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Hexagonal pattern: Added Mongo based banking adapter and bound it in Guice production module

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This commit is contained in:
Ilkka Seppälä
2016-09-11 23:19:02 +03:00
parent 59e6a0af85
commit e685512ed5
5 changed files with 208 additions and 6 deletions
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134
hexagonal/src/main/java/com/iluwatar/hexagonal/banking/MongoBank.java Normal file
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@@ -0,0 +1,134 @@
/**
* 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.banking;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.model.UpdateOptions;
import org.bson.Document;
import java.util.ArrayList;
/**
* Mongo based banking adapter
*/
public class MongoBank implements WireTransfers {
private static final String DEFAULT_HOST = "localhost";
private static final int DEFAULT_PORT = 27017;
private static final String DEFAULT_DB = "lotteryDB";
private static final String DEFAULT_ACCOUNTS_COLLECTION = "accounts";
private MongoClient mongoClient;
private MongoDatabase database;
private MongoCollection<Document> accountsCollection;
/**
* Constructor
*/
public MongoBank() {
connect();
}
/**
* Constructor accepting parameters
*/
public MongoBank(String host, int port, String dbName, String accountsCollectionName) {
connect(host, port, dbName, accountsCollectionName);
}
/**
* Connect to database with default parameters
*/
public void connect() {
connect(DEFAULT_HOST, DEFAULT_PORT, DEFAULT_DB, DEFAULT_ACCOUNTS_COLLECTION);
}
/**
* Connect to database with given parameters
*/
public void connect(String host, int port, String dbName, String accountsCollectionName) {
if (mongoClient != null) {
mongoClient.close();
}
mongoClient = new MongoClient(host , port);
database = mongoClient.getDatabase(dbName);
accountsCollection = database.getCollection(accountsCollectionName);
}
/**
* @return mongo client
*/
public MongoClient getMongoClient() {
return mongoClient;
}
/**
*
* @return mongo database
*/
public MongoDatabase getMongoDatabase() {
return database;
}
/**
*
* @return accounts collection
*/
public MongoCollection<Document> getAccountsCollection() {
return accountsCollection;
}
@Override
public void setFunds(String bankAccount, int amount) {
Document search = new Document("_id", bankAccount);
Document update = new Document("_id", bankAccount).append("funds", amount);
accountsCollection.updateOne(search, new Document("$set", update), new UpdateOptions().upsert(true));
}
@Override
public int getFunds(String bankAccount) {
Document search = new Document("_id", bankAccount);
ArrayList<Document> results = accountsCollection.find(search).limit(1).into(new ArrayList<Document>());
if (results.size() > 0) {
return results.get(0).getInteger("funds");
} else {
return 0;
}
}
@Override
public boolean transferFunds(int amount, String sourceBackAccount, String destinationBankAccount) {
int sourceFunds = getFunds(sourceBackAccount);
if (sourceFunds < amount) {
return false;
} else {
int destFunds = getFunds(destinationBankAccount);
setFunds(sourceBackAccount, sourceFunds - amount);
setFunds(destinationBankAccount, destFunds + amount);
return true;
}
}
}

4
hexagonal/src/main/java/com/iluwatar/hexagonal/module/LotteryModule.java
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@@ -23,7 +23,7 @@
package com.iluwatar.hexagonal.module;
import com.google.inject.AbstractModule;
import com.iluwatar.hexagonal.banking.InMemoryBank;
import com.iluwatar.hexagonal.banking.MongoBank;
import com.iluwatar.hexagonal.banking.WireTransfers;
import com.iluwatar.hexagonal.database.LotteryTicketRepository;
import com.iluwatar.hexagonal.database.MongoTicketRepository;
@@ -38,6 +38,6 @@ public class LotteryModule extends AbstractModule {
protected void configure() {
bind(LotteryTicketRepository.class).to(MongoTicketRepository.class);
bind(LotteryNotifications.class).to(StdOutNotifications.class);
bind(WireTransfers.class).to(InMemoryBank.class);
bind(WireTransfers.class).to(MongoBank.class);
}
}

2
hexagonal/src/test/java/com/iluwatar/hexagonal/banking/WireTransfersTest.java → hexagonal/src/test/java/com/iluwatar/hexagonal/banking/InMemoryBankTest.java
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@@ -32,7 +32,7 @@ import org.junit.Test;
* Tests for banking
*
*/
public class WireTransfersTest {
public class InMemoryBankTest {
private final WireTransfers bank = new InMemoryBank();

68
hexagonal/src/test/java/com/iluwatar/hexagonal/banking/MongoBankTest.java Normal file
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@@ -0,0 +1,68 @@
/**
* 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.banking;
import com.mongodb.MongoClient;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
/**
* Tests for Mongo banking adapter
*/
@Ignore
public class MongoBankTest {
private static final String TEST_HOST = "localhost";
private static final int TEST_PORT = 27017;
private static final String TEST_DB = "lotteryDBTest";
private static final String TEST_ACCOUNTS_COLLECTION = "testAccounts";
private MongoBank mongoBank;
@Before
public void init() {
MongoClient mongoClient = new MongoClient(TEST_HOST, TEST_PORT);
mongoClient.dropDatabase(TEST_DB);
mongoClient.close();
mongoBank = new MongoBank(TEST_HOST, TEST_PORT, TEST_DB, TEST_ACCOUNTS_COLLECTION);
}
@Test
public void testSetup() {
assertEquals(0, mongoBank.getAccountsCollection().count());
}
@Test
public void testFundTransfers() {
assertEquals(0, mongoBank.getFunds("000-000"));
mongoBank.setFunds("000-000", 10);
assertEquals(10, mongoBank.getFunds("000-000"));
assertEquals(0, mongoBank.getFunds("111-111"));
mongoBank.transferFunds(9, "000-000", "111-111");
assertEquals(1, mongoBank.getFunds("000-000"));
assertEquals(9, mongoBank.getFunds("111-111"));
}
}

6
hexagonal/src/test/java/com/iluwatar/hexagonal/database/MongoTicketRepositoryTest.java
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@@ -44,9 +44,9 @@ public class MongoTicketRepositoryTest {
private static final String TEST_HOST = "localhost";
private static final int TEST_PORT = 27017;
private static final String TEST_DB = "lotteryDB";
private static final String TEST_TICKETS_COLLECTION = "lotteryTickets";
private static final String TEST_COUNTERS_COLLECTION = "counters";
private static final String TEST_DB = "lotteryTestDB";
private static final String TEST_TICKETS_COLLECTION = "lotteryTestTickets";
private static final String TEST_COUNTERS_COLLECTION = "testCounters";
private MongoTicketRepository repository;