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Hexagonal pattern: Use Guice dependency injection

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This commit is contained in:
Ilkka Seppälä 2016-09-06 22:39:39 +03:00
parent 348e577e8e
commit 1b10ddbb73
7 changed files with 152 additions and 25 deletions
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11
hexagonal/src/main/java/com/iluwatar/hexagonal/App.java
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@ -26,15 +26,15 @@ import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.iluwatar.hexagonal.administration.LotteryAdministration;
import com.iluwatar.hexagonal.administration.LotteryAdministrationImpl;
import com.iluwatar.hexagonal.banking.WireTransfersImpl;
import com.iluwatar.hexagonal.domain.LotteryConstants;
import com.iluwatar.hexagonal.domain.LotteryNumbers;
import com.iluwatar.hexagonal.domain.LotteryTicket;
import com.iluwatar.hexagonal.domain.PlayerDetails;
import com.iluwatar.hexagonal.service.LotteryService;
import com.iluwatar.hexagonal.service.LotteryServiceImpl;
/**
*
@ -124,12 +124,15 @@ public class App {
* Program entry point
*/
public static void main(String[] args) {
Injector injector = Guice.createInjector(new LotteryModule());
// start new lottery round
LotteryAdministration administartion = new LotteryAdministrationImpl();
LotteryAdministration administartion = injector.getInstance(LotteryAdministration.class);
administartion.resetLottery();
// submit some lottery tickets
LotteryServiceImpl service = new LotteryServiceImpl();
LotteryService service = injector.getInstance(LotteryService.class);
submitTickets(service, 20);
// perform lottery

52
hexagonal/src/main/java/com/iluwatar/hexagonal/LotteryModule.java Normal file
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@ -0,0 +1,52 @@
/**
* The MIT License
* Copyright (c) 2014 Ilkka Seppälä
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.iluwatar.hexagonal;
import com.google.inject.AbstractModule;
import com.iluwatar.hexagonal.administration.LotteryAdministration;
import com.iluwatar.hexagonal.administration.LotteryAdministrationImpl;
import com.iluwatar.hexagonal.banking.WireTransfers;
import com.iluwatar.hexagonal.banking.WireTransfersImpl;
import com.iluwatar.hexagonal.database.LotteryTicketInMemoryRepository;
import com.iluwatar.hexagonal.database.LotteryTicketRepository;
import com.iluwatar.hexagonal.domain.LotterySystem;
import com.iluwatar.hexagonal.domain.LotterySystemImpl;
import com.iluwatar.hexagonal.notifications.LotteryNotifications;
import com.iluwatar.hexagonal.notifications.LotteryNotificationsImpl;
import com.iluwatar.hexagonal.service.LotteryService;
import com.iluwatar.hexagonal.service.LotteryServiceImpl;
/**
* Guice module for binding production dependencies
*/
public class LotteryModule extends AbstractModule {
@Override
protected void configure() {
bind(LotteryTicketRepository.class).to(LotteryTicketInMemoryRepository.class);
bind(LotterySystem.class).to(LotterySystemImpl.class);
bind(LotteryNotifications.class).to(LotteryNotificationsImpl.class);
bind(WireTransfers.class).to(WireTransfersImpl.class);
bind(LotteryAdministration.class).to(LotteryAdministrationImpl.class);
bind(LotteryService.class).to(LotteryServiceImpl.class);
}
}

7
hexagonal/src/main/java/com/iluwatar/hexagonal/administration/LotteryAdministrationImpl.java
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@ -22,9 +22,9 @@
*/
package com.iluwatar.hexagonal.administration;
import com.google.inject.Inject;
import com.iluwatar.hexagonal.domain.LotteryNumbers;
import com.iluwatar.hexagonal.domain.LotterySystem;
import com.iluwatar.hexagonal.domain.LotterySystemImpl;
import com.iluwatar.hexagonal.domain.LotteryTicket;
import com.iluwatar.hexagonal.domain.LotteryTicketId;
@ -39,8 +39,9 @@ public class LotteryAdministrationImpl implements LotteryAdministration {
private final LotterySystem lotterySystem;
public LotteryAdministrationImpl() {
lotterySystem = new LotterySystemImpl();
@Inject
public LotteryAdministrationImpl(LotterySystem lotterySystem) {
this.lotterySystem = lotterySystem;
}
@Override

