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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3551) Sync Scala and Java Streaming Examples
Date Tue, 24 Jan 2017 21:50:27 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3551?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836689#comment-15836689
] 

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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