[JAVA-31545] (#16222)

2024-03-25 23:06:53 +01:00
parent 0facf5ca65
commit c75b4b13fa
84 changed files with 7 additions and 7 deletions
@@ -0,0 +1,9 @@
+### Relevant articles:
+- [Introduction To Ehcache](http://www.baeldung.com/ehcache)
+- [A Guide To Caching in Spring](http://www.baeldung.com/spring-cache-tutorial)
+- [Spring Cache – Creating a Custom KeyGenerator](http://www.baeldung.com/spring-cache-custom-keygenerator)
+- [Cache Eviction in Spring Boot](https://www.baeldung.com/spring-boot-evict-cache)
+- [Using Multiple Cache Managers in Spring](https://www.baeldung.com/spring-multiple-cache-managers)
+- [Testing @Cacheable on Spring Data Repositories](https://www.baeldung.com/spring-data-testing-cacheable)
+- [Spring Boot Ehcache Example](https://www.baeldung.com/spring-boot-ehcache)
+- More articles: [[next -->]](/spring-boot-modules/spring-boot-caching-2)
@@ -0,0 +1,93 @@
+<?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>
+    <artifactId>spring-caching</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <name>spring-caching</name>
+    <packaging>war</packaging>
+
+    <parent>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-cache</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-webmvc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.ehcache</groupId>
+            <artifactId>ehcache</artifactId>
+            <classifier>jakarta</classifier>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.github.ben-manes.caffeine</groupId>
+            <artifactId>caffeine</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-commons</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <skip>true</skip>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <ehcache.version>3.10.8</ehcache.version>
+        <start-class>com.baeldung.caching.boot.CacheApplication</start-class>
+    </properties>
+
+</project>
@@ -0,0 +1,13 @@
+package com.baeldung.cachetest;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}
@@ -0,0 +1,10 @@
+package com.baeldung.cachetest.config;
+
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableCaching
+public class CacheConfig {
+ 
+}
@@ -0,0 +1,17 @@
+package com.baeldung.cachetest.config;
+
+import org.ehcache.event.CacheEvent;
+import org.ehcache.event.CacheEventListener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class CacheEventLogger implements CacheEventListener<Object, Object> {
+
+    private static final Logger log = LoggerFactory.getLogger(CacheEventLogger.class);
+
+    @Override
+    public void onEvent(CacheEvent<? extends Object, ? extends Object> cacheEvent) {
+        log.info("Cache event {} for item with key {}. Old value = {}, New value = {}", cacheEvent.getType(), cacheEvent.getKey(), cacheEvent.getOldValue(), cacheEvent.getNewValue());
+    }
+
+}
@@ -0,0 +1,29 @@
+package com.baeldung.cachetest.rest;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.cachetest.service.NumberService;
+
+@RestController
+@RequestMapping(path = "/number", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
+public class NumberController {
+
+    private final static Logger log = LoggerFactory.getLogger(NumberController.class);
+
+    @Autowired
+    private NumberService numberService;
+
+    @GetMapping(path = "/square/{number}")
+    public String getThing(@PathVariable Long number) {
+        log.info("call numberService to square {}", number);
+        return String.format("{\"square\": %s}", numberService.square(number));
+    }
+
+}
@@ -0,0 +1,23 @@
+package com.baeldung.cachetest.service;
+
+import java.math.BigDecimal;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Service;
+
+@Service
+public class NumberService {
+
+    private final static Logger log = LoggerFactory.getLogger(NumberService.class);
+
+    @Cacheable(value = "squareCache", key = "#number", condition = "#number>10")
+    public BigDecimal square(Long number) {
+        BigDecimal square = BigDecimal.valueOf(number)
+            .multiply(BigDecimal.valueOf(number));
+        log.info("square of {} is {}", number, square);
+        return square;
+    }
+
+}
@@ -0,0 +1,18 @@
+package com.baeldung.caching.boot;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+//import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@EnableCaching
+//to run any module like ehcache,caching or multiplecachemanager in local machine 
+//add it's package for ComponentScan like below
+//@ComponentScan("com.baeldung.multiplecachemanager")
+public class CacheApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(CacheApplication.class, args);
+    }
+}
@@ -0,0 +1,24 @@
+package com.baeldung.caching.boot;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.autoconfigure.cache.CacheManagerCustomizer;
+import org.springframework.cache.concurrent.ConcurrentMapCacheManager;
+import org.springframework.stereotype.Component;
+
