Merge pull request hhimanshu#2 from hhimanshu/add-data

Added Liquibase Changesets, Entities and Tests

Author: hhimanshu

pom.xml

@@ -33,7 +33,10 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
-
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>
@@ -44,7 +47,7 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
-	</dependencies>
+  </dependencies>
 
 	<build>
 		<plugins>

src/main/java/com/hhimanshu/business/AuthorsManager.java

@@ -0,0 +1,23 @@
+package com.hhimanshu.business;
+
+import com.hhimanshu.persistence.entities.Author;
+import com.hhimanshu.persistence.repositories.AuthorRepository;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class AuthorsManager {
+
+  private AuthorRepository authorRepository;
+
+  @Autowired
+  public AuthorsManager(AuthorRepository authorRepository) {
+    this.authorRepository = authorRepository;
+  }
+
+  public Stream<Author> getAllAuthors() {
+    return StreamSupport.stream(authorRepository.findAll().spliterator(), true);
+  }
+}

src/main/java/com/hhimanshu/business/BooksManager.java

@@ -0,0 +1,23 @@
+package com.hhimanshu.business;
+
+import com.hhimanshu.persistence.entities.Book;
+import com.hhimanshu.persistence.repositories.BookRepository;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class BooksManager {
+
+  private BookRepository bookRepository;
+
+  @Autowired
+  public BooksManager(BookRepository bookRepository) {
+    this.bookRepository = bookRepository;
+  }
+
+  public Stream<Book> getAllBooks() {
+    return StreamSupport.stream(bookRepository.findAll().spliterator(), true);
+  }
+}

src/main/java/com/hhimanshu/persistence/entities/Author.java

@@ -0,0 +1,45 @@
+package com.hhimanshu.persistence.entities;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "authors")
+public class Author {
+
+  @Id
+  @GeneratedValue(strategy = GenerationType.AUTO)
+  private Integer id;
+
+  @Column(nullable = false, unique = true)
+  private String name;
+
+  protected Author() {
+    // for JPA
+  }
+
+  public Author(Integer id, String name) {
+    this.id = id;
+    this.name = name;
+  }
+
+  public Integer getId() {
+    return id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  @Override
+  public String toString() {
+    return "Author{" +
+        "id=" + id +
+        ", name='" + name + '\'' +
+        '}';
+  }
+}

src/main/java/com/hhimanshu/persistence/entities/Book.java

@@ -0,0 +1,57 @@
+package com.hhimanshu.persistence.entities;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "books")
+public class Book {
+
+  @Id
+  @GeneratedValue(strategy = GenerationType.AUTO)
+  private int id;
+
+  @Column(nullable = false, unique = true)
+  private String name;
+
+  @ManyToOne
+  @JoinColumn(name = "author")
+  private Author author;
+
+  protected Book() {
+    // for JPA
+  }
+
+  public Book(int id, String name, Author author) {
+    this.id = id;
+    this.name = name;
+    this.author = author;
+  }
+
+  public int getId() {
+    return id;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public Author getAuthor() {
+    return author;
+  }
+
+  @Override
+  public String toString() {
+    return "Book{" +
+        "id=" + id +
+        ", name='" + name + '\'' +
+        ", author=" + author +
+        '}';
+  }
+}

src/main/java/com/hhimanshu/persistence/repositories/AuthorRepository.java

@@ -0,0 +1,8 @@
+package com.hhimanshu.persistence.repositories;
+
+import com.hhimanshu.persistence.entities.Author;
+import org.springframework.data.repository.CrudRepository;
+
+public interface AuthorRepository extends CrudRepository<Author, Integer> {
+
+}

src/main/java/com/hhimanshu/persistence/repositories/BookRepository.java

@@ -0,0 +1,8 @@
+package com.hhimanshu.persistence.repositories;
+
+import com.hhimanshu.persistence.entities.Book;
+import org.springframework.data.repository.CrudRepository;
+
+public interface BookRepository extends CrudRepository<Book, Integer> {
+
+}

src/main/resources/application.properties

@@ -0,0 +1,3 @@
+spring.jpa.hibernate.ddl-auto=none
+spring.h2.console.enabled=true
+liquibase.change-log=classpath:db/liquibase-changelog.xml

src/main/resources/db/changelog/01-create-books-and-author-schema.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<databaseChangeLog
+  xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+         http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd">
+
+  <changeSet id="01" author="hhimanshu">
+    <createTable tableName="books"
+      remarks="A table to contain all books">
+      <column name="id" type="int">
+        <constraints nullable="false" unique="true" primaryKey="true"/>
+      </column>
+      <column name="name" type="varchar(255)">
+        <constraints nullable="false" unique="true"/>
+      </column>
+      <column name="author" type="int">
+        <constraints nullable="false"/>
+      </column>
+    </createTable>
+
+    <createTable tableName="authors"
+      remarks="A table to contain all the authors">
+      <column name="id" type="int">
+        <constraints nullable="false" primaryKey="true"/>
+      </column>
+      <column name="name" type="varchar(100)">
+        <constraints nullable="false"/>
+      </column>
+    </createTable>
+
+    <addForeignKeyConstraint baseTableName="books" baseColumnNames="author"
+      constraintName="author_fk"
+      referencedTableName="authors" referencedColumnNames="id"/>
+  </changeSet>
+</databaseChangeLog>

