---
name: "mongoc_client_pool_set_apm_callbacks"
section: "3"
platform: "linux"
package: "libmongoc-doc"
version: "1.30.4-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mongoc_client_pool_set_apm_callbacks"
---

# mongoc\_client\_pool\_set\_apm\_callbacks(3)

## SYNOPSIS

```
bool
mongoc_client_pool_set_apm_callbacks (mongoc_client_pool_t *pool,
                                      mongoc_apm_callbacks_t *callbacks,
                                      void *context);
```

Register a set of callbacks to receive Application Performance Monitoring events.

The **callbacks** are copied by the pool and may be safely destroyed by the caller after this API call completes.  If a **context** is passed, it is the application's responsibility to ensure **context** remains valid for the lifetime of the pool.

## PARAMETERS

- •

  **pool**: A *mongoc\_client\_pool\_t*.

- •

  **callbacks**: A *mongoc\_apm\_callbacks\_t*.

- •

  **context**: Optional pointer to include with each event notification.

## RETURNS

Returns true on success. If any arguments are invalid, returns false and logs an error.

## THREAD SAFETY

This function can only be called once on a pool, and must be called before the first call to *mongoc\_client\_pool\_pop()*.

**SEE ALSO:**

```
Introduction to Application Performance Monitoring
```

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.