kafka.utils.DelayedItem.scala Maven / Gradle / Ivy
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/**
* 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 kafka.utils
import java.util.concurrent._
import scala.math._
class DelayedItem[T](val item: T, delay: Long, unit: TimeUnit) extends Delayed with Logging {
val createdMs = SystemTime.milliseconds
val delayMs = {
val given = unit.toMillis(delay)
if (given < 0 || (createdMs + given) < 0) (Long.MaxValue - createdMs)
else given
}
def this(item: T, delayMs: Long) =
this(item, delayMs, TimeUnit.MILLISECONDS)
/**
* The remaining delay time
*/
def getDelay(unit: TimeUnit): Long = {
val elapsedMs = (SystemTime.milliseconds - createdMs)
unit.convert(max(delayMs - elapsedMs, 0), TimeUnit.MILLISECONDS)
}
def compareTo(d: Delayed): Int = {
val delayed = d.asInstanceOf[DelayedItem[T]]
val myEnd = createdMs + delayMs
val yourEnd = delayed.createdMs + delayed.delayMs
if(myEnd < yourEnd) -1
else if(myEnd > yourEnd) 1
else 0
}
}