feat(samples): Add cache tracing to all Spring Boot 3 Jakarta samples

Add CacheController, TodoService with @Cacheable/@CachePut/@CacheEvict,
Caffeine cache config, and CacheSystemTest e2e tests to all four Jakarta
sample modules:
- sentry-samples-spring-boot-jakarta
- sentry-samples-spring-boot-jakarta-opentelemetry
- sentry-samples-spring-boot-jakarta-opentelemetry-noagent
- sentry-samples-spring-boot-webflux-jakarta

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

Author: adinauer

gradle/libs.versions.toml

@@ -181,6 +181,7 @@ springboot3-starter-aop = { module = "org.springframework.boot:spring-boot-start
 springboot3-starter-security = { module = "org.springframework.boot:spring-boot-starter-security", version.ref = "springboot3" }
 springboot3-starter-jdbc = { module = "org.springframework.boot:spring-boot-starter-jdbc", version.ref = "springboot3" }
 springboot3-starter-actuator = { module = "org.springframework.boot:spring-boot-starter-actuator", version.ref = "springboot3" }
+springboot3-starter-cache = { module = "org.springframework.boot:spring-boot-starter-cache", version.ref = "springboot3" }
 springboot4-otel = { module = "io.opentelemetry.instrumentation:opentelemetry-spring-boot-starter", version.ref = "otelInstrumentation" }
 springboot4-resttestclient = { module = "org.springframework.boot:spring-boot-resttestclient", version.ref = "springboot4" }
 springboot4-starter = { module = "org.springframework.boot:spring-boot-starter", version.ref = "springboot4" }

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry-noagent/build.gradle.kts

@@ -52,6 +52,10 @@ dependencies {
   implementation(projects.sentryAsyncProfiler)
   implementation(projects.sentryOpentelemetry.sentryOpentelemetryAgentlessSpring)
 
+  // cache tracing
+  implementation(libs.springboot3.starter.cache)
+  implementation(libs.caffeine)
+
   // database query tracing
   implementation(projects.sentryJdbc)
   runtimeOnly(libs.hsqldb)

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry-noagent/src/main/java/io/sentry/samples/spring/boot/jakarta/CacheController.java

@@ -0,0 +1,34 @@
+package io.sentry.samples.spring.boot.jakarta;
+
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/cache/")
+public class CacheController {
+  private final TodoService todoService;
+
+  public CacheController(TodoService todoService) {
+    this.todoService = todoService;
+  }
+
+  @GetMapping("{id}")
+  Todo get(@PathVariable Long id) {
+    return todoService.get(id);
+  }
+
+  @PostMapping
+  Todo save(@RequestBody Todo todo) {
+    return todoService.save(todo);
+  }
+
+  @DeleteMapping("{id}")
+  void delete(@PathVariable Long id) {
+    todoService.delete(id);
+  }
+}

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry-noagent/src/main/java/io/sentry/samples/spring/boot/jakarta/SentryDemoApplication.java

@@ -11,6 +11,7 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.cache.annotation.EnableCaching;
 import org.springframework.context.annotation.Bean;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.scheduling.quartz.CronTriggerFactoryBean;
@@ -21,6 +22,7 @@
 import org.springframework.web.reactive.function.client.WebClient;
 
 @SpringBootApplication
+@EnableCaching
 @EnableScheduling
 public class SentryDemoApplication {
   public static void main(String[] args) {

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry-noagent/src/main/java/io/sentry/samples/spring/boot/jakarta/TodoService.java

@@ -0,0 +1,29 @@
+package io.sentry.samples.spring.boot.jakarta;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.CachePut;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Service;
+
+@Service
+public class TodoService {
+  private final Map<Long, Todo> store = new ConcurrentHashMap<>();
+
+  @Cacheable(value = "todos", key = "#id")
+  public Todo get(Long id) {
+    return store.get(id);
+  }
+
+  @CachePut(value = "todos", key = "#todo.id")
+  public Todo save(Todo todo) {
+    store.put(todo.getId(), todo);
+    return todo;
+  }
+
+  @CacheEvict(value = "todos", key = "#id")
+  public void delete(Long id) {
+    store.remove(id);
+  }
+}

