ref(samples): Replace ConcurrentMapCacheManager with Caffeine

Use Caffeine as the cache provider instead of a plain
ConcurrentMapCacheManager. Spring Boot auto-configures
CaffeineCacheManager when Caffeine is on the classpath,
so the explicit CacheManager bean is no longer needed.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: adinauer

sentry-samples/sentry-samples-spring-boot-4/build.gradle.kts

@@ -57,6 +57,9 @@ dependencies {
   implementation(projects.sentryQuartz)
   implementation(projects.sentryAsyncProfiler)
 
+  // cache tracing
+  implementation("com.github.ben-manes.caffeine:caffeine")
+
   // database query tracing
   implementation(projects.sentryJdbc)
   runtimeOnly(libs.hsqldb)

sentry-samples/sentry-samples-spring-boot-4/src/main/java/io/sentry/samples/spring/boot4/SentryDemoApplication.java

@@ -9,9 +9,7 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.restclient.RestTemplateBuilder;
-import org.springframework.cache.CacheManager;
 import org.springframework.cache.annotation.EnableCaching;
-import org.springframework.cache.concurrent.ConcurrentMapCacheManager;
 import org.springframework.context.annotation.Bean;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.scheduling.quartz.CronTriggerFactoryBean;
@@ -29,11 +27,6 @@ public static void main(String[] args) {
     SpringApplication.run(SentryDemoApplication.class, args);
   }
 
-  @Bean
-  CacheManager cacheManager() {
-    return new ConcurrentMapCacheManager("todos");
-  }
-
   @Bean
   RestTemplate restTemplate(RestTemplateBuilder builder) {
     return builder.build();

sentry-samples/sentry-samples-spring-boot-4/src/main/resources/application.properties

@@ -21,6 +21,8 @@ sentry.profile-session-sample-rate=1.0
 sentry.profiling-traces-dir-path=tmp/sentry/profiling-traces
 sentry.profile-lifecycle=TRACE
 sentry.enable-cache-tracing=true
+spring.cache.cache-names=todos
+spring.cache.caffeine.spec=maximumSize=500,expireAfterAccess=600s
 
 # Uncomment and set to true to enable aot compatibility
 # This flag disables all AOP related features (i.e. @SentryTransaction, @SentrySpan)