extract spring-caching module

spring-caching/README.md

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+### 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)

spring-caching/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>
+    <artifactId>spring-caching</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <name>spring-caching</name>
+    <packaging>war</packaging>
+
+    <parent>
+        <artifactId>parent-boot-2</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-boot-2</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</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>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <ehcache.version>3.5.2</ehcache.version>
+    </properties>
+</project>

spring-caching/src/main/java/org/baeldung/caching/config/ApplicationCacheConfig.java

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+package org.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();
+    }
+}

spring-caching/src/main/java/org/baeldung/caching/config/CachingConfig.java

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+package org.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("org.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;
+    }
+
+}

spring-caching/src/main/java/org/baeldung/caching/config/CustomKeyGenerator.java

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+package org.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, "_");
+    }
+}

spring-caching/src/main/java/org/baeldung/caching/eviction/controllers/CachingController.java

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+package org.baeldung.caching.eviction.controllers;
+
+import org.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();
+    }
+}

spring-caching/src/main/java/org/baeldung/caching/eviction/service/CachingService.java

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+package org.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();
+    }
+}

spring-caching/src/main/java/org/baeldung/caching/example/AbstractService.java

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+package org.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();
+    }
+
+}

spring-caching/src/main/java/org/baeldung/caching/example/BookService.java

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+package org.baeldung.caching.example;
+
+import org.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;
+    }
+
+}

spring-caching/src/main/java/org/baeldung/caching/example/Customer.java

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+package org.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;
+    }
+
+}

spring-caching/src/main/java/org/baeldung/caching/example/CustomerDataService.java

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+package org.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();
+    }
+}

spring-caching/src/main/java/org/baeldung/caching/example/CustomerServiceWithParent.java

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+package org.baeldung.caching.example;
+
+import org.springframework.cache.annotation.CacheConfig;
+import org.springframework.stereotype.Component;
+
+@Component
+@CacheConfig(cacheNames = { "addresses" })
+public class CustomerServiceWithParent extends AbstractService {
+    //
+}

spring-caching/src/main/java/org/baeldung/caching/model/Book.java

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+package org.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;
+    }
+}

spring-caching/src/main/java/org/baeldung/ehcache/calculator/SquaredCalculator.java

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+package org.baeldung.ehcache.calculator;
+
+import org.baeldung.ehcache.config.CacheHelper;
+
+public class SquaredCalculator {
+    private CacheHelper cache;
+
+    public int getSquareValueOfNumber(int input) {
+        if (cache.getSquareNumberCache().containsKey(input)) {
+            return cache.getSquareNumberCache().get(input);
+        }
+
+        System.out.println("Calculating square value of " + input + " and caching result.");
+
+        int squaredValue = (int) Math.pow(input, 2);
+        cache.getSquareNumberCache().put(input, squaredValue);
+
+        return squaredValue;
+    }
+
+    public void setCache(CacheHelper cache) {
+        this.cache = cache;
+    }
+}

spring-caching/src/main/java/org/baeldung/ehcache/config/CacheHelper.java

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+package org.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);
+    }
+
+}

spring-caching/src/main/resources/config.xml

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+<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cache="http://www.springframework.org/schema/cache"
+    xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop"
+    xsi:schemaLocation="
+        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
+        http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.2.xsd
+        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
+        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
+    "
+>
+
+    <cache:annotation-driven/>
+
+    <!-- <context:annotation-config/> -->
+
+    <!-- the service that you wish to make cacheable. -->
+    <bean id="customerDataService" class="org.baeldung.caching.example.CustomerDataService"/>
+
+    <bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
+        <property name="caches">
+            <set>
+                <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" name="directory"/>
+                <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" name="addresses"/>
+            </set>
+        </property>
+    </bean>
+
+    <!-- define caching behavior -->
+    <cache:advice id="cachingBehavior" cache-manager="cacheManager">
+        <cache:caching cache="addresses">
+            <cache:cacheable method="getAddress" key="#customer.name"/>
+        </cache:caching>
+    </cache:advice>
+
+
+    <!-- apply the behavior to all the implementations of CustomerDataService  -->
+    <aop:config>
+        <aop:advisor advice-ref="cachingBehavior" pointcut="execution(* org.baeldung.caching.example.CustomerDataService.*(..))"/>
+    </aop:config>
+
+</beans>

spring-caching/src/test/java/org/baeldung/caching/test/CacheEvictAnnotationIntegrationTest.java

