Scala ServletContextHandler类代码示例

//设置package包名称以及导入依赖的类
#set( $symbol_pound = '#' )
#set( $symbol_dollar = '$' )
#set( $symbol_escape = '\' )
package ${package}

import javax.servlet.ServletContext

import nl.knaw.dans.lib.logging.DebugEnhancedLogging
import org.eclipse.jetty.ajp.Ajp13SocketConnector
import org.eclipse.jetty.server.Server
import org.eclipse.jetty.servlet.ServletContextHandler
import org.scalatra._
import org.scalatra.servlet.ScalatraListener

import scala.util.Try

class ${javaName}Service(serverPort: Int, app: ${javaName}App) extends DebugEnhancedLogging {
  import logger._

  private val server = new Server(serverPort)
  private val context = new ServletContextHandler(ServletContextHandler.NO_SESSIONS)
  context.addEventListener(new ScalatraListener() {
    override def probeForCycleClass(classLoader: ClassLoader): (String, LifeCycle) = {
      ("anonymous", new LifeCycle {
        override def init(context: ServletContext): Unit = {
          context.mount(new ${javaName}Servlet(app), "/")
        }
      })
    }
  })
  server.setHandler(context)
  info(s"HTTP port is ${symbol_dollar}{serverPort}")

  def start(): Try[Unit] = Try {
    info("Starting service...")
    server.start()
  }

  def stop(): Try[Unit] = Try {
    info("Stopping service...")
    server.stop()
  }

  def destroy(): Try[Unit] = Try {
    server.destroy()
    app.close()
  }
} 

//设置package包名称以及导入依赖的类
package net.sayuan.kafka

import java.io.File
import java.util.concurrent.{Executors, TimeUnit}

import io.prometheus.client.exporter.MetricsServlet
import org.apache.log4j.{Level, Logger}
import org.eclipse.jetty.server.Server
import org.eclipse.jetty.servlet.{ServletContextHandler, ServletHolder}
import org.json4s._
import org.json4s.jackson.JsonMethods._

case class Arguments(config: String = "config.json")

object KafkaOffsetExporter {
  def main(args: Array[String]) {
    implicit val formats = DefaultFormats
    val parser = new scopt.OptionParser[Arguments]("kafka-offset-exporter") {
      head("kafka-offset-exporter")
      opt[String]("config") action { (x,c) => c.copy(config = x) } text("config file.")
      help("help") text("prints this usage text")
    }
    parser.parse(args, Arguments()) match {
      case Some(args) => {
        val config = parse(new File(args.config)).extract[Config]
        start(config)
      }
      case _ =>
    }
  }

  def start(config: Config) {
    val server = new Server(config.port)
    val context = new ServletContextHandler()
    context.setContextPath("/")
    server.setHandler(context)
    context.addServlet(new ServletHolder(
      new MetricsServlet()), "/metrics")

    val scheduler = Executors.newScheduledThreadPool(1)
    scheduler.scheduleAtFixedRate(new KafkaOffsetUpdater(config), 0, config.interval, TimeUnit.SECONDS)

    server.start()
    server.join()
  }
} 

//设置package包名称以及导入依赖的类
package coder36.rack

import javax.servlet.http.{HttpServlet, HttpServletRequest, HttpServletResponse}

import com.typesafe.scalalogging.LazyLogging
import org.eclipse.jetty.server.Server
import org.eclipse.jetty.servlet.{ServletContextHandler, ServletHolder}

import scala.collection.mutable.Map

class RackServer extends LazyLogging {

  val port : Int = 8080
  var path : String = ""

  val apps = scala.collection.mutable.Map[String,RackServlet]()

  def map(path: String) : RackServer = {
    this.path = path
    this
  }

  def onto(rack: Rack) = {
    apps(path) = new RackServlet(rack, path)
  }

  def start() : RackServer = {
    val context = new ServletContextHandler(ServletContextHandler.SESSIONS)
    context.setContextPath("/")
    val server = new Server(port)
    server.setHandler(context)
    apps.foreach( app => context.addServlet(new ServletHolder(app._2), (app._1 + "/*").replaceAll("//", "/")) )
    println(s"\u001B[34mRack started... listening for HTTP on /0.0.0.0:${port}")
    server.start
    this
  }

}

class RackServlet(val rack: Rack, val path: String)  extends HttpServlet {

  override def service(request: HttpServletRequest, response: HttpServletResponse) {
    val res = Middleware.BaseRack( rack, request, response ).call(Map('base_path -> path))
    val status = res._1
    val headers = res._2
    val body = res._3
    response.setStatus(status)
    headers.foreach( (h) => response.addHeader(h._1, h._2))
    if( body != null ) response.getWriter().write(body)
  }
} 

//设置package包名称以及导入依赖的类
package works.weave.socks.aws.orders.main

import org.eclipse.jetty
import org.eclipse.jetty.servlet.ServletContextHandler
import org.eclipse.jetty.servlet.ServletHolder
import org.glassfish.jersey.servlet.ServletContainer
import org.slf4j.LoggerFactory
import org.springframework.stereotype.Component
import scala.collection.JavaConverters._
import scala.util.control.NonFatal
import Server._
import org.eclipse.jetty.util.log.Slf4jLog

@Component
class Server(val jerseyApp : JerseyApp) {

  def run() : Unit = {

    jetty.util.log.Log.setLog(new Slf4jLog())

    val port = System.getenv().asScala.getOrElse("PORT", "80").toInt

    val context = new ServletContextHandler(ServletContextHandler.SESSIONS)
    context.setContextPath("/")

    val jettyServer = new jetty.server.Server(port)
    jettyServer.setHandler(context)

    val servletContainer = new ServletContainer(jerseyApp)
    val servletHolder = new ServletHolder(servletContainer)
    context.addServlet(servletHolder, "/*")
    val jerseyServlet = servletHolder
    jerseyServlet.setInitOrder(0)

    try {
      Log.info("Starting jetty")
      jettyServer.start()
      Log.info("Jetty started")
      jettyServer.join()
      Log.info("Jetty exited")
    } finally {
      Log.info("Destroying jetty")
      try {
        jettyServer.destroy()
      } catch {
        case NonFatal(e) => Log.error("Error during Jetty shutdown", e)
      }
    }
  }
}

object Server {
  val Log = LoggerFactory.getLogger(classOf[Server])
}