gupta.aashishrules@gmail.com - Hexagonal

gupta.aashishrules@gmail.com - Hexagonal

bookstore/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.hexagonal</groupId>
+  <artifactId>bookstore</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  
+  <properties>  
+    <java.version>1.8</java.version>  
+</properties>
+  
+  <parent>
+	<groupId>org.springframework.boot</groupId>
+	<artifactId>spring-boot-starter-parent</artifactId>
+	<version>2.3.1.RELEASE</version>
+</parent>
+
+<dependencies>
+	<dependency>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-web</artifactId>
+	</dependency>
+</dependencies>
+</project>

bookstore/src/main/java/com/hexagonal/MainApp.java

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+package com.hexagonal;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+
+@SpringBootApplication
+public class MainApp {
+    public static void main(String[] args) {
+        SpringApplication.run(MainApp.class, args);
+    }
+
+}

bookstore/src/main/java/com/hexagonal/controller/BookController.java

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+package com.hexagonal.controller;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.hexagonal.domain.Book;
+import com.hexagonal.service.BookService;
+
+@RestController
+public class BookController {
+
+    @Autowired
+    private BookService bookService;
+
+    @RequestMapping("/book/add")
+    @PostMapping(produces = { MediaType.TEXT_PLAIN_VALUE })
+    public void addBook(@RequestBody Book book) {
+        bookService.addBook(book);
+    }
+
+    public Book buyBook(@PathVariable String isbn) {
+        return bookService.buyBook(isbn);
+    }
+
+    public List<Book> listBooks() {
+        return bookService.listBooks();
+    }
+
+}

bookstore/src/main/java/com/hexagonal/domain/Book.java

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+package com.hexagonal.domain;
+
+public class Book {
+
+    private String name;
+    private String isbn;
+    private String author;
+
+    @Override
+    public String toString() {
+        return "Book [name=" + name + ", ISBN=" + isbn + ", author=" + author + "]";
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+}

bookstore/src/main/java/com/hexagonal/repository/BookRepository.java

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+package com.hexagonal.repository;
+
+import java.util.List;
+
+import com.hexagonal.domain.Book;
+
+public interface BookRepository {
+
+    public void add(Book book);
+
+    public Book buy(String isbn);
+
+    public List<Book> list();
+
+}

bookstore/src/main/java/com/hexagonal/repository/BookRepositoryImpl.java

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+package com.hexagonal.repository;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+import org.springframework.stereotype.Repository;
+
+import com.hexagonal.domain.Book;
+
+@Repository
+public class BookRepositoryImpl implements BookRepository {
+
+    private Map<String, Book> bookMap = new HashMap<>();
+
+    @Override
+    public void add(Book book) {
+        bookMap.put(book.getIsbn(), book);
+        System.out.println("Book Added " + book);
+    }
+
+    @Override
+    public Book buy(String isbn) {
+        return bookMap.get(isbn);
+    }
+
+    @Override
+    public List<Book> list() {
+        return bookMap.values()
+            .stream()
+            .collect(Collectors.toList());
+    }
+
+}

bookstore/src/main/java/com/hexagonal/service/BookService.java

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+package com.hexagonal.service;
+
+import java.util.List;
+
+import com.hexagonal.domain.Book;
+
+public interface BookService {
+
+    public void addBook(Book book);
+
+    public Book buyBook(String isbn);
+
+    public List<Book> listBooks();
+
+}

bookstore/src/main/java/com/hexagonal/service/BookServiceImpl.java

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+package com.hexagonal.service;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.hexagonal.domain.Book;
+import com.hexagonal.repository.BookRepository;
+
+@Service
+public class BookServiceImpl implements BookService {
+
+    @Autowired
+    private BookRepository bookRepository;
+
+    @Override
+    public void addBook(Book book) {
+        bookRepository.add(book);
+
+    }
+
+    @Override
+    public Book buyBook(String isbn) {
+
+        return bookRepository.buy(isbn);
+    }
+
+    @Override
+    public List<Book> listBooks() {
+
+        return bookRepository.list();
+    }
+
+}