A minimal generic logger class in Swift.

Logger.swift

import Foundation


struct LoggerMessage<T> {
    let date: NSDate
    let value: T
}


class Logger<T> {
    typealias LoggerMessageType = LoggerMessage<T>

    private var mutableBuffer = Array<LoggerMessageType>()
    private let bufferQueue = dispatch_queue_create("com.asmallteapot.Logger", DISPATCH_QUEUE_CONCURRENT)


    func push(msg: T) {
        dispatch_barrier_async(self.bufferQueue) {
            self.mutableBuffer.append(LoggerMessageType(date: NSDate(), value: msg))
        }
    }


    func removeAll() {
        dispatch_barrier_sync(self.bufferQueue) {
            self.mutableBuffer.removeAll()
        }
    }


    func getAll() -> [T]? {
        var allItems: [T]?
        dispatch_barrier_sync(self.bufferQueue) {
            allItems = self.mutableBuffer.map { $0.value }
        }
        return allItems
    }
}