org.openurp.ws.services.teach.attendance.web.app.SyncServlet.scala Maven / Gradle / Ivy

/*
 * OpenURP, Open University Resouce Planning
 *
 * Copyright (c) 2013-2014, OpenURP Software.
 *
 * OpenURP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * OpenURP is distributed in the hope that it will be useful.
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Beangle.  If not, see .
 */
package org.openurp.ws.services.teach.attendance.web.app

import org.beangle.commons.lang.Dates
import org.beangle.commons.lang.time.Stopwatch
import org.beangle.commons.lang.Strings._
import org.beangle.commons.logging.Logging
import org.beangle.data.jdbc.query.JdbcExecutor
import org.openurp.ws.services.teach.attendance.impl.DeviceRegistry
import org.openurp.ws.services.teach.attendance.web.util.{ JsonBuilder, Params, Render }
import org.openurp.ws.services.teach.attendance.web.util.Consts.{ DeviceId, Rule }
import org.openurp.ws.services.teach.attendance.domain.DateFormats.{ toDateStr, toTimeStr }
import javax.servlet.{ ServletRequest, ServletResponse }
import javax.servlet.http.HttpServlet

/**
 * 同步服务器心跳
 *
 * @author chaostone
 * @version 1.0, 2014/03/22
 * @since 0.0.1
 */
class SyncServlet extends HttpServlet with Logging {

  var executor: JdbcExecutor = _

  var deviceRegistry: DeviceRegistry = _

  override def service(req: ServletRequest, res: ServletResponse) {
    val watch = new Stopwatch(true)
    var retcode: Int = -1
    var devid = 0
    var retmsg, room = ""
    val params = Params.require(DeviceId).get(req, Rule)
    if (!params.ok) {
      retmsg = params.msg.values.mkString(";")
    } else {
      devid = params(DeviceId)
      deviceRegistry.get(devid) match {
        case Some(d) => {
          val now = Dates.now
          //距离上次更新的间隔(s),20秒以内不更新数据库
          val updateInterval = if (null == d.syncAt) 20 else (now.getTime() - d.syncAt.getTime()) / 1000
          if (updateInterval >= 20) {
            d.syncAt = now
            if (executor.update("update DEVICE_JS set qdsj=? where devid=?", Dates.now, devid) < 1) {
              deviceRegistry.unregister(devid)
              retmsg = "无法连接，没有对应的教室信息"
            }
          }
          if (isEmpty(retmsg)) {
            room = d.room.name
            retcode = 0
          }
        }
        case None =>
          retmsg = "无法连接，没有对应的教室信息"
      }
    }
    //FIXME rename classname to roomname
    val rs = new JsonBuilder
    rs.add("retcode", retcode).add("retmsg", retmsg);
    rs.add("classname", room).add("devid", devid).add("serverdate", toDateStr()).add("servertime", toTimeStr())
    Render.render(res, rs)
    if (watch.elapsedMillis > 20) logger.warn("sync using {}", watch)
  }
}