Scala Iterable类代码示例

//设置package包名称以及导入依赖的类
package org.argus.jawa.core.util

import hu.ssh.progressbar.ProgressBar

import scala.collection.immutable.Iterable


object ProgressBarUtil {
  def withProgressBar[T, R](msg: String, pb: ProgressBar)(tasks: Iterable[T], f: T => R): Iterable[R] = {
    println(msg + " Total: " + tasks.size)
    val progressBar = pb.withTotalSteps(tasks.size)
    progressBar.start()
    val result = tasks.map { task =>
      progressBar.tickOne()
      f(task)
    }
    progressBar.complete()
    result
  }
} 

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

import model.Device
import play.api.libs.json._
import play.api.mvc._
import services.DataSource

import scala.collection.immutable.Iterable
import scala.concurrent.ExecutionContext.Implicits.global

class DevicesController(cc: ControllerComponents, ds: DataSource) extends AbstractController(cc) {

  def getDevicesAsJson: Action[AnyContent] =
    result(devices => Ok(Json.toJson(devices)).as(JSON))

  def getDevicesAsHTML: Action[AnyContent] =
    result(devices => Ok(views.html.devices(devices.toSeq)))

  private[this] def result(mapping: Iterable[Device] => Result) = Action.async {
    ds.devices.map { devices =>
      mapping(devices)
    }
  }
} 

//设置package包名称以及导入依赖的类
package mocks

import model.{Device, Position, Sensor}
import services.DataSource

import scala.collection.immutable.Iterable
import scala.concurrent.{ExecutionContext, Future}


object DataSourceMock {

  val mockDevices = new DataSource {

    override val executionContext: ExecutionContext = scala.concurrent.ExecutionContext.global

    override def devices: Future[Iterable[Device]] = Future.successful(List(
      Device(
        1,
        "CaDani",
        Position(51.461999, 0.125753, 0),
        List(Sensor(1, "Luz"), Sensor(2, "Hum"))
      ),
      Device(
        2,
        "Adri house",
        Position(51.462485, 0.126115, 0),
        List(Sensor(1, "Luz"), Sensor(2, "Hum"))
      ),
      Device(
        3,
        "Angelote pelote",
        Position(40.733362, -3.946101, 0),
        List(Sensor(1, "Luz"), Sensor(2, "Hum"))
      )
    ))
  }

} 

//设置package包名称以及导入依赖的类
package com.github.jeroenr.tepkin.examples

import akka.stream.ActorMaterializer
import akka.stream.scaladsl.Source
import com.github.jeroenr.bson.{Bulk, BsonDocument, BsonDsl}
import BsonDsl._
import com.github.jeroenr.tepkin.MongoClient
import com.github.jeroenr.bson.Bulk

import scala.collection.immutable.Iterable

object SinkExample extends App {
  // Connect to Mongo client
  val client = MongoClient("mongodb://localhost")

  import client.context

  // Obtain reference to database "tepkin" using client
  val db = client("tepkin")

  // Obtain reference to the collection "collection1" using database
  val collection1 = db("collection1")

  // Obtain reference to the collection "collection2" using database
  val collection2 = db("collection2")

  implicit val mat = ActorMaterializer()

  // Batch document source
  def documents(n: Int): Source[List[BsonDocument], akka.NotUsed] = Source {
    Iterable.tabulate(n) { _ =>
      (1 to 1000).map(i => $document("name" := s"fehmi$i")).toList
    }
  }

  val ref1 = documents(1000).map(Bulk).runWith(collection1.sink())
  val ref2 = documents(2000).map(Bulk).runWith(collection2.sink())

  client.shutdown(ref1, ref2)
} 

//设置package包名称以及导入依赖的类
package io.livingston.ditto.thrift

import com.twitter.finagle.thrift.Protocols
import com.twitter.finagle.{ListeningServer, Service, Thrift}
import com.twitter.util.{Await, Future}
import com.typesafe.scalalogging.LazyLogging
import io.livingston.ditto.Responder
import org.apache.thrift.transport.TMemoryInputTransport

import scala.collection.immutable.Iterable
import scala.util.Try

class ThriftResponder extends Responder with LazyLogging {
  val protocol: String = "thrift"
  private var _serverConfigs = Seq.empty[ThriftServerConfig]
  private var _listeningServers = Iterable.empty[ListeningServer]

  def announce(): Unit = {
    _serverConfigs.foreach { server =>
      super.announce(server.port, server.endpoints.map(_.msg))
    }
  }

  def apply(yaml: String): Unit = {
    import ThriftResponsesProtocol._
    super.parse[ThriftResponses](yaml, _.convertTo[ThriftResponses]) { responses =>
      _serverConfigs = responses.thrift

      val thriftServers = responses.thrift.foldLeft(Map.empty[Int, Map[String, ThriftEndpoint]]) { (serverMap, server) =>
        serverMap + (server.port -> server.endpoints.foldLeft(Map.empty[String, ThriftEndpoint]) { (endpointMap, endpoint) =>
          endpointMap + (endpoint.msg -> endpoint)
        })
      }