src/main/resources/db/changelog/02-insert-data-authors.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<databaseChangeLog
+  xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+         http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd">
+
+  <changeSet id="02" author="hhimanshu">
+    <comment>Inserting Authors</comment>
+    <insert tableName="authors">
+      <column name="id" valueNumeric="1"/>
+      <column name="name" value="author_01"/>
+    </insert>
+    <insert tableName="authors">
+      <column name="id" valueNumeric="2"/>
+      <column name="name" value="author_02"/>
+    </insert>
+    <insert tableName="authors">
+      <column name="id" valueNumeric="3"/>
+      <column name="name" value="author_03"/>
+    </insert>
+    <insert tableName="authors">
+      <column name="id" valueNumeric="4"/>
+      <column name="name" value="author_04"/>
+    </insert>
+    <insert tableName="authors">
+      <column name="id" valueNumeric="5"/>
+      <column name="name" value="author_05"/>
+    </insert>
+  </changeSet>
+</databaseChangeLog>

src/main/resources/db/changelog/02-insert-data-books.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<databaseChangeLog
+  xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+         http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd">
+
+  <changeSet id="03" author="hhimanshu">
+    <comment>Inserting Books</comment>
+    <insert tableName="books">
+      <column name="id" valueNumeric="1"/>
+      <column name="name" value="book_01_a_01"/>
+      <column name="author" valueNumeric="01"/>
+    </insert>
+    <insert tableName="books">
+      <column name="id" valueNumeric="2"/>
+      <column name="name" value="book_02_a_02"/>
+      <column name="author" valueNumeric="02"/>
+    </insert>
+    <insert tableName="books">
+      <column name="id" valueNumeric="3"/>
+      <column name="name" value="book_01_a_03"/>
+      <column name="author" valueNumeric="03"/>
+    </insert>
+    <insert tableName="books">
+      <column name="id" valueNumeric="4"/>
+      <column name="name" value="book_01_a_04"/>
+      <column name="author" valueNumeric="04"/>
+    </insert>
+    <insert tableName="books">
+      <column name="id" valueNumeric="5"/>
+      <column name="name" value="book_01_a_05"/>
+      <column name="author" valueNumeric="05"/>
+    </insert>
+  </changeSet>
+</databaseChangeLog>

src/main/resources/db/liquibase-changelog.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<databaseChangeLog
+  xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
+         http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd">
+
+  <include file="changelog/01-create-books-and-author-schema.xml" relativeToChangelogFile="true"/>
+  <include file="changelog/02-insert-data-authors.xml" relativeToChangelogFile="true"/>
+  <include file="changelog/02-insert-data-books.xml" relativeToChangelogFile="true"/>
+</databaseChangeLog>

src/test/java/com/hhimanshu/business/AuthorsManagerTest.java

@@ -0,0 +1,32 @@
+package com.hhimanshu.business;
+
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+
+import com.hhimanshu.persistence.entities.Author;
+import java.util.List;
+import java.util.stream.Collectors;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class AuthorsManagerTest {
+
+  @Autowired
+  private AuthorsManager authorsManager;
+
+  @Test
+  public void getAllAuthorsReturnDataFromDatabase() throws Exception {
+    List<Author> authors = authorsManager.getAllAuthors().collect(Collectors.toList());
+    assertFalse(authors.isEmpty());
+    assertEquals(5, authors.size());
+
+    // If you want to compare all the authors to what we inserted in '02-insert-data-authors.xml'
+    // authors.forEach(System.out::println);
+  }
+}

src/test/java/com/hhimanshu/business/BooksManagerTest.java

@@ -0,0 +1,32 @@
+package com.hhimanshu.business;
+
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+
+import com.hhimanshu.persistence.entities.Book;
+import java.util.List;
+import java.util.stream.Collectors;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class BooksManagerTest {
+
+  @Autowired
+  private BooksManager booksManager;
+
+  @Test
+  public void getAllBooksReturnsDataFromDatabase() throws Exception {
+    List<Book> books = booksManager.getAllBooks().collect(Collectors.toList());
+    assertFalse(books.isEmpty());
+    assertEquals(5, books.size());
+
+    // If you want to compare all the authors to what we inserted in '02-insert-data-authors.xml'
+    books.forEach(System.out::println);
+  }
+}