cc.otavia.core.stack.AbstractPromise.scala Maven / Gradle / Ivy
/*
* Copyright 2022 Yan Kun
*
* 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 cc.otavia.core.stack
import cc.otavia.core.cache.Poolable
import cc.otavia.core.timer.Timer
import scala.annotation.tailrec
import scala.language.unsafeNulls
/** An abstract class for [[Promise]] */
abstract class AbstractPromise[V] extends Promise[V] with Future[V] with Poolable {
protected var stack: Stack = _
protected var aid: Long = -1
private var tid: Long = Timer.INVALID_TIMEOUT_REGISTER_ID
protected var result: AnyRef = _
protected var error: Throwable = _
private var p: AbstractPromise[?] = _
def setTimeoutId(id: Long): Unit = tid = id
def timeoutId: Long = tid
final override def canTimeout: Boolean = tid != Timer.INVALID_TIMEOUT_REGISTER_ID
final override def actorStack: Stack = stack
final override def setStack(s: Stack): Unit = stack = s
final def id: Long = aid
final def setId(id: Long): Unit = aid = id
override def isSuccess: Boolean = result ne null
override def isFailed: Boolean = error ne null
override def getNow: V = if (result == null && error == null) throw new IllegalStateException("not completed yet")
else if (error != null) throw error
else result.asInstanceOf[V]
override def cause: Option[Throwable] = if (result == null && error == null)
throw new IllegalStateException("not completed yet")
else Option(error)
override def causeUnsafe: Throwable = if (result == null && error == null)
throw new IllegalStateException("not completed yet")
else if (result != null) throw new IllegalStateException("the future is success")
else error
override protected def cleanInstance(): Unit = {
stack = null
aid = -1
tid = Timer.INVALID_TIMEOUT_REGISTER_ID
result = null
error = null
p = null
}
/** Set the pre object of this object. */
final private[core] def pre_=(promise: AbstractPromise[?]): Unit = p = promise
final private[core] def cleanPre(): Unit = p = null
/** Get the pre object of this object. */
final private[core] def pre: AbstractPromise[?] = p
}