Add examples for BAEL-4098

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/caffeine/AddressController.java

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+package com.baeldung.caffeine;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class AddressController
+{
+    @Autowired
+    private AddressService addressService;
+
+    @GetMapping("/address/{id}")
+    public ResponseEntity<String> getAddress(@PathVariable("id") long customerId)
+    {
+        return ResponseEntity.ok(addressService.getAddress(customerId));
+    }
+
+    @GetMapping("/address2/{id}")
+    public ResponseEntity<String> getAddress2(@PathVariable("id") long customerId)
+    {
+        return ResponseEntity.ok(addressService.getAddress2(customerId));
+    }
+}

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/caffeine/AddressService.java

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+package com.baeldung.caffeine;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Service;
+
+/**
+ * Service that uses caching.
+ */
+@Service
+public class AddressService
+{
+    private final static Logger LOG = LoggerFactory.getLogger(AddressService.class);
+
+    @Autowired
+    private CacheManager cacheManager;
+
+    @Cacheable(cacheNames = "addresses")
+    public String getAddress(long customerId)
+    {
+        LOG.info("Method getAddress is invoked for customer {}", customerId);
+
+        return "123 Main St";
+    }
+
+    public String getAddress2(long customerId)
+    {
+        if(cacheManager.getCache("addresses2").get(customerId) != null)
+        {
+            return cacheManager.getCache("addresses2").get(customerId).get().toString();
+        }
+
+        LOG.info("Method getAddress2 is invoked for customer {}", customerId);
+
+        String address = "123 Main St";
+
+        cacheManager.getCache("addresses2").put(customerId, address);
+
+        return address;
+    }
+}

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/caffeine/CaffeineConfiguration.java

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+package com.baeldung.caffeine;
+
+import com.github.benmanes.caffeine.cache.Caffeine;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.cache.caffeine.CaffeineCacheManager;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.util.concurrent.TimeUnit;
+
+@EnableCaching
+@Configuration
+public class CaffeineConfiguration {
+    @Bean
+    public Caffeine caffeineConfig()
+    {
+        return Caffeine.newBuilder()
+                .expireAfterWrite(60, TimeUnit.MINUTES);
+    }
+
+    @Bean
+    public CacheManager cacheManager(Caffeine caffeine)
+    {
+        CaffeineCacheManager caffeineCacheManager = new CaffeineCacheManager();
+        caffeineCacheManager.getCache("addresses");
+        caffeineCacheManager.setCaffeine(caffeine);
+        return caffeineCacheManager;
+    }
+}

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/caffeine/CaffieneTutorialApp.java

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+package com.baeldung.caffeine;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+
+@SpringBootApplication
+public class CaffieneTutorialApp {
+    public static void main(String[] args) {
+        new SpringApplicationBuilder(CaffieneTutorialApp.class).run(args);
+    }
+}

spring-boot-modules/spring-boot-libraries/src/main/java/com/baeldung/caffeine/SecurityConfiguration.java

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+package com.baeldung.caffeine;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.zalando.problem.spring.web.advice.security.SecurityProblemSupport;
+
+@Configuration
+@EnableWebSecurity
+@Import(SecurityProblemSupport.class)
+public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http.csrf().disable();
+
+        http.authorizeRequests()
+                .antMatchers("/**")
+                .permitAll();
+    }
+}