+import static java.util.Arrays.asList;
+
+@Component
+public class SimpleCacheCustomizer implements CacheManagerCustomizer<ConcurrentMapCacheManager> {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(SimpleCacheCustomizer.class);
+
+    static final String USERS_CACHE = "users";
+    static final String TRANSACTIONS_CACHE = "transactions";
+
+    @Override
+    public void customize(ConcurrentMapCacheManager cacheManager) {
+        LOGGER.info("Customizing Cache Manager");
+        cacheManager.setCacheNames(asList(USERS_CACHE, TRANSACTIONS_CACHE));
+    }
+}
@@ -0,0 +1,30 @@
+package com.baeldung.caching.config;
+
+import org.springframework.cache.Cache;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.cache.concurrent.ConcurrentMapCache;
+import org.springframework.cache.interceptor.KeyGenerator;
+import org.springframework.cache.support.SimpleCacheManager;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.util.Arrays;
+
+@EnableCaching
+@Configuration
+public class ApplicationCacheConfig {
+
+    @Bean
+    public CacheManager cacheManager() {
+        SimpleCacheManager cacheManager = new SimpleCacheManager();
+        Cache booksCache = new ConcurrentMapCache("books");
+        cacheManager.setCaches(Arrays.asList(booksCache));
+        return cacheManager;
+    }
+
+    @Bean("customKeyGenerator")
+    public KeyGenerator keyGenerator() {
+        return new CustomKeyGenerator();
+    }
+}
@@ -0,0 +1,25 @@
+package com.baeldung.caching.config;
+
+import java.util.Arrays;
+
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.cache.concurrent.ConcurrentMapCache;
+import org.springframework.cache.support.SimpleCacheManager;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableCaching
+@ComponentScan("com.baeldung.caching.example")
+public class CachingConfig {
+
+    @Bean
+    public CacheManager cacheManager() {
+        final SimpleCacheManager cacheManager = new SimpleCacheManager();
+        cacheManager.setCaches(Arrays.asList(new ConcurrentMapCache("directory"), new ConcurrentMapCache("addresses")));
+        return cacheManager;
+    }
+
+}
@@ -0,0 +1,14 @@
+package com.baeldung.caching.config;
+
+import org.springframework.cache.interceptor.KeyGenerator;
+import org.springframework.util.StringUtils;
+
+import java.lang.reflect.Method;
+
+public class CustomKeyGenerator implements KeyGenerator {
+
+    public Object generate(Object target, Method method, Object... params) {
+        return target.getClass().getSimpleName() + "_" + method.getName() + "_"
+                + StringUtils.arrayToDelimitedString(params, "_");
+    }
+}
@@ -0,0 +1,18 @@
+package com.baeldung.caching.eviction.controllers;
+
+import com.baeldung.caching.eviction.service.CachingService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class CachingController {
+
+    @Autowired
+    CachingService cachingService;
+
+    @GetMapping("clearAllCaches")
+    public void clearAllCaches() {
+        cachingService.evictAllCaches();
+    }
+}
@@ -0,0 +1,53 @@
+package com.baeldung.caching.eviction.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CachingService {
+
+    @Autowired
+    CacheManager cacheManager;
+
+    public void putToCache(String cacheName, String key, String value) {
+        cacheManager.getCache(cacheName).put(key, value);
+    }
+
+    public String getFromCache(String cacheName, String key) {
+        String value = null;
+        if (cacheManager.getCache(cacheName).get(key) != null) {
+            value = cacheManager.getCache(cacheName).get(key).get().toString();
+        }
+        return value;
+    }
+
+    @CacheEvict(value = "first", key = "#cacheKey")
+    public void evictSingleCacheValue(String cacheKey) {
+    }
+
+    @CacheEvict(value = "first", allEntries = true)
+    public void evictAllCacheValues() {
+    }
+
+    public void evictSingleCacheValue(String cacheName, String cacheKey) {
+        cacheManager.getCache(cacheName).evict(cacheKey);
+    }
+
+    public void evictAllCacheValues(String cacheName) {
+        cacheManager.getCache(cacheName).clear();
+    }
+
+    public void evictAllCaches() {
+        cacheManager.getCacheNames()
+          .parallelStream()
+          .forEach(cacheName -> cacheManager.getCache(cacheName).clear());
+    }
+
+    @Scheduled(fixedRate = 6000)
+    public void evictAllcachesAtIntervals() {
+        evictAllCaches();
+    }
+}
@@ -0,0 +1,76 @@
+package com.baeldung.caching.example;
+
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.CachePut;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.cache.annotation.Caching;
+
+public abstract class AbstractService {
+
+    // this method configuration is equivalent to xml configuration
+    @Cacheable(value = "addresses", key = "#customer.name")
+    public String getAddress(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method returns the customer's address,
