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/*
* (C) Copyright IBM Corp. 2017
*
* Licensed 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 com.ibm
import com.typesafe.config.ConfigFactory
import org.apache.toree.kernel.protocol.v5.client.boot.ClientBootstrap
import com.typesafe.config.Config
import org.apache.toree.kernel.protocol.v5.MIMEType
import org.apache.toree.kernel.protocol.v5.client.SparkKernelClient
import org.apache.toree.kernel.protocol.v5.client.boot.layers.{StandardHandlerInitialization, StandardSystemInitialization}
import org.apache.toree.kernel.protocol.v5.client.execution.DeferredExecution
import org.apache.toree.kernel.protocol.v5.content.{ExecuteReplyError, ExecuteReplyOk, ExecuteResult, StreamContent}
import py4j.GatewayServer
import scala.concurrent.{Await, Promise}
import scala.concurrent.duration.Duration
import org.slf4j.{Logger, LoggerFactory}
import scala.util.Try
class ToreeGateway(client: SparkKernelClient) {
final val log = LoggerFactory.getLogger(this.getClass.getName.stripSuffix("$"))
private def handleResult(promise:Promise[String], result: ExecuteResult) = {
log.warn(s"Result was: ${result.data(MIMEType.PlainText)}")
promise.success(result.data(MIMEType.PlainText))
//promise.success(result.content)
}
private def handleSuccess(promise:Promise[String], executeReplyOk: ExecuteReplyOk) = {
if(! promise.isCompleted) {
log.warn(s"Successful code completion")
promise.complete(Try("done"))
}
}
private def handleError(promise:Promise[String], reply:ExecuteReplyError) {
log.warn(s"Error was: ${reply.ename.get}")
//promise.failure(new Throwable("Error evaluating paragraph: " + reply.content))
promise.success(reply.status + ":" + reply.ename.getOrElse("") + " - " + reply.evalue.getOrElse(""))
}
private def handleStream(promise:Promise[String], content: StreamContent) {
log.warn(s"Received streaming content ${content.name} was: ${content.text}")
promise.success(content.text)
}
def eval(code: String): Object = {
val promise = Promise[String]
try {
val exRes: DeferredExecution = client.execute(code)
.onResult(executeResult => {
handleResult(promise, executeResult)
}).onError(executeReplyError =>{
handleError(promise, executeReplyError)
}).onSuccess(executeReplyOk => {
handleSuccess(promise, executeReplyOk)
}).onStream(streamResult => {
handleStream(promise, streamResult)
})
} catch {
case t : Throwable => {
log.info("Error submitting request: " + t.getMessage, t)
promise.success("Error submitting request: " + t.getMessage)
}
}
Await.result(promise.future, Duration.Inf)
}
}
object ToreeGatewayClient extends App {
final val log = LoggerFactory.getLogger(this.getClass.getName.stripSuffix("$"))
def getConfigurationFilePath: String = {
var filePath = "/opt/toree-gateway/conf/profile.json"
if (args.length == 0) {
for (arg <- args) {
if (arg.contains("json")) {
filePath = arg
}
}
}
filePath
}
log.info("Application Initialized from " + new java.io.File(".").getCanonicalPath)
log.info("With the following parameters:" )
if (args.length == 0 ) {
log.info(">>> NONE" )
} else {
for (arg <- args) {
log.info(">>> Arg :" + arg )
}
}
// Parse our configuration and create a client connecting to our kernel
val configFileContent = scala.io.Source.fromFile(getConfigurationFilePath).mkString
log.info(">>> Configuration in use " + configFileContent)
val config: Config = ConfigFactory.parseString(configFileContent)
val client = (new ClientBootstrap(config)
with StandardSystemInitialization
with StandardHandlerInitialization).createClient()
val toreeGateway = new ToreeGateway(client)
val gatewayServer: GatewayServer = new GatewayServer(toreeGateway)
gatewayServer.start()
}
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