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Hexagonal pattern: Add separate class for Mongo connection properties

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This commit is contained in:
Ilkka Seppälä 2016-09-14 19:25:26 +03:00
parent e685512ed5
commit 27e8cb7f2d
5 changed files with 102 additions and 22 deletions
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14
hexagonal/src/main/java/com/iluwatar/hexagonal/banking/MongoBank.java
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@ -22,6 +22,7 @@
*/
package com.iluwatar.hexagonal.banking;
import com.iluwatar.hexagonal.mongo.MongoConnectionProperties;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
@ -35,8 +36,6 @@ import java.util.ArrayList;
*/
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";
@ -54,25 +53,26 @@ public class MongoBank implements WireTransfers {
/**
* Constructor accepting parameters
*/
public MongoBank(String host, int port, String dbName, String accountsCollectionName) {
connect(host, port, dbName, accountsCollectionName);
public MongoBank(String dbName, String accountsCollectionName) {
connect(dbName, accountsCollectionName);
}
/**
* Connect to database with default parameters
*/
public void connect() {
connect(DEFAULT_HOST, DEFAULT_PORT, DEFAULT_DB, DEFAULT_ACCOUNTS_COLLECTION);
connect(DEFAULT_DB, DEFAULT_ACCOUNTS_COLLECTION);
}
/**
* Connect to database with given parameters
*/
public void connect(String host, int port, String dbName, String accountsCollectionName) {
public void connect(String dbName, String accountsCollectionName) {
if (mongoClient != null) {
mongoClient.close();
}
mongoClient = new MongoClient(host , port);
MongoConnectionProperties properties = new MongoConnectionProperties().load();
mongoClient = new MongoClient(properties.getHost(), properties.getPort());
database = mongoClient.getDatabase(dbName);
accountsCollection = database.getCollection(accountsCollectionName);
}

14
hexagonal/src/main/java/com/iluwatar/hexagonal/database/MongoTicketRepository.java
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@ -26,6 +26,7 @@ import com.iluwatar.hexagonal.domain.LotteryNumbers;
import com.iluwatar.hexagonal.domain.LotteryTicket;
import com.iluwatar.hexagonal.domain.LotteryTicketId;
import com.iluwatar.hexagonal.domain.PlayerDetails;
import com.iluwatar.hexagonal.mongo.MongoConnectionProperties;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
@ -43,8 +44,6 @@ import java.util.Optional;
*/
public class MongoTicketRepository implements LotteryTicketRepository {
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_TICKETS_COLLECTION = "lotteryTickets";
private static final String DEFAULT_COUNTERS_COLLECTION = "counters";
@ -64,27 +63,28 @@ public class MongoTicketRepository implements LotteryTicketRepository {
/**
* Constructor accepting parameters
*/
public MongoTicketRepository(String host, int port, String dbName, String ticketsCollectionName,
public MongoTicketRepository(String dbName, String ticketsCollectionName,
String countersCollectionName) {
connect(host, port, dbName, ticketsCollectionName, countersCollectionName);
connect(dbName, ticketsCollectionName, countersCollectionName);
}
/**
* Connect to database with default parameters
*/
public void connect() {
connect(DEFAULT_HOST, DEFAULT_PORT, DEFAULT_DB, DEFAULT_TICKETS_COLLECTION, DEFAULT_COUNTERS_COLLECTION);
connect(DEFAULT_DB, DEFAULT_TICKETS_COLLECTION, DEFAULT_COUNTERS_COLLECTION);
}
/**
* Connect to database with given parameters
*/
public void connect(String host, int port, String dbName, String ticketsCollectionName,
public void connect(String dbName, String ticketsCollectionName,
String countersCollectionName) {
if (mongoClient != null) {
mongoClient.close();
}
mongoClient = new MongoClient(host , port);
MongoConnectionProperties properties = new MongoConnectionProperties().load();
mongoClient = new MongoClient(properties.getHost(), properties.getPort());
database = mongoClient.getDatabase(dbName);
ticketsCollection = database.getCollection(ticketsCollectionName);
countersCollection = database.getCollection(countersCollectionName);

