first pair code
This commit is contained in:
akeshri
parent
976862de1a
commit
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/**
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*
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*/
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package com.baeldung.collections.mapfirstpair;
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import java.util.Map;
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/**
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* @author ASHWINI
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*
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*/
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public interface MapFirstPairService {
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<K, V> Map.Entry<K, V> getFirstPairUsingIterator(Map<K, V> map);
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<K, V> Map.Entry<K, V> getFirstPairUsingStream(Map<K, V> map);
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}
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/**
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*
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*/
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package com.baeldung.collections.mapfirstpair;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Set;
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/**
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* @author ASHWINI
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*
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*/
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public class MapFirstPairServiceImpl implements MapFirstPairService {
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public <K, V> Map.Entry<K, V> getFirstPairUsingIterator(Map<K, V> map) {
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if (map == null || map.size() == 0)
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return null;
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Iterator<Map.Entry<K, V>> iterator = map.entrySet()
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.iterator();
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if (iterator.hasNext())
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return iterator.next();
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return null;
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}
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public <K, V> Map.Entry<K, V> getFirstPairUsingStream(Map<K, V> map) {
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if (map == null || map.size() == 0)
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return null;
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Set<Map.Entry<K, V>> entrySet = map.entrySet();
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return entrySet.stream()
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.findFirst()
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.get();
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}
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}
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@ -0,0 +1,125 @@
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package com.baeldung.collections.mapfirstpair;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotEquals;
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import java.util.AbstractMap;
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import java.util.HashMap;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import org.junit.Before;
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import org.junit.Test;
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public class MapFirstPairServiceUnitTest {
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private MapFirstPairService mapFirstPairService;
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@Before
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public void Setup() {
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mapFirstPairService = new MapFirstPairServiceImpl();
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}
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private void populateMapValues(Map<Integer, String> map) {
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if (map != null) {
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map.put(5, "A");
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map.put(1, "B");
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map.put(2, "C");
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}
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}
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@Test
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public void whenUsingIteratorForHashMap() {
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Map<Integer, String> hashMap = new HashMap<>();
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populateMapValues(hashMap);
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingIterator(hashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(1, "B");
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Map.Entry<Integer, String> pairInsertedFirst = new AbstractMap.SimpleEntry<Integer, String>(5, "A");
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assertEquals(expectedValue, actualValue);
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assertNotEquals(pairInsertedFirst, actualValue);
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}
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@Test
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public void whenUsingStreamForHashMap() {
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Map<Integer, String> hashMap = new HashMap<>();
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populateMapValues(hashMap);
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingStream(hashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(1, "B");
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Map.Entry<Integer, String> pairInsertedFirst = new AbstractMap.SimpleEntry<Integer, String>(5, "A");
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assertEquals(expectedValue, actualValue);
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assertNotEquals(pairInsertedFirst, actualValue);
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}
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@Test
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public void whenUsingIteratorForLinkedHashMap() {
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Map<Integer, String> linkedHashMap = new LinkedHashMap<>();
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populateMapValues(linkedHashMap);
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingIterator(linkedHashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(5, "A");
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assertEquals(expectedValue, actualValue);
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}
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@Test
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public void whenUsingStreamForLinkedHashMap() {
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Map<Integer, String> linkedHashMap = new LinkedHashMap<>();
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populateMapValues(linkedHashMap);
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingStream(linkedHashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(5, "A");
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assertEquals(expectedValue, actualValue);
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}
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@Test
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public void whenAddedAnElementInHashMap_thenFirstPairChangedUsingIterator() {
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Map<Integer, String> hashMap = new HashMap<>();
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populateMapValues(hashMap);
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hashMap.put(0, "D");
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingIterator(hashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(0, "D");
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assertEquals(expectedValue, actualValue);
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}
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@Test
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public void whenAddedAnElementInHashMap_thenFirstPairChangedUsingStream() {
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Map<Integer, String> hashMap = new HashMap<>();
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populateMapValues(hashMap);
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hashMap.put(0, "D");
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingStream(hashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(0, "D");
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assertEquals(expectedValue, actualValue);
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}
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@Test
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public void whenAddedAnElementInLinkedHashMap_thenFirstPairRemainUnchangedUsingIterator() {
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Map<Integer, String> linkedHashMap = new LinkedHashMap<>();
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populateMapValues(linkedHashMap);
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linkedHashMap.put(0, "D");
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingIterator(linkedHashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(5, "A");
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assertEquals(expectedValue, actualValue);
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}
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@Test
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public void whenAddedAnElementInLinkedHashMap_thenFirstPairRemainUnchangedUsingStream() {
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Map<Integer, String> linkedHashMap = new LinkedHashMap<>();
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populateMapValues(linkedHashMap);
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linkedHashMap.put(0, "D");
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Map.Entry<Integer, String> actualValue = mapFirstPairService.getFirstPairUsingStream(linkedHashMap);
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Map.Entry<Integer, String> expectedValue = new AbstractMap.SimpleEntry<Integer, String>(5, "A");
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assertEquals(expectedValue, actualValue);
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}
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}
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@ -1,17 +0,0 @@
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# Hexagonal Architecture
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A quick and practical example of Hexagonal Architecture using Spring boot.