+       only it doesn't find it the cache- addresses and directory.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @Cacheable({ "addresses", "directory" })
+    public String getAddress1(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method returns the customer's address,
+        but refreshes all the entries in the cache to load new ones.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @CacheEvict(value = "addresses", allEntries = true)
+    public String getAddress2(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method returns the customer's address,
+        but not before selectively evicting the cache as per specified paramters.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @Caching(evict = { @CacheEvict("addresses"), @CacheEvict(value = "directory", key = "#customer.name") })
+    public String getAddress3(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method uses the class level cache to look up for entries.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @Cacheable
+    // parameter not required as we have declared it using @CacheConfig
+    public String getAddress4(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method selectively caches the results that meet the predefined criteria.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @CachePut(value = "addresses", condition = "#customer.name=='Tom'")
+    // @CachePut(value = "addresses", unless = "#result.length>64")
+    public String getAddress5(final Customer customer) {
+        return customer.getAddress();
+    }
+
+}
@@ -0,0 +1,21 @@
+package com.baeldung.caching.example;
+
+import com.baeldung.caching.model.Book;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Component;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Component
+public class BookService {
+
+    @Cacheable(value="books", keyGenerator="customKeyGenerator")
+    public List<Book> getBooks() {
+        List<Book> books = new ArrayList<Book>();
+        books.add(new Book(1, "The Counterfeiters", "André Gide"));
+        books.add(new Book(2, "Peer Gynt and Hedda Gabler", "Henrik Ibsen"));
+        return books;
+    }
+
+}
@@ -0,0 +1,48 @@
+package com.baeldung.caching.example;
+
+public class Customer {
+
+    private int id;
+    private String name;
+    private String address;
+
+    public Customer() {
+        super();
+    }
+
+    public Customer(final String name, final String address) {
+        this.name = name;
+        this.address = address;
+    }
+
+    //
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(final int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+
+    public String getAddress() {
+        return address;
+    }
+
+    public void setAddress(final String address) {
+        this.address = address;
+    }
+
+    public void setCustomerAddress(final String address) {
+        this.address = name + "," + address;
+    }
+
+}
@@ -0,0 +1,79 @@
+package com.baeldung.caching.example;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.CachePut;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.cache.annotation.Caching;
+import org.springframework.stereotype.Component;
+
+@Component
+@CacheConfig(cacheNames = { "addresses" })
+public class CustomerDataService {
+
+    // this method configuration is equivalent to xml configuration
+    @Cacheable(value = "addresses", key = "#customer.name")
+    public String getAddress(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method returns the customer's address,
+       only it doesn't find it the cache- addresses and directory.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @Cacheable({ "addresses", "directory" })
+    public String getAddress1(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method returns the customer's address,
+        but refreshes all the entries in the cache to load new ones.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @CacheEvict(value = "addresses", allEntries = true)
+    public String getAddress2(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method returns the customer's address,
+        but not before selectively evicting the cache as per specified paramters.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @Caching(evict = { @CacheEvict("addresses"), @CacheEvict(value = "directory", key = "#customer.name") })
+    public String getAddress3(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method uses the class level cache to look up for entries.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @Cacheable
+    // parameter not required as we have declared it using @CacheConfig
+    public String getAddress4(final Customer customer) {
+        return customer.getAddress();
+    }
+
+    /**
+     * The method selectively caches the results that meet the predefined criteria.
