Effect CommunityEC
Effect Community•13mo ago
Wendaolee

Passing Custom Loggers to Different Layers in Effect Typescript

If the Logger can passed into the deeper layer dependency?I want to make the Effect.log's output into different log file at different layers with my custom layer like this:
const stashedLogger = (filePath: string = './logs/default.log') => Logger.make(
    ({ logLevel, message, date }) => {
        if (logLevel === LogLevel.Info) {
            globalThis.console.log(`[${date.toLocaleString('zh-CN', { timeZone: 'Asia/Shanghai', fractionalSecondDigits: 3, year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit' })}] INFO |  ${message}`)
            fs.appendFileSync(filePath, `[${date.toLocaleString('zh-CN', { timeZone: 'Asia/Shanghai', fractionalSecondDigits: 3, year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit' })}] INFO |  ${message}\n`, { encoding: 'utf-8' })
            return
        }
}
)


And use it with a util function:
export const getLoggerLayer = (path: LoggerPath | string) => Logger.replace(Logger.defaultLogger, stashedLogger(path))

But when I tried to inject into layer's implementation in this way:
export const crawlerListServiceWithCustomLoggerLive = Layer.provide(
    crawlerListServiceLive,
    getLoggerLayer('./logs/crawler-list.log')
)

export const WechatCrawlerServiceRunnable = Effect.provide(
    Effect.gen(function*(){
        const crawlerService = yield* WechatCrawlerService
        yield* crawlerService.startCrawler
    }),
    WechatCrawlerServiceLive.pipe(
        Layer.provide(crawlerListServiceWithCustomLoggerLive),
        //...other layers's implementation
        Layer.provide(getLoggerLayer('./logs/wechat-crawler.log'))
    )
)
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