From bb85bd933ea087239809af117625ad0d2b1d1b6d Mon Sep 17 00:00:00 2001
From: kwoyke <krzysztofwoyke@gmail.com>
Date: Fri, 10 Apr 2020 21:58:48 +0200
Subject: [PATCH] BAEL-3730: Add example of usage CacheManagerCustomizer in
 Spring Boot (#9048)

---
 spring-caching/pom.xml                        |  4 ++++
 .../caching/boot/CacheApplication.java        | 14 +++++++++++
 .../caching/boot/SimpleCacheCustomizer.java   | 24 +++++++++++++++++++
 .../SimpleCacheCustomizerIntegrationTest.java | 24 +++++++++++++++++++
 4 files changed, 66 insertions(+)
 create mode 100644 spring-caching/src/main/java/com/baeldung/caching/boot/CacheApplication.java
 create mode 100644 spring-caching/src/main/java/com/baeldung/caching/boot/SimpleCacheCustomizer.java
 create mode 100644 spring-caching/src/test/java/com/baeldung/caching/boot/SimpleCacheCustomizerIntegrationTest.java

diff --git a/spring-caching/pom.xml b/spring-caching/pom.xml
index c3ededbd14..d33f24de1f 100644
--- a/spring-caching/pom.xml
+++ b/spring-caching/pom.xml
@@ -19,6 +19,10 @@
             <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>
diff --git a/spring-caching/src/main/java/com/baeldung/caching/boot/CacheApplication.java b/spring-caching/src/main/java/com/baeldung/caching/boot/CacheApplication.java
new file mode 100644
index 0000000000..714dc443e0
--- /dev/null
+++ b/spring-caching/src/main/java/com/baeldung/caching/boot/CacheApplication.java
@@ -0,0 +1,14 @@
+package com.baeldung.caching.boot;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+
+@SpringBootApplication
+@EnableCaching
+public class CacheApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(CacheApplication.class, args);
+    }
+}
diff --git a/spring-caching/src/main/java/com/baeldung/caching/boot/SimpleCacheCustomizer.java b/spring-caching/src/main/java/com/baeldung/caching/boot/SimpleCacheCustomizer.java
new file mode 100644
index 0000000000..a76a01caae
--- /dev/null
+++ b/spring-caching/src/main/java/com/baeldung/caching/boot/SimpleCacheCustomizer.java
@@ -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));
+    }
+}
diff --git a/spring-caching/src/test/java/com/baeldung/caching/boot/SimpleCacheCustomizerIntegrationTest.java b/spring-caching/src/test/java/com/baeldung/caching/boot/SimpleCacheCustomizerIntegrationTest.java
new file mode 100644
index 0000000000..56a4bd4745
--- /dev/null
+++ b/spring-caching/src/test/java/com/baeldung/caching/boot/SimpleCacheCustomizerIntegrationTest.java
@@ -0,0 +1,24 @@
+package com.baeldung.caching.boot;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cache.CacheManager;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class SimpleCacheCustomizerIntegrationTest {
+
+    @Autowired
+    private CacheManager cacheManager;
+
+    @Test
+    public void givenCacheManagerCustomizerWhenBootstrappedThenCacheManagerCustomized() {
+        assertThat(cacheManager.getCacheNames())
+          .containsOnly(SimpleCacheCustomizer.USERS_CACHE, SimpleCacheCustomizer.TRANSACTIONS_CACHE);
+    }
+}
\ No newline at end of file