Bartosz Polaczyk
59 lines
2.4 KiB
Swift
59 lines
2.4 KiB
Swift
// Copyright (c) 2021 Spotify AB.
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//
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// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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import Foundation
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/// Factory for the RemoteNetworkClient
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/// Switches between "single remote" and "mulitple upstream remotes" implementations
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class RemoteNetworkClientAbstractFactory {
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private let mode: Mode
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private let downloadStreamURL: URL
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private let upstreamStreamURL: [URL]
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private let networkClient: NetworkClient
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private let urlBuilderFactory: (URL) throws -> URLBuilder
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init(mode: Mode, downloadStreamURL: URL, upstreamStreamURL: [URL], networkClient: NetworkClient, urlBuilderFactory: @escaping (URL) throws -> URLBuilder) {
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self.mode = mode
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self.downloadStreamURL = downloadStreamURL
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self.upstreamStreamURL = upstreamStreamURL
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self.networkClient = networkClient
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self.urlBuilderFactory = urlBuilderFactory
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}
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/// Builds remote network client that uses concrete remote address for download
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/// and multiple uploads (`.producer` mode)
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func build() throws -> RemoteNetworkClient {
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let downloadURLBuilder = try urlBuilderFactory(downloadStreamURL)
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guard !upstreamStreamURL.isEmpty else {
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return RemoteNetworkClientImpl(networkClient, downloadURLBuilder)
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}
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switch mode {
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case .producer, .producerFast:
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let upstreamBuilders = try upstreamStreamURL.map(urlBuilderFactory)
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return ReplicatedRemotesNetworkClient(
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networkClient,
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download: downloadURLBuilder,
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uploads: upstreamBuilders
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)
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case .consumer:
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return RemoteNetworkClientImpl(networkClient, downloadURLBuilder)
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}
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}
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}
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