Scala ConcurrentLinkedQueue类代码示例

//设置package包名称以及导入依赖的类
package httpmock

import java.util.concurrent.ConcurrentLinkedQueue
import play.api.mvc._

final case class AccessLogQueue(queue: ConcurrentLinkedQueue[AccessLog] = new ConcurrentLinkedQueue[AccessLog]()) {
  def add(request: RequestHeader): Unit = queue.add(AccessLog(request))
  def add(request: RequestHeader, body: Option[ArrayByte]): Unit = queue.add(AccessLog(request, body))
  def shift(): Option[AccessLog] = Option(queue.poll())

  def filter(p: AccessLog => Boolean): Seq[AccessLog] = {
    val array = scala.collection.mutable.ArrayBuffer[AccessLog]()
    val it = queue.iterator()
    while (it.hasNext) {
      val log = it.next()
      if (p(log))
        array += log
    }
    array.toSeq
  }
} 

//设置package包名称以及导入依赖的类
package com.catinthedark.shapeshift.network

import java.util.concurrent.ConcurrentLinkedQueue

import com.badlogic.gdx.math.Vector2
import com.catinthedark.lib.Pipe
import com.catinthedark.lib.network.messages.Message

case class MoveMessage(x: Float, y: Float, angle: Float, idle: Boolean) extends Message
case class JumpMessage(x: Float, y: Float, angle: Float, scale: Float) extends Message
case class ShootMessage(x: Float, y: Float, shotObject: String) extends Message


trait NetworkControl extends Runnable {
  var isConnected: Option[Unit] = None
  var isMain: Boolean = false

  val onMovePipe = new Pipe[(Vector2, Float, Boolean)]()
  val onShootPipe = new Pipe[(Vector2, String)]()
  val onJumpPipe = new Pipe[(Vector2, Float, Float)]()
  val onEnemyDisconnected = new Pipe[Unit]()

  def move(pos: Vector2, angle: Float, idle: Boolean): Unit = {
    processOut(new MoveMessage(x=pos.x, y=pos.y, angle = angle, idle = idle))
  }

  def shoot(shotFrom: Vector2, objName: String): Unit = {
    processOut(new ShootMessage(x = shotFrom.x, y = shotFrom.y, shotObject = objName))
  }

  def jump(pos: Vector2, angle: Float, scale: Float): Unit = {
    processOut(new JumpMessage(x = pos.x, y = pos.y, angle = angle, scale = scale))
  }

  def processIn() = {
    while(!bufferIn.isEmpty)
      bufferIn.poll()()
  }
  
  def processOut(message: Any)
  
  def dispose(): Unit = {
    isConnected = None
  }

  protected val bufferIn = new ConcurrentLinkedQueue[() => Unit]()
  
  protected def onMove(msg: (Vector2, Float, Boolean)) = bufferIn.add(() => onMovePipe(msg))
  protected def onShoot(objName: String, shotFrom: Vector2) = bufferIn.add(() => onShootPipe(shotFrom, objName))
  protected def onJump(msg: (Vector2, Float, Float)) = bufferIn.add(() => onJumpPipe(msg))
  protected def onGameStarted(msg: (String, String)) = println(s"Received GameStart package $msg")
} 

//设置package包名称以及导入依赖的类
package com.twitter.finagle.util

import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.atomic.AtomicInteger
import java.util.logging.{Logger, Level}

trait Chan[-T] {
  def !(elem: T)
  def close()
}


trait Proc[-T] extends Chan[T] {
  private[this] val q = new ConcurrentLinkedQueue[T]
  private[this] val nq = new AtomicInteger(0)
  @volatile private[this] var closed = false

  def close() { closed = true }

  def !(elem: T) {
    q.offer(elem)
    if (nq.getAndIncrement() == 0)
      do {
        val elem = q.poll()
        // Swallow exceptions as these would cause
        // unbounded queue growth.
        if (!closed) {
          try receiver(elem) catch {
             case exc: Throwable =>
               Logger.getLogger("").log(Level.WARNING, "Exception thrown in proc", exc)
           }
        }
      } while (nq.decrementAndGet() > 0)
  }

