本文整理汇总了Scala中scala.util.Left类的典型用法代码示例。如果您正苦于以下问题:Scala Left类的具体用法?Scala Left怎么用?Scala Left使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Left类的12个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的Scala代码示例。
示例1: LogMessageReadersTest
//设置package包名称以及导入依赖的类
package x7c1.chaff.process
import org.scalatest.{FreeSpecLike, Matchers}
import x7c1.chaff.process.LogMessage.{Error, Info}
import x7c1.chaff.reader.Reader
import scala.util.{Left, Right}
class LogMessageReadersTest extends FreeSpecLike with Matchers {
"Seq[R[X, LogMessage]]" - {
".uniteSequentially can generate R[X, Unit] that" - {
val toMessage: Either[ProcessError, Seq[String]] => LogMessage = {
case Right(lines) => Info(lines mkString "\n")
case Left(error) => Error(error.cause.getMessage)
}
val target: Seq[ProcessRunner] => Seq[Reader[HasProcessLogger, LogMessage]] = {
_ map (_.lines) map (_ map toMessage)
}
"should run readers until Error found" in {
val runners = Seq(
ProcessRunner(Seq("ls")),
ProcessRunner(Seq("foobar"))
)
val logger = new BufferedLogger
target(runners).uniteSequentially run logger
logger.lines should contain inOrder("[run] ls", "[run] foobar")
}
"should stop execution when Error found" in {
val runners = Seq(
ProcessRunner(Seq("foobar")),
ProcessRunner(Seq("ls"))
)
val logger = new BufferedLogger
target(runners).uniteSequentially run logger
logger.lines should contain("[run] foobar")
logger.lines shouldNot contain("[run] ls")
}
}
}
}
开发者ID:x7c1,项目名称:Chaff,代码行数:45,代码来源:LogMessageReadersTest.scala
示例2: PaymentTransactionDiff
//设置package包名称以及导入依赖的类
package com.wavesplatform.state2.diffs
import cats.implicits._
import com.wavesplatform.settings.FunctionalitySettings
import com.wavesplatform.state2.reader.StateReader
import com.wavesplatform.state2.{ByteStr, Diff, LeaseInfo, Portfolio}
import scorex.account.Address
import scorex.transaction.ValidationError.GenericError
import scorex.transaction.{PaymentTransaction, ValidationError}
import scala.util.{Left, Right}
object PaymentTransactionDiff {
def apply(stateReader: StateReader, height: Int, settings: FunctionalitySettings, blockTime: Long)
(tx: PaymentTransaction): Either[ValidationError, Diff] = {
stateReader.paymentTransactionIdByHash(ByteStr(tx.hash)) match {
case Some(existing) if blockTime >= settings.requirePaymentUniqueIdAfter => Left(GenericError(s"PaymentTx is already registered: $existing"))
case _ => Right(Diff(height = height,
tx = tx,
portfolios = Map(
tx.recipient -> Portfolio(
balance = tx.amount,
LeaseInfo.empty,
assets = Map.empty)) combine Map(
Address.fromPublicKey(tx.sender.publicKey) -> Portfolio(
balance = -tx.amount - tx.fee,
LeaseInfo.empty,
assets = Map.empty
)),
paymentTransactionIdsByHashes = Map(ByteStr(tx.hash) -> tx.id)
))
}
}
}
开发者ID:wavesplatform,项目名称:Waves,代码行数:37,代码来源:PaymentTransactionDiff.scala
示例3: BalanceDiffValidation
//设置package包名称以及导入依赖的类
package com.wavesplatform.state2.diffs
import cats.implicits._
import com.wavesplatform.settings.FunctionalitySettings
