From c7569272092eaceb5789e32a9e2987c09c3c4389 Mon Sep 17 00:00:00 2001
From: Luciano Resende <lresende@apache.org>
Date: Sat, 14 Jan 2017 10:46:21 -0800
Subject: Enhance Toree client invocation handlers

---
 src/main/scala/com/ibm/ToreeClient.scala | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/src/main/scala/com/ibm/ToreeClient.scala b/src/main/scala/com/ibm/ToreeClient.scala
index c9dedcf..8fcd059 100644
--- a/src/main/scala/com/ibm/ToreeClient.scala
+++ b/src/main/scala/com/ibm/ToreeClient.scala
@@ -7,24 +7,38 @@ 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.ExecuteResult
+import org.apache.toree.kernel.protocol.v5.content.{ExecuteReplyError, ExecuteReplyOk, ExecuteResult}
 import py4j.GatewayServer
 
 import scala.concurrent.{Await, Promise}
 import scala.concurrent.duration.Duration
-
 import org.slf4j.LoggerFactory
 
 class ToreeGateway(client: SparkKernelClient) {
-  //  Define our callback
-  def printResult(result: ExecuteResult) = {
+
+  def handleResult(promise:Promise[String], result: ExecuteResult) = {
+    promise.success(result.data.get(MIMEType.PlainText).get)
     println(s"Result was: ${result.data.get(MIMEType.PlainText).get}")
   }
 
+  def handleSuccess(promise:Promise[String], executeReplyOk: ExecuteReplyOk) = {
+    println(s"Successful code completion")
+    println(s"Result: ${executeReplyOk.evalue.get}")
+  }
+
+  def handleError(promise:Promise[String], reply:ExecuteReplyError) {
+    println(println(s"Error was: ${reply.ename.get}"))
+  }
+
   def eval(code: String): Object = {
     val promise = Promise[String]
-    val exRes: DeferredExecution = client.execute(code).onResult(er => {
-      promise.success(er.data.get(MIMEType.PlainText).get)
+    val exRes: DeferredExecution = client.execute(code)
+      .onResult(executeResult => {
+        handleResult(promise, executeResult)
+      }).onError(executeReplyError =>{
+      handleError(promise, executeReplyError)
+    }).onSuccess(executeReplyOk => {
+      handleSuccess(promise, executeReplyOk)
     })
 
     Await.result(promise.future, Duration.Inf)
-- 
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