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From huafengw <...@git.apache.org>
Subject [GitHub] incubator-gearpump pull request #104: Add InsertToHBase example
Date Mon, 31 Oct 2016 07:14:01 GMT
Github user huafengw commented on a diff in the pull request:

    https://github.com/apache/incubator-gearpump/pull/104#discussion_r85692859
  
    --- Diff: examples/streaming/hbase/src/main/scala/org/apache/gearpump/streaming/hbase/HBaseConn.scala
---
    @@ -0,0 +1,60 @@
    +/*
    + * 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.hbase
    +
    +
    +import akka.actor.ActorSystem
    +import org.apache.gearpump.cluster.UserConfig
    +import org.apache.gearpump.cluster.client.ClientContext
    +import org.apache.gearpump.cluster.main.{ArgumentsParser, CLIOption, ParseResult}
    +import org.apache.gearpump.streaming.StreamApplication
    +import org.apache.gearpump.streaming.source.DataSourceProcessor
    +import org.apache.gearpump.util.Graph.Node
    +import org.apache.gearpump.util.{AkkaApp, Graph, LogUtil}
    +import org.slf4j.Logger
    +
    +object HBaseConn extends AkkaApp with ArgumentsParser {
    +  private val LOG: Logger = LogUtil.getLogger(getClass)
    +  val RUN_FOR_EVER = -1
    +
    +  override val options: Array[(String, CLIOption[Any])] = Array(
    +    "splitNum" -> CLIOption[Int]("<how many sum tasks>", required = false, defaultValue
= Some(1))
    +  )
    +
    +  def application(config: ParseResult, system: ActorSystem): StreamApplication = {
    +    implicit val actorSystem = system
    +
    +    val splitNum = config.getInt("splitNum")
    +
    +    val split = new InsertToHBase
    +    val sourceProcessor = DataSourceProcessor(split, splitNum, "Split")
    --- End diff --
    
    It's weird. The `InsertToHBase` is actually a hbase sink that writes data to HBase, not
a DataSource.
    
    Why not create a `Split` class that will generate messages and then pass them to a `HBaseSink`?



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