import com.wavesplatform.state2.reader.StateReader
import com.wavesplatform.state2.{ByteStr, Diff, LeaseInfo, Portfolio}
import scorex.account.Address
import scorex.transaction.Transaction
import scorex.transaction.ValidationError.AccountBalanceError
import scala.util.{Left, Right}
object BalanceDiffValidation {
def apply[T <: Transaction](s: StateReader, time: Long, fs: FunctionalitySettings)(d: Diff): Either[AccountBalanceError, Diff] = {
val changedAccounts = d.portfolios.keySet
val positiveBalanceErrors: Map[Address, String] = changedAccounts.flatMap(acc => {
val oldPortfolio = s.accountPortfolio(acc)
val portfolioDiff = d.portfolios(acc)
val newPortfolio = oldPortfolio.combine(portfolioDiff)
val err = if (newPortfolio.balance < 0) {
Some(s"negative waves balance: $acc, old: ${oldPortfolio.balance}, new: ${newPortfolio.balance}")
} else if (newPortfolio.assets.values.exists(_ < 0)) {
Some(s"negative asset balance: $acc, new portfolio: ${negativeAssetsInfo(newPortfolio)}")
} else if (newPortfolio.effectiveBalance < 0) {
Some(s"negative effective balance: $acc, old: ${leaseWavesInfo(oldPortfolio)}, new: ${leaseWavesInfo(oldPortfolio)}")
} else if (newPortfolio.balance < newPortfolio.leaseInfo.leaseOut && time > fs.allowLeasedBalanceTransferUntil) {
Some(s"leased being more than own: $acc, old: ${leaseWavesInfo(oldPortfolio)}, new: ${leaseWavesInfo(oldPortfolio)}")
} else None
err.map(acc -> _)
}).toMap
if (positiveBalanceErrors.isEmpty) {
Right(d)
} else {
Left(AccountBalanceError(positiveBalanceErrors))
}
}
private def leaseWavesInfo(p: Portfolio): (Long, LeaseInfo) = (p.balance, p.leaseInfo)
private def negativeAssetsInfo(p: Portfolio): Map[ByteStr, Long] = p.assets.filter(_._2 < 0)
}
开发者ID:wavesplatform,项目名称:Waves,代码行数:48,代码来源:BalanceDiffValidation.scala
示例4: GenesisTransactionDiff
//设置package包名称以及导入依赖的类
package com.wavesplatform.state2.diffs
import com.wavesplatform.state2.{Diff, LeaseInfo, Portfolio}
import scorex.transaction.ValidationError.GenericError
import scorex.transaction.{GenesisTransaction, ValidationError}
import scala.util.{Left, Right}
object GenesisTransactionDiff {
def apply(height: Int)(tx: GenesisTransaction): Either[ValidationError, Diff] = {
if (height != 1) Left(GenericError("GenesisTransaction cannot appear in non-initial block"))
else
Right(Diff(height = height, tx = tx,
portfolios = Map(tx.recipient -> Portfolio(
balance = tx.amount,
LeaseInfo.empty,
assets = Map.empty))))
}
}
开发者ID:wavesplatform,项目名称:Waves,代码行数:20,代码来源:GenesisTransactionDiff.scala
示例5: foldM
//设置package包名称以及导入依赖的类
package com.wavesplatform
import cats.{Monad, Traverse}
import scorex.transaction.ValidationError.GenericError
import scorex.transaction.{Transaction, ValidationError}
import scala.util.{Left, Right, Try}
import scala.language.higherKinds
package object state2 {
def foldM[G[_], F[_], A, B](fa: F[A], z: B)(f: (B, A) => G[B])(implicit G: Monad[G], F: Traverse[F]): G[B] =
F.foldLeft(fa, G.pure(z))((gb, a) => G.flatMap(gb)(f(_, a)))
