# Firebase Firestore database listener to GlobalScope.rxFlowable

**URL:** <https://discuss.kotlinlang.org/t/firebase-firestore-database-listener-to-globalscope-rxflowable/11050>\
**Category:** Support\
**Created:** [January 7, 2019, 11:12am UTC](https://discuss.kotlinlang.org/t/firebase-firestore-database-listener-to-globalscope-rxflowable/11050 "2019-01-07T11:12:54Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![muhammad.elkady](https://avatars.discourse-cdn.com/v4/letter/m/c6cbf5/32.png) [@muhammad.elkady](https://discuss.kotlinlang.org/u/muhammad.elkady)\
**Post date:** [January 7, 2019, 11:12am UTC](https://discuss.kotlinlang.org/t/firebase-firestore-database-listener-to-globalscope-rxflowable/11050/1 "2019-01-07T11:12:54Z")

</div>

How to wrap Firebase Firestore database listeners to a GlobalScope.rxFlowable. Given that Firestore callback called every time when the database updated.

```
 private fun <T> Query.realTimeUpdates(klass: Class<T>): Flowable<FirestoreResult> = GlobalScope.rxFlowable {
        suspendCancellableCoroutine {
            addSnapshotListener { collectionSnapshot: QuerySnapshot?, _: FirebaseFirestoreException? ->
                launch {
                    logD(TAG, "realTimeUpdates query -> in thread ${Thread.currentThread().name}")
                    if (collectionSnapshot != null && !collectionSnapshot.isEmpty)
                        send(FirestoreResult.Success(collectionSnapshot.toObjects(klass)))
                    else send(FirestoreResult.Error("Error : unknown error."))
                }
            }
        }
    }

```

Thanks