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+package org.baeldung.caching.test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.junit.Assert.assertThat;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.baeldung.caching.eviction.service.CachingService;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.Cache;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean;
+import org.springframework.cache.support.SimpleCacheManager;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration
+public class CacheEvictAnnotationIntegrationTest {
+
+	@Configuration
+	@EnableCaching
+	static class ContextConfiguration {
+
+		@Bean
+		public CachingService cachingService() {
+			return new CachingService();
+		}
+		
+		@Bean
+		public CacheManager cacheManager(){
+			SimpleCacheManager cacheManager = new SimpleCacheManager();
+			List<Cache> caches = new ArrayList<>();
+			caches.add(cacheBean().getObject());
+			cacheManager.setCaches(caches );
+			return cacheManager;
+		}
+		
+		@Bean
+		public ConcurrentMapCacheFactoryBean cacheBean(){
+			ConcurrentMapCacheFactoryBean cacheFactoryBean = new ConcurrentMapCacheFactoryBean();
+			cacheFactoryBean.setName("first");
+			return cacheFactoryBean;
+		}
+	}
+
+	@Autowired
+	CachingService cachingService;
+
+	@Before
+	public void before() {
+		cachingService.putToCache("first", "key1", "Baeldung");
+		cachingService.putToCache("first", "key2", "Article");
+	}
+
+	@Test
+	public void givenFirstCache_whenSingleCacheValueEvictRequested_thenEmptyCacheValue() {
+		cachingService.evictSingleCacheValue("key1");
+		String key1 = cachingService.getFromCache("first", "key1");
+		assertThat(key1, is(nullValue()));
+	}
+
+	@Test
+	public void givenFirstCache_whenAllCacheValueEvictRequested_thenEmptyCache() {
+		cachingService.evictAllCacheValues();
+		String key1 = cachingService.getFromCache("first", "key1");
+		String key2 = cachingService.getFromCache("first", "key2");
+		assertThat(key1, is(nullValue()));
+		assertThat(key2, is(nullValue()));
+	}
+}

spring-caching/src/test/java/org/baeldung/caching/test/CacheManagerEvictIntegrationTest.java

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+package org.baeldung.caching.test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.junit.Assert.assertThat;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.baeldung.caching.eviction.service.CachingService;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.Cache;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean;
+import org.springframework.cache.support.SimpleCacheManager;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration
+public class CacheManagerEvictIntegrationTest {
+	
+	@Configuration
+	static class ContextConfiguration {
+
+		@Bean
+		public CachingService cachingService() {
+			return new CachingService();
+		}
+		
+		@Bean
+		public CacheManager cacheManager(){
+			SimpleCacheManager cacheManager = new SimpleCacheManager();
+			List<Cache> caches = new ArrayList<>();
+			caches.add(cacheBeanFirst().getObject());
+			caches.add(cacheBeanSecond().getObject());
+			cacheManager.setCaches(caches );
+			return cacheManager;
+		}
+		
+		@Bean
+		public ConcurrentMapCacheFactoryBean cacheBeanFirst(){
+			ConcurrentMapCacheFactoryBean cacheFactoryBean = new ConcurrentMapCacheFactoryBean();
+			cacheFactoryBean.setName("first");
+			return cacheFactoryBean;
+		}
+		
+		@Bean
+		public ConcurrentMapCacheFactoryBean cacheBeanSecond(){
+			ConcurrentMapCacheFactoryBean cacheFactoryBean = new ConcurrentMapCacheFactoryBean();
+			cacheFactoryBean.setName("second");
+			return cacheFactoryBean;
+		}
+	}
+
+    @Autowired
+    CachingService cachingService;
+
+    @Before
+    public void before() {
+        cachingService.putToCache("first", "key1", "Baeldung");
+        cachingService.putToCache("first", "key2", "Article");
+        cachingService.putToCache("second", "key", "Article");
+    }
+
+    @Test
+    public void givenFirstCache_whenSingleCacheValueEvictRequested_thenEmptyCacheValue() {
+        cachingService.evictSingleCacheValue("first", "key1");
+        String key1 = cachingService.getFromCache("first", "key1");
+        assertThat(key1, is(nullValue()));
+    }
+
+    @Test
+    public void givenFirstCache_whenAllCacheValueEvictRequested_thenEmptyCache() {
+        cachingService.evictAllCacheValues("first");
+        String key1 = cachingService.getFromCache("first", "key1");
+        String key2 = cachingService.getFromCache("first", "key2");
+        assertThat(key1, is(nullValue()));
+        assertThat(key2, is(nullValue()));
+    }
+
+    @Test
+    public void givenAllCaches_whenAllCacheEvictRequested_thenEmptyAllCaches() {
+        cachingService.evictAllCaches();
+        String key1 = cachingService.getFromCache("first", "key1");
+        assertThat(key1, is(nullValue()));
+
+        String key = cachingService.getFromCache("second", "key");
+        assertThat(key, is(nullValue()));
+    }
+}

