LAPP_SJA_ME_WEB/engine/fetcher.go

package Engine

import (
	"LAPP_SJA_ME/conf"
	"LAPP_SJA_ME/web/middleware/glog"
	"LAPP_SJA_ME/web/models"
	"time"
)

// 启动打印任务提取服务
// conf Config.EnvConfig 配置文件
// c chan Model.PrintTask 任务通道->Scheduler
func StartFetcher(conf *conf.EnvConfig, c chan models.PrintTask) {
	var (
		prnlist []string
		err error
	)
	printers := models.Printertab{}
	prnlist, err = printers.GetPrinterIdList(conf)
	if err != nil {
		glog.InfoExtln("Fetcher","Fetcher: failed to get printer id list due to ", err)
		return
	}

	// 启动Goroutine不间断读取打印任务
	go func(){
		var(
			taskList []models.PrintTask
			stalist []string
			err error
		)
		// 首先加载pending 未打印的任务
		stalist =[]string{"P"}
		task := new(models.PrintTask)
		taskList, err = task.GetPrintTaskList(stalist, prnlist,conf)
		if err != nil {
			glog.InfoExtln("Fetcher","Failed to read the task due to : ", err)
		}
		for _, t := range taskList {
			c <- t
		}

		// 循环加载新建的打印任务
		stalist =[]string{"N", "R"}
		for {
			taskList, err := task.GetPrintTaskList(stalist, prnlist,conf)
			if err != nil {
				glog.InfoExtln("Fetcher","Failed to read the task due to : ", err)
			}
			for _, t := range taskList {
				c <- t
				task.ChangePrintTaskStatus(t, "P") // 将任务状态置为处理中
			}
			time.Sleep(time.Duration(conf.ReadTaskInterval) * time.Second)
		}
	}()
}