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Adding Spring Boot Cache implementation
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‎.gitignore

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# Log file
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*.log
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# BlueJ files
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*.ctxt
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# Mobile Tools for Java (J2ME)
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.mtj.tmp/
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# Package Files #
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*.jar
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*.war
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*.tar.gz
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*.rar
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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replay_pid*
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# Generated Sources
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target
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# IDE Files
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.idea

‎README.md

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## Spring Boot Caching: Elevate Your App's Speed and Efficiency
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For complete understanding of Spring Boot Caching and how you can use it inside your application you can checkout our blog.
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<br/><br/>**Blog Link:** [Spring Boot Caching: Elevate Your App's Speed and Efficiency](https://bootcamptoprod.com/spring-boot-caching)
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<br/>
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# spring-boot-caching
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A simple spring boot app highlighting how we can use caching

‎pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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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>3.1.2</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<groupId>com.bootcamptoprod</groupId>
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<artifactId>spring-boot-caching</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>spring-boot-caching</name>
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<description>Demo project for Spring Boot Caching</description>
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<properties>
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<java.version>17</java.version>
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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-actuator</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-cache</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-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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<scope>runtime</scope>
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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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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎src/main/java/com/bootcamptoprod/caching/Entity/Product.java

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package com.bootcamptoprod.caching.Entity;
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import jakarta.persistence.*;
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@Entity
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@Table(name = "Product")
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public class Product {
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@Id
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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private Long id;
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private String name;
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private double price;
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private boolean available;
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public Product() {
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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 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 boolean isAvailable() {
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return available;
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}
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public void setAvailable(boolean available) {
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this.available = available;
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}
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}

‎src/main/java/com/bootcamptoprod/caching/SpringBootCachingApplication.java

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package com.bootcamptoprod.caching;
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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.cache.annotation.EnableCaching;
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import org.springframework.scheduling.annotation.EnableScheduling;
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@SpringBootApplication
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@EnableCaching
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@EnableScheduling
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public class SpringBootCachingApplication {
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public static void main(String[] args) {
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SpringApplication.run(SpringBootCachingApplication.class, args);
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}
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}

‎src/main/java/com/bootcamptoprod/caching/controller/ProductController.java

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package com.bootcamptoprod.caching.controller;
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import com.bootcamptoprod.caching.Entity.Product;
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import com.bootcamptoprod.caching.service.ProductService;
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import org.springframework.web.bind.annotation.*;
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import java.util.List;
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@RestController
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@RequestMapping("/api/products")
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public class ProductController {
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private final ProductService productService;
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public ProductController(ProductService productService) {
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this.productService = productService;
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}
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@GetMapping
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public List<Product> getAllProducts() {
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return productService.getAllProducts();
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}
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@GetMapping("/{productId}")
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public Product getProductById(@PathVariable long productId) {
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return productService.getProductById(productId);
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}
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@PostMapping
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public Product addProduct(@RequestBody Product product) {
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return productService.updateProduct(product);
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}
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@PutMapping("/{productId}")
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public Product updateProduct(@PathVariable long productId, @RequestBody Product product) {
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product.setId(productId);
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return productService.updateProduct(product);
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}
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@DeleteMapping("/{productId}")
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public void deleteProduct(@PathVariable long productId) {
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productService.deleteProduct(productId);
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}
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@GetMapping("/details/{productId}")
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public Product getProductDetails(@PathVariable long productId) {
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Product product = new Product();
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product.setId(productId);
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return productService.getProductDetails(product);
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}
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@GetMapping("/price-check")
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public Product getProductWithPriceCheck(@RequestParam long productId) {
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return productService.getProductWithPriceCheck(productId);
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}
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@PostMapping("/clear-cache")
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public void clearProductCache() {
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productService.clearProductCache();
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}
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}

‎src/main/java/com/bootcamptoprod/caching/repository/ProductRepository.java

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package com.bootcamptoprod.caching.repository;
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import com.bootcamptoprod.caching.Entity.Product;
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import org.springframework.data.jpa.repository.JpaRepository;
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public interface ProductRepository extends JpaRepository<Product, Long> {
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}

‎src/main/java/com/bootcamptoprod/caching/service/ProductService.java

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package com.bootcamptoprod.caching.service;
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import com.bootcamptoprod.caching.Entity.Product;
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import com.bootcamptoprod.caching.repository.ProductRepository;
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import org.springframework.cache.annotation.CacheEvict;
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import org.springframework.cache.annotation.CachePut;
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import org.springframework.cache.annotation.Cacheable;
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import org.springframework.cache.annotation.Caching;
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import org.springframework.scheduling.annotation.Scheduled;
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import org.springframework.stereotype.Service;
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import java.util.List;
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@Service
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public class ProductService {
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private final ProductRepository productRepository;
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public ProductService(ProductRepository productRepository) {
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this.productRepository = productRepository;
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}
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@Cacheable("products")
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public List<Product> getAllProducts() {
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return productRepository.findAll();
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}
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@Cacheable(value = "products", key = "#productId", condition = "#productId > 0")
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public Product getProductById(long productId) {
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return productRepository.findById(productId).orElse(null);
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}
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@CachePut(value = "products", key = "#product.id")
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public Product updateProduct(Product product) {
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Product updatedProduct = productRepository.save(product);
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return updatedProduct;
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}
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@CacheEvict(value = "products", key = "#productId")
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public void deleteProduct(long productId) {
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productRepository.deleteById(productId);
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}
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@Caching(
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cacheable = {@Cacheable(value = "products", key = "#product.id")},
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evict = {@CacheEvict(value = "recentProducts", allEntries = true)}
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)
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public Product getProductDetails(Product product) {
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// Logic to fetch detailed product information
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return productRepository.findById(product.getId()).orElse(null);
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}
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@Cacheable(value = "products", key = "#productId", unless = "#result.price < 100")
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public Product getProductWithPriceCheck(long productId) {
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return productRepository.findById(productId).orElse(null);
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}
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@CacheEvict(value = "products", allEntries = true)
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public void clearProductCache() {
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System.out.println("Product cache was cleared successfully");
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}
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@CacheEvict(value = "products", allEntries = true)
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@Scheduled(fixedRateString = "43200000")
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public void clearProductsCache() {
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System.out.println("Clearing products cache");
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}
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}

‎src/main/resources/application.properties

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management.endpoints.web.exposure.include=*
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logging.level.org.springframework.cache=TRACE
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spring.jpa.defer-datasource-initialization=true

‎src/main/resources/data.sql

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INSERT INTO product (name, price, available) VALUES ('Product A', 150.0, true);
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INSERT INTO product (name, price, available) VALUES ('Product B', 200.0, true);
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INSERT INTO product (name, price, available) VALUES ('Product C', 80.0, false);
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INSERT INTO product (name, price, available) VALUES ('Product D', 70.0, false);
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INSERT INTO product (name, price, available) VALUES ('Product E', 54.0, true);
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INSERT INTO product (name, price, available) VALUES ('Product F', 68.0, true);

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