REST
@Sander_Mak Advantages of Modules Strongly typed, In-Process Communication
@Sander_Mak Advantages of Modules Strongly typed, In-Process *Synchronous* Communication
@Sander_Mak Advantages of Modules Eventual Consistency is a Choice
@Sander_Mak Advantages of Modules Eventual Consistency is a Choice It's Still a Good Idea to Partition Data
@Sander_Mak Advantages of Microservices Best Stack for Each Service
@Sander_Mak Advantages of Microservices Best Stack for Each Service learningmaterial students assignments (but is your org ready for this?)
@Sander_Mak Advantages of Microservices Independent Deployment learningmaterial students assignmentsv2 v3 v1
@Sander_Mak Advantages of Microservices Independent Deployment learningmaterial students assignmentsv2 v3 v1 (beware of deployment dependencies!)
@Sander_Mak Advantages of Microservices Independent Deployment learningmaterial students assignmentsv2 v3 v1 Modularized App > Distributed Monolith (beware of deployment dependencies!)
@Sander_Mak Advantages of Microservices Independent Failure learningmaterial students assignments
@Sander_Mak Advantages of Microservices Independent Failure learningmaterial students assignments (when your services are truly autonomous...)
@Sander_Mak Advantages of Microservices Independent Scaling assignments learningmaterial 4x g2.2xlarge 2x t2.medium 1x t2.micro students
@Sander_Mak Advantages of Microservices vs. Uniform Scaling Modular Application 3x t2.large
@Sander_Mak It's Time to Wrap Up
@Sander_Mak
@Sander_Mak At the speed of light, everything changes!
@Sander_Mak At the speed of light, everything changes! Dude, chill. The apple still doesn't fall far from the tree.
@Sander_Mak Don't Solve Problems You Don't Have At the speed of light, everything changes! Dude, chill. The apple still doesn't fall far from the tree.
@Sander_Mak You Are (most likely) Not at Uber or Netflix Scale scale organizations
@Sander_Mak You Are (most likely) Not at Uber or Netflix Scale scale organizations
@Sander_Mak You Are (most likely) Not at Uber or Netflix Scale scale organizations the 80% of us
@Sander_Mak Solve Problems You Do Have In The Simplest Possible Way
@Sander_Mak Solve Problems You Do Have In The Simplest Possible Way At Least Read Up on Modular Development In Your Tech Stack of Choice Explicit Dependencies Strong Encapsulation Well-Defined Interfaces
@Sander_Mak Design as Microservices, Build as Modules You Can Move to (Micro)services Later.
@Sander_Mak Design as Microservices, Build as Modules You Can Move to (Micro)services Later. Modules Enable
 Larger Services!
@Sander_Mak Design as Microservices, Build as Modules Don't worry, you can still do: Reactive NoSQL Cloud DevOps DDD
@Sander_Mak Messy Monolith Microservices All The Way Modular App Features Cost
Thanks. Read More: bit.ly/modularapps bit.ly/java9book @Sander_Mak

More Related Content

Modules or microservices?