bahir-reviews mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From bchen-talend <...@git.apache.org>
Subject [GitHub] bahir pull request #42: [BAHIR-116] Add spark streaming connector to Google ...
Date Thu, 04 May 2017 10:36:23 GMT
Github user bchen-talend commented on a diff in the pull request:

    https://github.com/apache/bahir/pull/42#discussion_r114743438
  
    --- 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 --
    
    done


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.
---

Mime
View raw message