  def receive: T => Unit
  private[this] val receiver = receive
}

object Proc {
  def apply[T](iteratee: T => Unit): Proc[T] = new Proc[T] {
    def receive = iteratee
  }

  val nil: Proc[Any] = new Proc[Any] { def receive = Function.const(()) }
} 

//设置package包名称以及导入依赖的类
package bbc.newsletter

import java.io._
import java.util.concurrent.ConcurrentLinkedQueue
import scala.collection.JavaConversions._
import scala.concurrent.duration._
import io.gatling.core.Predef._
import io.gatling.http.Predef._
import io.gatling.http.cookie._

class Step1PrepareSignedUsers extends Simulation {

  val httpProtocol = http
    .baseURL("https://ssl.stage.bbc.co.uk")
    .acceptCharsetHeader("ISO-8859-1,utf-8;q=0.7,*;q=0.7")
    .acceptHeader("text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")
    .acceptLanguageHeader("fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4")
    .acceptEncodingHeader("gzip, deflate, sdch")
    .userAgentHeader("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36")

  val cookieJars = new ConcurrentLinkedQueue[CookieJar]

  import java.util.concurrent.atomic._
  val value = new AtomicInteger(1)

  val prepareSignedUsers = scenario("prepareSignedUsers")
    
    .exec(http("landingPage").get("/newsletters/thenolanshow"))
    
    .exec(http("signIn").get("/id/signin?ptrt=https%3A%2F%2Fssl.stage.bbc.co.uk%2Fnewsletters%2Fthenolanshow"))
    
    .exec(http("signInPost").post("/id/signin?ptrt=https%3A%2F%2Fssl.stage.bbc.co.uk%2Fnewsletters%2Fthenolanshow")
      .formParam("unique", session => s"[email protected]${value.getAndIncrement}.com")
      .formParam("password", "loadtest")
      .formParam("rememberme", "1")
      .formParam("bbcid_submit_button", "Sign in")
        .check(substring("Please confirm your age")))
    // drop non persistent cookies
    .exec(flushSessionCookies)

    // save the cookieJar in the global queue
    .exec { session =>
      CookieHandling.cookieJar(session).foreach(cookieJars.add)
      session
    }

  setUp(prepareSignedUsers.inject(
    rampUsersPerSec(10) to(20) during(5 minutes),
    constantUsersPerSec(20) during(5 minutes)
  ).protocols(httpProtocol))

  after {
    CookieJarHelper.dumpCookieJarFeeder(cookieJars)
  }
} 

//设置package包名称以及导入依赖的类
package com.hellosoda.rmq.impl
import com.rabbitmq.client._
import java.util.concurrent.ConcurrentLinkedQueue
import scala.concurrent.Promise

private[rmq] class ConfirmListenerAdapter (
  val confirms : ConcurrentLinkedQueue[PublisherConfirm])
    extends ConfirmListener {

  private def completeWith (
    deliveryTag : Long,
    multiple    : Boolean)(
    action      : (Promise[Unit]) => Unit
  ) : Unit =
    if (!multiple) {
      val iter = confirms.iterator()
      while (iter.hasNext) {
        val pc = iter.next()
        if (pc.seqNo == deliveryTag) {
          confirms.remove(pc)
          action(pc.promise)
          return
        }
      }
    } else {
      val iter = confirms.iterator()
      while (iter.hasNext) {
        val pc = iter.next()

        if (pc.seqNo > deliveryTag)
          return

        confirms.remove(pc)
        action(pc.promise)
      }
    }

  override def handleAck (
    deliveryTag : Long,
    multiple    : Boolean
  ) : Unit =
    completeWith(deliveryTag, multiple)(_.success(()))

  override def handleNack (
    deliveryTag : Long,
    multiple    : Boolean
  ) : Unit =
    completeWith(deliveryTag, multiple)(_.failure(
      new java.io.IOException("NACK")))

