Ecotone
Business first
November 2023, PHPCon Poland
Agenda
Testing Messaging
Building Blocks
Resilient Messaging
Prepare the exercise
wifi pass: verdevilla
https://github.com/dgafka/
phpcon-2023-ecotone-workshop
Let's discuss Ecotone, but first...
focus on the...
Business
As this is what brings
the value
Common Application challenges to solve:
Integration & Boilerplate code
Resiliency & Recoverability code
Configuration & Bootstrap code
This is not
Business related code
Business Oriented Architecture
Resilient Messaging
Declarative Configuration
Building Blocks
Business Oriented Code
Messaging
“Object oriented programming, gets people to focus on the lesser idea.
The big idea is Messaging."
~ Alan Kay
Messaging is communication
Message is data record
Command Messages
Event Messages
Sending Messages
Handling Messages
- Storing Order in database
Placing order flow
- Sending confirmation e-mail to the customer with the order’s summary
- Starting delivery process by calling a Shipping Service over HTTP API
Non Message-Driven Architecture
Non-Message Driven Architecture
Resilient Messaging
Message-Driven Architecture
Subscribing to Order Was Placed
"asynchronous_messages"
Queue
Setting up asynchronous channel
RabbitMQ Channel
Amazon SQS Channel
Redis Channel
Database Channel
Symfony Messenger Transport Channel
Data consistency
Outbox Pattern
Keep it within transaction
Handle each message in full isolation
Let it self-heal
Secure the Error Message
Recover Business Flow
bin/console ecotone:deadletter:replay dc4dfdb0-40aa-42f2-930d-8ca13dab3466
Manage Multiple Applications
- Ecotone Pulse
One more important ingredient: Tracing
- Sharing knowledge about high level overview of the system
- Tracing which point of the flow had stopped or failed
- What is the performance at each state of the flow
When failure happens recover fast
Resilient Messaging
Questions and Workshop
(Open in separate IDE)
What happens under the hood?
- Sending and Consumption retries
- Message Isolation
- DLQ and message replays
- Sending and Consuming from RabbitMQ
- Message Payload Conversion
- Message deduplication
- Connecting Event Handlers
- Queue creation
- Queue routings
Integration & Boilerplate code
Resiliency & recoverability code
Configuration & Bootstrap code
Building Blocks
Prepare the exercise
Building Blocks in Ecotone
Command/Event/Query Handlers
Aggregates / Sagas
Event Sourcing Projections
Much of technical code
Orchestration
Introduce Aggregate
Repository
API stays the same
Actions on Aggregate
Routing based Actions
Aggregates subscribing to Events
Orchestration
Get rid of orchestration
Routing based Events
Avoiding Manual Transformations
With bad architecture,
don't expect Domain focus
With good architecture,
Domain comes forward naturally
Building Blocks
Questions and Workshop
(Open in separate IDE)
What we achieved?
- Is done by used messaging
- Aggregates can be connect
to Messaging directly in a POPO way
Integration & Boilerplate code
Resiliency & recoverability code
Configuration & Bootstrap code
- Application/Service layer can be removed
- Events can be recorded in Aggregate
- Building Blocks can be connected seamlessly
Testing
Messaging
Prepare the exercise
Rules of maintainable tests
Isolate tested flow
Keep tests close to production
like run
Test business use case
1. Isolate tested flows
Bootstrap Ecotone Lite
Executing Test Scenario
2. Test business use case
All starts at API level
- Aggregates are our API
- Messages are our API
Testing Messaging Aggregates
Testing Aggregate API
3. Keep tests close to production run
Synchronous Actions
Asynchronous Actions
More Production like using real Async
Sending and Consuming from Message Channel (Queue)
Message Serialization and Deserialization
Integration with Message Broker
Full Asynchronous Test
Higher Level Abstraction Testing
Testing Messaging
Questions and Workshop
What we achieved?
- Is done and tested in Messaging
- Bootstraping and configuration happens in Ecotone Lite
Integration & Boilerplate code
Resiliency & recoverability code
Configuration & Bootstrap code
- Integration is production like done by Ecotone
- We reduce boilerplate to minimum as Ecotone provides sensible defaults
Thank you
Tips, Tricks and Features
Start small with your current code base
Integrates with Symfony and Laravel
Can be used stand-alone or with any other framework with Ecotone Lite
Can be introduced for
single feature first
Message Headers (Metadata)
Message Consumer Deduplication
Consume Message
from Message Broker
Handle Message
Acknowledge Message
in Message Broker
Consume Message
from Message Broker
Acknowledge Message
in Message Broker
Message Handler Deduplication
Interceptors
Interceptors Pointcuts
Custom Attribute Pointcut
Interceptor Types
Presend
Before
Around
After
Schedulers
Doctrine ORM Repository
Inbuilt Repositories
Eloquent Repository
Prooph Event Sourcing Repository
Document Store Repository
Storing Aggregates
Projections
Questions?
Ecotone and Message-Driven Architcture - Nov 2023 PHPCon
By Dariusz Gafka