---
title: "Automatic Instrumentation"
description: "Learn what transactions we capture after tracing is enabled."
url: https://docs.sentry.io/platforms/java/guides/spring/tracing/instrumentation/automatic-instrumentation/
---

# Automatic Instrumentation | Sentry for Spring

Capturing transactions requires that you first [set up tracing](https://docs.sentry.io/platforms/java/guides/spring/tracing.md) if you haven't already.

### [Spring MVC Integration](https://docs.sentry.io/platforms/java/guides/spring/tracing/instrumentation/automatic-instrumentation.md#spring-mvc-integration)

Sentry Spring integration, once enabled, captures each incoming Spring MVC HTTP request and turns it into a transaction with `SentryTracingFilter`. Transaction names follow pattern `<HTTP method> <Spring MVC route>`, for example for a request to a following controller:

```java
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

@RestController
class HelloController {

  @GetMapping("/person/{id}")
  Person person(@PathVariable Long id) {
    ...
  }
}
```

Each sampled request executed by this controller method will be turned into a transaction `GET /person/{id}`.

### [RestTemplate Instrumentation](https://docs.sentry.io/platforms/java/guides/spring/tracing/instrumentation/automatic-instrumentation.md#resttemplate-instrumentation)

Sentry Spring integration provides `SentrySpanClientHttpRequestInterceptor` that creates a span for each outgoing HTTP request executed with a `RestTemplate`. To use instrumented `RestTemplate` make sure to set interceptor on the `RestTemplate` bean:

```java
import io.sentry.IScopes;
import io.sentry.spring.tracing.SentrySpanClientHttpRequestInterceptor;
import java.util.Collections;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriTemplateHandler;

@Configuration
class AppConfig {

  @Bean
  RestTemplate restTemplate(IScopes scopes) {
    RestTemplate restTemplate = new RestTemplate();
    SentrySpanClientHttpRequestInterceptor sentryRestTemplateInterceptor =
        new SentrySpanClientHttpRequestInterceptor(scopes);
    restTemplate.setInterceptors(Collections.singletonList(sentryRestTemplateInterceptor));
    return restTemplate;
  }
}
```