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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark
import java.io.File
import java.net.InetAddress
import org.eclipse.jetty.server.Server
import org.eclipse.jetty.server.bio.SocketConnector
import org.eclipse.jetty.server.handler.DefaultHandler
import org.eclipse.jetty.server.handler.HandlerList
import org.eclipse.jetty.server.handler.ResourceHandler
import org.eclipse.jetty.util.thread.QueuedThreadPool
/**
* Exception type thrown by HttpServer when it is in the wrong state for an operation.
*/
private[spark] class ServerStateException(message: String) extends Exception(message)
/**
* An HTTP server for static content used to allow worker nodes to access JARs added to SparkContext
* as well as classes created by the interpreter when the user types in code. This is just a wrapper
* around a Jetty server.
*/
private[spark] class HttpServer(resourceBase: File) extends Logging {
private var server: Server = null
private var port: Int = -1
def start() {
if (server != null) {
throw new ServerStateException("Server is already started")
} else {
server = new Server()
val connector = new SocketConnector
connector.setMaxIdleTime(60*1000)
connector.setSoLingerTime(-1)
connector.setPort(0)
server.addConnector(connector)
val threadPool = new QueuedThreadPool
threadPool.setDaemon(true)
server.setThreadPool(threadPool)
val resHandler = new ResourceHandler
resHandler.setResourceBase(resourceBase.getAbsolutePath)
val handlerList = new HandlerList
handlerList.setHandlers(Array(resHandler, new DefaultHandler))
server.setHandler(handlerList)
server.start()
port = server.getConnectors()(0).getLocalPort()
}
}
def stop() {
if (server == null) {
throw new ServerStateException("Server is already stopped")
} else {
server.stop()
port = -1
server = null
}
}
/**
* Get the URI of this HTTP server (http://host:port)
*/
def uri: String = {
if (server == null) {
throw new ServerStateException("Server is not started")
} else {
return "http://" + Utils.localIpAddress + ":" + port
}
}
}
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