spring-caching/src/test/java/org/baeldung/caching/test/SpringCachingIntegrationTest.java

@@ -0,0 +1,71 @@
+package org.baeldung.caching.test;
+
+import org.baeldung.caching.config.CachingConfig;
+import org.baeldung.caching.example.Customer;
+import org.baeldung.caching.example.CustomerDataService;
+import org.baeldung.caching.example.CustomerServiceWithParent;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { CachingConfig.class }, loader = AnnotationConfigContextLoader.class)
+public class SpringCachingIntegrationTest {
+
+    @Autowired
+    private CustomerDataService service;
+
+    @Autowired
+    private CustomerServiceWithParent serviceWithParent;
+
+    //
+
+    @Test
+    public void whenGettingAddress_thenCorrect() {
+        final Customer cust = new Customer("Tom", "67-2, Downing Street, NY");
+        service.getAddress(cust);
+        service.getAddress(cust);
+
+        service.getAddress1(cust);
+        service.getAddress1(cust);
+
+        service.getAddress2(cust);
+        service.getAddress2(cust);
+
+        service.getAddress3(cust);
+        service.getAddress3(cust);
+
+        service.getAddress4(cust);
+        service.getAddress4(cust);
+
+        service.getAddress5(cust);
+        service.getAddress5(cust);
+    }
+
+    @Test
+    public void givenUsingServiceWithParent_whenGettingAddress_thenCorrect() {
+        final Customer cust = new Customer("Tom", "67-2, Downing Street, NY");
+
+        serviceWithParent.getAddress(cust);
+        serviceWithParent.getAddress(cust);
+
+        serviceWithParent.getAddress1(cust);
+        serviceWithParent.getAddress1(cust);
+
+        serviceWithParent.getAddress2(cust);
+        serviceWithParent.getAddress2(cust);
+
+        serviceWithParent.getAddress3(cust);
+        serviceWithParent.getAddress3(cust);
+
+        // serviceWithParent.getAddress4(cust);
+        // serviceWithParent.getAddress4(cust);
+
+        serviceWithParent.getAddress5(cust);
+        serviceWithParent.getAddress5(cust);
+    }
+
+}

spring-caching/src/test/java/org/baeldung/ehcache/SquareCalculatorUnitTest.java

@@ -0,0 +1,40 @@
+package org.baeldung.ehcache;
+
+import org.baeldung.ehcache.calculator.SquaredCalculator;
+import org.baeldung.ehcache.config.CacheHelper;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class SquareCalculatorUnitTest {
+    private SquaredCalculator squaredCalculator = new SquaredCalculator();
+    private CacheHelper cacheHelper = new CacheHelper();
+
+    @Before
+    public void setup() {
+        squaredCalculator.setCache(cacheHelper);
+    }
+
+    @Test
+    public void whenCalculatingSquareValueOnce_thenCacheDontHaveValues() {
+        for (int i = 10; i < 15; i++) {
+            assertFalse(cacheHelper.getSquareNumberCache().containsKey(i));
+            System.out.println("Square value of " + i + " is: " + squaredCalculator.getSquareValueOfNumber(i) + "\n");
+        }
+    }
+
+    @Test
+    public void whenCalculatingSquareValueAgain_thenCacheHasAllValues() {
+        for (int i = 10; i < 15; i++) {
+            assertFalse(cacheHelper.getSquareNumberCache().containsKey(i));
+            System.out.println("Square value of " + i + " is: " + squaredCalculator.getSquareValueOfNumber(i) + "\n");
+        }
+
+        for (int i = 10; i < 15; i++) {
+            assertTrue(cacheHelper.getSquareNumberCache().containsKey(i));
+            System.out.println("Square value of " + i + " is: " + squaredCalculator.getSquareValueOfNumber(i) + "\n");
+        }
+    }
+}