Building microservices with · 2019-07-08 · Learn from AWS experts. Advance your skills and knowledge. Build your future in the AWS Cloud. Digital Training Free, self-paced online

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Building microservices with event-driven architecture

Donnie PrakosoTechnical Evangelist, AWS


Agenda

1. Moving from monolith to microservices

2. Overview of event-driven architecture

3. Asynchronous messaging in microservices architecture

4. Building a real-time communication application with WebSocket

5. Moving forward: Orchestration and state management


Building a voting application—with microservices



MonolithDoes everything


What do we need?


Microservices

Do one

thing wellIndependent

Decentralized

Black box

Polyglot

You build it, you run it


Overview of event-driven architecture


Serverless compute engine

for containers

Long-running

Bring existing code

Fully managed orchestration

AWS Fargate

Serverless event-driven

code execution

Short-lived

All language runtimes

Data-source integrations

AWS Lambda


Microservice AP

I

AP

I Microservice

MicroserviceE

ve

nt

AP

IMicroservice

Eve

nt

AP

I Microservice

Application

Mobile client

Client

Internet of

Things (IoT)

Persistence Persistence


Communication is the front door of microservices


Communication in microservices architecture


Communication categories

Protocol Receiver(s)

• Synchronous messaging

• ex., HTTP

• Asynchronous messaging

• ex., JMS, MQTT

• Single receiver

• ex., message queue

• Multiple receivers

• ex., Pub/Sub


Challenge of synchronous messaging

Client

AP

I Microservice A

AP

I Microservice B

AP

I Microservice C


Synchronous and asynchronous communication

Synchronous

Request-Response

Immediate access to results

You manage:

- Retries

- Ordering

- Error handling

- Blocking and threads

- Timeouts

Asynchronous

Fire (and forget)

Default behavior:

- Retries

- Ordering

- DLQ errors

- Throughput

You manage:

- Error response

- Duplicates



Decoupling into smaller, independent building blocks using messaging


Decoupling into smaller, independent building blocks using messaging

Queues

Simple

Fully managed

Any volume

Pub/Sub

Simple

Fully managed

Flexible

Amazon Simple

Queue Service

(Amazon SQS)

Amazon Simple

Notification

Service

(Amazon SNS)

Messaging

Synchronization

Rapid

Fully managed

Real time

Amazon

CloudWatch

Events


Pub/Sub pattern

The publish/subscribe model

allows messages to be

broadcast to different parts of

a system asynchronously.

Amazon SNS message

filteringOffload the message filtering

logic from subscribers and the

message routing logic from

publishers.


Demo: Pub/Sub


Building a real-time communication with WebSocket


WebSocket support for API Gateway

Real-time two-way

communication

applications backed

by AWS Lambda

functions or other

Amazon API

Gateway

integrations

Amazon API Gateway


Demo:WebSocket API


Microservices implementation


Microservices demo: Voting application


Microservices demo: Voting application



Moving forward: Orchestration and state management


Productivity

Agility

Resilience

Build distributed applications using visual workflows

Order Service

Inventory Service

Invoice Service

Logistic Service

Notification Service

AWS Step Functions


Track status of data

and execution

Remove

redundant code

Build workflows to orchestrate everything


Increase

customer

value

Build better

products

Innovate

more often

Release

features

faster

Focus on

business

logic

Decouple

software

systems

Automate and abstract away as much as possible so we can focus on building

products for our customers

We are witnessing a paradigm shift


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Building microservices with · 2019-07-08 · Learn from AWS experts. Advance your skills and knowledge. Build your future in the AWS Cloud. Digital Training Free, self-paced online