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package cn.flightfeather.supervision.datafetch
 
import org.springframework.stereotype.Component
import java.util.*
import java.util.concurrent.*
 
/**
 * 数据获取控制器
 */
@Component
class FetchController(
        fetchNightConstruction: FetchNightConstruction
) {
 
    companion object {
        private const val FETCH_PERIOD_MIN = 30L
        private const val MAINTAIN_PERIOD_MIN = 15L
    }
 
    private val fetchData = mutableListOf<FetchData>()
    private var schedule = Executors.newScheduledThreadPool(1)
    private var maintainSchedule = Executors.newScheduledThreadPool(1)
    private var fetchTime: Date = Date()
    private var maintainTime: Date = Date()
 
    init {
        fetchData.add(fetchNightConstruction)
    }
 
    fun run() {
        println("【飞羽监管】数据获取任务启动")
        fetchTask()
        maintainTask()
    }
 
    private fun fetchTask(isFirst: Boolean = false) {
        if (!isFirst) {
            schedule = closeThread(schedule)
        }
        schedule.scheduleAtFixedRate({
            fetchTime = Date()
            if (Date().time - maintainTime.time > (MAINTAIN_PERIOD_MIN * 2) * 60 * 1000) {
                maintainTask()
            }
            fetchData.forEach {
                it.fetch()
            }
        }, 0, FETCH_PERIOD_MIN, TimeUnit.MINUTES)
    }
 
    private fun maintainTask(isFirst: Boolean = false) {
        if (!isFirst) {
            maintainSchedule = closeThread(maintainSchedule)
        }
        maintainSchedule.scheduleAtFixedRate({
            maintainTime = Date()
            if (Date().time - fetchTime.time > (FETCH_PERIOD_MIN * 2) * 60 * 1000) {
                fetchTask()
            }
        }, 0, MAINTAIN_PERIOD_MIN, TimeUnit.MINUTES)
    }
 
    private fun closeThread(s: ScheduledExecutorService): ScheduledExecutorService {
        try {
            s.shutdown()
            if (s.awaitTermination(10, TimeUnit.SECONDS)) {
                s.shutdownNow()
            }
        } catch (e: InterruptedException) {
            e.printStackTrace()
            s.shutdownNow()
        }
        return Executors.newScheduledThreadPool(1)
    }
}