} 

//设置package包名称以及导入依赖的类
package com.hellosoda.rmq.impl
import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.atomic.AtomicInteger
import scala.concurrent.{
  ExecutionContext,
  Future,
  Promise }

private[rmq] class AsyncMutex {
  private val queue = new ConcurrentLinkedQueue[Runnable]()
  private val queueSize = new AtomicInteger(0)

  def acquire [T] (f : => T)(implicit ec : ExecutionContext) : Future[T] = {
    val promise = Promise[T]()

    queue.add(new Runnable {
      def run () : Unit =
        Future(f).onComplete { any =>
          promise.complete(any)
          queue.poll()
          if (queueSize.decrementAndGet() > 0)
            queue.peek().run()
        }
    })

    if (queueSize.getAndIncrement() == 0) {
      queue.peek().run()
    }

    promise.future
  }

} 

//设置package包名称以及导入依赖的类
package com.nossin.ndb.custommailbox
import java.util.concurrent.ConcurrentLinkedQueue

import akka.actor.ActorRef
import akka.dispatch.{Envelope, MessageQueue}



class CustomMessageQueue extends MessageQueue {
  private final val queue = new
      ConcurrentLinkedQueue[Envelope]()
  // these should be implemented; queue used as example
  def enqueue(receiver: ActorRef, handle: Envelope): Unit =
  {

    if(handle.sender.path.name == "MyActor") {
      println("in enqueue, actor identified ")
      handle.sender !  "Hey dude, How are you?, I Know your name,processing your request"
        queue.offer(handle)
    }
    else {
      println("in enqueue, unknown actor")
      handle.sender ! "I don't talk to strangers, Ibcan't process your request"
    }
  }

  def dequeue(): Envelope = queue.poll
  def numberOfMessages: Int = queue.size
  def hasMessages: Boolean = !queue.isEmpty
  def cleanUp(owner: ActorRef, deadLetters: MessageQueue) {
    while (hasMessages) {
        deadLetters.enqueue(owner, dequeue())
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.twitter.finagle.util

import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.atomic.AtomicInteger
import java.util.logging.{Logger, Level}

trait Chan[-T] {
  def !(elem: T)
  def close()
}


trait Proc[-T] extends Chan[T] {
  private[this] val q = new ConcurrentLinkedQueue[T]
  private[this] val nq = new AtomicInteger(0)
  @volatile private[this] var closed = false

  def close() { closed = true }

  def !(elem: T) {
    q.offer(elem)
    if (nq.getAndIncrement() == 0)
      do {
        val elem = q.poll()
        // Swallow exceptions as these would cause
        // unbounded queue growth.
        if (!closed) {
          try receiver(elem) catch {
             case exc =>
               Logger.getLogger("").log(Level.WARNING, "Exception thrown in proc", exc)
           }
        }
      } while (nq.decrementAndGet() > 0)
  }

  def receive: T => Unit
  private[this] val receiver = receive
}

object Proc {
  def apply[T](iteratee: T => Unit): Proc[T] = new Proc[T] {
    def receive = iteratee
  }

  val nil: Proc[Any] = new Proc[Any] { def receive = Function.const(()) }
} 

//设置package包名称以及导入依赖的类
package tests

import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.atomic.AtomicInteger

import org.scalatest.{FlatSpec, Matchers}

import scala.concurrent.ExecutionContext.Implicits.global
import scala.concurrent.duration._
import scala.concurrent.{Await, Future}

class ThrottleTest11 extends FlatSpec with Matchers {

  case class Request()
  object DesAPI {
    def process(a: Request): Future[String] = Future {

      Thread.sleep(500)
      println("Done")
      "Done"
    }
  }

  val numActives = new AtomicInteger(0)
  def queue = new ConcurrentLinkedQueue[Request]()

  def apply(req: Request): Future[String] = {

    if (numActives.get > 10) {
      //two many concurrent requests - refused
      println("429 Too many requests")
      Future.successful("429 Too many requests")
    } else {
      //good to process
      println(numActives.incrementAndGet())
      val futureString = DesAPI.process(req)
      futureString.onComplete {
        _ => println(numActives.decrementAndGet())
      }
      futureString