      _listeningServers = thriftServers.map { case (port, endpoints) =>
        val service = new Service[Array[Byte], Array[Byte]] {
          def apply(request: Array[Byte]): Future[Array[Byte]] = {
            val inputTransport = new TMemoryInputTransport(request)
            val thriftRequest = Protocols.binaryFactory().getProtocol(inputTransport)
            Try {
              val msg = thriftRequest.readMessageBegin()
              endpoints.get(msg.name).map { e =>
                val response = e.body.toArray
                Thread.sleep(e.latency.sleepTime)
                Future.value(response)
              }.getOrElse {
                Future.exception(new Exception("Invalid Request"))
              }
            }.getOrElse(Future.exception(new Exception("")))
          }
        }
        Thrift.server.serve(s":$port", service)
      }
    }
  }

  def close(): Unit = {
    import com.twitter.conversions.time._
    Await.all( _listeningServers.map(_.close()).toSeq, 5.seconds )
  }
} 

//设置package包名称以及导入依赖的类
package io.livingston.ditto.http

import com.twitter.finagle.http.{Request, Response, Status}
import com.twitter.finagle.{Http, ListeningServer, Service}
import com.twitter.util.{Await, Future}
import com.typesafe.scalalogging.LazyLogging
import io.livingston.ditto.Responder

import scala.collection.immutable.Iterable

class HttpResponder extends Responder with LazyLogging {
  val protocol: String = "http"
  private var _serverConfigs = Seq.empty[HttpServerConfig]
  private var _listeningServers = Iterable.empty[ListeningServer]


  def announce(): Unit = {
    _serverConfigs.foreach { server =>
      super.announce(server.port, server.endpoints.map(e => s"${e.method} => ${e.uri}"))
    }
  }

  def apply(yaml: String): Unit = {
    type MethodAndUri = (String, String)
    import HttpResponsesProtocol._
    super.parse[HttpResponses](yaml, _.convertTo[HttpResponses]) { responses =>
      _serverConfigs = responses.http

      val httpServers = responses.http.foldLeft(Map.empty[Int, Map[MethodAndUri, HttpEndpoint]]) { (serverMap, server) =>
        serverMap + (server.port -> server.endpoints.foldLeft(Map.empty[MethodAndUri, HttpEndpoint]) { (endpointMap, endpoint) =>
          endpointMap + ((endpoint.method -> endpoint.uri) -> endpoint)
        })
      }

      _listeningServers = httpServers.map { case (port, endpoints) =>
        val service = new Service[Request, Response] {
          def apply(request: Request): Future[Response] = {
            endpoints.get(request.method.toString -> request.uri).map { e =>
              val response = Response(request.version, Status(e.status))
              response.contentString = e.body
              Thread.sleep(e.latency.sleepTime)
              Future.value(response)
            }.getOrElse {
              Future.value(Response(request.version, Status.BadRequest))
            }
          }
        }
        Http.serve(s":$port", service)
      }
    }
  }

  def close(): Unit = {
    import com.twitter.conversions.time._
    Await.all( _listeningServers.map(_.close()).toSeq, 5.seconds )
  }
} 

//设置package包名称以及导入依赖的类
package aima.core.search

import scala.collection.immutable.Iterable

trait Frontier[Node <: SearchNode] {
  def replaceByState(childNode: Node): Frontier[Node]
  def getNode(state: State): Option[Node]
  def removeLeaf: Option[(Node, Frontier[Node])]
  def add(node: Node): Frontier[Node]
  def addAll(iterable: Iterable[Node]): Frontier[Node]
  def contains(state: State): Boolean
}

trait FrontierSearch {
  type Node <: SearchNode

  def newFrontier(state: State): Frontier[Node]
} 

//设置package包名称以及导入依赖的类
package science.wasabi.tini.bot


import scala.collection.immutable.Iterable

import akka.NotUsed
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.{Sink, Source}

import science.wasabi.tini._
import science.wasabi.tini.bot.commands._
import science.wasabi.tini.bot.discord.ingestion.{AkkaCordIngestion, Ingestion}
import science.wasabi.tini.bot.kafka.KafkaStreams
import science.wasabi.tini.config.Config