27
hexagonal/src/main/java/com/iluwatar/hexagonal/domain/LotterySystemImpl.java
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@ -22,12 +22,10 @@
*/
package com.iluwatar.hexagonal.domain;
import com.google.inject.Inject;
import com.iluwatar.hexagonal.banking.WireTransfers;
import com.iluwatar.hexagonal.banking.WireTransfersImpl;
import com.iluwatar.hexagonal.database.LotteryTicketInMemoryRepository;
import com.iluwatar.hexagonal.database.LotteryTicketRepository;
import com.iluwatar.hexagonal.notifications.LotteryNotifications;
import com.iluwatar.hexagonal.notifications.LotteryNotificationsImpl;
import java.util.Map;
import java.util.Optional;
@ -38,11 +36,18 @@ import java.util.Optional;
public class LotterySystemImpl implements LotterySystem {
private final LotteryTicketRepository repository;
private final LotteryNotifications notifications = new LotteryNotificationsImpl();
private final WireTransfers bank = new WireTransfersImpl();
private final LotteryNotifications notifications;
private final WireTransfers wireTransfers;
public LotterySystemImpl() {
repository = new LotteryTicketInMemoryRepository();
/**
* Constructor
*/
@Inject
public LotterySystemImpl(LotteryTicketRepository repository, LotteryNotifications notifications,
WireTransfers wireTransfers) {
this.repository = repository;
this.notifications = notifications;
this.wireTransfers = wireTransfers;
}
@Override
@ -57,8 +62,8 @@ public class LotterySystemImpl implements LotterySystem {
for (LotteryTicketId id : tickets.keySet()) {
LotteryTicketCheckResult result = checkTicketForPrize(id, numbers);
if (result.getResult().equals(LotteryTicketCheckResult.CheckResult.WIN_PRIZE)) {
boolean transferred = bank.transferFunds(LotteryConstants.PRIZE_AMOUNT, LotteryConstants.SERVICE_BANK_ACCOUNT,
tickets.get(id).getPlayerDetails().getBankAccount());
boolean transferred = wireTransfers.transferFunds(LotteryConstants.PRIZE_AMOUNT,
LotteryConstants.SERVICE_BANK_ACCOUNT, tickets.get(id).getPlayerDetails().getBankAccount());
if (transferred) {
notifications.notifyPrize(tickets.get(id).getPlayerDetails(), LotteryConstants.PRIZE_AMOUNT);
} else {
@ -78,8 +83,8 @@ public class LotterySystemImpl implements LotterySystem {
@Override
public Optional<LotteryTicketId> submitTicket(LotteryTicket ticket) {
boolean result = bank.transferFunds(LotteryConstants.TICKET_PRIZE, ticket.getPlayerDetails().getBankAccount(),
LotteryConstants.SERVICE_BANK_ACCOUNT);
boolean result = wireTransfers.transferFunds(LotteryConstants.TICKET_PRIZE,
ticket.getPlayerDetails().getBankAccount(), LotteryConstants.SERVICE_BANK_ACCOUNT);
if (result == false) {
notifications.notifyTicketSubmitError(ticket.getPlayerDetails());
return Optional.empty();

7
hexagonal/src/main/java/com/iluwatar/hexagonal/service/LotteryServiceImpl.java
View File

@ -22,9 +22,9 @@
*/
package com.iluwatar.hexagonal.service;
import com.google.inject.Inject;
import com.iluwatar.hexagonal.domain.LotteryNumbers;
import com.iluwatar.hexagonal.domain.LotterySystem;
import com.iluwatar.hexagonal.domain.LotterySystemImpl;
import com.iluwatar.hexagonal.domain.LotteryTicket;
import com.iluwatar.hexagonal.domain.LotteryTicketCheckResult;
import com.iluwatar.hexagonal.domain.LotteryTicketId;
@ -43,8 +43,9 @@ public class LotteryServiceImpl implements LotteryService {
/**
* Constructor
*/
public LotteryServiceImpl() {
lotterySystem = new LotterySystemImpl();
@Inject
public LotteryServiceImpl(LotterySystem lotterySystem) {
this.lotterySystem = lotterySystem;
}
@Override

52
hexagonal/src/test/java/com/iluwatar/hexagonal/LotteryTestingModule.java Normal file
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@ -0,0 +1,52 @@
/**
* The MIT License
* Copyright (c) 2014 Ilkka Seppälä
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.iluwatar.hexagonal;
import com.google.inject.AbstractModule;
import com.iluwatar.hexagonal.administration.LotteryAdministration;
import com.iluwatar.hexagonal.administration.LotteryAdministrationImpl;
import com.iluwatar.hexagonal.banking.WireTransfers;
import com.iluwatar.hexagonal.banking.WireTransfersImpl;
import com.iluwatar.hexagonal.database.LotteryTicketInMemoryRepository;
import com.iluwatar.hexagonal.database.LotteryTicketRepository;
import com.iluwatar.hexagonal.domain.LotterySystem;
import com.iluwatar.hexagonal.domain.LotterySystemImpl;
import com.iluwatar.hexagonal.notifications.LotteryNotifications;
import com.iluwatar.hexagonal.notifications.LotteryNotificationsImpl;
import com.iluwatar.hexagonal.service.LotteryService;
import com.iluwatar.hexagonal.service.LotteryServiceImpl;
/**
* Guice module for testing dependencies
*/
public class LotteryTestingModule extends AbstractModule {
@Override
protected void configure() {
bind(LotteryTicketRepository.class).to(LotteryTicketInMemoryRepository.class);
bind(LotterySystem.class).to(LotterySystemImpl.class);
bind(LotteryNotifications.class).to(LotteryNotificationsImpl.class);
bind(WireTransfers.class).to(WireTransfersImpl.class);
bind(LotteryAdministration.class).to(LotteryAdministrationImpl.class);
bind(LotteryService.class).to(LotteryServiceImpl.class);
}
}

21
hexagonal/src/test/java/com/iluwatar/hexagonal/domain/LotteryTest.java
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@ -30,6 +30,11 @@ import java.util.HashSet;
import java.util.Map;
import java.util.Optional;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.iluwatar.hexagonal.LotteryModule;
import com.iluwatar.hexagonal.LotteryTestingModule;
import com.iluwatar.hexagonal.domain.*;
import org.junit.Before;
import org.junit.Test;
@ -48,11 +53,19 @@ import com.iluwatar.hexagonal.test.LotteryTestUtils;
*/
public class LotteryTest {
private final LotterySystem lotterySystem = new LotterySystemImpl();
private final WireTransfers wireTransfers = new WireTransfersImpl();
private Injector injector;
@Inject
private LotterySystem lotterySystem;
@Inject
private WireTransfers wireTransfers;
public LotteryTest() {
this.injector = Guice.createInjector(new LotteryTestingModule());
}
@Before
public void clear() {
public void setup() {
injector.injectMembers(this);
// add funds to the test player's bank account
wireTransfers.setFunds("123-12312", 100);
}