Using Arthur Gavlyukovskiy's decorator

Author: AnghelLeonard

HibernateSpringBootDataSourceDecorator/README.md

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+**[View Binding/Extracted Params Via Log4J 2](https://github.com/AnghelLeonard/Hibernate-SpringBoot/tree/master/HibernateSpringBootLog4j2ViewBindingParameters)**
+
+**Description:** View the prepared statement binding/extracted parameters via Log4J 2 logger setting.
+
+**Key points:**
+- for Maven, in `pom.xml`, exclude Spring Boot's Default Logging
+- for Maven, in `pom.xml`, Add Log4j 2 Dependency
+- in `log4j2.xml` add, `<Logger name="org.hibernate.type.descriptor.sql" level="trace"/>`
+   
+**Output example:**
+![](https://github.com/AnghelLeonard/Hibernate-SpringBoot/blob/master/HibernateSpringBootLog4j2ViewBindingParameters/log4j2%20display%20binding%20and%20extracted%20parameters.png)
+
+-----------------------------------------------------------------------------------------------------------------------    
+<table>
+     <tr><td><b>If you need a deep dive into the performance recipes exposed in this repository then I am sure that you will love my book "Spring Boot Persistence Best Practices"</b></td><td><b>If you need a hand of tips and illustrations of 100+ Java persistence performance issues then "Java Persistence Performance Illustrated Guide" is for you.</b></td></tr>
+     <tr><td>
+<a href="https://www.apress.com/us/book/9781484256251"><p align="left"><img src="https://github.com/AnghelLeonard/Hibernate-SpringBoot/blob/master/Spring%20Boot%20Persistence%20Best%20Practices.jpg" height="500" width="450"/></p></a>
+</td><td>
+<a href="https://leanpub.com/java-persistence-performance-illustrated-guide"><p align="right"><img src="https://github.com/AnghelLeonard/Hibernate-SpringBoot/blob/master/Java%20Persistence%20Performance%20Illustrated%20Guide.jpg" height="500" width="450"/></p></a>
+</td></tr></table>
+
+-----------------------------------------------------------------------------------------------------------------------    

HibernateSpringBootDataSourceDecorator/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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.jpa</groupId>
+    <artifactId>HibernateSpringBootDataSourceDecorator</artifactId>
+    <version>1.0</version>
+    <packaging>jar</packaging>
+
+    <name>HibernateSpringBootDataSourceDecorator</name>
+    <description>JPA project for Spring Boot</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.5.7</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+        
+        <decorator.version>1.8.0</decorator.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.github.gavlyukovskiy</groupId>
+            <artifactId>datasource-proxy-spring-boot-starter</artifactId>    
+            <version>${decorator.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

HibernateSpringBootDataSourceDecorator/src/main/java/com/bookstore/MainApplication.java

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+package com.bookstore;
+
+import com.bookstore.service.BookstoreService;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+@SpringBootApplication
+public class MainApplication {
+
+    private final BookstoreService bookstoreService;
+
+    public MainApplication(BookstoreService bookstoreService) {
+        this.bookstoreService = bookstoreService;
+    }
+
+    public static void main(String[] args) {
+        SpringApplication.run(MainApplication.class, args);
+    }
+
+    @Bean
+    public ApplicationRunner init() {
+        return args -> {
+            
+            bookstoreService.persistAuthor();
+            bookstoreService.displayAuthor();
+        };
+    }
+}

HibernateSpringBootDataSourceDecorator/src/main/java/com/bookstore/entity/Author.java

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+package com.bookstore.entity;
+
+import java.io.Serializable;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Author implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private int age;
+    private String name;
+    private String genre;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getGenre() {
+        return genre;
+    }
+
+    public void setGenre(String genre) {
+        this.genre = genre;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    @Override
+    public String toString() {
+        return "Author{" + "id=" + id + ", age=" + age
+                + ", name=" + name + ", genre=" + genre + '}';
+    }
+}

HibernateSpringBootDataSourceDecorator/src/main/java/com/bookstore/repository/AuthorRepository.java

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+package com.bookstore.repository;
+
+import com.bookstore.entity.Author;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+import org.springframework.transaction.annotation.Transactional;
+
+@Repository
+public interface AuthorRepository extends JpaRepository<Author, Long> {
+    
+    @Transactional(readOnly=true)
+    public Author findByName(String name);
+}

HibernateSpringBootDataSourceDecorator/src/main/java/com/bookstore/service/BookstoreService.java

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+package com.bookstore.service;
+
+import com.bookstore.entity.Author;
+import com.bookstore.repository.AuthorRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+public class BookstoreService {
+
+    private final AuthorRepository authorRepository;
+
+    public BookstoreService(AuthorRepository authorRepository) {
+        this.authorRepository = authorRepository;
+    }
+
+    public void persistAuthor() {
+        Author author = new Author();
+        author.setName("Joana Nimar");
+        author.setGenre("History");
+        author.setAge(34);
+        
+        authorRepository.save(author);
+    }
+    
+    public void displayAuthor() {
+        
+        Author author = authorRepository.findById(1L).orElseThrow();
+        
+        System.out.println(author);
+    }
+}

HibernateSpringBootDataSourceDecorator/src/main/resources/application.properties

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+spring.datasource.url=jdbc:mysql://localhost:3306/bookstoredb?createDatabaseIfNotExist=true
+spring.datasource.username=root
+spring.datasource.password=root
+
+logging.level.root=DEBUG
+
+spring.jpa.hibernate.ddl-auto=create
+spring.jpa.show-sql=true
+
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
+
+spring.jpa.open-in-view=false