def safeSum(x: Long, y: Long): Long = Try(Math.addExact(x, y)).getOrElse(Long.MinValue)
implicit class EitherExt[L <: ValidationError, R](ei: Either[L, R]) {
def liftValidationError[T <: Transaction](t: T): Either[ValidationError, R] = {
ei.left.map(e => GenericError(e.toString))
}
}
implicit class EitherExt2[A, B](ei: Either[A, B]) {
def explicitGet(): B = ei match {
case Left(value) => throw new Exception(value.toString)
case Right(value) => value
}
}
}
开发者ID:wavesplatform,项目名称:Waves,代码行数:31,代码来源:package.scala
示例6: Committable
//设置package包名称以及导入依赖的类
package aecor.data
import cats.implicits._
import cats.{ Applicative, Eval, Functor, Monad, Traverse }
import scala.util.{ Left, Right }
final case class Committable[F[_], +A](commit: F[Unit], value: A) {
def map[B](f: A => B): Committable[F, B] = copy(value = f(value))
def traverse[G[_], B](f: A => G[B])(implicit G: Functor[G]): G[Committable[F, B]] =
G.map(f(value))(b => copy(value = b))
def foldLeft[B](b: B)(f: (B, A) => B): B = f(b, value)
}
object Committable {
implicit def catsMonadAndTraversInstance[F[_]: Applicative]
: Monad[Committable[F, ?]] with Traverse[Committable[F, ?]] =
new Monad[Committable[F, ?]] with Traverse[Committable[F, ?]] {
override def traverse[G[_], A, B](
fa: Committable[F, A]
)(f: (A) => G[B])(implicit evidence$1: Applicative[G]): G[Committable[F, B]] =
fa.traverse(f)
override def flatMap[A, B](
fa: Committable[F, A]
)(f: (A) => Committable[F, B]): Committable[F, B] =
f(fa.value)
override def tailRecM[A, B](
a: A
)(f: (A) => Committable[F, Either[A, B]]): Committable[F, B] = {
val c = f(a)
c.value match {
case Left(aa) => tailRecM(aa)(f)
case Right(b) => c.copy(value = b)
}
}
override def foldLeft[A, B](fa: Committable[F, A], b: B)(f: (B, A) => B): B =
fa.foldLeft(b)(f)
override def foldRight[A, B](fa: Committable[F, A], lb: Eval[B])(
f: (A, Eval[B]) => Eval[B]
): Eval[B] = f(fa.value, lb)
override def pure[A](x: A): Committable[F, A] = Committable.pure(x)
}
def pure[F[_]: Applicative, A](a: A): Committable[F, A] = Committable(().pure[F], a)
def unit[F[_]: Applicative]: Committable[F, Unit] = pure(())
def collector[F[_], A, B](
pf: PartialFunction[A, B]
): PartialFunction[Committable[F, A], Committable[F, B]] = {
case c if pf.isDefinedAt(c.value) => c.map(pf)
}
}
开发者ID:notxcain,项目名称:aecor,代码行数:56,代码来源:Committable.scala
示例7: main
//设置package包名称以及导入依赖的类
package com.rklick.graphx.process
import com.rklick.graphx.context.GraphXProcess
import com.rklick.graphx.domain.GraphComponent
import com.rklick.graphx.utils.SparkCommon
import scala.util.{Left, Right}
def main(args: Array[String]) {
val SCHEMA_OPTIONS = Map("header" -> "true", "inferSchema" -> "true")
val path = "src/main/resources/graph_data.csv"
val df = sqlContext.read.format("csv").options(SCHEMA_OPTIONS).load(path)
val graphComponent = GraphComponent("ID", "User", "Relationship", "RelationId")
processGraph(df, graphComponent) match {
case Right(data) => println(s"GraphX process successfully completed.")
