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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 spark.ui
import javax.servlet.http.HttpServletRequest
import org.eclipse.jetty.server.{Handler, Server}
import spark.{Logging, SparkContext, Utils}
import spark.ui.env.EnvironmentUI
import spark.ui.storage.BlockManagerUI
import spark.ui.jobs.JobProgressUI
import spark.ui.JettyUtils._
/** Top level user interface for Spark */
private[spark] class SparkUI(sc: SparkContext) extends Logging {
val host = Utils.localHostName()
val port = Option(System.getProperty("spark.ui.port")).getOrElse(SparkUI.DEFAULT_PORT).toInt
var boundPort: Option[Int] = None
var server: Option[Server] = None
val handlers = Seq[(String, Handler)](
("/static", createStaticHandler(SparkUI.STATIC_RESOURCE_DIR)),
("/", createRedirectHandler("/stages"))
)
val storage = new BlockManagerUI(sc)
val jobs = new JobProgressUI(sc)
val env = new EnvironmentUI(sc)
val allHandlers = storage.getHandlers ++ jobs.getHandlers ++ env.getHandlers ++ handlers
/** Bind the HTTP server which backs this web interface */
def bind() {
try {
val (srv, usedPort) = JettyUtils.startJettyServer("0.0.0.0", port, allHandlers)
logInfo("Started Spark Web UI at http://%s:%d".format(host, usedPort))
server = Some(srv)
boundPort = Some(usedPort)
} catch {
case e: Exception =>
logError("Failed to create Spark JettyUtils", e)
System.exit(1)
}
}
/** Initialize all components of the server */
def start() {
// NOTE: This is decoupled from bind() because of the following dependency cycle:
// DAGScheduler() requires that the port of this server is known
// This server must register all handlers, including JobProgressUI, before binding
// JobProgressUI registers a listener with SparkContext, which requires sc to initialize
jobs.start()
}
def stop() {
server.foreach(_.stop())
}
private[spark] def appUIAddress = "http://" + host + ":" + boundPort.getOrElse("-1")
}
private[spark] object SparkUI {
val DEFAULT_PORT = "33000"
val STATIC_RESOURCE_DIR = "spark/ui/static"
}
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