问候
我正在使用scala版本2.8.0和2.1版本的电梯用maven编译我的项目我标记了以下错误:
error: type mismatch; [INFO] required: **scala.actors.Actor** [INFO] Auctioneer !? AddListener(**this**, this.itemId) match { [INFO] ^ error: type mismatch; [INFO] required: **scala.actors.Actor** [INFO] Auctioneer ! RemoveListener(**this**, this.itemId) [INFO] ^
文件是:
package org.developerworks.comet
import net.liftweb.http._
import net.liftweb.common.Full
import net.liftweb.http.S._
import net.liftweb.http.SHtml._
import net.liftweb.http.js.JsCmd
import net.liftweb.http.js.JsCmds._
import net.liftweb.http.js.JE._
import net.liftweb.util.Helpers._
import net.liftweb.util._
import scala.xml.NodeSeq
import org.developerworks.model._
import org.developerworks.actor._
import java.lang.Long
class AuctionActor extends CometActor {
var highBid : TheCurrentHighBid = null
override def defaultPrefix = Full("auction")
val itemId = S.param("itemId").map(Long.parseLong(_)).openOr(0L)
def render = {
def itemView: NodeSeq = {
val item = if (itemId > 0)
ItemMetaData.findByKey(itemId).openOr(ItemMetaData.create)
else ItemMetaData.create
val currBid = item.highBid
val bidAmt = if (currBid.user.isEmpty) 0L else currBid.amount.is
highBid = TheCurrentHighBid(bidAmt, currBid.user.obj.openOr(User.currentUser.open_!))
val minNewBid = highBid.amount + 1L
val button = <button type="button">{S.?("Bid Now!")}</button> %
("onclick" -> ajaxCall(JsRaw("$('#newBid').attr('value')"), bid _))
(<div>
<strong>{item.name}</strong>
<br/>
<div>
Current Bid: ${highBid.amount} by {highBid.user.niceName}
</div>
<div>
New Bid (min: ${minNewBid}) :
<input type="text" id="newBid"/>
{button}
</div>
{item.description}<br/>
</div>)
}
bind("foo" -> <div>{itemView}</div>)
}
def bid(s:String): JsCmd = {
val user = User.currentUser.open_!
Auctioneer ! BidOnItem(itemId, Long.parseLong(s), user)
Noop
}
override def localSetup {
Auctioneer !? AddListener(this, this.itemId) match {
case Success(true) => println("Listener added")
case _ => println("Other ls")
}
}
override def localShutdown {
Auctioneer ! RemoveListener(this, this.itemId)
}
override def lowPriority : PartialFunction[Any, Unit] = {
case TheCurrentHighBid(a,u) => {
highBid = TheCurrentHighBid(a,u)
reRender(false)
}
case _ => println("Other lp")
}
}
任何人都可以告诉我我错过了或者我做错了
我在2.7.3版中编译了这个项目并且没有问题
请帮忙!!!答案 0 :(得分:3)
Lift的演员不再是Scala Actors。 可能是他们进行互操作的一种方式,但我建议首先尝试更改所有演员,以便他们成为举动演员。
答案 1 :(得分:1)
您可以在同一个项目中使用Scala Actors和Lift Actors,但不能将它们替换为彼此。他们使用完全不同的Actor系统实现,因此就我所知,他们不能互相发送消息。
在Lift项目中,我通常会将LiftActors用于我的单身,名为actor,它们将显式接收发送给它的消息。为了便于阅读,我将使用Scala actor来执行后台任务,例如记录写入数据库:
actor { mapper.save }