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From Mich Talebzadeh <mich.talebza...@gmail.com>
Subject How to read configuration file parameters in Spark without mapping each parameter
Date Tue, 06 Aug 2019 21:34:27 GMT
Hi,

Assume that I have a configuration file as below with static parameters
some Strings, Integer and Double:

md_AerospikeAerospike {
dbHost = "rhes75"
dbPort = "3000"
dbConnection = "trading_user_RW"
namespace = "trading"
dbSetRead = "MARKETDATAAEROSPIKEBATCH"
dbSetWrite = "MARKETDATAAEROSPIKESPEED"
dbPassword = "aerospike"
bootstrapServers = "rhes75:9092, rhes75:9093, rhes75:9094, rhes564:9092,
rhes564:9093, rhes564:9094, rhes76:9092, rhes76:9093, rhes76:9094"
schemaRegistryURL = "http://rhes75:8081"
zookeeperConnect = "rhes75:2181, rhes564:2181, rhes76:2181"
zookeeperConnectionTimeoutMs = "10000"
rebalanceBackoffMS = "15000"
zookeeperSessionTimeOutMs = "15000"
autoCommitIntervalMS = "12000"
topics = "md"
memorySet = "F"
enableHiveSupport = "true"
sparkStreamingReceiverMaxRate = "0"
checkpointdir = "/checkpoint"
hbaseHost = "rhes75"
zookeeperHost = "rhes75"
zooKeeperClientPort = "2181"
batchInterval = 2
tickerWatch = "VOD"
priceWatch = 300.0
op_type = 1
}

Now in Scala code I do the following to read these parameters in:

  val dbHost = conf.getString("dbHost")
  val dbPort = conf.getString("dbPort")
  val dbConnection = conf.getString("dbConnection")
  val namespace = conf.getString("namespace")
  val dbSetRead = conf.getString("dbSetRead")
  val dbSetWrite = conf.getString("dbSetWrite")
  val dbPassword = conf.getString("dbPassword")
  val bootstrapServers = conf.getString("bootstrapServers")
  val schemaRegistryURL = conf.getString("schemaRegistryURL")
  val zookeeperConnect = conf.getString("zookeeperConnect")
  val zookeeperConnectionTimeoutMs =
conf.getString("zookeeperConnectionTimeoutMs")
  val rebalanceBackoffMS = conf.getString("zookeeperConnectionTimeoutMs")
  val zookeeperSessionTimeOutMs =
conf.getString("zookeeperSessionTimeOutMs")
  val autoCommitIntervalMS = conf.getString("autoCommitIntervalMS")
  val topics =  conf.getString("topics")
  val memorySet = conf.getString("memorySet")
  val enableHiveSupport = conf.getString("enableHiveSupport")
  val sparkStreamingReceiverMaxRate =
conf.getString("sparkStreamingReceiverMaxRate")
  val checkpointdir = conf.getString("checkpointdir")
  val hbaseHost = conf.getString("hbaseHost")
  val zookeeperHost = conf.getString("zookeeperHost")
  val zooKeeperClientPort = conf.getString("zooKeeperClientPort")
  val batchInterval = conf.getInt("batchInterval")
  val tickerWatch = conf.getString("tickerWatch")
  val priceWatch= conf.getDouble("priceWatch")
  val op_type = conf.getInt("op_type")

This is obviously tedious and error prone. Is there anyway of reading these
parameters generically through mapping or any other way please?

Thanks

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