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This application is using h2 database,which can be accessible http:/localhost:8080/h2
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Main Application schema : hexagonal
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Test Application Schema : hexagonal_test
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1. Rest Api : execute [App](https://github.com/akeshri/tutorials/blob/master/hexagonal-architecture/src/main/java/com/baeldung/hexagonal/architecture/App.java)
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- Get All products : http://localhost:8080/api/v1/product/all
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- Get product by id : http://localhost:8080/api/v1/product/{productId}
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- Add a product : http://localhost:8080/api/v1/product/add
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For more detail refer [ProductController](https://github.com/akeshri/tutorials/blob/master/hexagonal-architecture/src/main/java/com/baeldung/hexagonal/architecture/controller/ProductController.java)
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2. Batch processing : We need to configure active profile as batch i.e. -Dspring.profiles.active=batch and execute [ConsoleApp](https://github.com/akeshri/tutorials/blob/master/hexagonal-architecture/src/main/java/com/baeldung/hexagonal/architecture/ConsoleApp.java)
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3. Test case : [ProductServiceTest](https://github.com/akeshri/tutorials/blob/master/hexagonal-architecture/src/test/java/com/baeldung/hexagonal/architecture/service/ProductServiceTest.java)
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.article</groupId>
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<artifactId>hexagonal-architecture</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>jar</packaging>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>1.3.1.RELEASE</version>
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</parent>
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<name>hexagonal-architecture</name>
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<url>http://maven.apache.org</url>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<maven.compiler.target>1.8</maven.compiler.target>
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<maven.compiler.source>1.8</maven.compiler.source>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-jpa</artifactId>
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</dependency>
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<dependency>
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<groupId>com.h2database</groupId>
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<artifactId>h2</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.dataformat</groupId>
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<artifactId>jackson-dataformat-csv</artifactId>
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</dependency>
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</dependencies>
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</project>
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package com.baeldung.hexagonal.architecture;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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/**
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* @author AshwiniKeshri
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*
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*/
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@SpringBootApplication
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public class App {
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public static void main(String[] args) {
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SpringApplication.run(App.class, args);
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}
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}
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package com.baeldung.hexagonal.architecture;
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import java.io.File;
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import java.util.List;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration;
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import org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration;
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import com.baeldung.hexagonal.architecture.model.Product;
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import com.baeldung.hexagonal.architecture.service.ProductService;
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import com.fasterxml.jackson.dataformat.csv.CsvMapper;
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import com.fasterxml.jackson.dataformat.csv.CsvSchema;
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/**
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* @author AshwiniKeshri
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*
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*/
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@SpringBootApplication(exclude = { EmbeddedServletContainerAutoConfiguration.class, WebMvcAutoConfiguration.class })
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public class ConsoleApp implements CommandLineRunner {
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@Autowired
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private ProductService productService;
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public static void main(String[] args) {
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SpringApplication.run(ConsoleApp.class, args);
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}
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@Override
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public void run(String... args) throws Exception {
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String filePath = "";
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if (args != null && args.length == 2 && "Product".equalsIgnoreCase(args[0]) && (filePath = args[1]).length() > 0) {
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File sourceFile = new File(filePath);
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if (sourceFile.exists()) {
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CsvMapper mapper = new CsvMapper();
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List<Product> products = mapper.readerFor(Product.class)
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.with(CsvSchema.emptySchema()
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.withHeader())
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.<Product> readValues(sourceFile)
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.readAll();
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productService.saveAll(products);
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}
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}
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}
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}
