Scala ConnectException类代码示例

//设置package包名称以及导入依赖的类
package org.argus.jc.incremental.jawa
package remote

import java.net.{ConnectException, InetAddress, UnknownHostException}

import org.argus.jc.incremental.jawa.data.{CompilationData, CompilerData}
import org.jetbrains.jps.incremental.ModuleLevelBuilder.ExitCode


class RemoteServer(val address: InetAddress, val port: Int) extends Server with RemoteResourceOwner {
  def compile(compilerData: CompilerData, compilationData: CompilationData, client: Client): ExitCode = {
    val arguments = Arguments(compilerData, compilationData).asStrings

    try {
      send(serverAlias, arguments, client)
      ExitCode.OK
    } catch {
      case e: ConnectException =>
        val firstLine = s"Cannot connect to compile server at ${address.toString}:$port"
        val secondLine = "Trying to compile without it"
        val message = s"$firstLine\n$secondLine"
        client.warning(message)
        client.debug(s"$firstLine\n${e.toString}\n${e.getStackTrace.mkString("\n")}")
        JawaBuilder.localServer.compile(compilerData, compilationData, client)
      case e: UnknownHostException =>
        val message = "Unknown IP address of compile server host: " + address.toString
        client.error(message)
        client.debug(s"$message\n${e.toString}\n${e.getStackTrace.mkString("\n")}")
        ExitCode.ABORT
    }
  }
} 

//设置package包名称以及导入依赖的类
package info.armado.ausleihe.client.connection.exceptions

import javax.ws.rs.ProcessingException
import java.net.URI
import java.net.ConnectException
import info.armado.ausleihe.client.model.ConnectionProperties
import info.armado.ausleihe.client.model.Configuration

case class NotFoundException(val serverAddress: URI) extends Exception
case class BadRequestException(val serverAddress: URI) extends Exception
case class InternalServerErrorException(val serverAddress: URI) extends Exception
case class UnhandledStatusCodeException(val serverAddress: URI, val statusCode: Int) extends Exception

object ServerUnreachableException {
  def unapply(connectException: ConnectException): Option[URI] = Some(new URI(Configuration.connectionProperties.baseURL))
}

object ProcessingExceptionWrapper {
  def unapply(processException: ProcessingException): Option[Throwable] = Option(processException.getCause)
} 

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

import com.twitter.finagle.memcached.protocol.text.Memcached
import com.twitter.finagle.memcached.protocol.{Command, Response}
import com.twitter.finagle.Service
import com.twitter.finagle.builder.{Server, ClientBuilder, ServerBuilder}
import java.net.{ConnectException, Socket, InetSocketAddress}


object MemcachedProxy {
  def main(args: Array[String]) {
    assertMemcachedRunning()

    val client: Service[Command, Response] = ClientBuilder()
      .codec(Memcached())
      .hosts(new InetSocketAddress(11211))
      .hostConnectionLimit(1)
      .build()

    val proxyService = new Service[Command, Response] {
      def apply(request: Command) = client(request)
    }

    val server: Server = ServerBuilder()
      .codec(Memcached())
      .bindTo(new InetSocketAddress(8080))
      .name("memcachedproxy")
      .build(proxyService)
  }

  private[this] def assertMemcachedRunning() {
    try {
      new Socket("localhost", 11211)
    } catch {
      case e: ConnectException =>
        println("Error: memcached must be running on port 11211")
        System.exit(1)
    }

  }
} 

//设置package包名称以及导入依赖的类
package com.stulsoft.pkafka.scala

import java.net.{ConnectException, HttpURLConnection, SocketException, URL}

import org.slf4j.Logger
import org.slf4j.LoggerFactory


object CheckConnection {
  val logger: Logger = LoggerFactory.getLogger(CheckConnection.getClass)

  def checkConnection(): Boolean = {
    var available: Boolean = false
    val urlString: String = "http://localhost:9092"

    try {
      val url: URL = new URL(urlString)
      val con: HttpURLConnection = url.openConnection.asInstanceOf[HttpURLConnection]
      con.setRequestMethod("GET")
      val responseCode: Int = con.getResponseCode
      logger.debug("responseCode={}", responseCode)
    }
    catch {
      case e: ConnectException => logger.error("No connection with Kafka server. Error: {}", e.getMessage)
      case e: SocketException =>
        logger.info("Kafka server is available. {}", e.getMessage)
        available = true
      case e: Exception => logger.error("Failure", e)
    }
    available
  }

  def main(args: Array[String]): Unit = {
    logger.debug("==>CheckConnection")
    logger.debug("Is Kafka server available: {}", checkConnection())
    logger.debug("<==CheckConnection")
  }
} 

