net.liftweb.actor.LAFuture.scala Maven / Gradle / Ivy
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/*
* Copyright 2009-2010 WorldWide Conferencing, LLC
*
* Licensed 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 net.liftweb {
package actor {
import common._
class LAFuture[T] /*extends Future[T]*/ {
@volatile private[this] var item: T = _
@volatile private[this] var satisfied = false
def satisfy(value: T): Unit = synchronized {
if (!satisfied) {
item = value
satisfied = true
}
notifyAll()
}
def get: T = synchronized {
if (satisfied) item
else {
this.wait()
if (satisfied) item
else get
}
}
def get(timeout: Long): Box[T] = synchronized {
if (satisfied) Full(item)
else {
try {
wait(timeout)
if (satisfied) Full(item)
else Empty
} catch {
case _: InterruptedException => Empty
}
}
}
}
}
}