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package com.baeldung.hexagonal.architecture.controller;
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import java.util.List;
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import java.util.stream.Collectors;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.RestController;
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import com.baeldung.hexagonal.architecture.dtos.ProductDto;
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import com.baeldung.hexagonal.architecture.model.Product;
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import com.baeldung.hexagonal.architecture.service.ProductService;
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/**
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* @author AshwiniKeshri
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*
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*/
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@RestController
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@RequestMapping("api/v1/product")
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public class ProductController {
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@Autowired
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private ProductService productService;
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@RequestMapping(value = "/all", method = RequestMethod.GET)
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public List<ProductDto> list() {
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return productService.findAll()
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.stream()
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.map(p -> new ProductDto(p))
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.collect(Collectors.toList());
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}
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@RequestMapping(value = "/{productId}", method = RequestMethod.GET)
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public ProductDto get(@PathVariable long productId) {
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Product p = productService.findById(productId);
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return p != null ? new ProductDto(p) : null;
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}
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@RequestMapping(value = "/add", method = RequestMethod.POST)
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public ProductDto create(@RequestBody ProductDto product) {
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Product p = new Product();
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p.setDescription(product.getDescription());
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p.setName(product.getName());
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p.setPrice(product.getPrice());
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p.setQuantity(product.getQuantity());
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Long id = productService.create(p);
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product.setId(id);
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return product;
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}
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}
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package com.baeldung.hexagonal.architecture.dtos;
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import com.baeldung.hexagonal.architecture.model.Product;
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/**
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* @author AshwiniKeshri
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*
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*/
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public class ProductDto {
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private Long id;
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private String name;
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private Long quantity;
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private Double price;
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private String description;
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public ProductDto() {
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}
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public ProductDto(Product product) {
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this.description = product.getDescription();
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this.id = product.getId();
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this.name = product.getName();
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this.price = product.getPrice();
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this.quantity = product.getQuantity();
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}
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Long getQuantity() {
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return quantity;
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}
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public void setQuantity(Long quantity) {
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this.quantity = quantity;
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}
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public Double getPrice() {
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return price;
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}
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public void setPrice(Double price) {
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this.price = price;
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}
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public String getDescription() {
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return description;
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}
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public void setDescription(String description) {
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this.description = description;
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}
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}
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/**
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*
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*/
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package com.baeldung.hexagonal.architecture.model;
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import java.io.Serializable;
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import javax.persistence.Column;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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import javax.persistence.Table;
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/**
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* @author AshwiniKeshri
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*
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*/
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@Entity
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@Table(name = "PRODUCT")