//设置package包名称以及导入依赖的类
package org.pgscala.embedded

import java.net.{ConnectException, Socket}
import java.security.MessageDigest
import java.util.Locale
import javax.xml.bind.DatatypeConverter

import com.typesafe.scalalogging.StrictLogging

object Util extends StrictLogging {
  def bin2Hex(binary: Array[Byte]): String =
    DatatypeConverter.printHexBinary(binary).toLowerCase(Locale.ROOT)

  def digest(text: String): Array[Byte] = {
    val md = MessageDigest.getInstance("SHA-256")
    md.digest(text.getBytes("UTF-8"))
  }

  lazy val isWindows: Boolean = OS.Name.resolved match {
    case Some(OS.Name.Windows) => true
    case _ => false
  }

  lazy val isUnix: Boolean = OS.Name.resolved match {
    case Some(OS.Name.Linux) | Some(OS.Name.OSX) => true
    case _ => false
  }

  private[this] def socketIsFree(host: String, port: Int): Boolean =
    try {
      logger.trace(s"Checking if port $port is free...")
      new Socket(host, port).close()
      logger.debug(s"Port $port is free, choosing it for the cluster")
      false
    } catch {
      case _: ConnectException =>
        true
    }

  def findFreePort(host: String, portRange: Range): Int =
    portRange.find(port => socketIsFree(host, port))
      .getOrElse(sys.error(s"Could not find free port in range: [${portRange.head},${portRange.last}]"))
} 

//设置package包名称以及导入依赖的类
package auth.http.util

import java.net.ConnectException

import com.google.inject.{Inject, Provider}
import play.api._
import play.api.http.{DefaultHttpErrorHandler, HttpErrorHandler}
import play.api.mvc.RequestHeader
import play.api.mvc._
import play.api.mvc.Results._
import play.api.routing.Router

import scala.concurrent.Future


class ConnectionErrorHandler @Inject()(env: Environment,
                                       config: Configuration,
                                       sourceMapper: OptionalSourceMapper,
                                       router: Provider[Router])
    extends DefaultHttpErrorHandler(env, config, sourceMapper, router) {

  private val logger = Logger(this.getClass)

  override def onServerError(request: RequestHeader, exception: Throwable): Future[Result] =
    exception match {
      case e: ConnectException ?
        logger.error(
            s"Connection failed for $request, transferring to ServiceUnavailable result", e)
        Future.successful(ServiceUnavailable(exception.getMessage))
      case e: Throwable ? super.onServerError(request, exception)
    }
} 

//设置package包名称以及导入依赖的类
import java.io.IOException
import java.net.ConnectException
import java.util.concurrent.TimeoutException

import akka.actor.ActorSystem
import akka.stream.{ActorMaterializer, ActorMaterializerSettings, Supervision}
import com.codahale.metrics.jvm.{ThreadStatesGaugeSet, MemoryUsageGaugeSet, GarbageCollectorMetricSet}

import scala.util.control.NonFatal

object RemoraApp extends App with nl.grons.metrics.scala.DefaultInstrumented {

  private val actorSystemName: String = "remora"
  implicit val actorSystem = ActorSystem(actorSystemName)

  metricRegistry.registerAll(new GarbageCollectorMetricSet)
  metricRegistry.registerAll(new MemoryUsageGaugeSet)
  metricRegistry.registerAll(new ThreadStatesGaugeSet)

  lazy val decider: Supervision.Decider = {
    case _: IOException | _: ConnectException | _: TimeoutException => Supervision.Restart
    case NonFatal(err: Throwable) =>
      actorSystem.log.error(err, "Unhandled Exception in Stream: {}", err.getMessage)
      Supervision.Stop
  }

  implicit val materializer = ActorMaterializer(
    ActorMaterializerSettings(actorSystem).withSupervisionStrategy(decider))(actorSystem)

  implicit val executionContext = actorSystem.dispatchers.lookup("kafka-consumer-dispatcher")
  val kafkaSettings = KafkaSettings(actorSystem.settings.config)
  val consumer = new RemoraKafkaConsumerGroupService(kafkaSettings)
  val kafkaClientActor = actorSystem.actorOf(KafkaClientActor.props(consumer), name = "kafka-client-actor")

  Api(kafkaClientActor).start()

}