CODESAMPLE
Cluster-based Architecture - Swift
The Cluster-based Architecture pattern organizes components into independent, interchangeable “clusters” each managing a specific aspect of the application. This promotes modularity, scalability, and easier maintenance. A central coordinator or manager (often a facade) interacts with these clusters, shielding the core application from their internal complexities.
This Swift example demonstrates a simple cluster setup for handling different media types (Image, Video, Audio). Each media type has its own MediaCluster conforming to a common protocol, responsible for loading and processing. A MediaManager acts as the coordinator, delegating to the appropriate cluster based on the file extension. This uses protocols for abstraction, a common Swift practice, and leverages enums for clear type representation which fits well with Swift’s strong typing and safety focus.
// Define a common protocol for Media Clusters
protocol MediaCluster {
func load(filePath: String) -> Data?
func process(data: Data) -> String
}
// Image Cluster
class ImageCluster: MediaCluster {
func load(filePath: String) -> Data? {
print("Loading image from: \(filePath)")
return Data(contentsOfFile: filePath) // Simplified for example
}
func process(data: Data) -> String {
print("Processing image data")
return "Image processed successfully."
}
}
// Video Cluster
class VideoCluster: MediaCluster {
func load(filePath: String) -> Data? {
print("Loading video from: \(filePath)")
return Data(contentsOfFile: filePath) // Simplified for example
}
func process(data: Data) -> String {
print("Processing video data")
return "Video processed successfully."
}
}
// Audio Cluster
class AudioCluster: MediaCluster {
func load(filePath: String) -> Data? {
print("Loading audio from: \(filePath)")
return Data(contentsOfFile: filePath) // Simplified for example
}
func process(data: Data) -> String {
print("Processing audio data")
return "Audio processed successfully."
}
}
// Media Manager - the Coordinator
class MediaManager {
private var imageCluster: ImageCluster = ImageCluster()
private var videoCluster: VideoCluster = VideoCluster()
private var audioCluster: AudioCluster = AudioCluster()
enum MediaType {
case image, video, audio, unknown
}
func getMediaType(filePath: String) -> MediaType {
let extensionValue = filePath.split(separator: ".").last?.lowercased()
switch extensionValue {
case "jpg", "jpeg", "png":
return .image
case "mp4", "mov":
return .video
case "mp3", "wav":
return .audio
default:
return .unknown
}
}
func processMedia(filePath: String) -> String {
let mediaType = getMediaType(filePath: filePath)
guard let data = loadMedia(filePath: filePath, type: mediaType) else {
return "Failed to load media."
}
switch mediaType {
case .image:
return imageCluster.process(data: data)
case .video:
return videoCluster.process(data: data)
case .audio:
return audioCluster.process(data: data)
case .unknown:
return "Unsupported media type."
}
}
private func loadMedia(filePath: String, type: MediaType) -> Data? {
switch type {
case .image: return imageCluster.load(filePath: filePath)
case .video: return videoCluster.load(filePath: filePath)
case .audio: return audioCluster.load(filePath: filePath)
case .unknown: return nil
}
}
}
// Example Usage
let mediaManager = MediaManager()
print(mediaManager.processMedia(filePath: "video.mp4"))
print(mediaManager.processMedia(filePath: "image.jpg"))
print(mediaManager.processMedia(filePath: "audio.mp3"))
print(mediaManager.processMedia(filePath: "document.pdf"))