sqlContext.sparkContext.stop()
case Left(error) => println(s"Error during graphX:::${error}")
sqlContext.sparkContext.stop()
}
}
}
开发者ID:rklick-solutions,项目名称:graphx-scala,代码行数:24,代码来源:GraphXMainProcess.scala
示例8: Utils
//设置package包名称以及导入依赖的类
package com.trainologic.samples.petclinic
import monix.eval.{ Task => MonixTask }
import scalaz.concurrent.{ Task => ScalazTask }
import monix.execution.Scheduler
import scala.util.{ Try, Right, Left, Either,Success, Failure }
import fs2.util.Suspendable
import fs2.util.Catchable
import fs2.util.Attempt
object Utils {
implicit class TryPimp[T](t: Try[T]) {
def toEither: Either[Throwable, T] = t.transform(s => Success(Right(s)), f => Success(Left(f))).get
}
implicit val taskCatchable = new Suspendable[MonixTask] with Catchable[MonixTask]{
override def pure[A](a: A): MonixTask[A] = MonixTask.pure(a)
override def flatMap[A, B](a: MonixTask[A])(f: A => MonixTask[B]) = a.flatMap(f)
override def suspend[A](fa: => MonixTask[A]): MonixTask[A] = MonixTask.suspend(fa)
override def fail[A](err: Throwable): MonixTask[A] = MonixTask.raiseError(err)
override def attempt[A](fa: MonixTask[A]): MonixTask[Attempt[A]] = fa.materialize.map(_.toEither)
}
implicit def monixTask2scalazTask[A](mtask: MonixTask[A])(implicit s: Scheduler): ScalazTask[A] = {
import scalaz.{ \/, -\/, \/- }
scalaz.concurrent.Task.async[A](
register => mtask.runAsync { tr =>
tr match {
case Success(r) => register(\/-(r))
case Failure(t) => register(-\/(t))
}
})
}
}
开发者ID:Trainologic,项目名称:petclinic_eff,代码行数:42,代码来源:Utils.scala
示例9: Failed
//设置package包名称以及导入依赖的类
import scala.util.{Either, Right, Left}
case class Failed(msg: String)
object UnitExample {
def write(): Either[Failed, Unit] = {
Right( () )
}
def log(): Either[Failed, Unit] = {
Left(Failed("during log"))
}
def cleanup(): Unit = {}
def run(): Either[Failed, Unit] =
write().map(_ => log())
}
object MarkerExample {
sealed trait Success
object Success extends Success
def write(): Either[Failed, Success] = {
Right(Success)
}
def log(): Either[Failed, Success] = {
Left(Failed("in log"))
//Right(success)
}
def run(): Either[Failed, Success] =
for {
_ <- write()
_ <- log()
} yield Success
def run0(): Either[Failed, Success] = {
write().flatMap(_ => log())
// Hurrah! Wont' compile -> write().map(_ => log())
}
}
object Main {
def main(args: Array[String]): Unit = {
println("\nUnit example:")
println( UnitExample.run() )
println("\n\nMarker-based example:")
println( MarkerExample.run() )
println("\n")
}
}
开发者ID:d6y,项目名称:discarded-values,代码行数:58,代码来源:main.scala
示例10: DeliverySchemeSpec
//设置package包名称以及导入依赖的类
package sangria.parser
import org.scalatest.{Matchers, WordSpec}
class DeliverySchemeSpec extends WordSpec with Matchers {
"DeliveryScheme" should {
"by default support `Try`" in {
import scala.util.{Success, Failure}
QueryParser.parse("{ field }") shouldBe a [Success[_]]
QueryParser.parse("}") shouldBe a [Failure[_]]
}
"support `Either`" in {
import sangria.parser.DeliveryScheme.Either
import scala.util.{Left, Right}
QueryParser.parse("{ field }") shouldBe a [Right[_, _]]
QueryParser.parse("}") shouldBe a [Left[_, _]]
}
"support exception throwing" in {
import sangria.parser.DeliveryScheme.Throw
import sangria.ast.Document
QueryParser.parse("{ field }") shouldBe a [Document]
a [SyntaxError] should be thrownBy QueryParser.parse("}")
}
}
}
开发者ID:gitprowl,项目名称:prowlgria,代码行数:31,代码来源:DeliverySchemeSpec.scala
示例11: AskDemoArticleParser
//设置package包名称以及导入依赖的类
package com.akkademy
import akka.actor.Actor
import akka.pattern._
import akka.util.Timeout
import com.akkademy.messages.{SetRequest, GetRequest}
import scala.concurrent.{Future, Await}
import scala.util.{Success, Failure, Either, Left, Right}
class AskDemoArticleParser(cacheActorPath: String,
httpClientActorPath: String,
articleParserActorPath: String,
implicit val timeout: Timeout) extends Actor {
val cacheActor = context.actorSelection(cacheActorPath)
val httpClientActor = context.actorSelection(httpClientActorPath)
val articleParserActor = Await.result(context.actorSelection(articleParserActorPath).resolveOne(), timeout.duration)
import scala.concurrent.ExecutionContext.Implicits.global
// for (
// httpResponse <- (httpClientActor ? uri).mapTo[HttpResponse];
// parsedArticle <- (articleParserActor ? ParseHtmlArticle(uri, httpResponse.body)).mapTo[ArticleBody]
// ) yield Left(parsedArticle)
}).mapTo[Either[ArticleBody, String]]
result onComplete {
case Success(article) =>
article.fold(x => cacheActor ! SetRequest(uri, x.body), _ => println("cached result!"))