+     *
+     * @param customer the customer
+     * @return the address
+     */
+    @CachePut(value = "addresses", condition = "#customer.name=='Tom'")
+    // @CachePut(value = "addresses", unless = "#result.length>64")
+    public String getAddress5(final Customer customer) {
+        return customer.getAddress();
+    }
+}
@@ -0,0 +1,10 @@
+package com.baeldung.caching.example;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.stereotype.Component;
+
+@Component
+@CacheConfig(cacheNames = { "addresses" })
+public class CustomerServiceWithParent extends AbstractService {
+    //
+}
@@ -0,0 +1,41 @@
+package com.baeldung.caching.model;
+
+public class Book {
+
+    private int id;
+    private String author;
+    private String title;
+
+    public Book() {
+    }
+
+    public Book(int id, String author, String title) {
+        this.id = id;
+        this.author = author;
+        this.title = title;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+}
@@ -0,0 +1,28 @@
+package com.baeldung.ehcache.calculator;
+
+import com.baeldung.ehcache.config.CacheHelper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SquaredCalculator {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(SquaredCalculator.class);
+    private CacheHelper cache;
+
+    public int getSquareValueOfNumber(int input) {
+        if (cache.getSquareNumberCache().containsKey(input)) {
+            return cache.getSquareNumberCache().get(input);
+        }
+
+        LOGGER.debug("Calculating square value of {} and caching result.", input);
+
+        int squaredValue = (int) Math.pow(input, 2);
+        cache.getSquareNumberCache().put(input, squaredValue);
+
+        return squaredValue;
+    }
+
+    public void setCache(CacheHelper cache) {
+        this.cache = cache;
+    }
+}
@@ -0,0 +1,29 @@
+package com.baeldung.ehcache.config;
+
+import org.ehcache.Cache;
+import org.ehcache.CacheManager;
+import org.ehcache.config.builders.CacheConfigurationBuilder;
+import org.ehcache.config.builders.CacheManagerBuilder;
+import org.ehcache.config.builders.ResourcePoolsBuilder;
+
+public class CacheHelper {
+
+    private CacheManager cacheManager;
+    private Cache<Integer, Integer> squareNumberCache;
+
+    public CacheHelper() {
+        cacheManager = CacheManagerBuilder.newCacheManagerBuilder().build();
+        cacheManager.init();
+
+        squareNumberCache = cacheManager.createCache("squaredNumber", CacheConfigurationBuilder.newCacheConfigurationBuilder(Integer.class, Integer.class, ResourcePoolsBuilder.heap(10)));
+    }
+
+    public Cache<Integer, Integer> getSquareNumberCache() {
+        return squareNumberCache;
+    }
+
+    public Cache<Integer, Integer> getSquareNumberCacheFromCacheManager() {
+        return cacheManager.getCache("squaredNumber", Integer.class, Integer.class);
+    }
+
+}
@@ -0,0 +1,28 @@
+package com.baeldung.multiplecachemanager.bo;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Component;
+
+import com.baeldung.multiplecachemanager.entity.Customer;
+import com.baeldung.multiplecachemanager.entity.Order;
+import com.baeldung.multiplecachemanager.repository.CustomerDetailRepository;
+
+@Component
+public class CustomerDetailBO {
+
+    @Autowired
+    private CustomerDetailRepository customerDetailRepository;
+
+    @Cacheable(cacheNames = "customers")
+    public Customer getCustomerDetail(Integer customerId) {
+        return customerDetailRepository.getCustomerDetail(customerId);
