![interface TicTacToePort {
markCell(x, y);
...
}
import javax.swing.JTextField;
AdapterUI implement TicTacToePort {
public markCell(row, column) {
textField[row][column].setText(‘X’);
}
}
CoreLogic() {
TicTacToePort ticTacToePort;
think() {
if …
ticTacToePort.markCell(row, column);
}
}
Tic tac toe
business logic](https://image.slidesharecdn.com/ybrnh1mxrtawkqpvt9o6-signature-3ba33e43740f5a7dcf1e8300bcc456de5978f7c73e9de170b4dbbe33e004c90e-poli-170406105506/85/Ports-and-Adapters-Architecture-18-320.jpg)
![interface TicTacToePort {
markCell(x, y);
...
}
import javax.swing.JTextField;
AdapterUI implement TicTacToePort {
public markCell(row, column) {
textField[row][column].setText(‘X’);
}
}
CoreLogic() {
TicTacToePort ticTacToePort;
think() {
if …
ticTacToePort.markCell(x, y);
}
}
Tic tac toe
port](https://image.slidesharecdn.com/ybrnh1mxrtawkqpvt9o6-signature-3ba33e43740f5a7dcf1e8300bcc456de5978f7c73e9de170b4dbbe33e004c90e-poli-170406105506/85/Ports-and-Adapters-Architecture-19-320.jpg)
![interface TicTacToePort {
markCell(row, column;
...
}
import javax.swing.JTextField;
AdapterUI implement TicTacToePort {
public markCell(row, column) {
textField[row][column].setText(‘X’);
}
}
CoreLogic() {
TicTacToePort ticTacToePort;
think() {
if …
ticTacToePort.markCell(x, y);
}
}
Tic tac toe
adapter](https://image.slidesharecdn.com/ybrnh1mxrtawkqpvt9o6-signature-3ba33e43740f5a7dcf1e8300bcc456de5978f7c73e9de170b4dbbe33e004c90e-poli-170406105506/85/Ports-and-Adapters-Architecture-20-320.jpg)
Ports and Adapters Architecture
- 1. Ports & Adapters Ofir Attal, Front End Developer linkedin/ofiratt github.com/ofiratt@Ofir_attalofira@wix.com
- 2. Hi. I am Ofir Attal, a Front End Developer Lithuania Ukraine Vilnius Kiev Dnipro Wix Engineering Locations Israel Tel-Aviv Be’er Sheva
- 4. the problem is Not writing code that works.
- 5. the problem is writing code that is easy to Modify.
- 6. ✔ Maintainable ✔ Scalable ✔ Easy to add / remove features to you need to understand that your code will change. Good code is:
- 10. hexagonal architecture Business Logic Technical Details Ports & Adaptors Ports & Adapters is an architecture, that prevents technical details from infiltrating the business logic.
- 11. MotorAdapterAirConditioner Motor +m: Motor +turnOn() +turnOFF() +motor: MotorAdapter +cool() +stop() +spinCW() +spinCCW() implementing the Adapter pattern Example ... if(roomTemp > desireeTemp) motor.turnOn(); ... ... motor.CCW(); ...
- 12. Business Logic Ports Interface - API The BL “knows it and only it” Adapters Implement the port Keep ‘em Thin! One for each external system
- 13. Business Logic Ports Interface - API The BL “knows it and only it” Adapters Implement the port Keep ‘em Thin! One for each external system
- 15. ▪ Prevent external dependencies from leaking into the code ▪ Anti-corruption layer ▪ They’re replaceable Business Logic how adaptors help you
- 16. Code Example 02
- 17. Tic tac toe let’s do it!
- 18. interface TicTacToePort { markCell(x, y); ... } import javax.swing.JTextField; AdapterUI implement TicTacToePort { public markCell(row, column) { textField[row][column].setText(‘X’); } } CoreLogic() { TicTacToePort ticTacToePort; think() { if … ticTacToePort.markCell(row, column); } } Tic tac toe business logic
- 19. interface TicTacToePort { markCell(x, y); ... } import javax.swing.JTextField; AdapterUI implement TicTacToePort { public markCell(row, column) { textField[row][column].setText(‘X’); } } CoreLogic() { TicTacToePort ticTacToePort; think() { if … ticTacToePort.markCell(x, y); } } Tic tac toe port
- 20. interface TicTacToePort { markCell(row, column; ... } import javax.swing.JTextField; AdapterUI implement TicTacToePort { public markCell(row, column) { textField[row][column].setText(‘X’); } } CoreLogic() { TicTacToePort ticTacToePort; think() { if … ticTacToePort.markCell(x, y); } } Tic tac toe adapter
- 23. Growing Object - Oriented Software, Guided By Tests. Nat Pryce Easy to classify incidents Business logic Technical details
- 24. Growing Object - Oriented Software, Guided By Tests. Nat Pryce Easy to test the BL in unit tests
- 25. Growing Object - Oriented Software, Guided By Tests. Nat Pryce Easy to validate assumptions in integration tests
- 26. OUR SOFTWARE WILL NEVER BE PERFECT.
- 27. public spinTheRolate(int userBetNumber) { Random rand; int rolateNumber = rand.nextInt(36); if(userBetNumber == rolateNumber) { system.print.out("user won"); } else { system.print.out("user lost"); } } code Violations
- 28. public spinTheRolate(int userBetNumber) { Random rand; int rolateNumber = rand.nextInt(36); if(userBetNumber == rolateNumber) { userNotifications.won(); } else { userNotifications.lost(); } } interface UserNotifications { public won(); public lost(); } UserNotificationUI implements UserNotifications { public won() { system.print.out("user won"); } public lost() { system.print.out("user lost"); } } code Violations
- 29. private getNewRolateBet() { Random rand; return rolateNumber = rand.nextInt(36); } public playUserBatFor(int userBetNumber) { if(userBetNumber == getNewRolateBet()) userNotifications.won(); else userNotifications.lost(); } interface UserNotifications { public won(); public lost(); } UserNotificationUI implements UserNotifications { public won() { system.print.out("user won"); } public lost() { system.print.out("user lost"); } } code Violations
- 30. 1. keep the BUsiness Logic clean! 2. Keep The adapter thin 2 takeaways for ports & adapters
- 31. http://wiki.c2.com/?HexagonalArchitecture http://wiki.c2.com/?PortsAndAdaptersArchitecture https://spin.atomicobject.com/2013/02/23/ports-adapters-software-architecture/ http://alistair.cockburn.us/Hexagonal+architecture http://www.natpryce.com/articles/000772.html https://cleancoders.com/videos/clean-code SOLID videos - https://cleancoders.com/videos/clean-code/solid-principles resources