gearpump-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From huafengw <...@git.apache.org>
Subject [GitHub] incubator-gearpump pull request #67: fix GEARPUMP-32, introduce source water...
Date Wed, 27 Jul 2016 10:06:15 GMT
Github user huafengw commented on a diff in the pull request:

    https://github.com/apache/incubator-gearpump/pull/67#discussion_r72413298
  
    --- Diff: examples/streaming/kafka/src/main/scala/org/apache/gearpump/streaming/examples/kafka/KafkaWriter.scala
---
    @@ -0,0 +1,106 @@
    +/*
    + * 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.gearpump.streaming.examples.kafka
    +
    +import java.util.{Random, Properties}
    +
    +import akka.actor.ActorSystem
    +import com.twitter.bijection.Injection
    +import org.apache.gearpump.{TimeStamp, Message}
    +import org.apache.gearpump.cluster.UserConfig
    +import org.apache.gearpump.cluster.client.ClientContext
    +import org.apache.gearpump.cluster.main.{ParseResult, CLIOption, ArgumentsParser}
    +import org.apache.gearpump.partitioner.ShufflePartitioner
    +import org.apache.gearpump.streaming.StreamApplication
    +import org.apache.gearpump.streaming.kafka.KafkaSink
    +import org.apache.gearpump.streaming.kafka.util.KafkaConfig
    +import org.apache.gearpump.streaming.sink.DataSinkProcessor
    +import org.apache.gearpump.streaming.source.{DataSource, DataSourceProcessor}
    +import org.apache.gearpump.streaming.task.TaskContext
    +import org.apache.gearpump.util.{Graph, LogUtil, AkkaApp}
    +import org.apache.gearpump.util.Graph._
    +import org.slf4j.Logger
    +
    +object KafkaWriter extends AkkaApp with ArgumentsParser {
    +  private val LOG: Logger = LogUtil.getLogger(getClass)
    +
    +  override val options: Array[(String, CLIOption[Any])] = Array(
    +    "sink" -> CLIOption[Int]("<hom many kafka processor tasks>", required =
false,
    +      defaultValue = Some(1)),
    +    "brokerList" -> CLIOption[String]("<broker server list string>", required
= false,
    +      defaultValue = Some("localhost:9092")),
    +    "sinkTopic" -> CLIOption[String]("<kafka sink topic>", required = false,
    +      defaultValue = Some("topic2"))
    +  )
    +
    +  def application(config: ParseResult, system: ActorSystem): StreamApplication = {
    +    implicit val actorSystem = system
    +    val appName = "KafkaWriter"
    +    val sinkNum = config.getInt("sink")
    +    val brokerList = config.getString("brokerList")
    +    val sinkTopic = config.getString("sinkTopic")
    +
    +    val source = new RandomSource
    +    val sourceProcessor = DataSourceProcessor(source, 1)
    +    val appConfig = UserConfig.empty
    +    val props = new Properties
    +    props.put(KafkaConfig.BOOTSTRAP_SERVERS_CONFIG, brokerList)
    +    val sink = new KafkaSink(sinkTopic, props)
    +    val sinkProcessor = DataSinkProcessor(sink, sinkNum)
    +    val partitioner = new ShufflePartitioner
    +    val graph = sourceProcessor ~ partitioner ~> sinkProcessor
    +    val app = StreamApplication(appName, Graph(graph), appConfig)
    +    app
    +  }
    +
    +  override def main(akkaConf: Config, args: Array[String]): Unit = {
    +    val config = parse(args)
    +    val context = ClientContext(akkaConf)
    +    val appId = context.submit(application(config, context.system))
    +    context.close()
    +  }
    +
    +  class RandomSource extends DataSource {
    +
    +    private var count = 0
    +    private var lowerBound = 0
    +    private val step = 10
    +    private val random = new Random
    +
    +    override def open(context: TaskContext, startTime: TimeStamp): Unit = {}
    +
    +    override def close(): Unit = {}
    +
    +    override def read(): Message = {
    +      // event times are not in order among every 10 messages
    +      val number = random.nextInt(10) + lowerBound
    +      val msg = Message(
    +        Injection[Long, Array[Byte]](number) -> Injection[Long, Array[Byte]](number))
    +      count += 1
    +      if (count == step) {
    --- End diff --
    
    count % step == 0 ?


---
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