    }

  }

  "a" should "b" in {

    val futures: Seq[Future[String]] = for (t <- 1 to 100) yield {
      val eventualString: Future[String] = { Thread.sleep(50); apply(Request()) }
      eventualString
    }

    Await.result(Future.sequence(futures), 5000 millis)

//    Thread.sleep(5000)

  }

} 

//设置package包名称以及导入依赖的类
package com.twitter.concurrent

import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.atomic.AtomicInteger

import com.twitter.util.{Future, Promise, Try}


trait Serialized {
  protected case class Job[T](promise: Promise[T], doItToIt: () => T) {
    def apply() {
      promise.update { Try { doItToIt() } }
    }
  }

  private[this] val nwaiters = new AtomicInteger(0)
  protected val serializedQueue: java.util.Queue[Job[_]] = new ConcurrentLinkedQueue[Job[_]]

  protected def serialized[A](f: => A): Future[A] = {
    val result = new Promise[A]

    serializedQueue add { Job(result, () => f) }

    if (nwaiters.getAndIncrement() == 0) {
      do {
        Try { serializedQueue.remove()() }
      } while (nwaiters.decrementAndGet() > 0)
    }

    result
  }
} 

//设置package包名称以及导入依赖的类
package com.cj.messagestreaming

import java.util.concurrent.ConcurrentLinkedQueue

class IterableBlockingQueue[T]
  extends java.lang.Iterable[T] with Queue[T] {

  private val queue: java.util.Queue[T] = new ConcurrentLinkedQueue[T]

  private var isDone: Boolean = false

  def size: Int = queue.size

  def done(): Unit = {
    isDone = true
  }

  def add(o: T): Unit = {
    queue.add(o)
  }

  def iterator: java.util.Iterator[T] = new java.util.Iterator[T] {

    override def hasNext: Boolean = {
      try
        while (queue.isEmpty && !isDone) {
          Thread.sleep(300)
        }
      catch {
        case e: InterruptedException =>
      }
      !(queue.isEmpty && isDone)
    }

    override def next: T = {
      queue.remove
    }

    override def remove(): Unit = queue.remove
  }

} 

//设置package包名称以及导入依赖的类
package alexsmirnov.stream

import scala.collection.JavaConverters._
import org.scalatest.FlatSpec
import org.scalatest.concurrent.Eventually
import org.scalatest.prop.PropertyChecks
import org.reactivestreams._
import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.atomic.AtomicInteger

class ProcessorTest extends FlatSpec with Eventually with PropertyChecks {
  class SubscriberProbe[A] extends Subscriber[A] {
    private val _buffer = new ConcurrentLinkedQueue[A]()
    private val _completes = new AtomicInteger
    private val _errors = new ConcurrentLinkedQueue[Throwable]()
    var subscription: Subscription = null
    // implementation
    def onSubscribe(s: Subscription) {subscription = s}
    def onNext(a: A) = {_buffer.add(a)}
    def onComplete() { _completes.incrementAndGet() }
    def onError(e: Throwable) { _errors.add(e) }
    // control methods
    def received = _buffer.asScala
    def errors = _errors.asScala
    def cancel = subscription.cancel()
    def request(n: Long) = subscription.request(n)
    def completed = _completes.get
  }
  "FlatMap" should "request first event on request from subscriber" in {
    
  }
  it should "transform input to collections and send them to subscriber" in {
    
  }
  it should "pass cancel event back to producer and stop transmission" in {
    
  }
  it should "forget remaining events on cancel" in {
    
  }
  it should "start new stream after cancel on first request from subscriber" in {
    
