feat(samples): [Cache Tracing 4] Add cache tracing e2e sample

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: adinauer

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

@@ -0,0 +1,34 @@
+package io.sentry.samples.spring.boot4;
+
+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-4/src/main/java/io/sentry/samples/spring/boot4/SentryDemoApplication.java

@@ -9,6 +9,9 @@
 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;
@@ -19,12 +22,18 @@
 import org.springframework.web.reactive.function.client.WebClient;
 
 @SpringBootApplication
+@EnableCaching
 @EnableScheduling
 public class SentryDemoApplication {
   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/java/io/sentry/samples/spring/boot4/TodoService.java

@@ -0,0 +1,29 @@
+package io.sentry.samples.spring.boot4;
+
+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-4/src/main/resources/application.properties

@@ -20,6 +20,7 @@ sentry.logs.enabled=true
 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
 
 # Uncomment and set to true to enable aot compatibility
 # This flag disables all AOP related features (i.e. @SentryTransaction, @SentrySpan)

sentry-samples/sentry-samples-spring-boot-4/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-system-test-support/api/sentry-system-test-support.api

@@ -548,7 +548,9 @@ public final class io/sentry/systemtest/util/RestTestClient : io/sentry/systemte
 	public static synthetic fun createPerson$default (Lio/sentry/systemtest/util/RestTestClient;Lio/sentry/systemtest/Person;Ljava/util/Map;ILjava/lang/Object;)Lio/sentry/systemtest/Person;
 	public final fun createPersonDistributedTracing (Lio/sentry/systemtest/Person;Ljava/util/Map;)Lio/sentry/systemtest/Person;
 	public static synthetic fun createPersonDistributedTracing$default (Lio/sentry/systemtest/util/RestTestClient;Lio/sentry/systemtest/Person;Ljava/util/Map;ILjava/lang/Object;)Lio/sentry/systemtest/Person;
+	public final fun deleteCachedTodo (J)V
 	public final fun errorWithFeatureFlag (Ljava/lang/String;)Ljava/lang/String;
+	public final fun getCachedTodo (J)Lio/sentry/systemtest/Todo;
 	public final fun getCountMetric ()Ljava/lang/String;
 	public final fun getDistributionMetric (J)Ljava/lang/String;
 	public final fun getGaugeMetric (J)Ljava/lang/String;
@@ -558,6 +560,7 @@ public final class io/sentry/systemtest/util/RestTestClient : io/sentry/systemte
 	public final fun getTodo (J)Lio/sentry/systemtest/Todo;
 	public final fun getTodoRestClient (J)Lio/sentry/systemtest/Todo;
 	public final fun getTodoWebclient (J)Lio/sentry/systemtest/Todo;
+	public final fun saveCachedTodo (Lio/sentry/systemtest/Todo;)Lio/sentry/systemtest/Todo;
 }
 
 public final class io/sentry/systemtest/util/SentryMockServerClient : io/sentry/systemtest/util/LoggingInsecureRestClient {

sentry-system-test-support/src/main/kotlin/io/sentry/systemtest/util/RestTestClient.kt

@@ -50,6 +50,24 @@ class RestTestClient(private val backendBaseUrl: String) : LoggingInsecureRestCl
     return callTyped(request, true)
   }
 
+  fun getCachedTodo(id: Long): Todo? {
+    val request = Request.Builder().url("$backendBaseUrl/cache/$id")
+
+    return callTyped(request, true)
+  }
+
+  fun saveCachedTodo(todo: Todo): Todo? {
+    val request = Request.Builder().url("$backendBaseUrl/cache/").post(toRequestBody(todo))
+
+    return callTyped(request, true)
+  }
+
+  fun deleteCachedTodo(id: Long) {
+    val request = Request.Builder().url("$backendBaseUrl/cache/$id").delete()
+
+    call(request, true)
+  }
+
   fun checkFeatureFlag(flagKey: String): FeatureFlagResponse? {
     val request = Request.Builder().url("$backendBaseUrl/feature-flag/check/$flagKey")