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https://issues.apache.org/jira/browse/FLINK-3551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836689#comment-15836689
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ASF GitHub Bot commented on FLINK-3551:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2761#discussion_r97206069
--- Diff:
flink-examples/flink-examples-streaming/src/main/scala/org/apache/flink/streaming/scala/examples/iteration/IterateExample.scala
---
@@ -0,0 +1,137 @@
+/*
+ * 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.flink.streaming.scala.examples.iteration
+
+import java.util.Random
+
+import org.apache.flink.api.java.utils.ParameterTool
+import org.apache.flink.api.scala._
+import org.apache.flink.streaming.api.functions.source.SourceFunction
+import
org.apache.flink.streaming.api.functions.source.SourceFunction.SourceContext
+import org.apache.flink.streaming.api.scala.{DataStream,
StreamExecutionEnvironment}
+
+/**
+ * Example illustrating iterations in Flink streaming.
+ * <p> The program sums up random numbers and counts additions
+ * it performs to reach a specific threshold in an iterative streaming
fashion. </p>
+ *
+ * <p>
+ * This example shows how to use:
+ * <ul>
+ * <li>streaming iterations,
+ * <li>buffer timeout to enhance latency,
+ * <li>directed outputs.
+ * </ul>
+ * </p>
+ */
+object IterateExample {
+
+ private val Bound = 100
+
+ def main(args: Array[String]): Unit = {
+ // Checking input parameters
+ val params = ParameterTool.fromArgs(args)
+
+ // obtain execution environment and set setBufferTimeout to 1 to enable
+ // continuous flushing of the output buffers (lowest latency)
+ val env =
StreamExecutionEnvironment.getExecutionEnvironment.setBufferTimeout(1)
+
+ // make parameters available in the web interface
+ env.getConfig.setGlobalJobParameters(params)
+
+ // create input stream of integer pairs
+ val inputStream =
--- End diff --
I find it helpful to add the type of the DataStream.
> Sync Scala and Java Streaming Examples
> --------------------------------------
>
> Key: FLINK-3551
> URL: https://issues.apache.org/jira/browse/FLINK-3551
> Project: Flink
> Issue Type: Sub-task
> Components: Examples
> Affects Versions: 1.0.0
> Reporter: Stephan Ewen
> Assignee: Lim Chee Hau
>
> The Scala Examples lack behind the Java Examples
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