  }
} 

//设置package包名称以及导入依赖的类
package pl.edu.agh.workflow_processes.synchronization

import java.util.concurrent.ConcurrentLinkedQueue

import pl.edu.agh.actions._
import pl.edu.agh.workflow_processes.Pattern


class Sync[T, R](var _name: String,
                 var _numOfIns: Int,
                 var _numOfOuts: Int,
                 var _ins: Seq[String],
                 var _outs: Seq[String],
                 var _action: IMultipleAction[T, R]) extends Pattern[T, R] {

  def this() {
    this("", 0, 0, Seq.empty[String], Seq.empty[String], EmptyMultipleAction[T, R]())
  }

  //Ewentualnie mozna uzyc LinkedBlockingQueue
  lazy val syncPointsQueues = {
    var res = Seq.empty[ConcurrentLinkedQueue[T]]
    var insCount: Int = 0
    if (_numOfIns > 0) {
      insCount = _numOfIns
    } else if (_ins.nonEmpty) {
      insCount = _ins.size
    }
    for (i <- 0 until insCount) {
      res :+= new ConcurrentLinkedQueue[T]()
    }
    res
  }

  override lazy val actor = SyncActor(_name, _numOfOuts, _ins, _outs, _action, syncPointsQueues)
}

object Sync {
  def apply[T, R](name: String, numOfIns: Int, numOfOuts: Int, action: (Ins[T], Outs) => Unit) = new Sync[T, R](name, numOfIns, numOfOuts, Seq.empty, Seq.empty, ActionConverter[T, R](action))
  def apply[T, R](name: String, numOfIns: Int, outs: Seq[String], action: (Ins[T], Outs) => Unit)(implicit d: DummyImplicit) = new Sync[T, R](name, numOfIns, 0, Seq.empty, outs, ActionConverter[T, R](action))
  def apply[T, R](name: String, ins: Seq[String], numOfOuts: Int, action: (Ins[T], Outs) => Unit) = new Sync[T, R](name, 0, numOfOuts, ins, Seq.empty, ActionConverter[T, R](action))
  def apply[T, R](name: String, ins: Seq[String], outs: Seq[String], action: (Ins[T], Outs) => Unit) = new Sync[T, R](name, 0, 0, ins, outs, ActionConverter[T, R](action))
  def apply[T, R](name: String, numOfIns: Int, numOfOuts: Int, action: Ins[T] => Outs => Unit) = new Sync[T, R](name, numOfIns, numOfOuts, Seq.empty, Seq.empty, ActionConverter[T, R](action))
  def apply[T, R](name: String, numOfIns: Int, outs: Seq[String], action: Ins[T] => Outs => Unit)(implicit d: DummyImplicit) = new Sync[T, R](name, numOfIns, 0, Seq.empty, outs, ActionConverter[T, R](action))
  def apply[T, R](name: String, ins: Seq[String], numOfOuts: Int, action: Ins[T] => Outs => Unit) = new Sync[T, R](name, 0, numOfOuts, ins, Seq.empty, ActionConverter[T, R](action))
  def apply[T, R](name: String, ins: Seq[String], outs: Seq[String], action: Ins[T] => Outs => Unit) = new Sync[T, R](name, 0, 0, ins, outs, ActionConverter[T, R](action))
  def apply[T, R] = new Sync[T, R]
} 

//设置package包名称以及导入依赖的类
package pl.edu.agh.workflow_processes.synchronization

import java.util.concurrent.ConcurrentLinkedQueue

import pl.edu.agh.workflow_processes.{PatternActor, PatternOuts}

import scala.util.control.Breaks._
import akka.actor.{ActorLogging, Props}
import pl.edu.agh.actions.{IMultipleAction, Ins, Outs}
import pl.edu.agh.messages._

class SyncActor[T, R](numOfOuts: Int, ins: Seq[String], outs: Seq[String], var multipleAction: IMultipleAction[T, R], syncPoints: Seq[ConcurrentLinkedQueue[T]]) extends PatternActor(numOfOuts, outs, multipleAction) with PatternOuts[R] with ActorLogging {
  def receive = {
    case SyncDataMessage(data: T, uId) =>
      syncPoints(uId).offer(data)
      self ! GetResult