+    }
+
+    @Cacheable(cacheNames = "customerOrders", cacheManager = "alternateCacheManager")
+    public List<Order> getCustomerOrders(Integer customerId) {
+        return customerDetailRepository.getCustomerOrders(customerId);
+    }
+}
@@ -0,0 +1,25 @@
+package com.baeldung.multiplecachemanager.bo;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Component;
+
+import com.baeldung.multiplecachemanager.entity.Order;
+import com.baeldung.multiplecachemanager.repository.OrderDetailRepository;
+
+@Component
+public class OrderDetailBO {
+
+    @Autowired
+    private OrderDetailRepository orderDetailRepository;
+    
+    @Cacheable(cacheNames = "orders", cacheResolver = "cacheResolver")
+    public Order getOrderDetail(Integer orderId) {
+        return orderDetailRepository.getOrderDetail(orderId);
+    }
+
+    @Cacheable(cacheNames = "orderprice", cacheResolver = "cacheResolver")
+    public double getOrderPrice(Integer orderId) {
+        return orderDetailRepository.getOrderPrice(orderId);
+    }
+}
@@ -0,0 +1,40 @@
+package com.baeldung.multiplecachemanager.config;
+
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.CachingConfigurerSupport;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.cache.caffeine.CaffeineCacheManager;
+import org.springframework.cache.concurrent.ConcurrentMapCacheManager;
+import org.springframework.cache.interceptor.CacheResolver;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+//import org.springframework.context.annotation.Primary;
+
+import com.github.benmanes.caffeine.cache.Caffeine;
+
+@Configuration
+@EnableCaching
+public class MultipleCacheManagerConfig extends CachingConfigurerSupport {
+
+    @Bean
+    //@Primary
+    public CacheManager cacheManager() {
+        CaffeineCacheManager cacheManager = new CaffeineCacheManager("customers", "orders");
+        cacheManager.setCaffeine(Caffeine.newBuilder()
+            .initialCapacity(200)
+            .maximumSize(500)
+            .weakKeys()
+            .recordStats());
+        return cacheManager;
+    }
+
+    @Bean
+    public CacheManager alternateCacheManager() {
+        return new ConcurrentMapCacheManager("customerOrders", "orderprice");
+    }
+
+    @Bean
+    public CacheResolver cacheResolver() {
+        return new MultipleCacheResolver(alternateCacheManager(), cacheManager());
+    }
+}
@@ -0,0 +1,38 @@
+package com.baeldung.multiplecachemanager.config;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.springframework.cache.Cache;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.interceptor.CacheOperationInvocationContext;
+import org.springframework.cache.interceptor.CacheResolver;
+
+public class MultipleCacheResolver implements CacheResolver {
+
+    private final CacheManager simpleCacheManager;
+
+    private final CacheManager caffeineCacheManager;
+
+    private static final String ORDER_CACHE = "orders";
+
+    private static final String ORDER_PRICE_CACHE = "orderprice";
+
+    public MultipleCacheResolver(CacheManager simpleCacheManager, CacheManager caffeineCacheManager) {
+        this.simpleCacheManager = simpleCacheManager;
+        this.caffeineCacheManager = caffeineCacheManager;
+
+    }
+
+    @Override
+    public Collection<? extends Cache> resolveCaches(CacheOperationInvocationContext<?> context) {
+        Collection<Cache> caches = new ArrayList<Cache>();
+        if ("getOrderDetail".equals(context.getMethod()
+            .getName())) {
