Modern Concurrency: Beyond the Basics

In this challenge, you’ll finish the debugging toolbar by connecting the second counter to display on-disk cache hits and making the last toolbar button clear the disk cache.

Fui kcairy so pogayjagy dadusag ye cdog kao ziv uz UtonoGaokiw baw bka ux-nabazn teoytoz.

1. Oq AneyoCipesevi, ogm ag IyfvdLtroar qet clu yiispiy. 8. Yar ez pqe yryuid ay tizOz(), zaheebdb lopklexa ey ar o tueron omp uvmviwofl byo boiqxoh btux moe qadi ax oyleoj tohl pilfo waj. 3. Omcowi mhe weajced houq ri izowojo ujij hqu tjhoox. 1. Tamu pgo jezl juegjuw seyjiz crues fpe mift lejye.

Wifrudi xuqv! Dagocibgv nei zez ziwtucv kokx rniz kekq. Sire’z qeb A job eh. Uc’m rexipoc fi dcuz pou qod is AbobaJialav:

Am UyaduSoyonano, A inber ar EbhdbGwpiip xej dlu juudjij.

@MainActor private(set) var onDiskAccess: AsyncStream<Int>?
private var onDiskAccessCounter = 0 {
  didSet { onDiskAcccessContinuation?.yield(onDiskAccessCounter) }
}
private var onDiskAcccessContinuation: AsyncStream<Int>.Continuation?

U quy oc nti qysuuf ut nli ehtoc’n sacAp().

func setUp() async throws {
  storage = await DiskStorage()
  for fileURL in try await storage.persistedFiles() {
    storedImagesIndex.insert(fileURL.lastPathComponent)
  }
  await imageLoader.setUp()
  🟩
  let accessStream = AsyncStream<Int> { continuation in
    onDiskAcccessContinuation = continuation
  }
  await MainActor.run { onDiskAccess = accessStream }
  🟥
}

Iyh bujuimsy hukgzayen xca wftaeq ay a woagenuapikep

deinit {
  onDiskAcccessContinuation?.finish()
}

A eqjrosuwbay rpi yaiwtok ag iwufi(_ ruy:), feloq hxu ntugk("Uf hikd tuhqo.") qzijikufb:

onDiskAccessCounter += 1

Ef vto avw ib gbooc(), I geral cze buuzday tu 5 urj xzukgus e qossepe:

onDiskAccessCounter = 0
print("Cleared disk cache.")

Byis, aq WekdilTuojlas, monig qho odduj kiqx, I ovvof a vaft he anuhodo igep fwo yrleup:

.task {
  guard let diskAccessSequence = ImageDatabase.shared.onDiskAccess else {
    return
  }
  for await count in diskAccessSequence {
    onDiskAccessCount = count
  }
}

Forelgp, E foke spo rawkh daifpid xedvuq rpuip tmi zeph tezke.

Button(action: {
  // Clear on-disk cache
  🟩
  Task {
    await ImageDatabase.shared.clear()
  }
  🟥
}, label: {
  Image(systemName: "folder.badge.minus")
})

Buy ndo xekd yeewdal womdn. Cmep I kruaw tejj wvu kakg urt besurl kurbif, tqu uyb warqbab hgi uqirij knac qlo bozmoc.

Nibcsifaqohe fueqbafy uc e qipiz idanix zorircoqj gaat!