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Firebase async tasks to coroutines
Android: Is There A Way To Wait Until A Fragment Attaches To An Activity?Difference between thread and coroutine in KotlinWhat is the difference between launch/join and async/await in Kotlin coroutinesCan “experimental” Kotlin coroutines be used in production?What does suspend function mean in Kotlin CoroutineAndroid: Async Tasks and UIHow can I implement coroutines for a parallel taskKotlin coroutine async with delayKotlin Coroutines Async Await SequenceCoroutines: runBlocking vs coroutineScope
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty height:90px;width:728px;box-sizing:border-box;
I have used the suspend routine builder to make the Firebase Tasks's move away from async listener based code to coroutine-based code.
This is my suspendcoroutine via which I achieve the coroutine behavior.
suspend fun <T> Task<T>.awaitTask(): T =
suspendCoroutine continuation ->
addOnCompleteListener task ->
if (task.isSuccessful)
continuation.resume(task.result!!)//what to do if task.result is null
else
continuation.resumeWithException(task.exception!!)
This is how I invoke it
firebase.createUserWithEmailAndPassword(userCredentials.email!!, userCredentials.password!!).awaitTask()
All works well until we execute a task which has a possibility of a null result. Like .
firebase.currentUser?.updateProfile(profileUpdates)?.awaitTask()
Here upon successfully updation , task.result is null. In that case what should be passed to continuation.resume?.
android kotlin firebase-authentication kotlin-coroutines edited Mar 25 at 8:10
bugfreerammohan
1,3451215
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
add a comment |
I have used the suspend routine builder to make the Firebase Tasks's move away from async listener based code to coroutine-based code.
This is my suspendcoroutine via which I achieve the coroutine behavior.
suspend fun <T> Task<T>.awaitTask(): T =
suspendCoroutine continuation ->
addOnCompleteListener task ->
if (task.isSuccessful)
continuation.resume(task.result!!)//what to do if task.result is null
else
continuation.resumeWithException(task.exception!!)
This is how I invoke it
firebase.createUserWithEmailAndPassword(userCredentials.email!!, userCredentials.password!!).awaitTask()
All works well until we execute a task which has a possibility of a null result. Like .
firebase.currentUser?.updateProfile(profileUpdates)?.awaitTask()
Here upon successfully updation , task.result is null. In that case what should be passed to continuation.resume?.
android kotlin firebase-authentication kotlin-coroutines edited Mar 25 at 8:10
bugfreerammohan
1,3451215
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
add a comment |
I have used the suspend routine builder to make the Firebase Tasks's move away from async listener based code to coroutine-based code.
This is my suspendcoroutine via which I achieve the coroutine behavior.
suspend fun <T> Task<T>.awaitTask(): T =
suspendCoroutine continuation ->
addOnCompleteListener task ->
if (task.isSuccessful)
continuation.resume(task.result!!)//what to do if task.result is null
else
continuation.resumeWithException(task.exception!!)
This is how I invoke it
firebase.createUserWithEmailAndPassword(userCredentials.email!!, userCredentials.password!!).awaitTask()
All works well until we execute a task which has a possibility of a null result. Like .
firebase.currentUser?.updateProfile(profileUpdates)?.awaitTask()
Here upon successfully updation , task.result is null. In that case what should be passed to continuation.resume?.
android kotlin firebase-authentication kotlin-coroutines edited Mar 25 at 8:10
bugfreerammohan
1,3451215
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
I have used the suspend routine builder to make the Firebase Tasks's move away from async listener based code to coroutine-based code.
This is my suspendcoroutine via which I achieve the coroutine behavior.
suspend fun <T> Task<T>.awaitTask(): T =
suspendCoroutine continuation ->
addOnCompleteListener task ->
if (task.isSuccessful)
continuation.resume(task.result!!)//what to do if task.result is null
else
continuation.resumeWithException(task.exception!!)