80
hexagonal/src/main/java/com/iluwatar/hexagonal/mongo/MongoConnectionProperties.java Normal file
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@ -0,0 +1,80 @@
/**
* 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.mongo;
import java.io.FileInputStream;
import java.util.Properties;
/**
* Mongo connection properties
*/
public class MongoConnectionProperties {
private static final String DEFAULT_HOST = "localhost";
private static final int DEFAULT_PORT = 27017;
private String host;
private int port;
/**
* Constructor
*/
public MongoConnectionProperties() {
this.host = DEFAULT_HOST;
this.port = DEFAULT_PORT;
}
/**
* @return host name
*/
public String getHost() {
return host;
}
/**
* @return port number
*/
public int getPort() {
return port;
}
/**
* Try to load connection properties from file.
* Fall back to default connection properties.
*/
public MongoConnectionProperties load() {
String path = System.getProperty("hexagonal.properties.path");
Properties properties = new Properties();
if (path != null) {
try (FileInputStream fin = new FileInputStream(path)) {
properties.load(fin);
this.host = properties.getProperty("host");
this.port = Integer.parseInt(properties.getProperty("port"));
} catch (Exception e) {
// error occurred, use default properties
e.printStackTrace();
}
}
return this;
}
}

8
hexagonal/src/test/java/com/iluwatar/hexagonal/banking/MongoBankTest.java
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@ -22,6 +22,7 @@
*/
package com.iluwatar.hexagonal.banking;
import com.iluwatar.hexagonal.mongo.MongoConnectionProperties;
import com.mongodb.MongoClient;
import org.junit.Before;
import org.junit.Ignore;
@ -35,8 +36,6 @@ import static org.junit.Assert.assertEquals;
@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";
@ -44,10 +43,11 @@ public class MongoBankTest {
@Before
public void init() {
MongoClient mongoClient = new MongoClient(TEST_HOST, TEST_PORT);
MongoConnectionProperties properties = new MongoConnectionProperties().load();
MongoClient mongoClient = new MongoClient(properties.getHost(), properties.getPort());
mongoClient.dropDatabase(TEST_DB);
mongoClient.close();
mongoBank = new MongoBank(TEST_HOST, TEST_PORT, TEST_DB, TEST_ACCOUNTS_COLLECTION);
mongoBank = new MongoBank(TEST_DB, TEST_ACCOUNTS_COLLECTION);
}
@Test

8
hexagonal/src/test/java/com/iluwatar/hexagonal/database/MongoTicketRepositoryTest.java
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@ -26,6 +26,7 @@ import com.iluwatar.hexagonal.domain.LotteryNumbers;
import com.iluwatar.hexagonal.domain.LotteryTicket;
import com.iluwatar.hexagonal.domain.LotteryTicketId;
import com.iluwatar.hexagonal.domain.PlayerDetails;
import com.iluwatar.hexagonal.mongo.MongoConnectionProperties;
import com.mongodb.MongoClient;
import org.junit.Before;
import org.junit.Ignore;
@ -42,8 +43,6 @@ import static org.junit.Assert.assertTrue;
@Ignore
public class MongoTicketRepositoryTest {
private static final String TEST_HOST = "localhost";
private static final int TEST_PORT = 27017;
private static final String TEST_DB = "lotteryTestDB";
private static final String TEST_TICKETS_COLLECTION = "lotteryTestTickets";
private static final String TEST_COUNTERS_COLLECTION = "testCounters";
@ -52,10 +51,11 @@ public class MongoTicketRepositoryTest {
@Before
public void init() {
MongoClient mongoClient = new MongoClient(TEST_HOST, TEST_PORT);
MongoConnectionProperties properties = new MongoConnectionProperties().load();
MongoClient mongoClient = new MongoClient(properties.getHost(), properties.getPort());
mongoClient.dropDatabase(TEST_DB);
mongoClient.close();
repository = new MongoTicketRepository(TEST_HOST, TEST_PORT, TEST_DB, TEST_TICKETS_COLLECTION,
repository = new MongoTicketRepository(TEST_DB, TEST_TICKETS_COLLECTION,
TEST_COUNTERS_COLLECTION);
}