make the setting provider awaiting

Signed-off-by: vahid torkaman <[email protected]>

OpenFeature/src/main/java/dev/openfeature/sdk/async/Extensions.kt

@@ -25,26 +25,26 @@ fun OpenFeatureClient.toAsync(): AsyncClient? {
     }
 }
 
+suspend fun OpenFeatureAPI.setProviderAndWait(
+    provider: FeatureProvider,
+    dispatcher: CoroutineDispatcher
+) {
+    setProvider(provider)
+    provider.awaitReady(dispatcher)
+}
+
 internal fun FeatureProvider.observeProviderReady() = observe<OpenFeatureEvents.ProviderReady>()
     .onStart {
         if (isProviderReady()) {
             this.emit(OpenFeatureEvents.ProviderReady)
         }
     }
 
-suspend fun OpenFeatureAPI.awaitProviderReady(
-    dispatcher: CoroutineDispatcher = Dispatchers.IO
-) {
-    val provider = getProvider()
-    requireNotNull(provider)
-    return provider.awaitProviderReady(dispatcher)
-}
-
-fun OpenFeatureAPI.observeEvents(): Flow<OpenFeatureEvents>? {
-    return getProvider()?.observe()
+inline fun <reified T : OpenFeatureEvents> OpenFeatureAPI.observeEvents(): Flow<T>? {
+    return getProvider()?.observe<T>()
 }
 
-suspend fun FeatureProvider.awaitProviderReady(
+suspend fun FeatureProvider.awaitReady(
     dispatcher: CoroutineDispatcher = Dispatchers.IO
 ) = suspendCancellableCoroutine { continuation ->
     val coroutineScope = CoroutineScope(dispatcher)

README.md

@@ -75,18 +75,12 @@ This will get a build from the head of the mentioned branch.
 
 ```kotlin
 // configure a provider and get client
-OpenFeatureAPI.setProvider(customProvider)
-val client = OpenFeatureAPI.getClient()
+coroutineScope.launch(Dispatchers.IO) {
+  OpenFeatureAPI.setProviderAndWait(customProvider)
+  val client = OpenFeatureAPI.getClient()
 
 // get a bool flag value
-client.getBooleanValue("boolFlag", default = false)
-
-// get a bool flag after "ready" signal from provider
-coroutineScope.launch {
-    WithContext(Dispatchers.IO) {
-        client.awaitProviderReady()
-    }
-    client.getBooleanValue("boolFlag", default = false)
+  client.getBooleanValue("boolFlag", default = false)
 }
 ```
 
@@ -163,9 +157,8 @@ Some providers support additional events, such as `PROVIDER_CONFIGURATION_CHANGE
 Please refer to the documentation of the provider you're using to see what events are supported.
 
 ```kotlin
-OpenFeatureAPI.eventsObserver()
-    .observe<OpenFeatureEvents.ProviderReady>()
-    .collect {
+OpenFeatureAPI.observeEvents<OpenFeatureEvents.ProviderReady>()
+    ?.collect {
         // do something once the provider is ready
     }
 ```