This is how I invoke it
firebase.createUserWithEmailAndPassword(userCredentials.email!!, userCredentials.password!!).awaitTask()
All works well until we execute a task which has a possibility of a null result. Like .
firebase.currentUser?.updateProfile(profileUpdates)?.awaitTask()
Here upon successfully updation , task.result is null. In that case what should be passed to continuation.resume?.
android kotlin firebase-authentication kotlin-coroutines android kotlin firebase-authentication kotlin-coroutines edited Mar 25 at 8:10
bugfreerammohan
1,3451215
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
edited Mar 25 at 8:10
bugfreerammohan
1,3451215
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
edited Mar 25 at 8:10
bugfreerammohan
1,3451215
edited Mar 25 at 8:10
bugfreerammohan
1,3451215
edited Mar 25 at 8:10
bugfreerammohan
1,3451215
1,3451215
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
asked Mar 25 at 8:07
Muhammad Ahmed AbuTalibMuhammad Ahmed AbuTalib
1,46422233
1,46422233
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Your return type should be nullable because Task.getResult() is nullable:
suspend fun <T> Task<T>.await() : T? = ...
If you use it to get a non-nullable result, then enforce non-nullability at the use site and not inside the implementation.
However, why do you bother reimplementing this when it's already defined in kotlinx-coroutines-play-services?
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
Marko this is a revelation for me. About this prebuilt coroutines class. Thanks. Also Yup , my return type should have been nullable
– Muhammad Ahmed AbuTalib
Mar 25 at 8:19
add a comment |
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1 Answer
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Your return type should be nullable because Task.getResult() is nullable:
suspend fun <T> Task<T>.await() : T? = ...
If you use it to get a non-nullable result, then enforce non-nullability at the use site and not inside the implementation.
However, why do you bother reimplementing this when it's already defined in kotlinx-coroutines-play-services?
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
Marko this is a revelation for me. About this prebuilt coroutines class. Thanks. Also Yup , my return type should have been nullable
– Muhammad Ahmed AbuTalib
Mar 25 at 8:19
add a comment |
Your return type should be nullable because Task.getResult() is nullable:
suspend fun <T> Task<T>.await() : T? = ...
If you use it to get a non-nullable result, then enforce non-nullability at the use site and not inside the implementation.
However, why do you bother reimplementing this when it's already defined in kotlinx-coroutines-play-services?
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
Marko this is a revelation for me. About this prebuilt coroutines class. Thanks. Also Yup , my return type should have been nullable
– Muhammad Ahmed AbuTalib
Mar 25 at 8:19
add a comment |
Your return type should be nullable because Task.getResult() is nullable:
suspend fun <T> Task<T>.await() : T? = ...
If you use it to get a non-nullable result, then enforce non-nullability at the use site and not inside the implementation.
However, why do you bother reimplementing this when it's already defined in kotlinx-coroutines-play-services?
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
Your return type should be nullable because Task.getResult() is nullable:
suspend fun <T> Task<T>.await() : T? = ...
If you use it to get a non-nullable result, then enforce non-nullability at the use site and not inside the implementation.
However, why do you bother reimplementing this when it's already defined in kotlinx-coroutines-play-services?
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
answered Mar 25 at 8:16
Marko TopolnikMarko Topolnik
151k19209337
151k19209337
Marko this is a revelation for me. About this prebuilt coroutines class. Thanks. Also Yup , my return type should have been nullable
– Muhammad Ahmed AbuTalib
Mar 25 at 8:19
add a comment |
Marko this is a revelation for me. About this prebuilt coroutines class. Thanks. Also Yup , my return type should have been nullable
– Muhammad Ahmed AbuTalib
Mar 25 at 8:19
Marko this is a revelation for me. About this prebuilt coroutines class. Thanks. Also Yup , my return type should have been nullable
– Muhammad Ahmed AbuTalib
Mar 25 at 8:19
Marko this is a revelation for me. About this prebuilt coroutines class. Thanks. Also Yup , my return type should have been nullable
– Muhammad Ahmed AbuTalib
Mar 25 at 8:19
add a comment |
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