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Integrate retryability for outgoing mutation queue
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| // | ||
| // Copyright 2018-2019 Amazon.com, | ||
| // Inc. or its affiliates. All Rights Reserved. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
|
|
||
| import Foundation | ||
|
|
||
| extension DispatchSource { | ||
| /// Convenience function to encapsulate creation of a one-off DispatchSourceTimer for different versions of Swift | ||
| /// | ||
| /// - Parameters: | ||
| /// - interval: The future DispatchInterval at which to fire the timer | ||
| /// - queue: The queue on which the timer should perform its block | ||
| /// - block: The block to invoke when the timer is fired | ||
| /// - Returns: The unstarted timer | ||
| public static func makeOneOffDispatchSourceTimer(interval: DispatchTimeInterval, | ||
| queue: DispatchQueue, | ||
| block: @escaping () -> Void ) -> DispatchSourceTimer { | ||
| let deadline = DispatchTime.now() + interval | ||
| return makeOneOffDispatchSourceTimer(deadline: deadline, queue: queue, block: block) | ||
| } | ||
|
|
||
| /// Convenience function to encapsulate creation of a one-off DispatchSourceTimer for different versions of Swift | ||
| /// - Parameters: | ||
| /// - deadline: The time to fire the timer | ||
| /// - queue: The queue on which the timer should perform its block | ||
| /// - block: The block to invoke when the timer is fired | ||
| public static func makeOneOffDispatchSourceTimer(deadline: DispatchTime, | ||
| queue: DispatchQueue, | ||
| block: @escaping () -> Void ) -> DispatchSourceTimer { | ||
| let timer = DispatchSource.makeTimerSource(flags: DispatchSource.TimerFlags(rawValue: 0), queue: queue) | ||
| #if swift(>=4) | ||
| timer.schedule(deadline: deadline) | ||
| #else | ||
| timer.scheduleOneshot(deadline: deadline) | ||
| #endif | ||
| timer.setEventHandler(handler: block) | ||
| return timer | ||
| } | ||
| } |
77 changes: 77 additions & 0 deletions
77
...taStoreCategoryPlugin/Sync/MutationSync/OutgoingMutationQueue/MutationRetryNotifier.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| // | ||
| // Copyright 2018-2019 Amazon.com, | ||
| // Inc. or its affiliates. All Rights Reserved. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
|
|
||
| import Amplify | ||
| import Foundation | ||
| import AWSPluginsCore | ||
| import Combine | ||
|
|
||
| @available(iOS 13.0, *) | ||
| final class MutationRetryNotifier { | ||
| private var nextSyncTimer: DispatchSourceTimer? | ||
| private var handlerQueue = DispatchQueue.global(qos: .default) | ||
| var retryMutationCallback: () -> Void | ||
| private var reachabilitySubscription: Subscription? | ||
|
|
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| init(advice: RequestRetryAdvice, | ||
| networkReachabilityPublisher: AnyPublisher<ReachabilityUpdate, DataStoreError>?, | ||
| retryMutationCallback: @escaping BasicClosure) { | ||
| self.retryMutationCallback = retryMutationCallback | ||
|
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| networkReachabilityPublisher?.subscribe(self) | ||
|
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| let deadline = DispatchTime.now() + advice.retryInterval | ||
| scheduleTimer(at: deadline) | ||
| } | ||
|
|
||
| deinit { | ||
| cancel() | ||
| } | ||
|
|
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| private func scheduleTimer(at deadline: DispatchTime) { | ||
| nextSyncTimer = DispatchSource.makeOneOffDispatchSourceTimer(deadline: deadline, queue: handlerQueue) { | ||
| self.notifyCallback() | ||
| } | ||
| nextSyncTimer?.resume() | ||
| } | ||
|
|
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| func cancel() { | ||
| reachabilitySubscription?.cancel() | ||
| nextSyncTimer?.cancel() | ||
| } | ||
|
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| func notifyCallback() { | ||
| // Call the cancel routine as the purpose of retry is fulfilled | ||
| cancel() | ||
| retryMutationCallback() | ||
| } | ||
| } | ||
|
|
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| @available(iOS 13.0, *) | ||
| extension MutationRetryNotifier: Subscriber { | ||
| func receive(subscription: Subscription) { | ||
| log.verbose(#function) | ||
| reachabilitySubscription = subscription | ||
| subscription.request(.unlimited) | ||
| } | ||
|
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| func receive(_ reachabilityUpdate: ReachabilityUpdate) -> Subscribers.Demand { | ||
| if reachabilityUpdate.isOnline { | ||
| notifyCallback() | ||
| return .none | ||
| } | ||
| return .unlimited | ||
| } | ||
|
|
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| func receive(completion: Subscribers.Completion<DataStoreError>) { | ||
| log.verbose(#function) | ||
| reachabilitySubscription?.cancel() | ||
| } | ||
| } | ||
|
|
||
| @available(iOS 13.0, *) | ||
| extension MutationRetryNotifier: DefaultLogger { } |
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