[ 
https://issues.apache.org/jira/browse/BAHIR-116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15994561#comment-15994561
 ] 

ASF GitHub Bot commented on BAHIR-116:
--------------------------------------

Github user amarouni commented on a diff in the pull request:

    https://github.com/apache/bahir/pull/42#discussion_r114502066
  
    --- Diff: 
streaming-pubsub/examples/src/main/scala/org.apache.spark.examples.streaming.pubsub/PubsubWordCount.scala
 ---
    @@ -0,0 +1,150 @@
    +/*
    + * 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.
    + */
    +
    +// scalastyle:off println
    +package org.apache.spark.examples.streaming.pubsub
    +
    +import scala.collection.JavaConverters._
    +import scala.util.Random
    +
    +import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport
    +import com.google.api.client.json.jackson2.JacksonFactory
    +import com.google.api.services.pubsub.Pubsub.Builder
    +import com.google.api.services.pubsub.model.PublishRequest
    +import com.google.api.services.pubsub.model.PubsubMessage
    +import com.google.cloud.hadoop.util.RetryHttpInitializer
    +
    +import org.apache.spark.storage.StorageLevel
    +import org.apache.spark.streaming.pubsub.ConnectionUtils
    +import org.apache.spark.streaming.pubsub.PubsubTestUtils
    +import org.apache.spark.streaming.pubsub.PubsubUtils
    +import org.apache.spark.streaming.pubsub.SparkGCPCredentials
    +import org.apache.spark.streaming.Milliseconds
    +import org.apache.spark.streaming.StreamingContext
    +import org.apache.spark.SparkConf
    +
    +/**
    + * Consumes messages from a Google Cloud Pub/Sub subscription and does 
wordcount.
    + * In this example it use application default credentials, so need to use 
gcloud
    + * client to generate token file before running example
    + *
    + * Usage: PubsubWordCount <projectId> <subscription>
    + *   <projectId> is the name of Google cloud
    + *   <subscription> is the subscription to a topic
    + *
    + * Example:
    + *  # use gcloud client generate token file
    + *  $ gcloud init
    + *  $ gcloud auth application-default login
    + *
    + *  # run the example
    + *  $ bin/run-example \
    + *      org.apache.spark.examples.streaming.pubsub.PubsubWordCount 
project_1 subscription_1
    + *
    + */
    +object PubsubWordCount {
    +  def main(args: Array[String]): Unit = {
    +    if (args.length != 2) {
    +      System.err.println(
    +        """
    +          |Usage: PubsubWordCount <projectId> <subscription>
    +          |
    +          |     <projectId> is the name of Google cloud
    +          |     <subscription> is the subscription to a topic
    +          |
    +        """.stripMargin)
    +      System.exit(1)
    +    }
    +
    +    val Seq(projectId, subscription) = args.toSeq
    +
    +    val sparkConf = new SparkConf().setAppName("PubsubWordCount")
    +    val ssc = new StreamingContext(sparkConf, Milliseconds(2000))
    +
    +    val pubsubStream = PubsubUtils.createStream(ssc, projectId, 
subscription,
    +      SparkGCPCredentials.builder.build(), 
StorageLevel.MEMORY_AND_DISK_SER_2)
    +
    +    val wordCounts =
    +      pubsubStream.map(message => (new String(message.getData()), 
1)).reduceByKey(_ + _)
    +
    +    wordCounts.print()
    +
    +    ssc.start()
    +    ssc.awaitTermination()
    +  }
    +
    +}
    +
    +/**
    --- End diff --
    
    @bchen-talend Can you add a little description as for the above example ?


> Add Spark streaming connector for Google cloud Pub/Sub
> ------------------------------------------------------
>
>                 Key: BAHIR-116
>                 URL: https://issues.apache.org/jira/browse/BAHIR-116
>             Project: Bahir
>          Issue Type: New Feature
>          Components: Spark Streaming Connectors
>            Reporter: Bin Chen
>
> A spark streaming connector for [Google 
> Pub/Sub|https://cloud.google.com/pubsub/] 



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