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authorAllan Wang <me@allanwang.ca>2019-01-04 01:56:04 -0500
committerAllan Wang <me@allanwang.ca>2019-01-04 01:56:04 -0500
commit339ce9db98c1e6dfb1c8d69f81806680b1efa666 (patch)
tree75b3366004ddf08359490d4d4b83d63366c0a68d /app/src/main/kotlin/com
parent8c77e02e89dfec7bff04a397dfc82613ccd1242a (diff)
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Convert global continuations to completable deferred
Diffstat (limited to 'app/src/main/kotlin/com')
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/FbRequest.kt16
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt2
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/fragments/RecyclerFragments.kt2
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/kotlin/Flyweight.kt37
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/services/FrostRequestService.kt2
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/web/LoginWebView.kt30
6 files changed, 39 insertions, 50 deletions
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/FbRequest.kt b/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/FbRequest.kt
index 53ea6e67..3663f908 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/FbRequest.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/FbRequest.kt
@@ -45,22 +45,6 @@ val fbAuth = Flyweight<String, RequestAuth>(GlobalScope, 100, 3600000 /* an hour
}
/**
- * Synchronously fetch [RequestAuth] from cookie
- * [action] will only be called if a valid auth is found.
- * Otherwise, [fail] will be called
- */
-fun String?.fbRequest(fail: () -> Unit = {}, action: RequestAuth.() -> Unit) {
- if (this == null) return fail()
- try {
- val auth = runBlocking { fbAuth.fetch(this@fbRequest) }
- auth.action()
- } catch (e: Exception) {
- L.e { "Failed auth for ${hashCode()}: ${e.message}" }
- fail()
- }
-}
-
-/**
* Underlying container for all fb requests
*/
data class RequestAuth(
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt b/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt
index ee18e15e..36dff6ff 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/facebook/requests/Images.kt
@@ -133,7 +133,7 @@ class HdImageFetcher(private val model: HdImageMaybe) : DataFetcher<InputStream>
val result: Result<InputStream?> = runCatching {
runBlocking {
withTimeout(20000L) {
- val auth = fbAuth.fetch(model.cookie)
+ val auth = fbAuth.fetch(model.cookie).await()
if (cancelled) throw RuntimeException("Cancelled")
val url = auth.getFullSizedImage(model.id).invoke() ?: throw RuntimeException("Null url")
if (cancelled) throw RuntimeException("Cancelled")
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/fragments/RecyclerFragments.kt b/app/src/main/kotlin/com/pitchedapps/frost/fragments/RecyclerFragments.kt
index f7ed9937..d9d518b1 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/fragments/RecyclerFragments.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/fragments/RecyclerFragments.kt
@@ -74,7 +74,7 @@ class MenuFragment : GenericRecyclerFragment<MenuItemData, IItem<*, *>>() {
override suspend fun reloadImpl(progress: (Int) -> Unit): List<MenuItemData>? = withContext(Dispatchers.IO) {
val cookie = FbCookie.webCookie ?: return@withContext null
progress(10)
- val auth = fbAuth.fetch(cookie)
+ val auth = fbAuth.fetch(cookie).await()
progress(30)
val data = auth.getMenuData().invoke() ?: return@withContext null
if (data.data.isEmpty()) return@withContext null
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/kotlin/Flyweight.kt b/app/src/main/kotlin/com/pitchedapps/frost/kotlin/Flyweight.kt
index 7ac80147..a22022de 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/kotlin/Flyweight.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/kotlin/Flyweight.kt
@@ -17,6 +17,7 @@
package com.pitchedapps.frost.kotlin
import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.CompletableDeferred
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.Job
@@ -25,7 +26,6 @@ import kotlinx.coroutines.isActive
import kotlinx.coroutines.launch
import kotlinx.coroutines.selects.select
import java.util.concurrent.ConcurrentHashMap
-import kotlin.coroutines.Continuation
import kotlin.coroutines.resumeWithException
import kotlin.coroutines.suspendCoroutine
@@ -44,7 +44,7 @@ class Flyweight<K, V>(
) {
// Receives a key and a pending request
- private val actionChannel = Channel<Pair<K, Continuation<V>>>(capacity)
+ private val actionChannel = Channel<Pair<K, CompletableDeferred<V>>>(capacity)
// Receives a key to invalidate the associated value
private val invalidatorChannel = Channel<K>(capacity)
// Receives a key to fetch the value
@@ -58,10 +58,17 @@ class Flyweight<K, V>(
private val resultMap: MutableMap<K, Result<V>> = mutableMapOf()
// Keeps track of unfulfilled actions
// Note that the explicit type is very important here. See https://youtrack.jetbrains.net/issue/KT-18053
- private val pendingMap: MutableMap<K, MutableList<Continuation<V>>> = ConcurrentHashMap()
+ private val pendingMap: MutableMap<K, MutableList<CompletableDeferred<V>>> = ConcurrentHashMap()
private val job: Job
+ private fun CompletableDeferred<V>.completeWith(result: Result<V>) {
+ if (result.isSuccess)
+ complete(result.getOrNull()!!)
+ else
+ completeExceptionally(result.exceptionOrNull()!!)
+ }
+
init {
job = scope.launch(Dispatchers.IO) {
launch {
@@ -70,15 +77,15 @@ class Flyweight<K, V>(
/*
* New request received. Continuation should be fulfilled eventually
*/
- actionChannel.onReceive { (key, continuation) ->
+ actionChannel.onReceive { (key, completable) ->
val lastUpdate = conditionMap[key]
val lastResult = resultMap[key]
// Valid value, retrieved within acceptable time
if (lastResult != null && lastUpdate != null && System.currentTimeMillis() - lastUpdate < maxAge) {
- continuation.resumeWith(lastResult)
+ completable.completeWith(lastResult)
} else {
val valueRequestPending = key in pendingMap
- pendingMap.getOrPut(key) { mutableListOf() }.add(continuation)
+ pendingMap.getOrPut(key) { mutableListOf() }.add(completable)
if (!valueRequestPending)
requesterChannel.send(key)
}
@@ -106,7 +113,7 @@ class Flyweight<K, V>(
conditionMap[key] = System.currentTimeMillis()
resultMap[key] = result
pendingMap.remove(key)?.forEach {
- it.resumeWith(result)
+ it.completeWith(result)
}
}
}
@@ -126,11 +133,15 @@ class Flyweight<K, V>(
}
}
- suspend fun fetch(key: K): V = suspendCoroutine {
- if (!job.isActive) it.resumeWithException(IllegalStateException("Flyweight is not active"))
- else scope.launch {
- actionChannel.send(key to it)
- }
+ /**
+ * Queues the request, and returns a completable once it is sent to a channel.
+ * The fetcher will only be suspended if the channels are full
+ */
+ suspend fun fetch(key: K): CompletableDeferred<V> {
+ val completable = CompletableDeferred<V>(job)
+ if (!job.isActive) completable.completeExceptionally(IllegalStateException("Flyweight is not active"))
+ else actionChannel.send(key to completable)
+ return completable
}
suspend fun invalidate(key: K) {
@@ -141,7 +152,7 @@ class Flyweight<K, V>(
job.cancel()
if (pendingMap.isNotEmpty()) {
val error = CancellationException("Flyweight cancelled")
- pendingMap.values.flatten().forEach { it.resumeWithException(error) }
+ pendingMap.values.flatten().forEach { it.completeExceptionally(error) }
pendingMap.clear()
}
actionChannel.close()
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/services/FrostRequestService.kt b/app/src/main/kotlin/com/pitchedapps/frost/services/FrostRequestService.kt
index c88f3946..a8ecb27d 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/services/FrostRequestService.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/services/FrostRequestService.kt
@@ -179,7 +179,7 @@ class FrostRequestService : BaseJobService() {
}
launch(Dispatchers.IO) {
try {
- val auth = fbAuth.fetch(cookie)
+ val auth = fbAuth.fetch(cookie).await()
command.invoke(auth, bundle)
L.d {
"Finished frost service for ${command.name} in ${System.currentTimeMillis() - startTime} ms"
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/web/LoginWebView.kt b/app/src/main/kotlin/com/pitchedapps/frost/web/LoginWebView.kt
index 8132382a..c21ce93b 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/web/LoginWebView.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/web/LoginWebView.kt
@@ -28,7 +28,7 @@ import android.webkit.WebResourceRequest
import android.webkit.WebView
import ca.allanwang.kau.utils.fadeIn
import ca.allanwang.kau.utils.isVisible
-import ca.allanwang.kau.utils.withMainContext
+import ca.allanwang.kau.utils.launchMain
import com.pitchedapps.frost.dbflow.CookieModel
import com.pitchedapps.frost.facebook.FB_LOGIN_URL
import com.pitchedapps.frost.facebook.FB_USER_MATCHER
@@ -40,10 +40,8 @@ import com.pitchedapps.frost.injectors.jsInject
import com.pitchedapps.frost.utils.L
import com.pitchedapps.frost.utils.Prefs
import com.pitchedapps.frost.utils.isFacebookUrl
+import kotlinx.coroutines.CompletableDeferred
import kotlinx.coroutines.coroutineScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.suspendCancellableCoroutine
-import kotlin.coroutines.resume
/**
* Created by Allan Wang on 2017-05-29.
@@ -54,7 +52,7 @@ class LoginWebView @JvmOverloads constructor(
defStyleAttr: Int = 0
) : WebView(context, attrs, defStyleAttr) {
- private lateinit var loginCallback: (CookieModel) -> Unit
+ private val completable: CompletableDeferred<CookieModel> = CompletableDeferred()
private lateinit var progressCallback: (Int) -> Unit
@SuppressLint("SetJavaScriptEnabled")
@@ -65,19 +63,15 @@ class LoginWebView @JvmOverloads constructor(
webChromeClient = LoginChromeClient()
}
- suspend fun loadLogin(progressCallback: (Int) -> Unit): CookieModel = withMainContext {
- coroutineScope {
- suspendCancellableCoroutine<CookieModel> { cont ->
- this@LoginWebView.progressCallback = progressCallback
- this@LoginWebView.loginCallback = { cont.resume(it) }
- L.d { "Begin loading login" }
- launch {
- FbCookie.reset()
- setupWebview()
- loadUrl(FB_LOGIN_URL)
- }
- }
+ suspend fun loadLogin(progressCallback: (Int) -> Unit): CompletableDeferred<CookieModel> = coroutineScope {
+ this@LoginWebView.progressCallback = progressCallback
+ L.d { "Begin loading login" }
+ launchMain {
+ FbCookie.reset()
+ setupWebview()
+ loadUrl(FB_LOGIN_URL)
}
+ completable
}
private inner class LoginClient : BaseWebViewClient() {
@@ -86,7 +80,7 @@ class LoginWebView @JvmOverloads constructor(
super.onPageFinished(view, url)
val cookieModel = checkForLogin(url)
if (cookieModel != null)
- loginCallback(cookieModel)
+ completable.complete(cookieModel)
if (!view.isVisible) view.fadeIn()
}