object BotMain extends App {
  println(Helper.greeting)

  implicit val config = Config.conf
  CommandRegistry.configure(config.bot.commands)

  case class Ping(override val args: String) extends Command(args) {}
  case class NoOp(override val args: String) extends Command(args) {}

  val ingestion: Ingestion = new AkkaCordIngestion

  import scala.concurrent.ExecutionContext.Implicits.global
  implicit val system = akka.actor.ActorSystem("kafka")
  implicit val materializer = ActorMaterializer()

  val kafka = new KafkaStreams

  // pipe to kafka
  def string2command(string: String): Iterable[Command] = CommandRegistry.getCommandsFor(string)
  val commandStream: Source[Command, NotUsed] = ingestion.source.mapConcat[Command](dmsg => string2command(dmsg.content))
  val commandTopicStream = commandStream.map(kafka.toCommandTopic)
  commandTopicStream
    .runWith(kafka.sink)
    .foreach(_ => println("Done Producing"))

  // read from kafka
  val commandStreamFromKafka = kafka.sourceFromCommandTopic()
  commandStreamFromKafka
    .map(command => println("out: " + command))
    .runWith(Sink.ignore)
    .foreach(_ => println("Done Consuming"))

  // TODO: add the reply steam thingy
} 

//设置package包名称以及导入依赖的类
package science.wasabi.tini.bot.commands


import scala.util.{Failure, Success, Try}
import scala.collection.immutable.Iterable

import science.wasabi.tini.bot.BotMain.{NoOp, Ping}


object CommandRegistry {

  private var commandRegistry: Map[String, Class[_ <: Command]] = Map(
    "!ping" -> classOf[Ping],
    "" -> classOf[NoOp]
  )

  case class CommandClassNotFound(notUsed: String) extends Command(argsIn = notUsed) with Serializable

  def configure(commands: Map[String, String]): Unit = {
    def convertToClass(name: String): Class[Command] = Try(Class.forName(name)) match {
      case Success(commandClazz) => commandClazz.asInstanceOf[Class[Command]]
      case Failure(exception) =>
        exception.printStackTrace()
        classOf[CommandClassNotFound].asInstanceOf[Class[Command]]
    }

    commandRegistry = commandRegistry ++ commands.map {
      case (prefix: String, clazz: String) => (prefix, convertToClass(clazz))
    }

    println(s"Commands are: ${CommandRegistry.commandRegistry}")
  }

  def getCommandsFor(args: String): Iterable[Command] = commandRegistry
    .filter { case (string, _) => args.startsWith(string) }
    .map { case (string, clazz) => clazz
      .getConstructor(classOf[String])
      .newInstance(args.drop(string.length).trim)
    }

  def unapply(args: String): Option[Command] = commandRegistry
    .find { case (string, _) => args.startsWith(string) }
    .map { case (string, clazz) => clazz
      .getConstructor(classOf[String])
      .newInstance(args.drop(string.length).trim)
    }
}

abstract class Command(argsIn: String) extends Serializable {
  val args: String = argsIn
} 

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

import org.slf4j.LoggerFactory
import play.api.libs.ws.{ WSRequest, WSRequestExecutor, WSRequestFilter, WSResponse }

import scala.concurrent.Future
import play.api.libs.concurrent.Execution.Implicits.defaultContext

import scala.collection.immutable.Iterable

case class AhcResponseLogger(
    headers: Boolean = true,
    statusCode: Boolean = true,
    body: Boolean = false
) extends WSRequestFilter {

  private val logger = LoggerFactory.getLogger(classOf[AhcResponseLogger])

  override def apply(executor: WSRequestExecutor): WSRequestExecutor = {
    new WSRequestExecutor {
      override def execute(request: WSRequest): Future[WSResponse] = {
        val futureResponse: Future[WSResponse] = executor.execute(request)
        futureResponse.map { response =>
          logStatusCode(response)
          logHeaders(response)
          logBody(response)
          response
        }
      }

      private def logStatusCode(response: WSResponse) = if (statusCode) {
        logger.info(s"${response.status} ${response.statusText}")
      }

      private def logHeaders(response: WSResponse) = if (headers) {
        val formattedHeaders: Iterable[String] = response.allHeaders.map(header => s"${header._1}: ${header._2.mkString(",")}")
        logger.info(formattedHeaders.mkString(start = "\n", sep = "\n", end = "\n"))
      }

      private def logBody(response: WSResponse) = if (body) {
        logger.info(s"${response.body}")
      }
    }
  }
}