trunk/server/src/main/scala/org/apache/esme/comet/ConversationTimeline.scala

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.esme.comet   

import net.liftweb.common._    
import net.liftweb.mapper._
import net.liftweb.http._ 
import net.liftweb.util.Helpers.TimeSpan

import org.apache.esme._
import actor.{Distributor,UserActor,ConvDistributor}
import model._        

class ConversationTimeline extends Timeline {  
  
  val jsId = "conversation_timeline_messages"
  var convId:Long = S.param("cid").map(_.toLong).openOr(-1L)  
  var convMess:Message = Message.findMessages(List(convId)).values.toList.head
                                  
  override def localSetup() {
    super.localSetup()       
    
    Distributor ! Distributor.ListenObject(convMess, this)
    messages = Message.findAndPrime(By(Message.conversation, convId),
                                    OrderBy(Message.id, Descending)).map( m => 
                                    (m.id.is, NoReason, true)).take(40)
  }  
  
  override def localShutdown() {
    super.localShutdown()                          
    Distributor ! Distributor.UnlistenObject(convMess, this)
  } 
  
  override def lifespan = Full(TimeSpan(300000))
  
  override def lowPriority = {
    case ConvDistributor.MessageReceived(msg, r) =>
      messages = ((msg.id.is,r,true) :: messages).take(40)
      reRender(false)
  }   

}