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LogQueue.js
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LogQueue.js
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const DEFAULT_QUEUE_LENGTH_THRESHOLD = __DEV__ ? 10 : 1024
const createLogQueue = ({
outputStream,
queueLengthThreshold = DEFAULT_QUEUE_LENGTH_THRESHOLD
}) => {
const logQueue = [] // buffered log
const pullLog = () => {
logQueue.push('') // for an extra '\n'
const string = logQueue.join('\n')
logQueue.length = 0
return string
}
const add = (logString) => { // will trigger save on threshold
__DEV__ && console.log('[LogQueue] log', logString)
logQueue.push(logString)
logQueue.length > queueLengthThreshold && save()
}
const save = () => {
if (logQueue.length === 0) return
__DEV__ && console.log('[LogQueue] save')
outputStream.write(pullLog())
}
const end = () => {
__DEV__ && console.log('[LogQueue] end')
logQueue.length !== 0 && outputStream.write(pullLog())
outputStream.end()
}
return { add, save, end }
}
export { createLogQueue }