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry-noagent/src/main/resources/application.properties

@@ -35,6 +35,11 @@ spring.graphql.graphiql.enabled=true
 spring.graphql.websocket.path=/graphql
 spring.quartz.job-store-type=memory
 
+# Cache tracing
+sentry.enable-cache-tracing=true
+spring.cache.cache-names=todos
+spring.cache.caffeine.spec=maximumSize=500,expireAfterAccess=600s
+
 # OTEL configuration
 otel.propagators=tracecontext,baggage,sentry
 otel.logs.exporter=none

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry-noagent/src/test/kotlin/io/sentry/systemtest/CacheSystemTest.kt

@@ -0,0 +1,51 @@
+package io.sentry.systemtest
+
+import io.sentry.systemtest.util.TestHelper
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import org.junit.Before
+
+class CacheSystemTest {
+  lateinit var testHelper: TestHelper
+
+  @Before
+  fun setup() {
+    testHelper = TestHelper("http://localhost:8080")
+    testHelper.reset()
+  }
+
+  @Test
+  fun `cache put and get produce spans`() {
+    val restClient = testHelper.restClient
+
+    // Save a todo (triggers @CachePut -> cache.put span)
+    val todo = Todo(1L, "test-todo", false)
+    restClient.saveCachedTodo(todo)
+    assertEquals(200, restClient.lastKnownStatusCode)
+
+    testHelper.ensureTransactionReceived { transaction, _ ->
+      testHelper.doesTransactionContainSpanWithOp(transaction, "cache.put")
+    }
+
+    testHelper.reset()
+
+    // Get the todo (triggers @Cacheable -> cache.get span, should be a hit)
+    restClient.getCachedTodo(1L)
+    assertEquals(200, restClient.lastKnownStatusCode)
+
+    testHelper.ensureTransactionReceived { transaction, _ ->
+      testHelper.doesTransactionContainSpanWithOp(transaction, "cache.get")
+    }
+  }
+
+  @Test
+  fun `cache evict produces span`() {
+    val restClient = testHelper.restClient
+
+    restClient.deleteCachedTodo(1L)
+
+    testHelper.ensureTransactionReceived { transaction, _ ->
+      testHelper.doesTransactionContainSpanWithOp(transaction, "cache.remove")
+    }
+  }
+}

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry/build.gradle.kts

@@ -56,6 +56,10 @@ dependencies {
   implementation(libs.otel)
   implementation(projects.sentryAsyncProfiler)
 
+  // cache tracing
+  implementation(libs.springboot3.starter.cache)
+  implementation(libs.caffeine)
+
   // database query tracing
   implementation(projects.sentryJdbc)
   runtimeOnly(libs.hsqldb)

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry/src/main/java/io/sentry/samples/spring/boot/jakarta/CacheController.java

@@ -0,0 +1,34 @@
+package io.sentry.samples.spring.boot.jakarta;
+
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/cache/")
+public class CacheController {
+  private final TodoService todoService;
+
+  public CacheController(TodoService todoService) {
+    this.todoService = todoService;
+  }
+
+  @GetMapping("{id}")
+  Todo get(@PathVariable Long id) {
+    return todoService.get(id);
+  }
+
+  @PostMapping
+  Todo save(@RequestBody Todo todo) {
+    return todoService.save(todo);
+  }
+
+  @DeleteMapping("{id}")
+  void delete(@PathVariable Long id) {
+    todoService.delete(id);
+  }
+}

sentry-samples/sentry-samples-spring-boot-jakarta-opentelemetry/src/main/java/io/sentry/samples/spring/boot/jakarta/SentryDemoApplication.java

@@ -11,6 +11,7 @@
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.cache.annotation.EnableCaching;
 import org.springframework.context.annotation.Bean;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.scheduling.quartz.CronTriggerFactoryBean;
@@ -21,6 +22,7 @@
 import org.springframework.web.reactive.function.client.WebClient;
 
 @SpringBootApplication
+@EnableCaching
 @EnableScheduling
 public class SentryDemoApplication {
   public static void main(String[] args) {