-
-
Save abruzzi/b17d6a021b3347365f88a22de31dd149 to your computer and use it in GitHub Desktop.
BankAccount DCI example in Java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package org.kt3k.bankaccount; | |
| public class BankAccount { | |
| private String id; | |
| private Integer balance; | |
| public BankAccount(String id, Integer balance) { | |
| this.id = id; | |
| this.balance = balance; | |
| } | |
| public void increase(Integer money) { | |
| this.balance += money; | |
| } | |
| public void decrease(Integer money) { | |
| this.balance -= money; | |
| } | |
| public Integer getBalance() { | |
| return this.balance; | |
| } | |
| public String getId() { | |
| return this.id; | |
| } | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| apply plugin: 'java' | |
| repositories { | |
| mavenCentral() | |
| } | |
| dependencies { | |
| testCompile 'junit:junit:4.11' | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package org.kt3k.bankaccount; | |
| public class TransferContext { | |
| private BankAccountSender sender; | |
| private BankAccountReceiver receiver; | |
| public TransferContext(BankAccount sender, BankAccount receiver) { | |
| this.sender = new BankAccountSender(sender); | |
| this.receiver = new BankAccountReceiver(receiver); | |
| } | |
| static private class BankAccountSender { | |
| private BankAccount actor; | |
| public BankAccountSender(BankAccount actor) { | |
| this.actor = actor; | |
| } | |
| public void send(Integer money, BankAccountReceiver receiver) { | |
| this.actor.decrease(money); | |
| receiver.onReceive(money); | |
| } | |
| } | |
| static private class BankAccountReceiver { | |
| private BankAccount actor; | |
| public BankAccountReceiver(BankAccount actor) { | |
| this.actor = actor; | |
| } | |
| public void onReceive(Integer money) { | |
| this.actor.increase(money); | |
| } | |
| } | |
| public void transfer(Integer money) { | |
| this.sender.send(money, this.receiver); | |
| } | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package org.kt3k.bankaccount; | |
| import org.junit.Test; | |
| import static org.junit.Assert.*; | |
| public class TransferContextTest { | |
| @Test | |
| public void testTransfer() { | |
| BankAccount a = new BankAccount("abc123", 15000); | |
| BankAccount b = new BankAccount("def456", 25000); | |
| new TransferContext(a, b).transfer(5000); | |
| assertEquals((Integer)10000, a.getBalance()); | |
| assertEquals((Integer)30000, b.getBalance()); | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment