Help with favorites sync db locking

app/src/main/java/exh/GalleryAdder.kt

@@ -16,7 +16,7 @@ import eu.kanade.tachiyomi.source.online.all.EHentai
 import eu.kanade.tachiyomi.util.chapter.syncChaptersWithSource
 import exh.log.xLogStack
 import exh.source.getMainSource
-import exh.util.executeOnIO
+import exh.util.maybeRunBlocking
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 import uy.kohesive.injekt.injectLazy
@@ -53,7 +53,8 @@ class GalleryAdder {
         url: String,
         fav: Boolean = false,
         forceSource: UrlImportableSource? = null,
-        throttleFunc: suspend () -> Unit = {}
+        throttleFunc: suspend () -> Unit = {},
+        protectTrans: Boolean = false
     ): GalleryAddEvent {
         logger.d(context.getString(R.string.gallery_adder_importing_manga, url, fav.toString(), forceSource))
         try {
@@ -118,7 +119,7 @@ class GalleryAdder {
             } ?: return GalleryAddEvent.Fail.UnknownType(url, context)
 
             // Use manga in DB if possible, otherwise, make a new manga
-            val manga = db.getManga(cleanedMangaUrl, source.id).executeOnIO()
+            val manga = db.getManga(cleanedMangaUrl, source.id).executeAsBlocking()
                 ?: Manga.create(source.id).apply {
                     this.url = cleanedMangaUrl
                     title = realMangaUrl
@@ -146,6 +147,7 @@ class GalleryAdder {
 
             // Fetch and copy chapters
             try {
+                maybeRunBlocking(protectTrans) {
                     val chapterList = if (source is EHentai) {
                         source.getChapterList(manga.toMangaInfo(), throttleFunc)
                     } else {
@@ -155,13 +157,14 @@ class GalleryAdder {
                     if (chapterList.isNotEmpty()) {
                         syncChaptersWithSource(db, chapterList, manga, source)
                     }
+                }
             } catch (e: Exception) {
                 logger.w(context.getString(R.string.gallery_adder_chapter_fetch_error, manga.title), e)
                 return GalleryAddEvent.Fail.Error(url, context.getString(R.string.gallery_adder_chapter_fetch_error, url))
             }
 
             return if (cleanedChapterUrl != null) {
-                val chapter = db.getChapter(cleanedChapterUrl, manga.id!!).executeOnIO()
+                val chapter = db.getChapter(cleanedChapterUrl, manga.id!!).executeAsBlocking()
                 if (chapter != null) {
                     GalleryAddEvent.Success(url, manga, context, chapter)
                 } else {

app/src/main/java/exh/favorites/FavoritesSyncHelper.kt

@@ -14,6 +14,7 @@ import eu.kanade.tachiyomi.network.await
 import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.source.online.all.EHentai
 import eu.kanade.tachiyomi.util.lang.launchUI
+import eu.kanade.tachiyomi.util.lang.withIOContext
 import eu.kanade.tachiyomi.util.system.powerManager
 import eu.kanade.tachiyomi.util.system.toast
 import exh.GalleryAddEvent
@@ -24,7 +25,6 @@ import exh.log.xLog
 import exh.source.EH_SOURCE_ID
 import exh.source.EXH_SOURCE_ID
 import exh.source.isEhBasedManga
-import exh.util.executeOnIO
 import exh.util.ignore
 import exh.util.trans
 import exh.util.wifiManager
@@ -85,13 +85,13 @@ class FavoritesSyncHelper(val context: Context) {
 
         // Validate library state
         status.value = FavoritesSyncStatus.Processing(context.getString(R.string.favorites_sync_verifying_library), context = context)
-        val libraryManga = db.getLibraryMangas().executeOnIO()
+        val libraryManga = db.getLibraryMangas().executeAsBlocking()
         val seenManga = HashSet<Long>(libraryManga.size)
         libraryManga.forEach {
             if (!it.isEhBasedManga()) return@forEach
 
             if (it.id in seenManga) {
-                val inCategories = db.getCategoriesForManga(it).executeOnIO()
+                val inCategories = db.getCategoriesForManga(it).executeAsBlocking()
                 status.value = FavoritesSyncStatus.BadLibraryState.MangaInMultipleCategories(it, inCategories, context)
 
                 logger.w(context.getString(R.string.favorites_sync_manga_multiple_categories_error, it.id))
@@ -194,8 +194,8 @@ class FavoritesSyncHelper(val context: Context) {
         }
     }
 
-    private suspend fun applyRemoteCategories(categories: List<String>) {
+    private fun applyRemoteCategories(categories: List<String>) {
-        val localCategories = db.getCategories().executeOnIO()
+        val localCategories = db.getCategories().executeAsBlocking()
 
         val newLocalCategories = localCategories.toMutableList()
 
@@ -233,7 +233,7 @@ class FavoritesSyncHelper(val context: Context) {
 
         // Only insert categories if changed
         if (changed) {
-            db.insertCategories(newLocalCategories).executeOnIO()
+            db.insertCategories(newLocalCategories).executeAsBlocking()
         }
     }
 
@@ -267,7 +267,7 @@ class FavoritesSyncHelper(val context: Context) {
 
         for (i in 1..retryCount) {
             try {
-                val resp = exh.client.newCall(request).await()
+                val resp = withIOContext { exh.client.newCall(request).await() }
 
                 if (resp.isSuccessful) {
                     success = true
@@ -340,7 +340,7 @@ class FavoritesSyncHelper(val context: Context) {
                 db.getManga(url, EXH_SOURCE_ID),
                 db.getManga(url, EH_SOURCE_ID)
             ).forEach {
-                val manga = it.executeOnIO()
+                val manga = it.executeAsBlocking()
 
                 if (manga?.favorite == true) {
                     manga.favorite = false
@@ -357,7 +357,7 @@ class FavoritesSyncHelper(val context: Context) {
         }
 
         val insertedMangaCategories = mutableListOf<Pair<MangaCategory, Manga>>()
-        val categories = db.getCategories().executeOnIO()
+        val categories = db.getCategories().executeAsBlocking()
 
         // Apply additions
         throttleManager.resetThrottle()
@@ -376,7 +376,8 @@ class FavoritesSyncHelper(val context: Context) {
                 "${exh.baseUrl}${it.getUrl()}",
                 true,
                 exh,
-                throttleManager::throttle
+                throttleManager::throttle,
+                true
             )
 
             if (result is GalleryAddEvent.Fail) {

app/src/main/java/exh/favorites/LocalFavoritesStorage.kt

@@ -5,7 +5,6 @@ import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.source.online.all.EHentai
 import exh.metadata.metadata.EHentaiSearchMetadata
 import exh.source.isEhBasedManga
-import exh.util.executeOnIO
 import io.realm.Realm
 import io.realm.RealmConfiguration
 import uy.kohesive.injekt.injectLazy
@@ -20,13 +19,13 @@ class LocalFavoritesStorage {
 
     fun getRealm(): Realm = Realm.getInstance(realmConfig)
 
-    suspend fun getChangedDbEntries(realm: Realm) =
+    fun getChangedDbEntries(realm: Realm) =
         getChangedEntries(
             realm,
             parseToFavoriteEntries(
                 loadDbCategories(
                     db.getFavoriteMangas()
-                        .executeOnIO()
+                        .executeAsBlocking()
                         .asSequence()
                 )
             )
@@ -45,11 +44,11 @@ class LocalFavoritesStorage {
             )
         )
 
-    suspend fun snapshotEntries(realm: Realm) {
+    fun snapshotEntries(realm: Realm) {
         val dbMangas = parseToFavoriteEntries(
             loadDbCategories(
                 db.getFavoriteMangas()
-                    .executeOnIO()
+                    .executeAsBlocking()
                     .asSequence()
             )
         )
@@ -97,8 +96,8 @@ class LocalFavoritesStorage {
                 it.category == entry.category
         }
 
-    private suspend fun loadDbCategories(manga: Sequence<Manga>): Sequence<Pair<Int, Manga>> {
+    private fun loadDbCategories(manga: Sequence<Manga>): Sequence<Pair<Int, Manga>> {
-        val dbCategories = db.getCategories().executeOnIO()
+        val dbCategories = db.getCategories().executeAsBlocking()
 
         return manga.filter(this::validateDbManga).mapNotNull {
             val category = db.getCategoriesForManga(it).executeAsBlocking()

app/src/main/java/exh/util/CoroutineUtil.kt

@@ -3,8 +3,25 @@ package exh.util
 import kotlinx.coroutines.ensureActive
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.runBlocking
+import kotlin.contracts.ExperimentalContracts
+import kotlin.contracts.InvocationKind
+import kotlin.contracts.contract
 import kotlin.coroutines.coroutineContext
 
 fun <T> Flow<T>.cancellable() = onEach {
     coroutineContext.ensureActive()
 }
+
+@Suppress("BlockingMethodInNonBlockingContext")
+@OptIn(ExperimentalContracts::class)
+suspend inline fun <T> maybeRunBlocking(runBlocking: Boolean, crossinline block: suspend () -> T): T {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    return if (runBlocking) {
+        runBlocking { block() }
+    } else {
+        block()
+    }
+}