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package spark.deploy.worker.ui
import akka.actor.ActorRef
import akka.util.{Duration, Timeout}
import java.io.{FileInputStream, File}
import javax.servlet.http.HttpServletRequest
import org.eclipse.jetty.server.{Handler, Server}
import spark.deploy.worker.Worker
import spark.{Utils, Logging}
import spark.ui.JettyUtils
import spark.ui.JettyUtils._
import spark.ui.UIUtils
/**
* Web UI server for the standalone worker.
*/
private[spark]
class WorkerWebUI(val worker: Worker, val workDir: File, requestedPort: Option[Int] = None)
extends Logging {
implicit val timeout = Timeout(
Duration.create(System.getProperty("spark.akka.askTimeout", "10").toLong, "seconds"))
val host = Utils.localHostName()
val port = requestedPort.getOrElse(
System.getProperty("worker.ui.port", WorkerWebUI.DEFAULT_PORT).toInt)
var server: Option[Server] = None
var boundPort: Option[Int] = None
val indexPage = new IndexPage(this)
val handlers = Array[(String, Handler)](
("/static", createStaticHandler(WorkerWebUI.STATIC_RESOURCE_DIR)),
("/log", (request: HttpServletRequest) => log(request)),
("/logPage", (request: HttpServletRequest) => logPage(request)),
("/json", (request: HttpServletRequest) => indexPage.renderJson(request)),
("*", (request: HttpServletRequest) => indexPage.render(request))
)
def start() {
try {
val (srv, bPort) = JettyUtils.startJettyServer("0.0.0.0", port, handlers)
server = Some(srv)
boundPort = Some(bPort)
logInfo("Started Worker web UI at http://%s:%d".format(host, bPort))
} catch {
case e: Exception =>
logError("Failed to create Worker JettyUtils", e)
System.exit(1)
}
}
def log(request: HttpServletRequest): String = {
val defaultBytes = 100 * 1024
val appId = request.getParameter("appId")
val executorId = request.getParameter("executorId")
val logType = request.getParameter("logType")
val offset = Option(request.getParameter("offset")).map(_.toLong)
val byteLength = Option(request.getParameter("byteLength")).map(_.toInt).getOrElse(defaultBytes)
val path = "%s/%s/%s/%s".format(workDir.getPath, appId, executorId, logType)
val (startByte, endByte) = getByteRange(path, offset, byteLength)
val file = new File(path)
val logLength = file.length
val pre = "==== Bytes %s-%s of %s of %s/%s/%s ====\n"
.format(startByte, endByte, logLength, appId, executorId, logType)
pre + Utils.offsetBytes(path, startByte, endByte)
}
def logPage(request: HttpServletRequest): Seq[scala.xml.Node] = {
val defaultBytes = 100 * 1024
val appId = request.getParameter("appId")
val executorId = request.getParameter("executorId")
val logType = request.getParameter("logType")
val offset = Option(request.getParameter("offset")).map(_.toLong)
val byteLength = Option(request.getParameter("byteLength")).map(_.toInt).getOrElse(defaultBytes)
val path = "%s/%s/%s/%s".format(workDir.getPath, appId, executorId, logType)
val (startByte, endByte) = getByteRange(path, offset, byteLength)
val file = new File(path)
val logLength = file.length
val logText = <node>{Utils.offsetBytes(path, startByte, endByte)}</node>
val linkToMaster = <p><a href={worker.masterWebUiUrl}>Back to Master</a></p>
val range = <span>Bytes {startByte.toString} - {endByte.toString} of {logLength}</span>
val backButton =
if (startByte > 0) {
<a href={"?appId=%s&executorId=%s&logType=%s&offset=%s&byteLength=%s"
.format(appId, executorId, logType, math.max(startByte-byteLength, 0),
byteLength)}>
<button>Previous {Utils.memoryBytesToString(math.min(byteLength, startByte))}</button>
</a>
}
else {
<button disabled="disabled">Previous 0 B</button>
}
val nextButton =
if (endByte < logLength) {
<a href={"?appId=%s&executorId=%s&logType=%s&offset=%s&byteLength=%s".
format(appId, executorId, logType, endByte, byteLength)}>
<button>Next {Utils.memoryBytesToString(math.min(byteLength, logLength-endByte))}</button>
</a>
}
else {
<button disabled="disabled">Next 0 B</button>
}
val content =
<html>
<body>
{linkToMaster}
<hr />
<div>
<div style="float:left;width:40%">{backButton}</div>
<div style="float:left;">{range}</div>
<div style="float:right;">{nextButton}</div>
</div>
<br />
<div style="height:500px;overflow:auto;padding:5px;">
<pre>{logText}</pre>
</div>
</body>
</html>
UIUtils.basicSparkPage(content, logType + " log page for " + appId)
}
/** Determine the byte range for a log or log page. */
def getByteRange(path: String, offset: Option[Long], byteLength: Int)
: (Long, Long) = {
val defaultBytes = 100 * 1024
val maxBytes = 1024 * 1024
val file = new File(path)
val logLength = file.length()
val getOffset = offset.getOrElse(logLength-defaultBytes)
val startByte =
if (getOffset < 0) 0L
else if (getOffset > logLength) logLength
else getOffset
val logPageLength = math.min(byteLength, maxBytes)
val endByte = math.min(startByte+logPageLength, logLength)
(startByte, endByte)
}
def stop() {
server.foreach(_.stop())
}
}
private[spark] object WorkerWebUI {
val STATIC_RESOURCE_DIR = "spark/ui/static"
val DEFAULT_PORT="8081"
}
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