    case GetResult =>

      var canExecuteAction = true

      breakable {
        for (q <- syncPoints) {
          val el = q.peek()
          if (el == null) {
            canExecuteAction = false
            break
          }
        }
      }

      if (canExecuteAction) {
        var sync = Map.empty[String, T]
        if (ins.nonEmpty) {
          for (i <- 0 until syncPoints.size) {
            sync = sync + (ins(i) -> syncPoints(i).poll())
          }
        } else {
          for (i <- 0 until syncPoints.size) {
            sync = sync + (("in" + i) -> syncPoints(i).poll())
          }
        }
        multipleAction.execute(Ins(sync))(Outs(_outs))
      }
    case ChangeAction(act: IMultipleAction[T, R]) =>
      multipleAction = act
    
    case Get =>
      sender ! this
  }

}

object SyncActor {
  import pl.edu.agh.utils.ActorUtils.system

  def apply[T, R](name: String, numOfOuts: Int, ins: Seq[String], outs: Seq[String], action: IMultipleAction[T, R], syncPoints: Seq[ConcurrentLinkedQueue[T]]) = system.actorOf(SyncActor.props(numOfOuts, ins, outs, action, syncPoints), name)
  def props[T, R](numOfOuts: Int, ins: Seq[String], outs: Seq[String], action: IMultipleAction[T, R], syncPoints: Seq[ConcurrentLinkedQueue[T]]) = Props(classOf[SyncActor[T, R]], numOfOuts, ins, outs, action, syncPoints)
} 

//设置package包名称以及导入依赖的类
package pl.edu.agh.workflow_processes.discriminator

import java.util.concurrent.ConcurrentLinkedQueue

import akka.actor.{ActorLogging, Props}
import pl.edu.agh.actions.{IMultipleAction, Ins, Outs}
import pl.edu.agh.messages._
import pl.edu.agh.workflow_processes.{PatternActor, PatternOuts}

class DiscActor[T, R](numOfOuts: Int, ins: Seq[String], n: Int, outs: Seq[String], var multipleAction: IMultipleAction[T, R], syncPoints: Seq[ConcurrentLinkedQueue[T]]) extends PatternActor(numOfOuts, outs, multipleAction) with PatternOuts[R] with ActorLogging {

  var synchronizedInputs = Set.empty[Int]

  def receive = {
    case SyncDataMessage(data: T, uId) =>
      syncPoints(uId).offer(data)
      self ! GetResult

    case GetResult =>

      for (i <- 0 until syncPoints.size) {
        val el = syncPoints(i).peek()
        if (el != null && synchronizedInputs.size < n) {
          synchronizedInputs += i
        }
      }

      if (synchronizedInputs.size == n) {
        var sync = Map.empty[String, T]
        if (ins.nonEmpty) {
          for (i <- synchronizedInputs) {
            sync = sync + (ins(i) -> syncPoints(i).poll())
          }
        } else {
          for (i <- synchronizedInputs) {
            sync = sync + (("in" + i) -> syncPoints(i).poll())
          }
        }
        synchronizedInputs = Set.empty[Int]
        multipleAction.execute(Ins(sync))(Outs(_outs))
      }
    case ChangeAction(act: IMultipleAction[T, R]) =>
      multipleAction = act
    
    case Get =>
      sender ! this
  }

}

object DiscActor {

  import pl.edu.agh.utils.ActorUtils.system

  def apply[T, R](name: String, numOfOuts: Int, ins: Seq[String], n: Int, outs: Seq[String], action: IMultipleAction[T, R], syncPoints: Seq[ConcurrentLinkedQueue[T]]) = system.actorOf(DiscActor.props(numOfOuts, ins, n, outs, action, syncPoints), name)

  def props[T, R](numOfOuts: Int, ins: Seq[String], n: Int, outs: Seq[String], action: IMultipleAction[T, R], syncPoints: Seq[ConcurrentLinkedQueue[T]]) = Props(classOf[DiscActor[T, R]], numOfOuts, ins, n, outs, action, syncPoints)
}