article.fold(senderRef ! _, senderRef ! _)
case Failure(e) => senderRef ! akka.actor.Status.Failure(e)
}
}
}
开发者ID:josiah14,项目名称:AkkademyDb,代码行数:36,代码来源:AskDemoArticleParser.scala
示例12: BalanceDiffValidation
//设置package包名称以及导入依赖的类
package com.wavesplatform.state2.diffs
import cats.implicits._
import com.wavesplatform.settings.FunctionalitySettings
import com.wavesplatform.state2.reader.StateReader
import com.wavesplatform.state2.{ByteStr, Diff, LeaseInfo, Portfolio}
import scorex.account.Address
import scorex.transaction.Transaction
import scorex.transaction.ValidationError.AccountBalanceError
import scala.util.{Left, Right}
object BalanceDiffValidation {
def apply[T <: Transaction](s: StateReader, time: Long, fs: FunctionalitySettings)(tx: T, d: Diff): Either[AccountBalanceError, Diff] = {
val changedAccounts = d.portfolios.keySet
val positiveBalanceErrors: Map[Address, String] = changedAccounts.flatMap(acc => {
val oldPortfolio = s.accountPortfolio(acc)
val portfolioDiff = d.portfolios(acc)
val newPortfolio = oldPortfolio.combine(portfolioDiff)
val err = if (newPortfolio.balance < 0) {
Some(s"negative waves balance: $acc, old: ${oldPortfolio.balance}, new: ${newPortfolio.balance}")
} else if (newPortfolio.assets.values.exists(_ < 0)) {
Some(s"negative asset balance: $acc, new portfolio: ${negativeAssetsInfo(newPortfolio)}")
} else if (newPortfolio.effectiveBalance < 0) {
Some(s"negative effective balance: $acc, old: ${leaseWavesInfo(oldPortfolio)}, new: ${leaseWavesInfo(oldPortfolio)}")
} else if (newPortfolio.balance < newPortfolio.leaseInfo.leaseOut && time > fs.allowLeasedBalanceTransferUntil) {
Some(s"leased being more than own: $acc, old: ${leaseWavesInfo(oldPortfolio)}, new: ${leaseWavesInfo(oldPortfolio)}")
} else None
err.map(acc -> _)
}).toMap
if (positiveBalanceErrors.isEmpty) {
Right(d)
} else {
Left(AccountBalanceError(positiveBalanceErrors))
}
}
private def leaseWavesInfo(p: Portfolio): (Long, LeaseInfo) = (p.balance, p.leaseInfo)
private def negativeAssetsInfo(p: Portfolio): Map[ByteStr, Long] = p.assets.filter(_._2 < 0)
}
开发者ID:mikepijn,项目名称:wavesnode,代码行数:48,代码来源:BalanceDiffValidation.scala
注:本文中的scala.util.Left类示例整理自Github/MSDocs等源码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。 |
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