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public class Product implements Serializable {
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/**
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*
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*/
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private static final long serialVersionUID = 4000353732860709995L;
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@Id
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@GeneratedValue(strategy = GenerationType.AUTO)
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private Long id;
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@Column(name = "NAME")
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private String name;
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@Column(name = "QUANTITY")
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private Long quantity;
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@Column(name = "PRICE")
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private Double price;
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@Column(name = "DESCRIPTION")
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private String description;
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public Long getId() {
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return id;
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}
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public void setId(Long id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public Long getQuantity() {
|
||||
return quantity;
|
||||
}
|
||||
|
||||
public void setQuantity(Long quantity) {
|
||||
this.quantity = quantity > 0 ? quantity : 0;
|
||||
}
|
||||
|
||||
public Double getPrice() {
|
||||
return price;
|
||||
}
|
||||
|
||||
public void setPrice(Double price) {
|
||||
this.price = price == null ? 0.0 : price;
|
||||
}
|
||||
|
||||
public String getDescription() {
|
||||
return description;
|
||||
}
|
||||
|
||||
public void setDescription(String description) {
|
||||
this.description = description;
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,14 +0,0 @@
|
||||
package com.baeldung.hexagonal.architecture.repository;
|
||||
|
||||
import org.springframework.data.jpa.repository.JpaRepository;
|
||||
|
||||
import com.baeldung.hexagonal.architecture.model.Product;
|
||||
|
||||
/**
|
||||
* @author AshwiniKeshri
|
||||
*
|
||||
*/
|
||||
|
||||
public interface ProductRepository extends JpaRepository<Product, Long> {
|
||||
|
||||
}
|
||||
@ -1,21 +0,0 @@
|
||||
package com.baeldung.hexagonal.architecture.service;
|
||||
|
||||
import java.util.List;
|
||||
|
||||
import com.baeldung.hexagonal.architecture.model.Product;
|
||||
|
||||
/**
|
||||
* @author AshwiniKeshri
|
||||
*
|
||||
*/
|
||||
|
||||
public interface ProductService {
|
||||
|
||||
List<Product> findAll();
|
||||
|
||||
Product findById(long id);
|
||||
|
||||
Long create(Product product);
|
||||
|
||||
void saveAll(List<Product> products);
|
||||
}
|
||||
@ -1,44 +0,0 @@
|
||||
package com.baeldung.hexagonal.architecture.service;
|
||||
|
||||
import java.util.List;
|
||||
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
import org.springframework.beans.factory.annotation.Autowired;
|
||||
import org.springframework.stereotype.Service;
|
||||
|
||||
import com.baeldung.hexagonal.architecture.model.Product;
|
||||
import com.baeldung.hexagonal.architecture.repository.ProductRepository;
|
||||
|
||||
/**
|
||||
* @author AshwiniKeshri
|
||||
*
|
||||
*/
|
||||
|
||||
@Service
|
||||
public class ProductServiceImpl implements ProductService {
|
||||
|
||||
private Logger logger = LoggerFactory.getLogger(ProductServiceImpl.class);
|
||||
|
||||
@Autowired
|
||||
private ProductRepository productRepository;
|
||||
|
||||
public List<Product> findAll() {
|
||||
return productRepository.findAll();
|
||||
}
|
||||
|
||||
public Product findById(long id) {
|
||||
return productRepository.findOne(id);
|
||||
}
|
||||
|
||||
public Long create(Product product) {
|
||||
product = productRepository.saveAndFlush(product);
|
||||
return product.getId();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void saveAll(List<Product> products) {
|
||||
productRepository.save(products);
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,9 +0,0 @@
|
||||
spring.main.web-environment=false
|
||||
spring.jpa.hibernate.ddl-auto=false;
|
||||
spring.h2.console.enabled=true
|
||||
spring.h2.console.path=/h2
|
||||
|
||||
spring.datasource.url=jdbc:h2:file:~/hexagonal
|
||||
spring.datasource.username=sa
|
||||
spring.datasource.password=
|
||||
spring.datasource.driver-class-name=org.h2.Driver
|
||||
@ -1,8 +0,0 @@
|
||||
spring.jpa.hibernate.ddl-auto=false;
|
||||
spring.h2.console.enabled=true
|
||||
spring.h2.console.path=/h2
|
||||
|
||||
spring.datasource.url=jdbc:h2:file:~/hexagonal_test
|
||||
spring.datasource.username=sa
|
||||
spring.datasource.password=
|
||||
spring.datasource.driver-class-name=org.h2.Driver
|
||||
@ -1,8 +0,0 @@
|
||||
spring.jpa.hibernate.ddl-auto=false;
|
||||
spring.h2.console.enabled=true
|
||||
spring.h2.console.path=/h2
|
||||
|
||||
spring.datasource.url=jdbc:h2:file:~/hexagonal
|
||||
spring.datasource.username=sa
|
||||
spring.datasource.password=
|
||||
spring.datasource.driver-class-name=org.h2.Driver
|
||||
@ -1,9 +0,0 @@
|
||||
CREATE TABLE PRODUCT(
|
||||
ID INT AUTO_INCREMENT,
|
||||
NAME VARCHAR(255),
|
||||
QUANTITY INTEGER,
|
||||
PRICE DOUBLE,
|
||||
DESCRIPTION VARCHAR(1000),
|
||||
);
|
||||
|
||||
INSERT INTO PRODUCT(NAME,QUANTITY,PRICE,DESCRIPTION) VALUES ('iPhone 11 Pro',10,300,'First triple camera system');
|
||||
@ -1,43 +0,0 @@
|
||||
/**
|
||||
*
|
||||
*/
|
||||
package com.baeldung.hexagonal.architecture.service;
|
||||
|
||||
import org.junit.Assert;
|
||||
import org.junit.Test;
|
||||
import org.junit.runner.RunWith;
|
||||
import org.springframework.beans.factory.annotation.Autowired;
|
||||
import org.springframework.boot.test.SpringApplicationConfiguration;
|
||||
import org.springframework.context.annotation.PropertySource;
|
||||
import org.springframework.context.annotation.PropertySources;
|
||||
import org.springframework.test.context.ActiveProfiles;
|
||||
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
|
||||
|
||||
import com.baeldung.hexagonal.architecture.App;
|
||||
import com.baeldung.hexagonal.architecture.model.Product;
|
||||
import com.baeldung.hexagonal.architecture.service.ProductService;
|
||||
|
||||
/**
|
||||
* @author AshwiniKeshri
|
||||
*
|
||||
*/
|
||||
@RunWith(SpringJUnit4ClassRunner.class)
|
||||
@SpringApplicationConfiguration(App.class)
|
||||
@ActiveProfiles(value = "test")
|
||||
public class ProductServiceTest {
|
||||
|
||||
@Autowired
|
||||
private ProductService productService;
|
||||
|
||||
@Test
|
||||
public void testCreateProduct() {
|
||||
Product product = new Product();
|
||||
product.setDescription("test product");
|
||||
product.setName("Product1");
|
||||
product.setPrice(10.0);
|
||||
product.setQuantity(100l);
|
||||
Long id = productService.create(product);
|
||||
Assert.assertTrue(id > 0);
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user