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actix-website/content/docs/sentry.md
2018-06-19 19:50:00 +02:00

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---
title: Sentry
menu: docs_patterns
weight: 1020
---
# Sentry Crash Reporting
[Sentry](https://sentry.io/) is a crash reporting system that supports the
failure crate which is the base of the actix error reporting. With a
middleware it's possible to automatically report server errors to Sentry.
# Middleware
This middleware captures any error in the server error range (500 - 599)
and sends the attached error to sentry with its stacktrace.
To use the middleware the [sentry crate](https://crates.io/crates/sentry) needs to be
initialized and configured and the [sentry-actix middleware](https://crates.io/crates/sentry-actix)
needs to be added. Additionally it makes sense to also register the panic handler
to be informed about hard panics.
```rust
extern crate sentry;
extern crate sentry_actix;
use sentry_actix::SentryMiddleware;
use std::env;
fn main() {
sentry::init("SENTRY_DSN_GOES_HERE");
env::set_var("RUST_BACKTRACE", "1");
sentry::integrations::panic::register_panic_handler();
let mut app = App::with_state(state)
.middleware(SentryMiddleware::new())
// ...
}
```
# Reusing the Hub
If you use this integration the default sentry hub (`Hub::current()`) is typically the wrong one.
To get the request specific one you need to use the `ActixWebHubExt` trait:
```rust
use sentry::{Hub, Level};
use sentry_actix::ActixWebHubExt;
let hub = Hub::from_request(req);
hub.capture_message("Something is not well", Level::Warning);
```
The hub can also be made current for the duration of a call. Then `Hub::current()` works correctly
until the end of the `run` block.
```rust
use sentry::{Hub, Level};
use sentry_actix::ActixWebHubExt;
let hub = Hub::from_request(req);
Hub::run(hub, || {
sentry::capture_message("Something is not well", Level::Warning);
});
```