+            caches.add(caffeineCacheManager.getCache(ORDER_CACHE));
+        } else {
+            caches.add(simpleCacheManager.getCache(ORDER_PRICE_CACHE));
+        }
+        return caches;
+    }
+}
@@ -0,0 +1,43 @@
+package com.baeldung.multiplecachemanager.controller;
+
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+import com.baeldung.multiplecachemanager.bo.CustomerDetailBO;
+import com.baeldung.multiplecachemanager.bo.OrderDetailBO;
+import com.baeldung.multiplecachemanager.entity.Customer;
+import com.baeldung.multiplecachemanager.entity.Order;
+
+@RestController
+public class MultipleCacheManagerController {
+
+    @Autowired
+    private CustomerDetailBO customerDetailBO;
+
+    @Autowired
+    private OrderDetailBO orderDetailBO;
+
+    @GetMapping(value = "/getCustomer/{customerid}")
+    public Customer getCustomer(@PathVariable Integer customerid) {
+        return customerDetailBO.getCustomerDetail(customerid);
+    }
+
+    @GetMapping(value = "/getCustomerOrders/{customerid}")
+    public List<Order> getCustomerOrders(@PathVariable Integer customerid) {
+        return customerDetailBO.getCustomerOrders(customerid);
+    }
+
+    @GetMapping(value = "/getOrder/{orderid}")
+    public Order getOrder(@PathVariable Integer orderid) {
+        return orderDetailBO.getOrderDetail(orderid);
+    }
+
+    @GetMapping(value = "/getOrderPrice/{orderid}")
+    public double getOrderPrice(@PathVariable Integer orderid) {
+        return orderDetailBO.getOrderPrice(orderid);
+    }
+}
@@ -0,0 +1,24 @@
+package com.baeldung.multiplecachemanager.entity;
+
+public class Customer {
+
+    private int customerId;
+
+    private String customerName;
+
+    public int getCustomerId() {
+        return customerId;
+    }
+
+    public void setCustomerId(int customerId) {
+        this.customerId = customerId;
+    }
+
+    public String getCustomerName() {
+        return customerName;
+    }
+
+    public void setCustomerName(String customerName) {
+        this.customerName = customerName;
+    }
+}
@@ -0,0 +1,34 @@
+package com.baeldung.multiplecachemanager.entity;
+
+public class Item {
+
+    private int itemId;
+
+    private String itemDesc;
+
+    private double itemPrice;
+
+    public int getItemId() {
+        return itemId;
+    }
+
+    public void setItemId(int itemId) {
+        this.itemId = itemId;
+    }
+
+    public String getItemDesc() {
+        return itemDesc;
+    }
+
+    public void setItemDesc(String itemDesc) {
+        this.itemDesc = itemDesc;
+    }
+
+    public double getItemPrice() {
+        return itemPrice;
+    }
+
+    public void setItemPrice(double itemPrice) {
+        this.itemPrice = itemPrice;
+    }
+}
@@ -0,0 +1,44 @@
+package com.baeldung.multiplecachemanager.entity;
+
+public class Order {
+
+    private int orderId;
+
+    private int itemId;
+
+    private int quantity;
+
+    private int customerId;
+
+    public int getOrderId() {
+        return orderId;
+    }
+
+    public void setOrderId(int orderId) {
+        this.orderId = orderId;
+    }
+
+    public int getItemId() {
+        return itemId;
+    }
+
+    public void setItemId(int itemId) {
+        this.itemId = itemId;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    public int getCustomerId() {
+        return customerId;
+    }
+
+    public void setCustomerId(int customerId) {
+        this.customerId = customerId;
+    }
+}
--- a/Show More
+++ b/Show More